Introduction Why an article on "colors"? It's the same question I asked myself before writing this series. The fact is, in .NET, there are only two color formats that can be used: the RGB color model and the HSB color model. Those two are encaps…
This example demonstrates how to convert between a color value in RGB (three integer values in the range 0 to 255 representing red, green, and blue) and HSB (three floating point values in the range 0 to 1.0 representing hue, saturation, and brightne…
void Rgb2Hsv(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…
H参数表示色彩信息,即所处的光谱颜色的位置.该参数用一角度量来表示,红.绿.蓝分别相隔120度.互补色分别相差180度.纯度S为一比例值,范围从0到1,它表示成所选颜色的纯度和该颜色最大的纯度之间的比率.S=0时,只有灰度.V表示色彩的明亮程度,范围从0到1.有一点要注意:它和光强度之间并没有直接的联系.RGB转化到HSV的算法:max=max(R,G,B) min=min(R,G,B) if R = max, H = (G-B)/(max-min) if G = max, H = 2 + (B…
