CN100534205C - Method for suppressing error image colour - Google Patents
Method for suppressing error image colour Download PDFInfo
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- CN100534205C CN100534205C CNB2004100904820A CN200410090482A CN100534205C CN 100534205 C CN100534205 C CN 100534205C CN B2004100904820 A CNB2004100904820 A CN B2004100904820A CN 200410090482 A CN200410090482 A CN 200410090482A CN 100534205 C CN100534205 C CN 100534205C
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Abstract
A method for suppressing error image color includes recording generation mode of the first pixel value corresponding to the object position in a last output frame corresponding to the second field, utilizing pixel value of a reference pixel to calibrate pixel value of pixel located at the object position in object frame if the first pixel value is generated by applying interfiled interpolation mode.
Description
Technical field
The present invention relates to a kind of method for processing video frequency, design a kind of method that reduces the image colour contamination especially.
Background technology
General TV signal (as the signal of NTSC specification or the signal of PAL specification) is synthesized by brightness (Luninance) signal and colourity (Chrominance) signal.Generally speaking, TV signal is that brightness and colourity are coincided on a carrier wave, after TV is collected mail, luminance signal can be separated with carrier chrominance signal, so that be shown on the screen.
In case luminance signal is separated with carrier chrominance signal not exclusively, cause luminance signal to sneak into carrier chrominance signal (cross-color) easily, or carrier chrominance signal sneaks into the situation of luminance signal (cross-luminance), makes wrong color of image flaws such as (false color artifact) to occur on the picture.
Be used for suppressing the method for error image colour in the prior art, need carry out the step of image detection earlier and judge whether image is static (still, or stationary) should use which kind of compensation way that the effect that suppresses error image colour is done maximum performance with decision, so not only need many computing energy, also need extra storage area to store view data required in the deterministic process.
Summary of the invention
Therefore, one of purpose of the present invention promptly is to provide a kind of method that suppresses error image colour.
A kind of method that suppresses error image colour is provided in the embodiments of the invention, be used in the process of deinterleave one video data, proofread and correct the pixel value of the pixel of a target location in the target frame of being exported, this video data includes adjacent in regular turn one first, one second and one the 3rd, and wherein this target frame is corresponding to the 3rd.This method includes: in record and this second the corresponding last output frame, to the producing method of one first pixel value that should the target location; And, utilize the pixel value of a reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame if this first pixel value is to produce in interpolation mode between.
A kind of method that suppresses error image colour is provided in the embodiments of the invention in addition, be used for proofreading and correct the pixel value of the pixel of a target location in the target frame that is produced according to a video data, this video data includes adjacent in regular turn one first, one second and one the 3rd, wherein this target frame is corresponding to the 3rd, this method includes: produce with this second a corresponding output frame in, to one first pixel value that should the target location; And, utilize the pixel value of a reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame if this first pixel value is to produce in interpolation mode between.
Embodiments of the invention also provide a kind of image processing method, and it includes a video data is carried out a deinterleave computing, with at each location of pixels to be calculated, chooses one and calculate corresponding pixel value in multiple pixel value producing method; At each location of pixels to be calculated, store selected pixel value producing method; And according to stored pixel producing method, whether decision carries out error image colour to the corresponding pixel value that is calculated is suppressed computing.
One of advantage of the present invention is not need to carry out extra pixel detection, can significantly reduce required computing energy.
Another advantage of the present invention is only to need the storage area of minute quantity to store pixel producing method in the output frame, can further save the cost of hardware.
Description of drawings
Fig. 1 includes a video data of four opposite fields and the schematic diagram of corresponding two output frames.
Fig. 2 proofreaies and correct the flow chart of the pixel value of a target location in the frame for the present invention.
The reference numeral explanation
100: video data
110,120,130,140:
150,160: output frame
112、114、116、122、124、126、132、
134、136、142、144、146、152、153、
154、155、156、162、163、164、165、
166: scanning linear
12,14,16: location of pixels
Embodiment
Please refer to Fig. 1, its illustrate is the video data 100 that includes four opposite fields (field) schematic diagram with corresponding two output frames (frame) 150 and 160. Output frame 150 and 160 behind the deinterleave is to correspond respectively to time T-1 and time T, and four opposite fields 110,120,130 and 140 in the video data 100 are to correspond respectively to time T-2, T-1, T and T+1.In Fig. 1, scanning linear 112,122,132 and 142 is respectively the N-1 bar scanning linear in the field 110,120,130 and 140; Scanning linear 114,124,134 and 144 is respectively the N bar scanning linear in the field 110,120,130 and 140; Scanning linear 116,126,136 and 146 then is respectively the N+1 bar scanning linear in the field 110,120,130 and 140.
Following alleged pixel value in the explanation can be the brightness value (luminance) or the chromatic value (chrominance) of pixel on real the work.
Yet, 120 and 130 scan online pixel, might have aforesaid error image colour (false color).Therefore, the method of the disclosed reduction image of embodiments of the invention colour contamination, can utilize the result of the detection of being carried out in the mobile adaptable deinterlacing process, the pixel value of the scanning linear in the output frame is proofreaied and correct, to reduce the flaw that error image colour was caused.Please note, the method of the described inhibition error image colour of embodiments of the invention is applicable in various mobile adaptable deinterlacingizations (motion adaptive de-interlacing) or motion compensation deinterleaveization (motioncompensation de-interlacing) process.
Deinterleave process with the pixel value of a position 16 in the generation frame 160 is an example, and whether near the images the deinterleave computing meeting detection position 16 are static (still).If near the images the position 16 are static, then can utilize in 120 and 140, the pixel value of the pixel of correspondence position 16 produces the pixel value of position 16 in the frame 160 in the mode of interpolation between the field (inter-field interpolation).Otherwise if near the image the position 16 is dynamic, then general de-interlacing methods can utilize the pixel value of the pixel of field 130, and the mode of mending (intra-field interpolation) with interpolation field produces the pixel value of position 16 in the frame 160.That is to say that according near the stationary condition of the image the detection position 16, the deinterleave computing can be selected two kinds of deinterleave pixel value producing methods: produce this pixel value between one of in the middle of interpolation and the interpolation field reinforcing method.
In case the mode of interpolation produced the pixel value of position 16 in the frame 160 between deinterlace algorithm decision utilized, i.e. in the expression 120 in the pixel value of position 16 and 140 pixel value of position 16 very approaching.Based on this dot characteristics, then only need utilize the result's (promptly adopting which kind of pixel value producing method) of detection for it of aforementioned deinterleave process institute, and need not carry out other extra detection, can judge whether the image of an ad-hoc location is static.Below will with the flow chart mode illustrate one embodiment of the invention the inhibition error image colour method how according in the deinterleave process the result that detects for it, come the pixel value of a target location 14 in the correct frames 160.
Fig. 2 illustrate is flow process Figure 200 of the pixel value of target location 14 in the method correct frames 160 of the inhibition error image colour of one embodiment of the invention.Division is as follows now for each step that it comprised:
In step 202, the method for the inhibition error image colour of present embodiment can be in the deinterleave process, the producing method of one first pixel value corresponding with target location 14 in the record frame 150.For example, if this first pixel value of corresponding target location 14 is to produce in interpolation between the field (inter-fieldinterpolation) mode in the frame 150, record in step 202 then " 1 " think expression.Otherwise,, then write down if this first pixel value is not to produce in interpolation mode between the field " and 0 " as expression.On real the work, above-mentioned record value can be recorded in the buffer (buffer).
Similarly, in producing the process of frame 160, the method for the inhibition error image colour of present embodiment can carry out step 204, will be recorded in this buffer with the producing method of a position 12 corresponding one second pixel values in the frame 160.In the present embodiment, if this second pixel value is to produce in interpolation mode between the field, then write down equally " 1 " as expression; Otherwise, then in step 204, write down " and 0 ".
In step 206, the method for the inhibition error image colour of present embodiment can be recorded in the producing method of one the 3rd pixel value of a corresponding position 16 in the frame 160 in the aforesaid buffer.
Therefore, in step 208, according to the value that abovementioned steps write down, the method for the inhibition error image colour of present embodiment can judge whether to suppress the pixel value that is positioned at the pixel of target location 14 in the frame 160 correction of error image colour.For example, if position 12 and this second, third pixel value three of 16 in this first pixel value of target location 14, the frame 160 in the frame 150 all are to produce in interpolation mode between the field, then near the images the decidable target location 14 can be considered to be static.Therefore, if video data 100 is the NTSC form, then the method for the inhibition error image colour of present embodiment just can be utilized the correction that a pixel value of corresponding target location 14 in the field 110 comes the pixel value of target location 14 in the frame 160 is suppressed error image colour.Error image colour suppresses computing, comprise luminance signal and sneak into the inhibition computing of carrier chrominance signal (cross-color) and the inhibition computing that carrier chrominance signal is sneaked into luminance signal (cross-luminance), be those who familiarize themselves with the technology and extensively know and know, so do not give unnecessary details.
Note that position 12 and 16 does not limit need and be positioned at same vertical direction with target location 14.In addition, position 12 does not also limit must be positioned at target location 14 last and scans online.In like manner, position 16 does not limit yet and will be positioned at back one of target location 14 and scan online.Even, also can carry out the judgement of step 208 on real the work according to more multipoint pixel value producing method.
In addition, as previously mentioned, if this first pixel value of corresponding target location 14 is to produce in interpolation mode between the field in the frame 150, in the expression 110 in the pixel value of target location and 130 pixel value of target location 14 very approaching.Therefore, also can be only on real the work according to the producing method of this first pixel value of corresponding target location 14 in the frame 150, judge whether the pixel value of target location 14 in the correct frames 160.
In addition, though the above embodiments are the application that are described in the NTSC system, those who familiarize themselves with the technology should understand, and the method for inhibition error image colour of the present invention also can be applicable in the middle of other television system (for example PAL system).With the PAL system is example, judges that when aforementioned method can carry out error image colour suppresses computing, and then in the field of preceding 2 time points of utilization field 110, the pixel value of correspondence position 14 comes the pixel value of target location 14 in the correct frames 160.
From the above, the method of the described inhibition error image colour of embodiments of the invention only needs the result according to the detection of being carried out in the deinterleave process, and need not carry out other detection, can judge whether near the image the target location 14 is static, significantly saves required computing energy.Simultaneously, whether the present invention only needs recording pixel according to a particular pixel values producing method (interpolation mode between the field among the embodiment as described above), so required temporary data volume is few, can effectively reduce the cost of hardware.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (12)
1. method that suppresses error image colour, be used in the process of deinterleave one video data, proofread and correct the pixel value of the pixel of a target location in the target frame of being exported, this video data includes adjacent in regular turn one first, one second and one the 3rd, wherein, this target frame is that this method includes corresponding to the 3rd:
(a) in record and this second the corresponding last output frame, to the producing method of one first pixel value that should the target location; And
(b) if this first pixel value is to produce in interpolation mode between, utilize the pixel value of a reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
The method of claim 1, wherein the 3rd be corresponding to time T, this first is corresponding to time T-2, and this reference pixel is one this target location that is arranged in corresponding time T-4.
3. the method for claim 1, it includes in addition:
Write down in this target frame the producing method of one second pixel value of a corresponding second place;
Wherein, one scanning linear at this second place place is to be positioned at before the scanning linear at this place, target location, and when this second pixel value be with one between interpolation mode when producing, step (b) just allows to utilize the pixel value of this reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
4. method as claimed in claim 3, it includes in addition:
Write down in this target frame the producing method of one the 3rd pixel value of corresponding one the 3rd position;
Wherein, one scanning linear at place, the 3rd position is to be positioned at after the scanning linear at this place, target location, and when the 3rd pixel value be with one between interpolation mode when producing, step (b) just allows to utilize the pixel value of this reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
5. method that suppresses error image colour, be used for proofreading and correct the pixel value of the pixel of a target location in the target frame that is produced according to a video data, this video data includes adjacent in regular turn one first, one second and one the 3rd, wherein, this target frame is that this method includes corresponding to the 3rd:
(a) produce with this second a corresponding output frame in, to one first pixel value that should the target location; And
(b) if this first pixel value is to produce in interpolation mode between, utilize the pixel value of a reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
6. method as claimed in claim 5, wherein, the 3rd is corresponding to time T, this first is corresponding to time T-2, and this reference pixel is one this target location that is arranged in corresponding time T-4.
7. method as claimed in claim 5, it includes in addition:
Produce in this target frame one second pixel value of a corresponding second place;
Wherein, one scanning linear at this second place place is to be positioned at before the scanning linear at this place, target location, and when this second pixel value be with one between interpolation mode when producing, step (b) just allows to utilize the pixel value of this reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
8. method as claimed in claim 7, it includes in addition:
Produce in this target frame one the 3rd pixel value of corresponding one the 3rd position;
Wherein, one scanning linear at place, the 3rd position is to be positioned at after the scanning linear at this place, target location, and when the 3rd pixel value be with one between interpolation mode when producing, step (b) just allows to utilize the pixel value of this reference pixel to proofread and correct the pixel value that is positioned at the pixel of this target location in this target frame.
9. method as claimed in claim 5, wherein, this target frame is to move the adaptable deinterlacing method according to one to produce.
10. image processing method, it includes:
One video data is carried out a deinterleave computing,, in multiple pixel value producing method, choose one and calculate corresponding pixel value with at each location of pixels to be calculated;
At each location of pixels to be calculated, store selected pixel value producing method; And
According to stored pixel value producing method, whether decision carries out error image colour to the corresponding pixel value that is calculated is suppressed computing.
11. method as claimed in claim 10, wherein, those multiple pixel value producing methods include interpolation and interpolation field reinforcing method between the field.
12. method as claimed in claim 10, wherein, this error image colour suppresses computing and includes the inhibition computing that luminance signal is sneaked into carrier chrominance signal, and/or carrier chrominance signal is sneaked into the inhibition computing of luminance signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100904820A CN100534205C (en) | 2004-11-10 | 2004-11-10 | Method for suppressing error image colour |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100904820A CN100534205C (en) | 2004-11-10 | 2004-11-10 | Method for suppressing error image colour |
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| CN1774079A CN1774079A (en) | 2006-05-17 |
| CN100534205C true CN100534205C (en) | 2009-08-26 |
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| TW200820799A (en) | 2006-10-18 | 2008-05-01 | Realtek Semiconductor Corp | Method and apparatus for restraining error image colors |
| CN101312490B (en) * | 2007-05-22 | 2010-04-21 | 晨星半导体股份有限公司 | Pixel interpolation devices and methods therefor |
| CN101521761B (en) * | 2008-02-26 | 2011-03-30 | 瑞昱半导体股份有限公司 | Method and device for deinterlacing video by utilizing horizontal shift prediction and compensation |
| CN101527862B (en) * | 2008-03-06 | 2011-04-20 | 瑞昱半导体股份有限公司 | Method for suppressing image color error and device thereof |
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