WO1997009830A1 - Method and apparatus for determining the position of a tv camera for use in a virtual studio - Google Patents
Method and apparatus for determining the position of a tv camera for use in a virtual studio Download PDFInfo
- Publication number
- WO1997009830A1 WO1997009830A1 PCT/GB1996/002227 GB9602227W WO9709830A1 WO 1997009830 A1 WO1997009830 A1 WO 1997009830A1 GB 9602227 W GB9602227 W GB 9602227W WO 9709830 A1 WO9709830 A1 WO 9709830A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lines
- camera
- horizontal
- edge
- pattem
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/2224—Studio circuitry; Studio devices; Studio equipment related to virtual studio applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/74—Circuits for processing colour signals for obtaining special effects
- H04N9/75—Chroma key
Definitions
- the present invention relates to methods and apparatus for creating
- Chroma Key panels are known for use in TV studios. By focusing
- JP 57-93788 a chroma-key panel is used which includes a series
- Such features may include characters, symbols,
- the TV camera to be processed to ascertain the position of the camera.
- a TV camera relative to a panel when part of the panel is occluded by a
- the present invention therefore provides a method of determining
- the TV camera including the steps of identifying a plurality of edge points
- the method comprises the steps of identifying a plurality
- edges of each family lie on a set of parallel lines comprising at least two
- step of allocation is followed by computation of the
- the method also includes the step of projecting the edges
- the method further includes the step of assigning each
- a line is specified for each list of edges, edges not
- the method steps are then preferably repeated for vertical edges
- This comparison preferably comprises a first step of identifying a
- the perspective transformation is used to solve for .
- the patterned panel comprises a chroma-key panel having
- panel comprises two or more distance coded families of lines.
- the present invention also provides apparatus for determining the
- TV camera including:
- Figure 1 shows a patterned panel for use in the present invention
- Figure 2 shows a close up of a portion of the panel of Figure 1
- Figure 3 shows a perspective view of Figure 2 from one side
- Figure 4 shows a complex perspective view from one side
- Figure 5 illustrates the process for identification of edge points
- Figure 6 illustrates diagrammatically the initial vanishing point
- Figure 7 illustrates diagrammatically the rectified line image
- Figure 8 illustrates the projected line images for the horizontal
- Figure 9 shows the accurate video lines after final processing for
- FIG. 10 illustrates the inventive concept of using coded bundles
- FIG. 11 shows the top level flow of processing
- Figure 12 illustrates the line detection process.
- Figure 1 shows a patterned
- the lines need not be horizontal or vertical but will preferably
- each family lie on a set of parallel lines comprising at least two lines.
- orientations of the families are far apart such that an
- edge point can be assigned to a specific family by means of its orientation
- the TV camera 20 indicated diagrammatically is shown in Figure
- TV camera 20 is operated to zoom in to the area 10' shown dotted in
- the method of the present invention provides a means for
- video image can be identified.
- the method comprises identifying a large plurality of edge points
- Each edge point may be considered to
- the edge points are allocated in groups to specific lines in the
- lines 141, 142, line 141 being, for example, aligned with peak 161 and
- the edge points assigned to a most probable peak are processed to
- the least-squared error line can be computed.
- each line L4 may be
- the system can provide such information either in the case that one
- FIG. 11 shows the top level flow of the processing, staring from
- a chroma-keyer 1104 is used to determine whether false edges due to foreground objects.
- This segmentation is performed based on a key signal which
- the key image is preferably filtered 1106 to remove isolated features and
- Edge detection is then applied 1108 to the background image.
- the edge detection process consists of the following
- each pixel by means of x and y spatial derivatives.
- Each edge is projected through a vanishing point 1204 to produce a projection histogram which is analysed 1206, to find
- the list of peaks is compared with each edge point to assign
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69601880T DE69601880T2 (en) | 1995-09-08 | 1996-09-09 | METHOD AND DEVICE FOR CREATING THE POSITION OF A TELEVISION CAMERA FOR USE IN A VIRTUAL STUDIO |
BR9606555A BR9606555A (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a TV camera in relation to a configured panel that is viewed by the TV camera |
PL96325423A PL325423A1 (en) | 1995-09-08 | 1996-09-09 | Method of and apparatus for determining actual position of a televidion camera for use at an virtual television studio |
JP9511005A JPH11503588A (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for positioning television camera used in virtual studio |
IL12337296A IL123372A (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a tv camera for use in a virtual studio |
US08/765,898 US6304298B1 (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a TV camera for use in a virtual studio |
AU69353/96A AU6935396A (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a tv camera for use in a virtual studio |
EP96930236A EP0848886B1 (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a tv camera for use in a virtual studio |
NO981010A NO981010L (en) | 1995-09-08 | 1998-03-06 | Method and apparatus for determining the position of a television camera for use in a virtual studio |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9518432A GB2305050A (en) | 1995-09-08 | 1995-09-08 | Determining the position of a television camera for use in a virtual studio employing chroma keying |
GB9518432.1 | 1995-09-08 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/765,898 A-371-Of-International US6304298B1 (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a TV camera for use in a virtual studio |
US09/921,160 Continuation US20010048483A1 (en) | 1995-09-08 | 2001-08-02 | Method and apparatus for determining the position of a TV camera for use in a virtual studio |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997009830A1 true WO1997009830A1 (en) | 1997-03-13 |
Family
ID=10780450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/002227 WO1997009830A1 (en) | 1995-09-08 | 1996-09-09 | Method and apparatus for determining the position of a tv camera for use in a virtual studio |
Country Status (16)
Country | Link |
---|---|
US (2) | US6304298B1 (en) |
EP (1) | EP0848886B1 (en) |
JP (1) | JPH11503588A (en) |
CN (1) | CN1104816C (en) |
AT (1) | ATE178180T1 (en) |
AU (1) | AU6935396A (en) |
BR (1) | BR9606555A (en) |
DE (1) | DE69601880T2 (en) |
GB (1) | GB2305050A (en) |
HU (1) | HUP9900176A2 (en) |
IL (1) | IL123372A (en) |
NO (1) | NO981010L (en) |
PL (1) | PL325423A1 (en) |
TR (1) | TR199800397T2 (en) |
WO (1) | WO1997009830A1 (en) |
ZA (1) | ZA967588B (en) |
Cited By (4)
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WO1998044723A1 (en) * | 1997-04-02 | 1998-10-08 | Orad Hi-Tec Systems Limited | Virtual studio |
WO1998050889A1 (en) * | 1997-05-06 | 1998-11-12 | Dimensions As | Method for image processing |
JP4775678B2 (en) * | 1999-04-14 | 2011-09-21 | リベイ グラス インコーポレイテッド | Cooling system for glassware making machine |
EP3104330A1 (en) | 2015-06-09 | 2016-12-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Methods for tracking at least one object and method for replacing at least one object with a virtual object in a motion picture signal recorded by a camera |
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USRE47908E1 (en) | 1991-12-23 | 2020-03-17 | Blanding Hovenweep, Llc | Ergonomic man-machine interface incorporating adaptive pattern recognition based control system |
USRE48056E1 (en) | 1991-12-23 | 2020-06-16 | Blanding Hovenweep, Llc | Ergonomic man-machine interface incorporating adaptive pattern recognition based control system |
US10361802B1 (en) | 1999-02-01 | 2019-07-23 | Blanding Hovenweep, Llc | Adaptive pattern recognition based control system and method |
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- 1996-09-09 BR BR9606555A patent/BR9606555A/en not_active IP Right Cessation
- 1996-09-09 CN CN96196803A patent/CN1104816C/en not_active Expired - Fee Related
- 1996-09-09 DE DE69601880T patent/DE69601880T2/en not_active Expired - Fee Related
- 1996-09-09 TR TR1998/00397T patent/TR199800397T2/en unknown
- 1996-09-09 EP EP96930236A patent/EP0848886B1/en not_active Expired - Lifetime
- 1996-09-09 WO PCT/GB1996/002227 patent/WO1997009830A1/en active IP Right Grant
- 1996-09-09 JP JP9511005A patent/JPH11503588A/en active Pending
- 1996-09-09 IL IL12337296A patent/IL123372A/en not_active IP Right Cessation
- 1996-09-09 AT AT96930236T patent/ATE178180T1/en not_active IP Right Cessation
- 1996-09-09 PL PL96325423A patent/PL325423A1/en unknown
- 1996-09-09 AU AU69353/96A patent/AU6935396A/en not_active Abandoned
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998044723A1 (en) * | 1997-04-02 | 1998-10-08 | Orad Hi-Tec Systems Limited | Virtual studio |
WO1998050889A1 (en) * | 1997-05-06 | 1998-11-12 | Dimensions As | Method for image processing |
US6546153B1 (en) | 1997-05-06 | 2003-04-08 | Dimensions As | Method for image processing |
JP4775678B2 (en) * | 1999-04-14 | 2011-09-21 | リベイ グラス インコーポレイテッド | Cooling system for glassware making machine |
EP3104330A1 (en) | 2015-06-09 | 2016-12-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Methods for tracking at least one object and method for replacing at least one object with a virtual object in a motion picture signal recorded by a camera |
US10110822B2 (en) | 2015-06-09 | 2018-10-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for tracking at least one object and method for replacing at least one object by a virtual object in a moving image signal recorded by a camera |
Also Published As
Publication number | Publication date |
---|---|
BR9606555A (en) | 1998-12-15 |
PL325423A1 (en) | 1998-07-20 |
CN1196151A (en) | 1998-10-14 |
GB9518432D0 (en) | 1995-11-08 |
AU6935396A (en) | 1997-03-27 |
NO981010D0 (en) | 1998-03-06 |
DE69601880D1 (en) | 1999-04-29 |
CN1104816C (en) | 2003-04-02 |
DE69601880T2 (en) | 1999-07-29 |
IL123372A (en) | 2002-08-14 |
ZA967588B (en) | 1997-03-10 |
GB2305050A (en) | 1997-03-26 |
ATE178180T1 (en) | 1999-04-15 |
IL123372A0 (en) | 1998-09-24 |
EP0848886B1 (en) | 1999-03-24 |
NO981010L (en) | 1998-03-09 |
US20010048483A1 (en) | 2001-12-06 |
TR199800397T2 (en) | 1999-09-21 |
US6304298B1 (en) | 2001-10-16 |
JPH11503588A (en) | 1999-03-26 |
HUP9900176A2 (en) | 1999-04-28 |
EP0848886A1 (en) | 1998-06-24 |
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