CN101521827A - System and method for automatically adjusting cross-color artifact inhibition threshold - Google Patents
System and method for automatically adjusting cross-color artifact inhibition threshold Download PDFInfo
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- CN101521827A CN101521827A CN200810082312A CN200810082312A CN101521827A CN 101521827 A CN101521827 A CN 101521827A CN 200810082312 A CN200810082312 A CN 200810082312A CN 200810082312 A CN200810082312 A CN 200810082312A CN 101521827 A CN101521827 A CN 101521827A
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Abstract
The invention provides a system and a method for automatically adjusting a cross-color artifact inhibition threshold. The system comprises a cross-color artifact inhibition unit, a statistical unit and an adjusting unit, wherein the cross-color artifact inhibition unit receives an input image data and searches for a plurality of cross-color artifact points of the input image data, judges whether the cross-color artifact points are static or dynamic according to a threshold, and then inhibits the static cross-color artifact points so as to output an output image data. In the adjusting method, the statistical unit counts the cross-color quantity of the inhibited output image data, then the adjusting unit compares the cross-color quantity of the output image data according to a reference value, and then transmits an adjusting signal to the cross-color artifact inhibition unit so as to adjust the cross-color artifact inhibition threshold.
Description
Technical field
The present invention is relevant for a kind of Adjustment System and method, particularly a kind of system and method for automatic adjustment cross-color artifact inhibition threshold.
Background technology
General display received input signal synthetic brightness (Luminance) and chroma (Chrominance) arranged, existing input signal be with brightness and chroma combination on a carrier wave, behind the display receiving inputted signal, direct earlier separately brightness and chroma also are shown on the display.But when brightness and chroma combination together the time, the part carrier wave can can't separate really because overlap, therefore display also just can't reduce brightness and chroma really, handle and formation film color (Cross-Color Artifact) and make brightness be taken as chroma, therefore reduce the image quality of the shown picture of display, and influence the vision impression.
Display suppresses before the film color phenomenon now, and meeting judges that earlier the film color point of input image data is dynamic or static usually, and it is because as if after dynamic film color point is suppressed, make output image produce fragmentation or site (side-effect) phenomenon easily.Judge that now film color point is dynamic or static mode, determine dynamically and static boundary by defining a threshold value, and utilize the film color point of this threshold value and input image data to compare, to judge that film color point for dynamic or static, so just can effectively suppress other fragmentation or site (side-effect) that film color point can not cause output image data again.But unfortunately, often one group of threshold value can't remove to tackle various front-end circuits, similarly be Video CD player (Digital Video DiscPlayer, DVD Player) or picture decoder (Video Decoder) etc., itself because above-mentioned various front-end circuits in order to handle needs, and on view data, done other processing, cause film color to suppress circuit and one of preset and to organize threshold value and can't be applicable to different input image datas, and then can't suppress the film color phenomenon of input image data effectively.
In sum, film color suppresses circuit in order effectively to suppress the film color phenomenon, be still and run into the influence that front end circuit is handled, and it is previous pre-if the threshold value of adjusting can't produce the film color inhibition effect of expection to cause film color to suppress circuit, therefore the user just must readjust threshold value, and suppress the film color phenomenon of input image data at that time, so both expended time in and lacked efficient.
Therefore, the present invention is directed to the problems referred to above and propose the system and method that a kind of novelty is adjusted cross-color artifact inhibition threshold automatically, it uses a judgment mechanism, and can adjust threshold value automatically, with effective inhibition film color phenomenon.
Summary of the invention
One of purpose of the present invention is to provide a kind of system and method for automatic adjustment cross-color artifact inhibition threshold, and it is according to the remaining film color amount of view data after suppressing through film color, and adjusts threshold value automatically, and then effectively suppresses the film color phenomenon of view data at that time.
One of purpose of the present invention, be to provide a kind of system and method for automatic adjustment cross-color artifact inhibition threshold, when it changed in the view data scene, reset threshold was an initial value, to avoid suppressing dynamic film color point fragmentation or site phenomenon taking place, so can effectively suppress the film color phenomenon.
The system of automatic adjustment cross-color artifact inhibition threshold of the present invention, it mainly comprises a film color and suppresses unit, a statistics unit and an adjustment unit, film color suppresses a plurality of film color points that the unit is used to receive an input image data and seeks this input image data, and for static or dynamically, produce an output image data with the film color point that suppresses static state according to one of the static or dynamic threshold decision film color point of definition.This output image data after method of adjustment of the present invention is suppressed by the statistic unit reception, and the film color amount of the output image data after statistics suppresses, the film color amount of being added up by adjustment unit receiving and counting unit and according to reference value film color amount relatively afterwards, and then correspondingly transmit one and adjust signal to film color and suppress the unit to adjust threshold value.
In addition, system of the present invention more comprises a reset cell, it detects input image data, and whether scene changes (scene change), if then transmitting a reset signal to film color when changing, the view data scene suppresses the unit, with this threshold value of resetting is initial value, and avoids suppressing dynamic film color point and generation fragmentation or site phenomenon.
Description of drawings
Fig. 1 is the calcspar of one of the present invention preferred embodiment; And
Fig. 2 is the flow chart for one of the present invention preferred embodiment.
Embodiment
Further understand and understanding for architectural feature of the present invention and the effect reached are had, preferred embodiment is provided and cooperates detailed explanation, as follows:
See also first figure, it is the calcspar of one of the present invention preferred embodiment.As shown in the figure, the thresholding system that the automatic adjustment film color of present embodiment suppresses, it comprises a film color and suppresses unit 10, a statistics unit 12 and an adjustment unit 14.Film color suppresses unit 10 in order to receive an input image data and to seek all a plurality of film color points of input image data, wherein film color suppresses unit 10 employing field (Field), frame (Frame) or straight line (line) searching modes, seeks all film color points of input image data.Owing to the mode of the film color point of seeking input image data now is numerous, above-mentioned only is that general introduction present embodiment film color suppresses the part execution mode that unit 10 is adopted.
In addition, film color suppresses to be preset with a threshold value in the unit 10, and it is the dynamic and static boundary of film color point, and film color inhibition unit 10 is static state or dynamic according to the film color point of this threshold decision input image data.Film color of the present invention suppresses one of unit 10 preferred embodiment employing summation absolute error, and (Sum ofAbsolute Difference, mode SAD) judges that film color point is static or dynamically, so threshold value is a summation absolute error threshold value.Film color suppresses unit 10 and confirms promptly can suppress static film color point after which film color point is for static state, and produce an output image data, one of the present invention preferred embodiment utilizes a Three-Dimensional Dynamic comb filter (3D Comb Filter) that static film color point is suppressed to handle.
Consult first figure again, statistic unit 12 is used to receive output image data, and the film color amount of statistics output image data promptly is the quantity of film color point, can learn that so film color suppresses unit 10 and according to preset threshold value input image data carried out the remaining film color amount in film color inhibition back.Adjustment unit 14 has one of default reference value, this reference value can be accepted input picture by the definition beholder and be had the film color amount, that is to say if when suppressing unit 10 film colors and suppress the still remaining film color amount of this output image data that the back produced less than reference value through film color, promptly represent the inhibition film color effect of film color inhibition unit 10 good, comparatively speaking, if the still remaining film color amount of output image data is during greater than reference value, promptly represent film color to suppress the inhibition film color poor effect of unit 10, this situation represents that further film color suppresses unit 10 default threshold values and is not suitable for the input image data that is sent to film color inhibition unit 10 now, so must adjust threshold value.
The film color amount of output image data is promptly compared in one of the present invention preferred embodiment according to this reference value by adjustment unit 14, and learn that film color suppresses the inhibition effect of unit 10, if the promptly corresponding transmission one of inhibition film color poor effect is adjusted signal to film color inhibition unit 10,, film color adjusts this threshold value automatically so that suppressing unit 10.Film color of the present invention suppresses unit 10 and adjusts one of threshold values better embodiment automatically for default one fixing adjusted value, after film color suppresses unit 10 every receptions adjustment signals, promptly according to this fixedly adjusted value adjust threshold value automatically; Perhaps much default group threshold values, film color suppress unit 10 every receptions adjust signals after, promptly select not threshold value on the same group automatically in regular turn for use and adjust threshold value automatically, the reference value of above-mentioned adjustment unit 14 can freely be adjusted for the user.From the above, the remaining film color amount of output image data after the system of present embodiment can suppress according to the process film color, and adjust threshold value automatically, and then effectively suppress the film color phenomenon of view data at that time.
In addition, suppressing the unit 10 previous threshold values of adjusting for fear of film color can make film color suppress the unit dynamic film color point of 10 judgements for static, so the system of another preferred embodiment of the present invention more is provided with a reset cell 16, whether be used to detect input image data has scene to change (scene change), if then transmitting a reset signal to film color when changing, the input image data scene suppresses unit 10, so that film color suppresses unit 10 reset threshold is initial value, so can avoid film color to suppress unit 10 and suppress dynamic film color point according to the previous threshold value of adjusting fragmentation or site phenomenon take place, so can suppress the film color phenomenon really and improve the inhibition film color effect of the film color inhibition unit 10 of present embodiment.Because the mode that whether known used detection input image data is scene changes is a lot of, so no longer add detailed description at this.
Moreover, the system of present embodiment can be applicable to picture decoder (Video Decoder), control device of the tv (TV Controller) or dynamic image compression standard decoder devices such as (Moving Picture Experts GroupDecoder, MPEG Decoder).
See also second figure, it is the flow chart of one of the present invention preferred embodiment.As shown in the figure, when input image data transfers to film color when suppressing unit 10, execution in step S10 at first seeks a plurality of film color points of input image data, this step can adopt field (Field), frame (Frame) or straight line (line) searching mode, to seek the film color point of input image data; Then, execution in step S12 is static or dynamic according to threshold decision film color point, and it can adopt the mode of summation absolute error to judge film color point for static or dynamic, and threshold value is summation absolute error threshold value; Subsequently, follow execution in step S14 again, the film color point that suppresses static state is to produce output image data, and this step can adopt a Three-Dimensional Dynamic comb shape filtering (3D Comb Filter) mode to suppress static film color point.
Next execution in step S16 adds up the film color amount via the output image data behind the inhibition film color, promptly is the quantity of film color point; Next execution in step S18 again, relatively the film color amount of output image data is to adjust threshold value according to reference value, and this step judges whether the film color amount of output image data meets reference value, does not then adjust threshold value if meet, and does not then adjust threshold value as if meeting.The film color amount of the view data after present embodiment suppresses according to the process film color from the above, and adjust threshold value automatically, so can effectively suppress the film color phenomenon of input image data at that time.In addition, whether scene changes more can to detect input image data in step S10, and this threshold value is an initial value if the input image data scene was then reset when changing.
In sum, adjust the system of cross-color artifact inhibition threshold automatically, it comprises that film color suppresses unit, statistic unit and adjustment unit.Automatically the method for adjusting the threshold value of film color inhibition suppresses a plurality of film color points that input image data is sought in the unit by film color, and be static state or dynamic according to threshold decision film color point, to suppress static film color point and then to produce output image data, add up the film color amount of output image data again by statistic unit, promptly be the quantity of film color point, afterwards by adjustment unit according to reference value, the film color amount that compares output image data, and then corresponding adjustment signal to the film color that transmits suppresses the unit to adjust this threshold value, so can adjust threshold value automatically, and then effectively suppress the film color phenomenon of view data at that time.
Above-mentioned only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, the equivalence of in the present patent application claim and spirit shape, structure, feature being carried out changes and modifies, and all should be included in the claim of the present invention.
Claims (10)
1. method of automatically adjusting cross-color artifact inhibition threshold comprises step:
Seek a plurality of film color points of an input image data;
According to a threshold value, judge that those film color points are for static or dynamic;
Suppress those static film color points, produce an output image data;
Add up one of this output image data film color amount; And
According to a reference value, this film color amount of this output image data relatively, and corresponding this threshold value of adjusting.
2. the method for claim 1 wherein also comprises:
Whether scene changes to detect this input image data, and this threshold value is an initial value if this input image data scene was then reset when changing.
3. the method for claim 1 wherein according to a threshold value, judges that those film color points are static or dynamic step, adopts the mode of summation absolute error, and this threshold value is a summation absolute error threshold value.
4. the method for claim 1, wherein this method be applied to picture decoder, control device of the tv and dynamic image compression standard decoder at least one of them.
5. the method for claim 1 is wherein sought the step of those film color points of an input image data, adopt field, frame and straight line seek mode at least one of them.
6. system that automatically adjusts the threshold value that film color suppresses, it comprises:
One film color suppresses the unit, receive an input image data and seek a plurality of film color points of this input image data, and according to those film color points of a threshold decision for static or dynamically, and suppress those film color points of static state, and then produce an output image data;
One statistics unit receives this output image data, adds up one of this output image data film color amount; And
One adjustment unit receives this film color amount that this statistic unit adds up and according to a reference value this film color amount relatively, and then correspondingly transmits one and adjust signal to this film color and suppress unit to adjust this threshold value.
7. system as claimed in claim 6, wherein this system also comprises:
One reset cell, whether scene changes to detect this input image data, suppresses the unit if this input image data scene then passes a reset signal to this film color when changing, and is initial value with this threshold value of resetting.
8. system as claimed in claim 6, wherein this film color inhibition unit adopts the mode of summation absolute error to judge those film color points for static or dynamic, and this threshold value is a summation absolute error threshold value.
9. system as claimed in claim 6, wherein this system applies in picture decoder, control device of the tv and dynamic image compression standard decoder at least one of them.
10. system as claimed in claim 6, wherein this film color suppresses unit employing field, frame or straight line searching mode, seeks those film color points of this input image data.
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| CN2008100823126A CN101521827B (en) | 2008-02-29 | 2008-02-29 | System and method for automatically adjusting cross-color artifact inhibition threshold |
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| CN2008100823126A CN101521827B (en) | 2008-02-29 | 2008-02-29 | System and method for automatically adjusting cross-color artifact inhibition threshold |
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| CN101521827A true CN101521827A (en) | 2009-09-02 |
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| US5097322A (en) * | 1990-08-20 | 1992-03-17 | The Grass Valley Group, Inc. | Video encoding using adaptive filters and variable threshold |
| JP2005057508A (en) * | 2003-08-05 | 2005-03-03 | Matsushita Electric Ind Co Ltd | Apparatus and method for movement detection, apparatus and method for luminance signal/color signal separation, apparatus and method for noise reduction, and apparatus and method for video display |
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