CN100463532C - Automatic color adjusting process and apparatus - Google Patents
Automatic color adjusting process and apparatus Download PDFInfo
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- CN100463532C CN100463532C CNB2004100867592A CN200410086759A CN100463532C CN 100463532 C CN100463532 C CN 100463532C CN B2004100867592 A CNB2004100867592 A CN B2004100867592A CN 200410086759 A CN200410086759 A CN 200410086759A CN 100463532 C CN100463532 C CN 100463532C
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Abstract
This invention relates to automatic color adjusting method, which comprises the following steps: a, establishing operation window and aim window on the plane coordinate of first and second color signal, wherein, the aim window is in the operation window; inputting image point data to judge whether the first and second color signal values of the image point drop in between the operation window and aim window; if the image point drops in between the operation window and aim window, then adjusting first and second color signal values according to aim window.
Description
Technical field
The present invention relates to a kind of automatic color adjusting process and device, particularly relate to a kind of automatic color adjusting process and device that uses action pane and target window.
Background technology
Arriving along with digital Age, can find that the digital information product has replaced similar traditional product gradually, the most tangible example is exactly the use that present digital camera has replaced most of traditional camera gradually, thus the circulation of image information also from traditional similar image (photo) but the digitized video that is stored, duplicates, transmits by digitlization gradually replace.Therefore, the quality of digitized video also more and more comes into one's own.
At present, digitized video is unit with the pixel, and the color of each pixel is by being made of three primary colors (R, G, B), and each pixel color all has its brightness and chroma.The digitized video quality then is to depend primarily on factors such as its brightness that presents picture integral body, contrast and chroma.
As for existing processing to digitized video, be that first R, G, B value with each pixel of digitized video is converted to brightness (Y) signal and chroma (U, V) behind the signal, adjust luminance signal, chroma signals again, with respectively as to the adjustment of each pixel of digitized video on brightness, chroma, to improve brightness, contrast and the chroma of digitized video.
Mode with the adjustment chroma signals is an example, the existing mode of adjusting chroma signals can be adjusted automatically at the not enough zone of digitized video picture chroma, just the chroma signals in the not enough zone of this digitized video picture chroma is adjusted automatically, and the value of these chroma signals adjusted automatically and levels off to the chroma signals value of this regional center point, so that the picture that this regional chroma signals presented can more bright-colouredly reach the tone of being wanted.
This existing practice, though can adjust the chroma signals in the not enough zone of chroma automatically, but the chroma signals that this is regional is all adjusted when leveling off to the chroma signals value of this regional center point, though the picture that this regional chroma signals presented can be adjusted and become bright-coloured, but this existing mode of adjusting is too dull and make that easily adjusting back institute presents picture and be partial to single colour system, have loftyly on chroma and cause picture that adjustment region presents to be adjacent regional picture, inharmonic situation produces.
In view of this, the present invention proposes a kind of automatic color adjusting process and device, except that can adjusting automatically at the chroma signals of digitized video zone picture, more can make the chroma signals of this regional picture after adjustment, the picture that it presented can not link up on chroma with the picture of adjacent area, and is lofty and make the audience feel very to coordinate.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of automatic color adjusting process and device, when adjusting the chroma signals of digitized video zone picture, this chroma signals can be linked up on chroma with the picture of adjacent area at the picture that it presented after the adjustment, not lofty.
To achieve these goals, the invention provides a kind of automatic color adjusting process, its characteristics are, comprising: on the plane coordinates with first chroma signals and the second chroma signals place, set up an action pane and a target window, wherein this target window drops in this action pane; Import imaging point data, judge its first chroma signals value of this imaging point and the second chroma signals value whether drop between this action pane and this target window in the position on this plane coordinates; And if the position of this imaging point is to drop on the first chroma signals value and the second chroma signals value of then adjusting this imaging point between this action pane and this target window according to this target window.
Above-mentioned automatic color adjusting process, its characteristics are, according to the relation between this imaging point position and this target window border, adjust the first chroma signals value and the second chroma signals value of this imaging point.
Above-mentioned automatic color adjusting process, its characteristics be, according to this imaging point and to the relation between should its both positions of the borderline point of target window, adjusts the first chroma signals value and the second chroma signals value of this imaging point.
Above-mentioned automatic color adjusting process, its characteristics be, this imaging point its to decision that should the borderline point of target window, can according in this imaging point and this target window a bit between a line, and the intersection point of this line and this target window decides.
Above-mentioned automatic color adjusting process, its characteristics be, according to this imaging point and to the vector relations between should its both positions of the borderline point of target window, adjusts the first chroma signals value and the second chroma signals value of this imaging point.
Above-mentioned automatic color adjusting process, its characteristics are, if this imaging point represents with A, this imaging point is to should target window is borderline representing with B, with A ' expression, then the relational expression between A ' and A can be expressed as after the first chroma signals value of this imaging point and the second chroma signals value adjustment:
A’＝A+Gain＊(B—A)
Wherein Gain is a gain coefficient.
Above-mentioned automatic color adjusting process, its characteristics are that this gain coefficient can have different value according to this action pane.
Above-mentioned automatic color adjusting process, its characteristics are that the relation between this gain coefficient and this action pane can be linear function.
Above-mentioned automatic color adjusting process, its characteristics are that wherein this linear function can divide section and have different slopes.
Above-mentioned automatic color adjusting process, its characteristics are that this action pane is a rectangle or a rhombus.
Above-mentioned automatic color adjusting process, its characteristics are that this target window is a rectangle or a rhombus.
Above-mentioned automatic color adjusting process, its characteristics be, when this action pane is a rectangle, forms this rectangle with 2 positions of this plane coordinates.
Above-mentioned automatic color adjusting process, its characteristics are that this target window is positioned at the central authorities of this action pane.
The present invention also provides a kind of automatic color adjusting device, its characteristics are, comprise: a comparison means receives an action pane signal, a target window signal, one first chroma signals and one second chroma signals, to export one first compare result signal and one second compare result signal; One logic gate receives this first comparison signal and this second comparison signal to export a control signal; And one paint value calculation apparatus, receives this first chroma signals, this second chroma signals and this control signal, to produce one the 3rd chroma signals and one the 4th chroma signals.
Above-mentioned automatic color adjusting device, its characteristics are that this comparison means also comprises: one first comparator receives this first chroma signals, this second chroma signals and this action pane signal, to export this first compare result signal; And one second comparator, receive this first chroma signals, this second chroma signals and this target window signal, to export this second compare result signal.
Above-mentioned automatic color adjusting device, its characteristics be, this logic gate be one with door.
Above-mentioned automatic color adjusting device, its characteristics are that this logic gate is a NAND gate.
Above-mentioned automatic color adjusting device, its characteristics are that this is painted value calculation apparatus and also comprises: a subtracter receives this first chroma signals, this second chroma signals and this target window signal, to export a vector signal; One multiplier receives this vector signal and a gain signal, to export a gain vector signal; And an adder, receive this first chroma signals, this second chroma signals and this gain vector signal, to export the 3rd chroma signals and the 4th chroma signals.
Effect of the present invention, be by the mode of defining operation window and target window and with these two service areas that window was limited, go to be adjusted at the chroma signals value in the service area, and the adjustment of chroma signals can only limit to according to certain a bit, but according to window, and can make the adjustment of chroma signals more appropriate, its picture that presents does not have discontinuous, lofty phenomenon yet.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the process step figure of the automatic color adjusting process of preferred embodiment of the present invention;
Fig. 2 is the automatic color adjusting schematic representation of apparatus of preferred embodiment of the present invention;
Fig. 3 is the operation chart of the automatic color adjusting device of preferred embodiment of the present invention;
Fig. 4 A ~ Fig. 4 D is the action pane of preferred embodiment of the present invention and the schematic diagram of target window;
Fig. 5 is the schematic diagram between the corresponding points of the point coordinates position of preferred embodiment of the present invention and target window;
Fig. 6 is the yield value of preferred embodiment of the present invention and the graph of a relation of action pane.
Wherein, Reference numeral:
101 ~ 105-step
200-automatic color adjusting device, 203-action pane signal
205-target window signal, the 210-comparison means
213,215-comparator, 217, the 219-compare result signal
220-logic lock, 230-paints value calculation apparatus
The 233-subtracter, 235-multiplier, 237-adder
Embodiment
Please refer to Fig. 1, be the process step figure of the automatic color adjusting process of preferred embodiment of the present invention.At first, step 101 being on the plane coordinates of two reference axis with chroma signals Cb, Cr, is set up action pane and target window.Wherein target window is for dropping in this action pane.
Then, step 102 is imported the image data of an imaging point.And step 103 judges whether the chroma signals value of this imaging point drops between action pane and the target window in the position on this plane coordinates.If the chroma signals value of this imaging point drops between action pane and the target window, step 104 is then adjusted the chroma signals value of this imaging point according to target window.If this imaging point do not drop between action pane and the target window, step 105 is not then adjusted the chroma signals value of this imaging point.The formula of adjusting is as follows:
(Cba’，Cra’)＝(Cba，Cra)+Gain?x[(Cbb，Crb)-(Cba，Cra)]
Wherein, (Cba ', Cra ') be the adjusted chroma value of this imaging point coordinate; (Cba Cra) is the chroma value coordinate before adjusting; Gain is generally one less than 1 constant; And the coordinate of the reference point B on the target window be (Cbb, Crb), if because of the imaging point chroma value position that will adjust in the zone 1 of Fig. 5, then the point of the B among Fig. 5 position is:
Cbb＝Cbt+(Cra-Crt)/(Cba-Cbt)x?Crd2
Crb＝Crt+Crd2
Wherein, Crd2 is 1/2 length of side of square target window; (Cbt Crt) is the center point coordinate of target window.If the point of desire adjustment drops on the position in the zone 4 among Fig. 5, then:
Cbb＝Cbt+Crd2
Crb＝Crt+(Cra-Crt)/(Cba-Cbt)x?Crd2
When the adjustment point drops on other position, all can similarly calculate the corresponding reference point coordinates according to easy mathematics geometric ways.Certainly the disclosed concrete enforcement notion according to the present invention, any personage who is familiar with this technology can take other similar adjustment mode and obtains a preferable chroma value.The disclosed specific embodiment of the present invention is not to be used to limit protection scope of the present invention, and other similar method of adjustment all belongs to protection range of the present invention.
Please refer to Fig. 2, be the automatic color adjusting device schematic diagram of preferred embodiment of the present invention.This automatic color adjusting device 200 mainly includes comparison means 210, logic gate 220 and paints value calculation apparatus 230.Wherein, comparison means 210 is made up of comparator 213, comparator 215, paints value calculation apparatus 230 and is made up of subtracter 233, multiplier 235 and adder 237.
This automatic color adjusting device 200 is for utilizing the chroma signals Cb of the mode of window to a bit
In, Cr
InJudge and adjust, to obtain the new chroma signals Cb of this point
Out, Cr
OutWherein, automatic color adjusting device 200 by two comparators 213 and 215 of comparison means 210 respectively to chroma signals Cb
In, Cr
InCarry out the judgement of window area, with output compare result signal 217 and 219, and decision chroma signals Cb
In, Cr
InWhether drop between the action pane and target window zone that the user sets up.And as chroma signals Cb
In, Cr
InWhen dropping between action pane and the target window zone, then activate with control signal 225 and paint value calculation apparatus 230, with to chroma signals Cb by logic lock 220
In, Cr
InDo the gain adjustment of a vector mode, obtain new chroma signals Cb
Out, Cr
Out
Please refer to Fig. 3, Fig. 3 is the operation chart of the automatic color adjusting device of preferred embodiment of the present invention.At first, be taken at several somes defining operation window ((Cbd1 on the plane coordinates that Cb, Cr are two reference axis, Crd1), (Cbt1, and target window ((Cbd2 Crt1)), Crd2), (Cbt2, Crt2)), install 210 action pane signals that received 203 and target window signal 205 respectively as a comparison.And comparison means 210 can be set up the service area by action pane signal 203 and target window signal 205, just the zone between action pane and target window.
In preferred embodiment of the present invention, this target window can be square type or rhombus, and target window can drop on central authorities or other position in the action pane.Please refer to Fig. 4 A to Fig. 4 D, be the action pane of preferred embodiment of the present invention and the schematic diagram of target window.By Fig. 4 A to Fig. 4 D as can be known, though target window defines with two points on the coordinate, the shape of target window can be square type or rhombus, and the shape of action pane also can be square type or rhombus, and where target window is not limited to drop in the action pane.Therefore, the present invention can further the chroma signals value of each point in the zone in the action pane, outside the target window to the target window border, as adjustment.
Import the chroma signals Cb of any when comparison means 210
In, Cr
InAfter, can whether drop in the service area to judge this chroma signal value position on plane coordinates according to the relative position between its comparator 213,215 these points of judgement and action pane and target window.
If this point drop within the action pane (less than) and drop on outside the target window, when just this point drops on the service area in, can paint value calculation apparatus 230 by logic gate 220 activation this moment and carry out chroma signals Cb
In, Cr
InAdjustment.Wherein, receive chroma signals Cb with subtracter 233 as the desired value calculator
In, Cr
InAnd the target window signal, to calculate chroma signals Cb
In, Cr
InVector mode between the point coordinates position of its representative and the corresponding points of target window.
Please refer to Fig. 5, be the schematic diagram between the corresponding points of the point coordinates position of preferred embodiment of the present invention and target window.If chroma signals value Cb
In, Cr
InThe point coordinates of its representative represents with A, and in the action pane a bit with (Cbt, Crt) expression, the point on the corresponding target window of A point then, can according to A point and point (Cbt, Crt) intersection points B of line on target window decides, this B point is the corresponding points of A on target window.As for adjusting the chroma signals value Cb that A is ordered
In, Cr
In, then can define the chroma signals value Cb that A is ordered according to the user
In, Cr
InBe pulled to A ' the some chroma signal value on (B-A) vector, this A ' point promptly is the point after the A point repaints.
Also therefore, when desired value calculator 233 calculates (during the vector of B-A), can by with multiplier 235 as the yield value calculator will (B-A) be multiplied by the yield value (Gain) of gain signal 260 representatives, and the relational expression between A and A ' can be expressed as: A '=A+Gain* (B-A).
In preferred embodiment of the present invention, this yield value (Gain) can change to some extent according to the scope of action pane, please refer to Fig. 6, is the yield value of preferred embodiment of the present invention and the graph of a relation of action pane.In Fig. 6, yield value (Gain) can be according to action pane scope (scope 1, scope 2) and is different, and with linear function figure increasing or decreasing.In Fig. 6, the maximum of K representative gain, Gth then represent when yield value except with action pane with linear function figure increasing or decreasing, more according to Cbth1, Crth1, Cbth2, Crth2 equal segments point, and the turnover increasing or decreasing, this Gth is breakover point.
At last, by with adder 237 as the value of painting calculator, add that as A (computing of B-A) is to obtain new chroma signals value Cb for Gain*
Out, Cr
Out, this Cb
Out, Cr
OutChroma signals value for A ' point.
Comprehensively above-mentioned, the present invention proposes a kind of automatic color adjusting process and device, by the mode of defining operation window and target window, and these two service areas that window limited, go to be adjusted at the chroma signals value in the service area.By the present invention, the adjustment of chroma signals can be limited to according to certain a bit, but according to window, and can make the adjustment of chroma signals more suitable, its picture that presents does not have discontinuous, lofty phenomenon yet.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (18)
1. an automatic color adjusting process is characterized in that, comprising:
On a plane coordinates with first chroma signals and the second chroma signals place, set up an action pane and a target window, wherein this target window drops in this action pane;
Import imaging point data, judge its first chroma signals value of this imaging point and the second chroma signals value whether drop between this action pane and this target window in the position on this plane coordinates; And
If the position of this imaging point is to drop on the first chroma signals value and the second chroma signals value of then adjusting this imaging point between this action pane and this target window according to this target window.
2. automatic color adjusting process according to claim 1 is characterized in that, according to the relation between this imaging point position and this target window border, adjusts the first chroma signals value and the second chroma signals value of this imaging point.
3. automatic color adjusting process according to claim 2 is characterized in that, according to this imaging point and to the relation between should its both positions of the borderline point of target window, adjusts the first chroma signals value and the second chroma signals value of this imaging point.
4. automatic color adjusting process according to claim 3, it is characterized in that, this imaging point its to decision that should the borderline point of target window, can according in this imaging point and this target window a bit between a line, and the intersection point of this line and this target window decides.
5. automatic color adjusting process according to claim 3 is characterized in that, according to this imaging point and to the vector relations between should its both positions of the borderline point of target window, adjusts the first chroma signals value and the second chroma signals value of this imaging point.
6. automatic color adjusting process according to claim 5, it is characterized in that, if this imaging point is represented with A, this imaging point is to should target window is borderline representing with B, with A ' expression, then the relational expression between A ' and A can be expressed as after the first chroma signals value of this imaging point and the second chroma signals value adjustment:
A’＝A+Gain＊(B—A)
Wherein Gain is a gain coefficient.
7. automatic color adjusting process according to claim 6 is characterized in that, this gain coefficient can have different value according to this action pane.
8. automatic color adjusting process according to claim 6 is characterized in that, the relation between this gain coefficient and this action pane can be linear function.
9. automatic color adjusting process according to claim 8, wherein this linear function can divide section and have different slopes.
10. automatic color adjusting process according to claim 1 is characterized in that, this action pane is a rectangle or a rhombus.
11. automatic color adjusting process according to claim 1 is characterized in that, this target window is a rectangle or a rhombus.
12. automatic color adjusting process according to claim 10 is characterized in that, when this action pane is a rectangle, forms this rectangle with 2 positions of this plane coordinates.
13. automatic color adjusting process according to claim 1 is characterized in that, this target window is positioned at the central authorities of this action pane.
14. an automatic color adjusting device is characterized in that, comprising:
One comparison means receives an action pane signal, a target window signal, one first chroma signals and one second chroma signals, to export one first compare result signal and one second compare result signal;
One logic gate receives this first comparison signal and this second comparison signal to export a control signal; And
One paints value calculation apparatus, receives this first chroma signals, this second chroma signals and this control signal, to produce one the 3rd chroma signals and one the 4th chroma signals.
15. automatic color adjusting device according to claim 14 is characterized in that, this comparison means also comprises:
One first comparator receives this first chroma signals, this second chroma signals and this action pane signal, to export this first compare result signal; And
One second comparator receives this first chroma signals, this second chroma signals and this target window signal, to export this second compare result signal.
16. automatic color adjusting device according to claim 14 is characterized in that, this logic gate be one with the door.
17. automatic color adjusting device according to claim 14 is characterized in that, this logic gate is a NAND gate.
18. automatic color adjusting device according to claim 14 is characterized in that, this is painted value calculation apparatus and also comprises:
One subtracter receives this first chroma signals, this second chroma signals and this target window signal, to export a vector signal;
One multiplier receives this vector signal and a gain signal, to export a gain vector signal; And
One adder receives this first chroma signals, this second chroma signals and this gain vector signal, to export the 3rd chroma signals and the 4th chroma signals.
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| CNB2004100867592A CN100463532C (en) | 2004-11-01 | 2004-11-01 | Automatic color adjusting process and apparatus |
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| CNB2004100867592A CN100463532C (en) | 2004-11-01 | 2004-11-01 | Automatic color adjusting process and apparatus |
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| CN100463532C true CN100463532C (en) | 2009-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101466047B (en) * | 2007-12-21 | 2010-12-22 | 佛山普立华科技有限公司 | System and method for automatically correcting digital optical processing projector color |
| CN110737440B (en) * | 2019-10-22 | 2023-03-14 | 吉林工程技术师范学院 | Programming method based on DaVinci nostalgic color series digital color correction plug-in |
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| US5289295A (en) * | 1991-07-04 | 1994-02-22 | Matsushita Electric Industrial Co., Ltd. | Color adjustment apparatus |
| US6642957B1 (en) * | 1997-10-29 | 2003-11-04 | Sony Corporation | Color signal processing circuit, method of the same and a camera apparatus |
| CN1496132A (en) * | 2002-08-23 | 2004-05-12 | ���ǵ�����ʽ���� | Method for adjusting colour saturation using saturation control |
| CN1604657A (en) * | 2003-09-01 | 2005-04-06 | 三星电子株式会社 | Method and apparatus for adjusting colors of an image |
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- 2004-11-01 CN CNB2004100867592A patent/CN100463532C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5289295A (en) * | 1991-07-04 | 1994-02-22 | Matsushita Electric Industrial Co., Ltd. | Color adjustment apparatus |
| US6642957B1 (en) * | 1997-10-29 | 2003-11-04 | Sony Corporation | Color signal processing circuit, method of the same and a camera apparatus |
| CN1496132A (en) * | 2002-08-23 | 2004-05-12 | ���ǵ�����ʽ���� | Method for adjusting colour saturation using saturation control |
| CN1604657A (en) * | 2003-09-01 | 2005-04-06 | 三星电子株式会社 | Method and apparatus for adjusting colors of an image |
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Effective date of registration: 20200410 Address after: No.1, Duhang 1st Road, Hsinchu City, Hsinchu Science Park, Taiwan, China Patentee after: MEDIATEK Inc. Address before: Hsinchu County, Taiwan, China Patentee before: MStar Semiconductor, Inc. |