CN101763171B - Pen type optical device and method for improving uniformity degree of image and controlling indicator - Google Patents
Pen type optical device and method for improving uniformity degree of image and controlling indicator Download PDFInfo
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- CN101763171B CN101763171B CN2008101850281A CN200810185028A CN101763171B CN 101763171 B CN101763171 B CN 101763171B CN 2008101850281 A CN2008101850281 A CN 2008101850281A CN 200810185028 A CN200810185028 A CN 200810185028A CN 101763171 B CN101763171 B CN 101763171B
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Abstract
The invention provides a pen type optical device and a method for improving the uniformity degree of an image and controlling an indicator. The method for improving the uniformity degree of an image comprises the following steps of: providing a plurality of light emitting sources on an image receiving window of the pen type optical input device; dividing a plane type photoactive element in the pen type optical input device into a plurality of blocks; detecting brightness sensed by each block; and adjusting the brightness of a light emitting element adjacent to a specific block when the brightness value of the specific block in the blocks has a difference of a preset brightness value with the brightness value of a central block.
Description
Technical field
The invention relates to a kind of application technology of pen type optical input device, and particularly tilt, improve uniformity degree of image and pointer control method relevant for a kind of judgement light pen.
Background technology
Along with the progress of science and technology, (Identification, ID) technology is also more and more progressive for identification code.Identification code mainly is the otherness of utilizing between object, feature or bist data with computing machine automatic pick-up object, convert the storable numerical information of computer system to, and via the comparison processing or the data management of computer system, to reach the purpose of identification and management.The technology of identification code comprises bar code (Barcode), magnetic stripe (Magstripe), optical character identification (Optical Character Recognition, OCR), bio-identification (Biometric Recognition), smart card (Smartcard) and radio frequency identification (RadioFrequency Identification, RFID).Its purposes is very extensive, for example checks out, credit card, fingerprint recognition, phone IC-card and rapid transit EasyCard.
Optical identification sign indicating number (Optical Identification, OID) be a kind of technology that can in general printed matter, hide numerical data and the hiding numerical data of acquisition, it can be hidden in numerical data in the general printed matter by the print routine of standard and the printing ink of standard.By optics and the image processing techniques of optical identification pen (OID Pen), just can take out the data that are hidden in advance in the printed matter.
Fig. 1 is the structural drawing of known optical identification pen.Please refer to Fig. 1, this optical identification pen comprises shell 101, face type photo-sensitive cell 102, control circuit 103, interface circuit 104 and light-emitting component 105.Interface circuit 104 for example is a usb circuit, and it mainly is in order to connect computing machine, as the conversion of communications protocol.Control circuit 103 is to be used for chain of command type photo-sensitive cell 102 and light-emitting component 105.
Yet, general user when using pencil type apparatus, the angle that habitually can tilt, so, the face type photo-sensitive cell 102 received images of optical identification pen will have the phenomenon of brightness irregularities.Fig. 2 is that the right hand is held the optical identification pen, when angle of inclination about 40 is spent, and the image synoptic diagram that face type photo-sensitive cell 102 is received.Please refer to Fig. 2, rely on the optical identification Pen Association of single lighting source because the inclination that holds a pen makes image that dark angle or shade be arranged.The phenomenon of this kind brightness irregularities will have very big influence for the discrimination of optical identification.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of uniformity degree of image that improves exactly, in order to improve the uneven problem of Luminance Distribution of the image that the pen type optical input device received.
Another object of the present invention is exactly that a kind of method and pointer control method of judging that light pen tilts is being provided, Luminance Distribution in order to the image that received according to the pen type optical input device, determine direction or angle that the pen type optical input device tilts, further determine the moving direction and the translational speed of the pointer (Cursor) of operation calculation device.
For reaching above-mentioned or other purposes, the present invention proposes a kind of method of improving uniformity degree of image, be applicable to the image that a pen type optical input device is received, the method comprises the following steps: the image receive window at the pen type optical input device, and a plurality of light emitting sources are provided; Face type photo-sensitive cell in the pen type optical input device is divided into a plurality of blocks; Detect the brightness that each block senses; And in above-mentioned block, wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value, then adjusts the brightness of the light-emitting component that is adjacent to particular block.
The present invention proposes a kind of pointer control method in addition, be applicable to control one calculation element shown pointer on a display, wherein this calculation element couples a pen type optical input device, the method comprises: the image receive window at above-mentioned pen type optical input device provides at least one light emitting source; A type photo-sensitive cell in this pen type optical input device is divided into a plurality of blocks; Detect the brightness that each block senses; According to the difference of the brightness value of the brightness value of each block and a centerablock, judge the vergence direction and the angle of inclination of this light pen; According to the vergence direction of above-mentioned light pen, the moving direction of decision pointer; And according to the size at the angle of inclination of above-mentioned light pen, the translational speed of decision pointer.
The present invention proposes a kind of pen type optical input device in addition, is applicable to receive an image, and this device comprises a pen-type casing, type photo-sensitive cell, a plurality of light-emitting component and a control circuit.Pen-type casing has an optics receive window.Face type photo-sensitive cell is disposed in this pen-type casing, and its optics receiving plane is in the face of the optics receive window, and wherein, this face type photo-sensitive cell is divided into a plurality of blocks, and in addition, this face type photo-sensitive cell is in order to detect the brightness that each described a plurality of block senses.Above-mentioned a plurality of light-emitting component is disposed between optics receive window and this face type photo-sensitive cell.Control circuit is in order to control described a plurality of light-emitting component and this face type photo-sensitive cell.In a little blocks, wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value, and then this control circuit adjustment is adjacent to the brightness of the light-emitting component of this particular block.
Spirit of the present invention is to be the face type photo-sensitive cell in the pen type optical input device is divided into a plurality of blocks, therefore when the pen type optical input device tilts, just can utilize the luminance difference of each block and centerablock, the dark corner shading of process decision chart picture is to judge the vergence direction and the angle of light pen.Then, a plurality of light emitting sources are set, so just can control a plurality of intensities of light source respectively, to obtain brightness than uniform image at the image receive window of pen type optical input device.So, can increase the interpretability of image, and more help the subsequent applications of image.In addition, the method can be judged the light pen vergence direction, is applied in the pointer or the cursor control of calculation element according to this.
Description of drawings
Fig. 1 is the structural drawing of known optical identification pen.
Fig. 2 is that the right hand is held the optical identification pen, when angle of inclination about 40 is spent, and the image synoptic diagram that face type photo-sensitive cell 102 is received.
Fig. 3 is the installation drawing of the pen type optical input device that illustrates according to the embodiment of the invention.
Fig. 4 is the process flow diagram of the method for improving uniformity degree of image that is applied to above-mentioned pen type optical input device that illustrates according to the embodiment of the invention.
Fig. 5 be embodiment of the invention Fig. 3 face type photo-sensitive cell 302 cut apart figure.
Fig. 6 is that the another kind of the face type photo-sensitive cell 302 of embodiment of the invention Fig. 3 is cut apart figure.
Fig. 7 is the process flow diagram of the pointer control method that is applied to the pen type optical input device that illustrates according to the embodiment of the invention.
Drawing reference numeral:
101: shell
102,302: face type photo-sensitive cell
103,305: control circuit
104: interface circuit
105: light-emitting component
301: pen-type casing
303,304: light-emitting component
306: the optics receive window
S401～S406: the step of the method for improving uniformity degree of image of the embodiment of the invention
501～509: 9 blocks that face type photo-sensitive cell 302 is divided into
D501～D508: eight directions of block 501～508 representatives
601～617: 17 blocks that face type photo-sensitive cell 302 is divided into
D601～D616: ten six directions of block 601～616 representatives
S701～S707: the step of the pointer control method of the embodiment of the invention
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Fig. 3 is the installation drawing of the pen type optical input device that illustrates according to the embodiment of the invention.Please refer to Fig. 3, the general modal application of this pen type optical input device is the optical identification pen.This pen type optical input device comprises a pen-type casing 301, and its inside comprises face type photo-sensitive cell 302, light-emitting component 303,304 and control circuit 305.The light-sensitive surface of this face type photo-sensitive cell 302 is the optics receive windows 306 in the face of pen-type casing 301.Control circuit 305 is in order to control described a plurality of light-emitting component 303,304 and this face type photo-sensitive cell 302.In addition, because the restriction of drawing only shows two light-emitting components 303,304 during this is graphic, actual application does not limit and has only two light-emitting components.These will obtain explanation in following examples.
Fig. 4 is the process flow diagram of the method for improving uniformity degree of image that is applied to above-mentioned pen type optical input device that illustrates according to the embodiment of the invention.Please refer to Fig. 4, the method may further comprise the steps:
Step S401: beginning.
Step S402: the face type photo-sensitive cell in the pen type optical input device is divided into a plurality of blocks.Please refer to Fig. 5, Fig. 5 be embodiment of the invention Fig. 3 face type photo-sensitive cell cut apart figure.In this example, face type photo-sensitive cell is split into 9 blocks 501～509, is configured to nine palace lattice shapes.That is to say that the light-dark ratio example relation of eight direction D501～D508 can be arranged.In addition, be not to be limited to cutting apart of entity in this embodiment " face type photo-sensitive cell is divided into a plurality of blocks ", but can utilize software to make to cut apart or be categorized into a plurality of blocks.
Step S403: detect the brightness that each block senses.In order to simplify the detection of brightness, in general, the mean value of using the brightness of whole block is represented the brightness value of this block.
Step S404: relatively whether the luminance difference value of each block and centerablock is greater than certain predetermined brightness value.
Step S405:, then adjust the brightness of the light-emitting component that is adjacent to this particular block when the luminance difference of one of them block during greater than above-mentioned predetermined brightness value.Therefore, in this embodiment, under the ideal situation, should have 8 light-emitting components, with eight blocks 501～508 on corresponding eight direction D501～D508.In addition, following these steps S401～S405 with and the computing done all can carry out by control circuit 305.In general, the inclination of pen type optical input device only can cause a block the darkest, and another block on opposite is the brightest.For instance, when block 501 was the brightest block, block 505 will be the darkest block, and therefore, control circuit 305 can have following several control mode according to this step:
1. only the brightness of block 501 pairing light-emitting components is dimmed;
2. the brightness with block 501 pairing light-emitting components dims, and the brightness of block 505 pairing light-emitting components is lightened; And
3. only the brightness of block 505 pairing light-emitting components is lightened.
The selectivity design that these three kinds of control modes are devisers.The present invention does not limit this three kinds of modes.In addition, among the embodiment of above-mentioned Fig. 5, though face type photo-sensitive cell 302 is divided into 9 blocks, affiliated technical field has knows that usually the knowledgeable should be known in that being divided into 9 blocks only is a kind of embodiment, and being divided into N * N block can also implement.In addition, even be not divided into N * N block, also can for example cut apart with the form of Fig. 6, Fig. 6 is that the another kind of the face type photo-sensitive cell 302 of embodiment of the invention Fig. 3 is cut apart figure.Please refer to Fig. 6, this face type photo-sensitive cell 302 is divided into 17 blocks 601～617 altogether.The area of block 601～616 is identical, and the area of centerablock 617 is the twice of the area of block 601～616.
Step S406: finish.
Next, the present invention has proposed to utilize the defective of above-mentioned known technology in addition, and a kind of pointer control method of having done is in order to control calculation element, for example pointer of personal computer, notebook.Fig. 7 is the process flow diagram of the pointer control method that is applied to the pen type optical input device that illustrates according to the embodiment of the invention.Please refer to Fig. 7, in this example, it is the pen type optical input device of Fig. 3 of the embodiment of the invention that the pen type optical input device just not necessarily needs, and can also use the pen type optical input device of known Fig. 1.Besides before bright this method, earlier this pen type optical input device of hypothesis is couple to a personal computer by a computer interface, and is in order to controlling a mouse pointer, and this pointer control method comprises the following steps:
Step S701: beginning.
Step S702: a type photo-sensitive cell in the pen type optical input device is divided into a plurality of blocks.For example 17 blocks of the nine palace lattice of Fig. 5 or Fig. 6 all can.
Step S703: detect the brightness that each block senses.Same, in order to simplify computing, in general, the mean value of using the brightness of whole block is represented the brightness value of this block.
Step S704:, judge the vergence direction and the angle of inclination of pen type optical input device according to the difference of the brightness value of the brightness value of each block and a centerablock.Same reason, the inclination of pen type optical input device only can cause a block the darkest, and another block on opposite is the brightest.This is the important references pointer of judging vergence direction.Next, the luminance difference value of the luminance difference value of highlights piece and centerablock and dark space piece and centerablock is exactly to judge the important references pointer at angle of inclination.Relevant for the relation of luminance difference, can set up look-up table by experiment and implement, or other operational methods are implemented for the angle of inclination.Will not discuss at this.
Step S705: according to the vergence direction of above-mentioned pen type optical input device, the moving direction of decision pointer.
Step S706: according to the size at the angle of inclination of above-mentioned pen type optical input device, the translational speed of decision pointer.
Step S707: finish.
Though the foregoing description has proposed a kind of pointer control method, it is a kind of method of judging the inclination of pen type optical input device that above-mentioned steps S701～S704 can be considered as.Its application might not be limited in the control of pointer.Also for example can be applied in:
1. receive the correction of image; Or
2. be applied in computer graphics, the degree of tilt of pen type optical input device also can define the nib thickness of computer graphics.
In sum, spirit of the present invention is to be the face type photo-sensitive cell in the pen type optical input device is divided into a plurality of blocks, therefore when the pen type optical input device tilts, just can utilize the luminance difference of each block and centerablock, the dark corner shading of process decision chart picture is to judge the vergence direction and the angle of light pen.Then, a plurality of light emitting sources are set, so just can control a plurality of intensities of light source respectively, to obtain brightness than uniform image at the image receive window of pen type optical input device.So, can increase the interpretability of image, and more help the subsequent applications of image.In addition, the method can be judged the light pen vergence direction, is applied in the pointer or the cursor control of calculation element according to this.
The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to convenient explanation technology contents of the present invention, but not with narrow sense of the present invention be limited to the foregoing description, in the situation that does not exceed spirit of the present invention and claim scope, the many variations of being done is implemented, and all belongs to scope of the present invention.Therefore protection scope of the present invention defines and is as the criterion when looking appended claim scope.
Claims (10)
1. a method of improving uniformity degree of image is applicable to the image that an optical identification pen is received, and it is characterized in that described method comprises:
Image receive window at described optical identification pen provides a plurality of light emitting sources;
Face type photo-sensitive cell in the described optical identification pen is divided into a plurality of blocks;
Detect the brightness that each described a plurality of block senses; And
In described a plurality of blocks, wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value, then adjusts the brightness of the light-emitting component that is adjacent to described particular block.
2. the method for putting down in writing as claim 1 of improving uniformity degree of image, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, described wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value in described a plurality of blocks, and the step of then adjusting the brightness of the light-emitting component that is adjacent to described particular block comprises:
With the brightness value of described centerablock, make comparisons with the brightness value of all the other described a plurality of blocks, find out a brighter direction and dark direction; And
Strengthen the brightness of the light source of described dark direction, and weaken the brightness of the light source of described brighter direction, so that the brightness value of the brightness value of each described a plurality of block and described centerablock differs within described predetermined brightness value.
3. a method of judging that light pen tilts is applicable to an optical identification pen, it is characterized in that described method comprises:
Image receive window at described optical identification pen provides at least one light emitting source;
A type photo-sensitive cell in the described optical identification pen is divided into a plurality of blocks;
Detect the brightness that each described a plurality of block senses; And
According to the difference of the brightness value of the brightness value of each described a plurality of block and a centerablock, judge the vergence direction of described optical identification pen.
4. the method that tilts of the judgement light pen of putting down in writing as claim 3, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, described according to each described a plurality of block brightness value and the difference of the brightness value of a centerablock, judge that the step of the vergence direction of described optical identification pen comprises:
With the brightness value of described centerablock, make comparisons with the brightness value of all the other described a plurality of blocks, find out a highlights piece; And
According to the luminance difference value of described highlights piece and described centerablock, determine the vergence direction and the angle of inclination of described optical identification pen.
5. the method that tilts of the judgement light pen of putting down in writing as claim 3, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, described according to each described a plurality of block brightness value and the difference of the brightness value of a centerablock, judge that the vergence direction step of described optical identification pen comprises:
With the brightness value of described centerablock, make comparisons with the brightness value of all the other described a plurality of blocks, find out dark space piece; And
According to the luminance difference value of described dark space piece and described centerablock, determine the vergence direction and the angle of inclination of described optical identification pen.
6. pointer control method is applicable to control one calculation element shown pointer on a display, and wherein said calculation element couples an optical identification pen, it is characterized in that, described method comprises:
Image receive window at described optical identification pen provides at least one light emitting source;
A type photo-sensitive cell in the described optical identification pen is divided into a plurality of blocks;
Detect the brightness that each described a plurality of block senses;
According to the difference of the brightness value of the brightness value of each described a plurality of block and a centerablock, judge the vergence direction and the angle of inclination of described optical identification pen;
According to the vergence direction of described optical identification pen, determine the moving direction of described pointer; And
According to the size at the angle of inclination of described optical identification pen, determine the translational speed of described pointer.
7. the pointer control method of putting down in writing as claim 6, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, described according to each described a plurality of block brightness value and the difference of the brightness value of a centerablock, judge that the vergence direction of described optical identification pen and the step at angle of inclination comprise:
With the brightness value of described centerablock, make comparisons with the brightness value of all the other described a plurality of blocks, find out a highlights piece; And
According to the luminance difference value of described highlights piece and described centerablock, determine the vergence direction and the angle of inclination of described optical identification pen.
8. the pointer control method of putting down in writing as claim 6, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, described according to each described a plurality of block brightness value and the difference of the brightness value of a centerablock, judge that the vergence direction of described optical identification pen and the step at angle of inclination comprise:
With the brightness value of described centerablock, make comparisons with the brightness value of all the other described a plurality of blocks, find out dark space piece; And
According to the luminance difference value of described dark space piece and described centerablock, determine the vergence direction and the angle of inclination of described optical identification pen.
9. an optical identification pen is applicable to receive an image, it is characterized in that described device comprises:
One pen-type casing has an optics receive window;
A type photo-sensitive cell is disposed in the described pen-type casing, and its optics receiving plane is in the face of described optics receive window, wherein, described type photo-sensitive cell is divided into a plurality of blocks, and in addition, described type photo-sensitive cell is in order to detect the brightness that each described a plurality of block senses;
A plurality of light-emitting components are disposed between optics receive window and described the type photo-sensitive cell; And
One control circuit, in order to controlling described a plurality of light-emitting component and described type photo-sensitive cell,
In described a plurality of blocks, wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value, and then described control circuit adjustment is adjacent to the brightness of the light-emitting component of described particular block.
10. the optical identification pen of putting down in writing as claim 9, it is characterized in that, described type photo-sensitive cell is divided into N * N block, wherein N is an odd number, and N is greater than 1, and in described a plurality of blocks, wherein the brightness value of the brightness value of a particular block and a centerablock differs a predetermined brightness value, then described control circuit adjustment is adjacent to the brightness of the light-emitting component of described particular block, and the control flow of described control circuit comprises:
Described control circuit is with the brightness value of described centerablock, with the difference value of the brightness value of all the other described a plurality of blocks, finds out a brighter direction and dark direction; And
The brightness of the light source of the described dark direction of described control circuit control increases, and the brightness of controlling the light source of described brighter direction descends, so that the difference of the brightness value of the brightness value of each described a plurality of block and described centerablock differs within described predetermined brightness value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101850281A CN101763171B (en) | 2008-12-26 | 2008-12-26 | Pen type optical device and method for improving uniformity degree of image and controlling indicator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101850281A CN101763171B (en) | 2008-12-26 | 2008-12-26 | Pen type optical device and method for improving uniformity degree of image and controlling indicator |
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| CN101763171A CN101763171A (en) | 2010-06-30 |
| CN101763171B true CN101763171B (en) | 2011-12-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103699896A (en) * | 2012-09-27 | 2014-04-02 | 汉王科技股份有限公司 | Scanning device, and device and method for judging scanning angle by using image brightness information |
| CN107479728A (en) * | 2016-06-08 | 2017-12-15 | 立迈科技股份有限公司 | Active capacitive touch pen calibration method |
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| US6081261A (en) * | 1995-11-01 | 2000-06-27 | Ricoh Corporation | Manual entry interactive paper and electronic document handling and processing system |
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| CN101763171A (en) | 2010-06-30 |
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