Python 3，实现Lab转RGB颜色色域。
A simple Python 3 code to convert form Lab to RGB.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | import math def lab2rgb( inputColor ): num = 0 Lab = [0, 0, 0] for value in inputColor: Lab[num] = float(value) num = num + 1 xyz = [0, 0, 0] xyz[1] = (Lab[0] + 16) / 116 xyz[0] = Lab[1] / 500 + xyz[1] xyz[2] = xyz[1] - float(Lab[2]) / 200 for value in range(len(xyz)): if ( math.pow( xyz[value] , 3 ) > 0.008856 ): xyz[value] = math.pow( xyz[value] , 3 ) else: xyz[value] = ( xyz[value] - 16 / 116 ) / 7.787 xyz[0] = 95.047 * xyz[0] # ref_X = 95.047 Observer= 2°, Illuminant= D65 xyz[1] = 100.000 * xyz[1] # ref_Y = 100.000 xyz[2] = 108.883 * xyz[2] # ref_Z = 108.883 for value in range(len(xyz)): xyz[value] = xyz[value] / 100 RGB = [0, 0, 0] RGB[0] = xyz[0] * 3.24063 + xyz[1] * -1.53721 + xyz[2] * -0.498629 RGB[1] = xyz[0] * -0.968931 + xyz[1] * 1.87576 + xyz[2] * 0.0415175 RGB[2] = xyz[0] * 0.0557101 + xyz[1] * -0.204021 + xyz[2] * 1.0570 for value in range(len(RGB)): if ( RGB[value] > 0.0031308 ): RGB[value] = 1.055 * math.pow( RGB[value] , ( 1 / 2.4 ) ) - 0.055 else: RGB[value] = 12.92 * RGB[value] RGB[value] = round( RGB[value] * 255, 4) if ( RGB[value] < 0 ): RGB[value] = 0 elif ( RGB[value] > 255 ): RGB[value] = 255 return RGB |
示例 Example
1 2 3 4 5 | if __name__ == '__main__': color_rgb = lab2rgb( [100, 0, 0] ) print(color_rgb) #Output: [254.9988, 255, 254.9802] |