rgb转化为hsv
rgb转化为hsv的C++程序代码#include "stdafx.h" #include void main(float R, float G, float B, float& H, float& S, float&V) { // r,g,b values are from 0 to 1 // h = [0,360], s = [0,1], v = [0,1] // if s == 0, then h = -1 (undefined) float min, max, delta,tmp; tmp = R>G?G:R; min = tmp>B?B:tmp; tmp = R>G?R:G; max = tmp>B?tmp:B; V = max; // v delta = max - min; if( max != 0 ) S = delta / max; // s else { // r = g = b = 0 // s = 0, v is undefined S = 0; H = 0; return; } if (delta == 0){ H = 0; return; } else if(R == max){ if (G >= B) H = (G - B) / delta; // between yellow & magenta else H = (G - B) / delta + 6; } else if( G == max ) H = 2 + ( B - R ) / delta; // between cyan & yellow else if (B == max) H = 4 + ( R - G ) / delta; // between magenta & cyan H *= 60; // degrees }
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