Компьютерная графика, осень 2011: Цвет

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<ul><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>1</p><p>URL: http://www.school30.spb.ru/cgsg/cgc/</p><p>E-mail: CGSG@yandex.ru</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>2Sampling &amp; Quantization</p><p> (sampling, sampling rate)</p><p> (quantization)</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>3Sampling ()</p><p>8x8 16x16 32x32</p><p>64x64 128x128 256x256</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>4Quantization ( )</p><p>2 </p><p>8 </p><p>3 </p><p>16 </p><p>4 </p><p>256 </p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>5Fixed Thresholding</p><p> = 128</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>6Random Thresholding</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>7Patterning</p><p>5 </p><p>(2x2)</p><p>10 </p><p>(3x3)</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>8Ordered Dither</p><p> 2x2 </p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>9 </p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>10 </p><p>2x2 4x4</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>11 </p><p>8x8 16x16</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>12Error Diffusion: -</p><p>N= I(x,y)</p><p>Pixel(x,y,N)</p><p>Error = N I(x,y) </p><p> Error </p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>13Error Diffusion: </p><p>Frankie SierraFalse Floyd-Steinberg</p><p>Jarvice, Judice, Ninke</p><p>Stucki</p><p>Burkes</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>14 : uniform palette</p><p> : RGB :</p><p>ColorNo = B + SizeB * (G + SizeG * R)8</p><p>27</p><p>64</p><p>125</p><p>216</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>15 : OS palette</p><p>MS Windows Mac OS</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>16 : WEB &amp; safe palette</p><p>WEB </p><p> : 0-51-102-163-204-255</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>17 </p><p>random threshold ordered dither error diffusion</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>18 </p><p> (Commission internationale de l'clairage - CIE)</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>19RGB</p><p>red green blue</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>20CMYK</p><p>cyan magenta yellow black</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>21HSV</p><p>hue saturation value</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>22HSV conversion</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>23YCrCb</p><p>Y Cr Cb</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>24 </p><p> LUT: Color = LUT[Color]; , , </p><p>1</p><p> II =</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>25</p><p> (dither/error </p><p>diffusion) ( )</p><p> , ( RGB HSV). .</p><p> , YCrCb .</p></li><li><p>ColorColor</p><p> ..- 30</p><p>Computer Graphics Support Group</p><p>26</p><p> P. Heckbert, "Color image quantization for frame buffer display,", Computer Graphics, 16(3), pp. 297-307 (1982).</p><p> R. Ulichney, Digital Halftoning, The MIT Press, 1993. R. Floyd and L. Steinberg, An adaptive algorithm for spatial gray </p><p>scale, SID 1975 Symp. Dig. Tech. Papers, pp. 36-37, 1975. B. E. Bayer, An optimum method for two-level rendition of </p><p>continuous-tone pictures, IEEE International Conference on Communications, vol. 1, pp. 26-11 to 26-15, 1976.</p></li></ul>

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