CN102622725A - Multiple-display-mode-supporting blue enhancement processing - Google Patents
Multiple-display-mode-supporting blue enhancement processing Download PDFInfo
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- CN102622725A CN102622725A CN2011100299607A CN201110029960A CN102622725A CN 102622725 A CN102622725 A CN 102622725A CN 2011100299607 A CN2011100299607 A CN 2011100299607A CN 201110029960 A CN201110029960 A CN 201110029960A CN 102622725 A CN102622725 A CN 102622725A
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Abstract
The invention belongs to the field of digital image processing. According to the invention, blue areas of the sky and water in a digital image are determined by setting the scopes of Cb and Cr, and on that basis, a different enhancement on the blue areas according to different values of Y is carried out, so that people feel more comfortable when observing. The blue enhancement processing provided by the invention can be applied to multiple display modes, such as SCTV, HDTV, LCD, and the like, and have high flexibility and compatibility.
Description
One. technical field
Patent of the present invention belongs to Digital Image Processing, Flame Image Process integrated circuit, Digital Image Processing algorithm field; Blueness to the sky in the digital picture and the water surface etc. is handled; Thereby make the blueness of sky and water surface in the digital picture etc. seem more comfortable, be convenient to the analysis of people digital picture.This patent is not limited to a certain image display pattern, and it has higher flexibility and compatibility applicable to multiple demonstrations such as SDTV, HDTV, PC, LCD.
Two. background technology
Continuous development along with IC industry; On a large scale, the manufacturing of VLSI (very large scale integrated circuits) is increasingly mature; Its price was but in continuous reduction when chip functions became from strength to strength, thereby made all kinds of consumption electronic products such as DC (digital camera), DV (DV); PC (PC) is universal day by day, causes people also improving constantly for the quality requirements of digital picture.
Many times, because the influence of factors such as weather, exposure, individual skill level, there is variety of issue in blue regions such as the sky and the water surface in the digital picture that people obtain after photography or shooting.People need a kind of post-processed means in order to remedy the deficiency in early stage, feel more comfortable when making the blueness in people zone such as the sky and the water surface in to digital picture observe, and the better effects if that image seems is accepted by people more easily.
Three. summary of the invention
This patent is mainly used in the enhancing of the blue region of the sky and the water surface etc. in the digital picture.We are used for confirming that through the scope of setting Cb and Cr the image two ways is our required zone of carrying out blue enhancing; According to Y blue region is carried out enhancing in various degree then; It mainly is the Y value that increases low brightness area; Generally only carry out trickle adjustment for highlight regions, this is because for sky, and the blueness of high-brightness region often has white clouds near it and exists; For guaranteeing that the color of blue region is strengthened the influence that can not cause white clouds isochrome coloured silk, the variation in day outage sapphirine zone should not be too big.
This patent has at first been confirmed the scope of the Cb and the Cr of required enhancing blue region, then the Cb and the Cr value of input data is judged, drops in the blue spectrum of required enhancing if find the Cb and the Cr value of input data; Then further read its Y value, find the pairing Y value of these group input data, Cb value and the pairing output data of Cr value; According to the corresponding relation of these input and output; Completion reaches the purpose to blue region figure image intensifying to the input operation of data, otherwise if Cb and the Cr value of input data not in the blue spectrum of required enhancing; Then the input data are left intact, output data equals to import data.
Because the blueness of the non-sky such as clothes and the water surface is not belonged to the adjustment region of this patent, find that through observing the back with respect to the blueness of clothes etc., the Cb value of the blueness of the sky and the water surface is bigger.The Cb of this patent blueness is set to [150,200], and Cr is set to [60,125], and Y is not adjusted to avoid the big distortion of image greater than 209 blue region.
Four. description of drawings
Fig. 1 is the blue schematic block diagram that strengthens, and wherein y_in, cb_in, cr_in, de_in, vsync_in, hsync_in are input signal, and y_out, cb_out, cr_out, de_out, vsync_out, hsync_out are the output signal.
Fig. 2 is the blue sequential chart that strengthens, and the output signal is a clk with respect to the time delay of input signal.
The corresponding Y increment of the different Y values of Fig. 3.
The corresponding Cb increment of the different Y values of Fig. 4.
The corresponding Cr increment of the different Y values of Fig. 5.
Five. embodiment
This patent has a control signal and is used to control the color enhancing of whether carrying out image.When control signal is a high level, control signal is effective, and the color that carries out image strengthens, and this moment is if the Cb value of pixel drops in [150,200] interval, and Cr value drops in [60,125] interval, and then this pixel is pixel object that need processing.According to different Y values pixel is adjusted again: when the Y value greater than 209 pixels, output data equals to import data.Although (this pixel still belongs to the blue region object of detected required processing; But because of it has belonged to highlight regions; If this pixel is done big change process, make this pixel and near pixel have sudden change easily, make image produce comparatively significantly profile); For the Y value smaller or equal to 209 pixel, according to the corresponding one group of incremental data of per 10 gray levels, wherein the increment size of Cb by 20 less gradually be 0, the increment size of Y by-1 increase to+6, the increment of Cr increases to 0 by-10.The increment variation of each component specifically sees table.
The implementation of this patent can be to realize as adopt FPGA or make ASIC through hardware, also can realize as write c program through software approach, no matter adopt above which kind of mode all to belong to scope.
This patent is not limited to the enhancing of the blue region of the sky and the water surface, differentiates Cb and the Cr value that blue region is used through changing, and we can carry out enhancement process to blue regions such as clothes with this patent equally; Being used for the corresponding relation of the blue input and output that strengthen in addition neither be unique; So for the adjusting trend of high eight-bit data or for Y, Cb, the incremental adjustments trend of Cr is identical with this patent or just change the Cb that is used for definite blue spectrum; The Cr value; And to Y, Cb, the adjusting trend of Cr parameter is still identical with this patent all belongs to scope.The suspension points at Y row place is represented the increase successively of Y value, Δ Y, and Δ Cb, the suspension points of Δ Cr row is represented corresponding Δ Y, Δ Cb, the increment of Δ Cr is identical with the suspension points lastrow.
This patent adopts the mode of look-up table when being used for realization figure image intensifying, promptly drop on the pixel in the enhancement region for each, can search out one group of corresponding increments of change value according to its Y value.
| Y | ΔY | ΔCb | ΔCr |
| 0 | -1 | 20 | 10 |
| … | … | … | … |
| 4 | -1 | 20 | 10 |
| 5 | -1 | 20 | 10 |
| … | … | … | … |
| 9 | -1 | 20 | 10 |
| 10 | -1 | 19 | 10 |
| … | … | … | … |
| 14 | -1 | 19 | 10 |
| 15 | -1 | 19 | 10 |
| … | … | … | … |
| 19 | -1 | 19 | 10 |
| 20 | 0 | 18 | -9 |
| … | … | … | … |
| 24 | 0 | 18 | -9 |
| 25 | 0 | 18 | -9 |
| … | … | … | … |
| 29 | 0 | 18 | -9 |
| 30 | 0 | 17 | -9 |
| … | … | … | … |
| 34 | 0 | 17 | -9 |
| 35 | 0 | 17 | -9 |
| … | … | … | … |
| 39 | 0 | 17 | -9 |
| 40 | 1 | 16 | -8 |
| … | … | … | … |
| 44 | 1 | 16 | -8 |
| 45 | 1 | 16 | -8 |
| … | … | … | … |
| 49 | 1 | 16 | -8 |
| 50 | 1 | 15 | -8 |
| … | … | … | … |
| 59 | 1 | 15 | -8 |
| 60 | 1 | 14 | -7 |
| … | … | … | … |
| 69 | 1 | 14 | -7 |
| 70 | 1 | 13 | -7 |
| … | … | … | … |
| 74 | 1 | 13 | -7 |
| 75 | 1 | 13 | -7 |
| … | … | … | … |
| 79 | 1 | 13 | -7 |
| 80 | 2 | 12 | -6 |
| … | … | … | … |
| 84 | 2 | 12 | -6 |
| 85 | 2 | 12 | -6 |
| 86 | 2 | 12 | -6 |
| 87 | 2 | 12 | -6 |
| 88 | 2 | 12 | -6 |
| 89 | 2 | 12 | -6 |
| 90 | 2 | 11 | -6 |
| 91 | 2 | 11 | -6 |
| 92 | 2 | 11 | -6 |
| 93 | 2 | 11 | -6 |
| 94 | 2 | 11 | -6 |
| 95 | 2 | 11 | -6 |
| … | … | … | … |
| 99 | 2 | 11 | -6 |
| 100 | 3 | 10 | -5 |
| … | … | … | … |
| 104 | 3 | 10 | -5 |
| 105 | 3 | 10 | -5 |
| … | … | … | … |
| 109 | 3 | 10 | -5 |
| 110 | 3 | 9 | -5 |
| … | … | … | … |
| 114 | 3 | 9 | -5 |
| 115 | 3 | 9 | -5 |
| … | … | … | … |
| 119 | 3 | 9 | -5 |
| 120 | 3 | 8 | -4 |
| … | … | … | … |
| 124 | 3 | 8 | -4 |
| 125 | 3 | 8 | -4 |
| … | … | … | … |
| 129 | 3 | 8 | -4 |
| 130 | 3 | 7 | -4 |
| 131 | 3 | 7 | -4 |
| 132 | 3 | 7 | -4 |
| 133 | 3 | 7 | -4 |
| 134 | 3 | 7 | -4 |
| 135 | 3 | 7 | -4 |
| 136 | 3 | 7 | -4 |
| 137 | 3 | 7 | -4 |
| 138 | 3 | 7 | -4 |
| 139 | 3 | 7 | -4 |
| 140 | 4 | 6 | -3 |
| … | … | … | … |
| 144 | 4 | 6 | -3 |
| 145 | 4 | 6 | -3 |
| … | … | … | … |
| 154 | 4 | 5 | -3 |
| 155 | 4 | 5 | -3 |
| … | … | … | … |
| 159 | 4 | 5 | -3 |
| 160 | 5 | 4 | -2 |
| … | … | … | … |
| 164 | 5 | 4 | -2 |
| 165 | 5 | 4 | -2 |
| … | … | … | … |
| 170 | 5 | 3 | -2 |
| 171 | 5 | 3 | -2 |
| 172 | 5 | 3 | -2 |
| 173 | 5 | 3 | -2 |
| 174 | 5 | 3 | -2 |
| 175 | 5 | 3 | -2 |
| 176 | 5 | 3 | -2 |
| 177 | 5 | 3 | -2 |
| 178 | 5 | 3 | -2 |
| 179 | 5 | 3 | -2 |
| 180 | 5 | 2 | -1 |
| … | … | … | … |
| 189 | 5 | 2 | -1 |
| 190 | 5 | 1 | -1 |
| … | … | … | … |
| 194 | 5 | 1 | -1 |
| 195 | 5 | 1 | -1 |
| … | … | … | … |
| 199 | 5 | 1 | -1 |
| 200 | 6 | 0 | -1 |
| … | … | … | … |
| 209 | 6 | 0 | -1 |
| 210 | 0 | 0 | 0 |
| 211 | 0 | 0 | 0 |
| 212 | 0 | 0 | 0 |
| 213 | 0 | 0 | 0 |
| 214 | 0 | 0 | 0 |
| 215 | 0 | 0 | 0 |
| 216 | 0 | 0 | 0 |
| 217 | 0 | 0 | 0 |
| 218 | 0 | 0 | 0 |
| 219 | 0 | 0 | 0 |
| 220 | 0 | 0 | 0 |
| … | … | … | … |
| 254 | 0 | 0 | 0 |
Claims (6)
1. an elder generation judges according to the value of input pixel Cb and Cr whether this point is the blue pixel point that needs are handled, and then the required blue pixel point of handling is sought corresponding Δ Y, Δ Cb, Δ Cr increment relation according to its Y value component again and carries out blue enhancement processing method.
2. Δ Y, Δ Cb, the Δ Cr increment relation of one group of different Y values correspondence.
3. the method for article one description comprises the ASIC of hardware handles aspect, the Computer Image Processing software of software processes aspect in the application of different field.
4. the application of method aspect the difference demonstration of article one description comprises SDTV, HDTV, LCD.
5. the Δ Y of the different Y values correspondences described of second, Δ Cb, Δ Cr increment comprise the ASIC of hardware handles aspect, the Computer Image Processing software of software processes aspect in the application of different field.
6. corresponding Δ Y, Δ Cb, the application of Δ Cr increment aspect the difference demonstration of different Y values of second description comprises SDTV, HDTV, LCD.
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| CN2011100299607A CN102622725A (en) | 2011-01-27 | 2011-01-27 | Multiple-display-mode-supporting blue enhancement processing |
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| CN2011100299607A CN102622725A (en) | 2011-01-27 | 2011-01-27 | Multiple-display-mode-supporting blue enhancement processing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080143756A1 (en) * | 2006-11-10 | 2008-06-19 | Seiko Epson Corporation | Image display control device |
| US20090244386A1 (en) * | 2008-03-27 | 2009-10-01 | Lars Norgaard | Histogram and chrominance processing |
| TW201009748A (en) * | 2008-07-02 | 2010-03-01 | Qualcomm Inc | Color enhancement for digital images |
| CN101930533A (en) * | 2009-06-19 | 2010-12-29 | 株式会社理光 | Device and method for performing sky detection in image collecting device |
-
2011
- 2011-01-27 CN CN2011100299607A patent/CN102622725A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080143756A1 (en) * | 2006-11-10 | 2008-06-19 | Seiko Epson Corporation | Image display control device |
| US20090244386A1 (en) * | 2008-03-27 | 2009-10-01 | Lars Norgaard | Histogram and chrominance processing |
| TW201009748A (en) * | 2008-07-02 | 2010-03-01 | Qualcomm Inc | Color enhancement for digital images |
| CN101930533A (en) * | 2009-06-19 | 2010-12-29 | 株式会社理光 | Device and method for performing sky detection in image collecting device |
Non-Patent Citations (1)
| Title |
|---|
| 郑庆 等: "基于复合变换的人脸光照补偿方案", 《计算机应用研究》 * |
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Application publication date: 20120801 |