WO2004107731A2 - Method and apparatus for analog insertion of low frequency watermarks - Google Patents
Method and apparatus for analog insertion of low frequency watermarks Download PDFInfo
- Publication number
- WO2004107731A2 WO2004107731A2 PCT/US2004/017355 US2004017355W WO2004107731A2 WO 2004107731 A2 WO2004107731 A2 WO 2004107731A2 US 2004017355 W US2004017355 W US 2004017355W WO 2004107731 A2 WO2004107731 A2 WO 2004107731A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- image sequence
- low frequency
- watermark
- light source
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
- G06T1/0028—Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0051—Embedding of the watermark in the spatial domain
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0052—Embedding of the watermark in the frequency domain
Definitions
- Embodiments of the present invention generally relate to insertion techniques for watermarks. More particularly, the present invention relates to insertion techniques for low frequency watermarks.
- Watermarking is a technique that can be used to detect the origin of a copy of audio and/or visual media. This technique is especially beneficial in the motion picture industry. Typically, when a motion picture is released, there is a very large market for unauthorized copies of the motion picture. Watermarking facilitates the detection of the origin of any unauthorized copies. Watermarking information is very critical in eliminating, or at least minimizing, piracy of copyrighted audio/visual content.
- a content owner needs forensic tools that enable the tracking of unauthorized copies back to the party who licensed the use of the content, and who was responsible for preventing its further distribution.
- the ability of the content owners to identify the exact distribution point at which material was stolen can be used as a tool to identify the responsible parties and can act as a deterrent to such theft.
- a watermark uniquely identifying the licensee of that copy of the content can serve this purpose. This tracking watermark will give content owners a powerful forensic tool against piracy, because it allows them to trace pirated copies to the individual customers (e.g., for video download), or to a specific post- production house, or to the time and location (e.g., for digital cinema) at which theft occurred.
- the present invention generally relates to a method and apparatus for inserting a watermark onto an illuminated image sequence.
- a light modulator modulates a light source.
- a controller controls the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
- a serial and/or parallel configuration may be used in order to insert the low frequency watermark onto the illuminated image sequence.
- a slit modulator may be used to facilitate high speed film printing.
- FIG. 1 illustrates a serial implementation of a watermarking apparatus according to one embodiment of the present invention
- FIG. 2 illustrates a parallel implementation of a watermarking apparatus according to one embodiment of the present invention
- FIG. 3 illustrates the present invention adapted for high speed film printing applications according to one embodiment of the present invention
- FIG. 4A illustrates watermark insertion using the apparatus disclosed in FIG. 3 according to one embodiment of the invention
- FIG. 4B illustrates watermark insertion using the apparatus disclosed in FIG. 3 according one embodiment of the invention.
- FIG. 5 illustrates a diagram in accordance with a method according to one embodiment of the invention.
- the present invention discloses insertion techniques for low frequency watermarks.
- insertion techniques for low frequency watermarks.
- some watermarking applications e.g., per-show fingerprinting of film-based cinema presentation
- this analog insertion can be done in an especially cost-effective manner, since its inherent low frequency nature allows the use of relatively low performance light modulating hardware (e.g., a low resolution liquid crystal light valve panel).
- Insertion techniques may be used for both printing and projecting stages. It is useful to mark at both these stages, since the film copy can be marked at the printing stage, while time of showing and other temporally dynamic information can be marked at projection time.
- a low spatiotemporal resolution light modulator is placed in series and/or parallel with a film printer or projector. It modulates the light source that would otherwise evenly illuminate each frame of the film, thus causing a subtle low frequency modulation in the printed or projected film content.
- the light modulator is controlled by a device that has been programmed in a previous profiling stage to determine appropriate modulations, with an optional sync signal from the projector or printer to help maintain temporal registration.
- a slit modulator may be used for slit-based high speed film printing.
- FIGs. 1 and 2 illustrate two embodiments of the invention, serial 100 and parallel 200.
- light from a lamp source 115, 215 is modified by a lens to maintain even distribution across the film plane.
- a light modulator 110, 210 modulates light from light source 115, 215.
- Light modulator 110, 210 may be a spatio-temporal light modulator. In one embodiment light modulator 110, 210 may be a liquid crystal light valve.
- FIG. 1 illustrates a serial embodiment of the present invention.
- a uniform plane of light is intercepted near the film plane 105 (e.g., just before or just after passing through the film 105), by a spatiotemporal light modulator 110 (e.g., liquid crystal light valve) that is controlled by a controller 125 to selectively increase and/or decrease its light transmissivity over space and time, to provide the slight, low frequency perturbations in luminance needed for watermarking.
- a spatiotemporal light modulator 110 e.g., liquid crystal light valve
- the light modulator 110 can be placed at some distance from the film plane, since the resulting blur of the modulator's image upon the film may be desired.
- the "resting" transmissivity of the light modulator 110 must be below 100%, with a consequent decrease in total light throughput that can be compensated by the use of a slightly brighter bulb in light source 115.
- positive excursions can be excluded.
- FIG. 2 illustrates a parallel embodiment 200 where a low resolution modulated image sequence of the watermark can be maintained alongside the main film image sequence, with light from two paths 230, 235 converging on the projector screen or surface to be printed (not shown).
- light from the illuminated image sequence comprises one path of light 230 and light from light modulator 210 comprises another path of light 235.
- the parallel apparatus 200 can create positive luminance excursion watermarks without any loss of overall contrast.
- the parallel embodiment 200 can be used to create positive luminance excursion watermarks instead of the serial embodiment 100.
- serial 100 and parallel 200 embodiments can also be used together, with negative-going marks handled by the serial branch and positive-going marks handled by the parallel branch. This dual approach allows for enabling both signs (positive/negative) of a watermark without any loss in overall contrast.
- FIG. 3 illustrates an embodiment of the present invention adapted for high speed film printing applications (e.g., release print generation) which are typically performed with an illuminated slit 330 and no shutter.
- a master film 335 and a film to be printed 340 There is a master film 335 and a film to be printed 340.
- the slit-based light modulator 310 operates only over the slit region 330, and modifies transmissivity appropriately for each spatial location in each frame by taking into account the speed at which the film traverses the slit 330.
- Light from light source 315 is passed through lens 320.
- Light modulator 310 adds the watermark as each frame of master film 335 and film to be printed 340 passes slit region 330.
- a feedback-based frame index signal received at controller 325 is useful for maintaining registration.
- a sensor near the slit could keep approximate track of the start and end of each frame going by, thus enabling more accurate modification of transmissivity for the intended watermark.
- FIG. 4A illustrates one embodiment of how a watermark is inserted onto an illuminated image sequence using slit-based film printing methods shown in FIG. 3.
- a low frequency watermark 410 is inserted by light modulator 310 onto the film.
- the intensity of the watermark rises slowly reaching a peak then decreases slowly as film 335, 340 moves past slit 330.
- FIG. 4B illustrates another embodiment of how a watermark is inserted onto an illuminated image sequence using slit-based film printing methods shown in FIG. 3.
- light modulator 310 modulates at a speed slower than the frame rate of film 335, 340.
- a low frequency watermark 420 is inserted by light modulator 310 over multiple frames of film.
- the intensity of the watermark 420 rises slowly reaching a peak then decreases slowly as multiple frames of film 335, 340 move past slit 330.
- watermark 420 will resemble a blurry bar that gradually fades in and out over the course of many frames.
- This embodiment allows the watermarking to be done in a more cost efficient manner.
- FIG. 5 illustrates a diagram in accordance with a method 500 of the present invention.
- Method 500 starts in step 505 and proceeds to step 510.
- a light source 115, 215, 315 is modulated with a light modulator 110, 210, 310.
- a watermark is inserted onto an illuminated image sequence.
- a controller 125, 225, 325 controls the light modulator 110, 210, 310 such that the watermark is inserted onto the illuminated image sequence.
- the controller 125, 225, 325 may be programmed by a previous profiling stage. If a profiling stage is used, locations for insertion of watermarks onto an illuminated image sequence are selected and stored.
- Controller 125, 225, 325 then implements the previously stored profile.
- the controller 125, 225, 325 may maintain a sync signal, e.g., a content index, in order to maintain temporal and/or spatial registration.
- a signal may be received from the printer or projector in order to allow the controller 125, 225, 325 to register the current frame, thus maintaining temporal and/or spatial registration.
- Method 500 ends in step 520.
- Serial and/or parallel embodiments may be implemented using straightforward optical assembly techniques.
- the fact that basic optical assembly techniques may be used allows the ability to retrofit existing projectors and printers, thus implementing the present invention at a potentially lower cost.
Abstract
A method and apparatus for inserting a watermark onto an illuminated image sequence. A light modulator modulates a light source. A controller controls the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
Description
METHOD AND APPARATUS FOR ANALOG INSERTION OF LOW FREQUENCY WATERMARKS
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims benefit of United States provisional patent application serial number 60/474,900, filed May 29, 2003, which is herein incorporated by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] Embodiments of the present invention generally relate to insertion techniques for watermarks. More particularly, the present invention relates to insertion techniques for low frequency watermarks.
Description of the Related Art
[0003] Watermarking is a technique that can be used to detect the origin of a copy of audio and/or visual media. This technique is especially beneficial in the motion picture industry. Typically, when a motion picture is released, there is a very large market for unauthorized copies of the motion picture. Watermarking facilitates the detection of the origin of any unauthorized copies. Watermarking information is very critical in eliminating, or at least minimizing, piracy of copyrighted audio/visual content.
[0004] Given these potential leaks, a content owner needs forensic tools that enable the tracking of unauthorized copies back to the party who licensed the use of the content, and who was responsible for preventing its further distribution. The ability of the content owners to identify the exact distribution point at which material was stolen can be used as a tool to identify the responsible parties and can act as a deterrent to such theft. A watermark uniquely identifying the licensee of that copy of the content can serve this purpose. This tracking watermark will give content owners a powerful forensic tool against piracy, because it allows them to trace pirated
copies to the individual customers (e.g., for video download), or to a specific post- production house, or to the time and location (e.g., for digital cinema) at which theft occurred.
[0005] Most watermarking methods use high frequency techniques to insert watermarks into audio/visual content. However, there are problems associated with high frequency watermarking techniques. High frequencies should be avoided because the reduced sensitivity of the Human Visual System (HVS) at high frequencies allows these components to be distorted by processing or attacked by adversaries without significant degradation to the fidelity of the content. Thus, watermark data in these components can be damaged. One might conclude that since there is also reduced HVS sensitivity at low frequencies that low frequencies should be avoided for the same reason. However, the high degree of information in the low frequency components makes them difficult to distort without degrading the fidelity of the content. Most optical and computational processes that are applied to moving imagery and result in "watchable" quality tend to reproduce these low frequency / high information components with high fidelity. For example, camcorder piracy, which often degrades middle and high frequencies to the extent that typical spread-spectrum watermarks are significantly damaged, still generally produces a video stream from which a viewer could describe in detail what is happening in each scene.
[0006] Therefore, there is a need in the art for a method and apparatus to provide low frequency watermarking of content.
SUMMARY OF THE INVENTION
[0007] In one embodiment, the present invention generally relates to a method and apparatus for inserting a watermark onto an illuminated image sequence. A light modulator modulates a light source. A controller controls the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence. In one embodiment a serial and/or parallel configuration may be used in order to insert the low frequency watermark onto the illuminated image sequence.
In another embodiment a slit modulator may be used to facilitate high speed film printing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
[0009] FIG. 1 illustrates a serial implementation of a watermarking apparatus according to one embodiment of the present invention;
[0010] FIG. 2 illustrates a parallel implementation of a watermarking apparatus according to one embodiment of the present invention;
[0011] FIG. 3 illustrates the present invention adapted for high speed film printing applications according to one embodiment of the present invention;
[0012] FIG. 4A illustrates watermark insertion using the apparatus disclosed in FIG. 3 according to one embodiment of the invention;
[0013] FIG. 4B illustrates watermark insertion using the apparatus disclosed in FIG. 3 according one embodiment of the invention; and
[0014] FIG. 5 illustrates a diagram in accordance with a method according to one embodiment of the invention.
DETAILED DESCRIPTION
[0015] The present invention discloses insertion techniques for low frequency watermarks. For some watermarking applications, e.g., per-show fingerprinting of film-based cinema presentation, it is desirable to insert the watermark into an analog
signal stream. For low frequency watermarks, this analog insertion can be done in an especially cost-effective manner, since its inherent low frequency nature allows the use of relatively low performance light modulating hardware (e.g., a low resolution liquid crystal light valve panel). Insertion techniques may be used for both printing and projecting stages. It is useful to mark at both these stages, since the film copy can be marked at the printing stage, while time of showing and other temporally dynamic information can be marked at projection time.
[0016] For low spatiotemporal frequency watermarking purposes, a low spatiotemporal resolution light modulator is placed in series and/or parallel with a film printer or projector. It modulates the light source that would otherwise evenly illuminate each frame of the film, thus causing a subtle low frequency modulation in the printed or projected film content. The light modulator is controlled by a device that has been programmed in a previous profiling stage to determine appropriate modulations, with an optional sync signal from the projector or printer to help maintain temporal registration. For slit-based high speed film printing, a slit modulator may be used.
[0017] FIGs. 1 and 2 illustrate two embodiments of the invention, serial 100 and parallel 200. As in most projection and transparency-based printing operations, light from a lamp source 115, 215 is modified by a lens to maintain even distribution across the film plane. A light modulator 110, 210 modulates light from light source 115, 215. Light modulator 110, 210 may be a spatio-temporal light modulator. In one embodiment light modulator 110, 210 may be a liquid crystal light valve.
[0018] FIG. 1 illustrates a serial embodiment of the present invention. A uniform plane of light is intercepted near the film plane 105 (e.g., just before or just after passing through the film 105), by a spatiotemporal light modulator 110 (e.g., liquid crystal light valve) that is controlled by a controller 125 to selectively increase and/or decrease its light transmissivity over space and time, to provide the slight, low frequency perturbations in luminance needed for watermarking. Note also that for low-frequency marking, the light modulator 110 can be placed at some distance from
the film plane, since the resulting blur of the modulator's image upon the film may be desired.
[0019] If both positive and negative excursions of the low frequency watermark are desired, the "resting" transmissivity of the light modulator 110 must be below 100%, with a consequent decrease in total light throughput that can be compensated by the use of a slightly brighter bulb in light source 115. Alternatively, for some watermarks, positive excursions can be excluded.
[0020] FIG. 2 illustrates a parallel embodiment 200 where a low resolution modulated image sequence of the watermark can be maintained alongside the main film image sequence, with light from two paths 230, 235 converging on the projector screen or surface to be printed (not shown). In this embodiment, light from the illuminated image sequence comprises one path of light 230 and light from light modulator 210 comprises another path of light 235. Note that the convergence need not happen outside the projector; that is, the two signals can be mixed optically inside the projector or printer for added security and repeatability. The parallel apparatus 200 can create positive luminance excursion watermarks without any loss of overall contrast. The parallel embodiment 200 can be used to create positive luminance excursion watermarks instead of the serial embodiment 100.
[0021] The serial 100 and parallel 200 embodiments can also be used together, with negative-going marks handled by the serial branch and positive-going marks handled by the parallel branch. This dual approach allows for enabling both signs (positive/negative) of a watermark without any loss in overall contrast.
[0022] FIG. 3 illustrates an embodiment of the present invention adapted for high speed film printing applications (e.g., release print generation) which are typically performed with an illuminated slit 330 and no shutter. There is a master film 335 and a film to be printed 340. Here, the slit-based light modulator 310 operates only over the slit region 330, and modifies transmissivity appropriately for each spatial location in each frame by taking into account the speed at which the film traverses the slit 330. Light from light source 315 is passed through lens 320. Light modulator
310 adds the watermark as each frame of master film 335 and film to be printed 340 passes slit region 330.
[0023] For slit-based operation, a feedback-based frame index signal received at controller 325 is useful for maintaining registration. For example, a sensor near the slit could keep approximate track of the start and end of each frame going by, thus enabling more accurate modification of transmissivity for the intended watermark.
[0024] FIG. 4A illustrates one embodiment of how a watermark is inserted onto an illuminated image sequence using slit-based film printing methods shown in FIG. 3. As film 335, 340 moves past slit 330, a low frequency watermark 410 is inserted by light modulator 310 onto the film. The intensity of the watermark rises slowly reaching a peak then decreases slowly as film 335, 340 moves past slit 330.
[0025] FIG. 4B illustrates another embodiment of how a watermark is inserted onto an illuminated image sequence using slit-based film printing methods shown in FIG. 3. In this embodiment, light modulator 310 modulates at a speed slower than the frame rate of film 335, 340. As film 335, 340 moves past slit 330, a low frequency watermark 420 is inserted by light modulator 310 over multiple frames of film. The intensity of the watermark 420 rises slowly reaching a peak then decreases slowly as multiple frames of film 335, 340 move past slit 330. In this instance watermark 420 will resemble a blurry bar that gradually fades in and out over the course of many frames. This embodiment allows the watermarking to be done in a more cost efficient manner.
[0026] FIG. 5 illustrates a diagram in accordance with a method 500 of the present invention. Method 500 starts in step 505 and proceeds to step 510. In step 510 a light source 115, 215, 315 is modulated with a light modulator 110, 210, 310. In step 515 a watermark is inserted onto an illuminated image sequence. A controller 125, 225, 325 controls the light modulator 110, 210, 310 such that the watermark is inserted onto the illuminated image sequence. The controller 125, 225, 325 may be programmed by a previous profiling stage. If a profiling stage is used, locations for insertion of watermarks onto an illuminated image sequence are
selected and stored. Controller 125, 225, 325 then implements the previously stored profile. Optionally, the controller 125, 225, 325 may maintain a sync signal, e.g., a content index, in order to maintain temporal and/or spatial registration. A signal may be received from the printer or projector in order to allow the controller 125, 225, 325 to register the current frame, thus maintaining temporal and/or spatial registration. Method 500 ends in step 520.
[0027] Serial and/or parallel embodiments may be implemented using straightforward optical assembly techniques. The fact that basic optical assembly techniques may be used allows the ability to retrofit existing projectors and printers, thus implementing the present invention at a potentially lower cost.
[0028] While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims
1. An apparatus for inserting a watermark, comprising:
1 a first light modulator for modulating a light source; and a controller for controlling the first light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
2. The apparatus of claim 1 , wherein the controller receives feedback from projector or printer in order to maintain spatio-temporal registration.
3. The apparatus of claim 1 , wherein the low frequency watermark is inserted onto the illuminated image sequence using a serial configuration.
4. The apparatus of claim 3, wherein the first light modulator is maintained at a distance from the film plane sufficient to cause appropriate levels of blur in the low frequency watermark.
5. The apparatus of claim 1 , wherein the low frequency watermark is inserted onto the illuminated image sequence using a parallel configuration.
6. The apparatus of claim 1 , wherein the low frequency watermark is inserted onto the illuminated image sequence using a serial configuration and a parallel configuration.
7. The apparatus of claim 1 , further comprising: a light source for illuminating an image sequence; and a lens for modifying the light from the light source, the modified light being modulated by the first light modulator.
8. The apparatus of claim 7, further comprising: an illuminated image sequence.
9. The apparatus of claim 1 , further comprising: a first light source for illuminating an image sequence; a first lens for modifying the light from the first light source, the modified light being modulated by the first light modulator; a second light source; a second lens for modifying the light from the second light source; a second light modulator for modulating the modified light from the second light source; and wherein the controller controls the first modulator and the second modulator such that the low frequency watermark is inserted onto the illuminated image sequence.
10. A method for inserting a watermark onto an illuminated image sequence, comprising: modulating a light source with a light modulator; and controlling the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47490003P | 2003-05-29 | 2003-05-29 | |
US60/474,900 | 2003-05-29 | ||
US10/856,022 US7756288B2 (en) | 2003-05-29 | 2004-05-28 | Method and apparatus for analog insertion of low frequency watermarks |
US10/856,022 | 2004-05-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004107731A2 true WO2004107731A2 (en) | 2004-12-09 |
WO2004107731A3 WO2004107731A3 (en) | 2005-04-21 |
Family
ID=33457649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/017355 WO2004107731A2 (en) | 2003-05-29 | 2004-06-01 | Method and apparatus for analog insertion of low frequency watermarks |
Country Status (2)
Country | Link |
---|---|
US (1) | US7756288B2 (en) |
WO (1) | WO2004107731A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7900260B2 (en) * | 2003-12-05 | 2011-03-01 | Microsoft Corporation | Method for lifetime tracking of intellectual property |
US7681040B2 (en) * | 2004-06-02 | 2010-03-16 | Margit Elisabeth Elo | Method for embedding security codes into film during printing |
US20080159586A1 (en) * | 2005-04-14 | 2008-07-03 | Koninklijke Philips Electronics, N.V. | Watermarking of an Image Motion Signal |
US20070284956A1 (en) * | 2006-06-13 | 2007-12-13 | Garrett Petrovich | Assembly for generating energy by magnetic polar repulsion |
JP2010531466A (en) * | 2007-06-25 | 2010-09-24 | トムソン ライセンシング | Anti-piracy coding technology |
EP2961157A1 (en) | 2014-06-23 | 2015-12-30 | Thomson Licensing | Message inserting method in a rendering of a video content by a display device, reading method, devices and programs associated |
US10991064B1 (en) | 2018-03-07 | 2021-04-27 | Adventure Soup Inc. | System and method of applying watermark in a digital image |
KR102523167B1 (en) * | 2018-07-02 | 2023-04-19 | 삼성전자주식회사 | Display apparatus and controlling method thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6208735B1 (en) * | 1997-09-10 | 2001-03-27 | Nec Research Institute, Inc. | Secure spread spectrum watermarking for multimedia data |
US20020168069A1 (en) * | 2001-02-28 | 2002-11-14 | Babak Tehranchi | Copy protection for digital motion picture image data |
US20030021439A1 (en) * | 2001-07-30 | 2003-01-30 | Jeffrey Lubin | Secure robust high-fidelity watermarking |
US20030063361A1 (en) * | 2001-10-02 | 2003-04-03 | Michihiro Ohnishi | Optical state modulation method and system, and optical state modulation apparatus |
US6577744B1 (en) * | 1996-10-28 | 2003-06-10 | International Business Machines Corporation | Protecting images with an image watermark |
US6624874B2 (en) * | 2001-12-21 | 2003-09-23 | Eastman Kodak Company | Apparatus and method for inserting an updateable hidden image into an optical path |
US6721437B1 (en) * | 1999-02-05 | 2004-04-13 | Sony Corporation | Data processing apparatus, coding apparatus, data processing method and coding method |
Family Cites Families (93)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5134496A (en) | 1989-05-26 | 1992-07-28 | Technicolor Videocassette Of Michigan Inc. | Bilateral anti-copying device for video systems |
US5319453A (en) | 1989-06-22 | 1994-06-07 | Airtrax | Method and apparatus for video signal encoding, decoding and monitoring |
US5828907A (en) | 1992-06-30 | 1998-10-27 | Discovision Associates | Token-based adaptive video processing arrangement |
US5396531A (en) | 1992-11-05 | 1995-03-07 | General Electric Company | Method of achieving reduced dose X-ray fluoroscopy by employing statistical estimation of poisson noise |
US5365552A (en) | 1992-11-16 | 1994-11-15 | Intel Corporation | Buffer fullness indicator |
US5404160A (en) | 1993-06-24 | 1995-04-04 | Berkeley Varitronics Systems, Inc. | System and method for identifying a television program |
US5398072A (en) | 1993-10-25 | 1995-03-14 | Lsi Logic Corporation | Management of channel buffer in video decoders |
US5452006A (en) | 1993-10-25 | 1995-09-19 | Lsi Logic Corporation | Two-part synchronization scheme for digital video decoders |
US5636292C1 (en) | 1995-05-08 | 2002-06-18 | Digimarc Corp | Steganography methods employing embedded calibration data |
DE69432480T2 (en) | 1993-11-18 | 2004-03-18 | Digimarc Corp., Tualatin | IDENTIFICATION / CERTIFICATION CODING METHOD AND DEVICE |
US7113615B2 (en) | 1993-11-18 | 2006-09-26 | Digimarc Corporation | Watermark embedder and reader |
US6983051B1 (en) | 1993-11-18 | 2006-01-03 | Digimarc Corporation | Methods for audio watermarking and decoding |
US5748763A (en) | 1993-11-18 | 1998-05-05 | Digimarc Corporation | Image steganography system featuring perceptually adaptive and globally scalable signal embedding |
US5841886A (en) | 1993-11-18 | 1998-11-24 | Digimarc Corporation | Security system for photographic identification |
US5862260A (en) | 1993-11-18 | 1999-01-19 | Digimarc Corporation | Methods for surveying dissemination of proprietary empirical data |
US5488570A (en) | 1993-11-24 | 1996-01-30 | Intel Corporation | Encoding and decoding video signals using adaptive filter switching criteria |
US5519780A (en) | 1993-12-03 | 1996-05-21 | Scientific-Atlanta, Inc. | System and method for providing compressed digital teletext services and teletext support services |
US5881176A (en) | 1994-09-21 | 1999-03-09 | Ricoh Corporation | Compression and decompression with wavelet style and binary style including quantization by device-dependent parser |
US5568570A (en) | 1994-09-30 | 1996-10-22 | Eastman Kodak Company | Method and apparatus for reducing quantization artifacts in a hierarchical image storage and retrieval system |
JP3224480B2 (en) | 1994-09-30 | 2001-10-29 | キヤノン株式会社 | Color image processing equipment |
US5646997A (en) | 1994-12-14 | 1997-07-08 | Barton; James M. | Method and apparatus for embedding authentication information within digital data |
US5530759A (en) | 1995-02-01 | 1996-06-25 | International Business Machines Corporation | Color correct digital watermarking of images |
US5659726A (en) | 1995-02-23 | 1997-08-19 | Sandford, Ii; Maxwell T. | Data embedding |
US5696848A (en) | 1995-03-09 | 1997-12-09 | Eastman Kodak Company | System for creating a high resolution image from a sequence of lower resolution motion images |
US5778102A (en) | 1995-05-17 | 1998-07-07 | The Regents Of The University Of California, Office Of Technology Transfer | Compression embedding |
CA2184949C (en) | 1995-09-28 | 2000-05-30 | Ingemar J. Cox | Secure spread spectrum watermarking for multimedia data |
US5905819A (en) | 1996-02-05 | 1999-05-18 | Eastman Kodak Company | Method and apparatus for hiding one image or pattern within another |
US5901178A (en) | 1996-02-26 | 1999-05-04 | Solana Technology Development Corporation | Post-compression hidden data transport for video |
US5664018A (en) | 1996-03-12 | 1997-09-02 | Leighton; Frank Thomson | Watermarking process resilient to collusion attacks |
US6018374A (en) * | 1996-06-25 | 2000-01-25 | Macrovision Corporation | Method and system for preventing the off screen copying of a video or film presentation |
KR100449354B1 (en) | 1996-07-16 | 2005-08-17 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Method and apparatus for detecting watermark embedded in information signal |
US5848155A (en) | 1996-09-04 | 1998-12-08 | Nec Research Institute, Inc. | Spread spectrum watermark for embedded signalling |
US5809139A (en) | 1996-09-13 | 1998-09-15 | Vivo Software, Inc. | Watermarking method and apparatus for compressed digital video |
US7130442B2 (en) | 1996-10-28 | 2006-10-31 | International Business Machines Corporation | Protecting images with an image watermark |
US5915027A (en) | 1996-11-05 | 1999-06-22 | Nec Research Institute | Digital watermarking |
US5907619A (en) | 1996-12-20 | 1999-05-25 | Intel Corporation | Secure compressed imaging |
FI105418B (en) | 1997-01-24 | 2000-08-15 | Nokia Multimedia Network Termi | Hiding the verification code on an electrical signal |
JP3686741B2 (en) | 1997-02-19 | 2005-08-24 | 富士通株式会社 | Identification information embedding method in image data, identification information extraction method from image data in which identification information is embedded, identification information embedding device in image data, identification information extraction device from image data in which identification information is embedded, and computer Readable medium |
US6211919B1 (en) | 1997-03-28 | 2001-04-03 | Tektronix, Inc. | Transparent embedment of data in a video signal |
US6137904A (en) | 1997-04-04 | 2000-10-24 | Sarnoff Corporation | Method and apparatus for assessing the visibility of differences between two signal sequences |
US6044156A (en) | 1997-04-28 | 2000-03-28 | Eastman Kodak Company | Method for generating an improved carrier for use in an image data embedding application |
TR199802744T1 (en) | 1997-04-30 | 1999-06-21 | Givaudan-Roure (International)S.A. | �ron �retimi i�in y�ntem |
US6208746B1 (en) | 1997-05-09 | 2001-03-27 | Gte Service Corporation | Biometric watermarks |
US6381367B1 (en) | 1997-05-29 | 2002-04-30 | Macrovision Corp. | Method and apparatus for compression compatible video fingerprinting |
US6101602A (en) | 1997-12-08 | 2000-08-08 | The United States Of America As Represented By The Secretary Of The Air Force | Digital watermarking by adding random, smooth patterns |
US5959717A (en) * | 1997-12-12 | 1999-09-28 | Chaum; Jerry | Motion picture copy prevention, monitoring, and interactivity system |
US6037984A (en) | 1997-12-24 | 2000-03-14 | Sarnoff Corporation | Method and apparatus for embedding a watermark into a digital image or image sequence |
US6208745B1 (en) | 1997-12-30 | 2001-03-27 | Sarnoff Corporation | Method and apparatus for imbedding a watermark into a bitstream representation of a digital image sequence |
US6373960B1 (en) | 1998-01-06 | 2002-04-16 | Pixel Tools Corporation | Embedding watermarks into compressed video data |
CA2269651A1 (en) | 1998-05-12 | 1999-11-12 | Lucent Technologies, Inc. | Transform domain image watermarking method and system |
US6553127B1 (en) | 1998-05-20 | 2003-04-22 | Macrovision Corporation | Method and apparatus for selective block processing |
US6944313B1 (en) | 1998-08-06 | 2005-09-13 | Canon Kabushiki Kaisha | Method and device for inserting and decoding a watermark in digital data |
US6188728B1 (en) | 1998-09-29 | 2001-02-13 | Sarnoff Corporation | Block motion video coding and decoding |
US6778678B1 (en) | 1998-10-02 | 2004-08-17 | Lucent Technologies, Inc. | High-capacity digital image watermarking based on waveform modulation of image components |
FR2785426B1 (en) | 1998-10-30 | 2001-01-26 | Canon Kk | METHOD AND DEVICE FOR INSERTING AND DETECTING A MARK IN DIGITAL DATA |
JP2000155798A (en) | 1998-11-18 | 2000-06-06 | Toshiba Corp | Method and system for device control |
US5991426A (en) | 1998-12-18 | 1999-11-23 | Signafy, Inc. | Field-based watermark insertion and detection |
US6678389B1 (en) | 1998-12-29 | 2004-01-13 | Kent Ridge Digital Labs | Method and apparatus for embedding digital information in digital multimedia data |
US6792129B1 (en) | 1999-08-25 | 2004-09-14 | Sharp Laboratories Of America | Digital watermarking in a perceptually uniform domain |
US6130741A (en) | 1999-09-27 | 2000-10-10 | Eastman Kodak Company | Embedding information in a digital image digitized from a developed photographic film |
US6665418B1 (en) | 1999-12-01 | 2003-12-16 | Eastman Kodak Company | Linear projective data embedding |
FR2803710B1 (en) | 2000-01-11 | 2002-03-22 | Canon Kk | METHOD AND DEVICE FOR INSERTING A MARK SIGNAL INTO AN IMAGE |
US6535617B1 (en) | 2000-02-14 | 2003-03-18 | Digimarc Corporation | Removal of fixed pattern noise and other fixed patterns from media signals |
US6687384B1 (en) | 2000-03-27 | 2004-02-03 | Sarnoff Corporation | Method and apparatus for embedding data in encoded digital bitstreams |
US6950532B1 (en) * | 2000-04-24 | 2005-09-27 | Cinea Inc. | Visual copyright protection |
US6763121B1 (en) | 2000-06-14 | 2004-07-13 | Hewlett-Packard Development Company, L.P. | Halftone watermarking method and system |
ATE358301T1 (en) * | 2000-06-23 | 2007-04-15 | Koninkl Philips Electronics Nv | WATERMARK EMBEDDING METHOD AND ARRANGEMENT |
US6594373B1 (en) | 2000-07-19 | 2003-07-15 | Digimarc Corporation | Multi-carrier watermarks using carrier signals modulated with auxiliary messages |
US7058199B1 (en) | 2000-08-14 | 2006-06-06 | The Hong Kong University Of Science And Technology | Methods and apparatus for hiding data in halftone images |
US6714683B1 (en) | 2000-08-24 | 2004-03-30 | Digimarc Corporation | Wavelet based feature modulation watermarks and related applications |
US6563936B2 (en) | 2000-09-07 | 2003-05-13 | Sarnoff Corporation | Spatio-temporal channel for images employing a watermark and its complement |
US6771795B1 (en) | 2000-09-07 | 2004-08-03 | Sarnoff Corporation | Spatio-temporal channel for image watermarks or data |
US7346776B2 (en) | 2000-09-11 | 2008-03-18 | Digimarc Corporation | Authenticating media signals by adjusting frequency characteristics to reference values |
US6760464B2 (en) | 2000-10-11 | 2004-07-06 | Digimarc Corporation | Halftone watermarking and related applications |
US6611608B1 (en) | 2000-10-18 | 2003-08-26 | Matsushita Electric Industrial Co., Ltd. | Human visual model for data hiding |
US6792130B1 (en) | 2000-12-13 | 2004-09-14 | Eastman Kodak Company | System and method for embedding a watermark signal that contains message data in a digital image |
US20020141584A1 (en) | 2001-01-26 | 2002-10-03 | Ravi Razdan | Clearinghouse for enabling real-time remote digital rights management, copyright protection and distribution auditing |
US20020168082A1 (en) | 2001-03-07 | 2002-11-14 | Ravi Razdan | Real-time, distributed, transactional, hybrid watermarking method to provide trace-ability and copyright protection of digital content in peer-to-peer networks |
US20020180973A1 (en) * | 2001-04-04 | 2002-12-05 | Mackinnon Nicholas B. | Apparatus and methods for measuring and controlling illumination for imaging objects, performances and the like |
US6785401B2 (en) | 2001-04-09 | 2004-08-31 | Tektronix, Inc. | Temporal synchronization of video watermark decoding |
US6892193B2 (en) | 2001-05-10 | 2005-05-10 | International Business Machines Corporation | Method and apparatus for inducing classifiers for multimedia based on unified representation of features reflecting disparate modalities |
JP3730538B2 (en) | 2001-05-31 | 2006-01-05 | 松下電器産業株式会社 | Dither processing device |
GB2383220B (en) | 2001-12-13 | 2005-11-30 | Sony Uk Ltd | Data processing apparatus and method |
US7392392B2 (en) | 2001-12-13 | 2008-06-24 | Digimarc Corporation | Forensic digital watermarking with variable orientation and protocols |
US6885757B2 (en) | 2002-04-18 | 2005-04-26 | Sarnoff Corporation | Method and apparatus for providing an asymmetric watermark carrier |
US8601504B2 (en) | 2002-06-20 | 2013-12-03 | Verance Corporation | Secure tracking system and method for video program content |
GB2390248A (en) | 2002-06-28 | 2003-12-31 | Sony Uk Ltd | Watermarking a reduced bandwidth version of material |
US7046820B2 (en) | 2002-07-16 | 2006-05-16 | Matsushita Electric Industrial Co., Ltd. | Methods for digital watermarking of images and images produced thereby |
US20040064702A1 (en) | 2002-09-27 | 2004-04-01 | Yu Hong Heather | Methods and apparatus for digital watermarking and watermark decoding |
US7769199B2 (en) | 2003-06-19 | 2010-08-03 | Jeffrey Lubin | Method and apparatus for providing reduced reference techniques for low frequency watermarking |
WO2004114208A2 (en) | 2003-06-19 | 2004-12-29 | Sarnoff Corporation | A method and apparatus for compressed-domain watermarking |
US20050036174A1 (en) | 2003-06-19 | 2005-02-17 | Jeffrey Lubin | Method and apparatus for providing a noise estimation for automatic selection of dither patterns in low frequency watermarks |
US7295681B2 (en) | 2005-01-27 | 2007-11-13 | Sarnoff Corporation | Method and apparatus for providing improved workflow for digital watermarking |
-
2004
- 2004-05-28 US US10/856,022 patent/US7756288B2/en active Active
- 2004-06-01 WO PCT/US2004/017355 patent/WO2004107731A2/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6577744B1 (en) * | 1996-10-28 | 2003-06-10 | International Business Machines Corporation | Protecting images with an image watermark |
US6208735B1 (en) * | 1997-09-10 | 2001-03-27 | Nec Research Institute, Inc. | Secure spread spectrum watermarking for multimedia data |
US6721437B1 (en) * | 1999-02-05 | 2004-04-13 | Sony Corporation | Data processing apparatus, coding apparatus, data processing method and coding method |
US20020168069A1 (en) * | 2001-02-28 | 2002-11-14 | Babak Tehranchi | Copy protection for digital motion picture image data |
US20030021439A1 (en) * | 2001-07-30 | 2003-01-30 | Jeffrey Lubin | Secure robust high-fidelity watermarking |
US20030063361A1 (en) * | 2001-10-02 | 2003-04-03 | Michihiro Ohnishi | Optical state modulation method and system, and optical state modulation apparatus |
US6624874B2 (en) * | 2001-12-21 | 2003-09-23 | Eastman Kodak Company | Apparatus and method for inserting an updateable hidden image into an optical path |
Non-Patent Citations (1)
Title |
---|
LUBIN, ET AL.: 'Robust, Content-Dependent, High Fidelity Watermark for Tracking in Digital Cinema' SECURITY AND WATERMARKING OF MULTIMEDIA CONTENTS V, PROCEEDINGS OF SPIE vol. 5020, 2003, pages 1 - 10, XP001203402 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004107731A3 (en) | 2005-04-21 |
US20040240705A1 (en) | 2004-12-02 |
US7756288B2 (en) | 2010-07-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6809792B1 (en) | Spectral watermarking for motion picture image data | |
Lubin et al. | Robust content-dependent high-fidelity watermark for tracking in digital cinema | |
EP1237369A2 (en) | Copy protection for digital motion picture image data | |
US7865034B2 (en) | Image display methods and systems with sub-frame intensity compensation | |
US6885757B2 (en) | Method and apparatus for providing an asymmetric watermark carrier | |
US7346185B2 (en) | Optical content modulation for visual copyright protection | |
CA2457272C (en) | A projector with enhanced security camcorder defeat | |
US20110280436A1 (en) | Embedding and detection of watermark in a motion image signal | |
US7634134B1 (en) | Anti-piracy image display methods and systems | |
JP2002519724A (en) | Method and apparatus for preventing illegal access to video material from theater screens | |
US20040150794A1 (en) | Projector with camcorder defeat | |
US7756288B2 (en) | Method and apparatus for analog insertion of low frequency watermarks | |
AU2006287912B2 (en) | Digital cinema projector watermarking system and method | |
KR20100017194A (en) | Movie based forensic data for digital cinema | |
Kumar et al. | Deterrence of Piracy Employing IR Transmitter and Steganography System | |
JP2004226859A (en) | Watermark embedding device, its method, watermark detector and its method | |
Sterling | Using LED Backlight Display Technology to Provide Passive Forensic Marking for High Value Content | |
CN117751378A (en) | Digital watermarking system and method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase |