RGB转换HSV色彩空间（Python+MATLAB实现）

# Python3 program change RGB Color# Model to HSV Color Modeldef rgb_to_hsv(r, g, b):    # R, G, B values are divided by 255    # to change the range from 0..255 to 0..1:    r, g, b = r / 255.0, g / 255.0, b / 255.0    # h, s, v = hue, saturation, value    cmax = max(r, g, b)  # maximum of r, g, b    cmin = min(r, g, b)  # minimum of r, g, b    diff = cmax-cmin   # diff of cmax and cmin.    # if cmax and cmax are equal then h = 0    if cmax == cmin:        h = 0    # if cmax equal r then compute h    elif cmax == r:        h = (60 * ((g - b) / diff) + 360) % 360    # if cmax equal g then compute h    elif cmax == g:        h = (60 * ((b - r) / diff) + 120) % 360    # if cmax equal b then compute h    elif cmax == b:        h = (60 * ((r - g) / diff) + 240) % 360    # if cmax equal zero    if cmax == 0:        s = 0    else:        s = (diff / cmax) * 100    # compute v    v = cmax * 100    return h, s, vprint(rgb_to_hsv(0, 51, 238))

n-min-----max-min

  r, g, b = r / 255.0, g / 255.0, b / 255.0    cmax = max(r, g, b)  # maximum of r, g, b    cmin = min(r, g, b)  # minimum of r, g, b    diff = cmax-cmin   # diff of cmax and cmin.    if cmax == cmin:        h = 0    elif cmax == r:        h = (60 * ((g - b) / diff) + 360) % 360    elif cmax == g:        h = (60 * ((b - r) / diff) + 120) % 360    elif cmax == b:        h = (60 * ((r - g) / diff) + 240) % 360    if cmax == 0:        s = 0    else:        s = (diff / cmax) * 100    v = cmax * 100

https://ww2.mathworks.cn/help/matlab/ref/rgb2hsv.html

HSV = rgb2hsv(RGB)hsvmap = rgb2hsv(rgbmap)

>> rgb = prism(6)
rgb =
    1.0000         0         0    1.0000    0.5000         0    1.0000    1.0000         0         0    1.0000         0         0         0    1.0000    0.6667         0    1.0000

>> hsv = rgb2hsv(rgb)
hsv =
         0    1.0000    1.0000    0.0833    1.0000    1.0000    0.1667    1.0000    1.0000    0.3333    1.0000    1.0000    0.6667    1.0000    1.0000    0.7778    1.0000    1.0000

openExample('graphics/Hsv2RgbColormapExample')

hsv = [.6 1 1; .6 .7 1; .6 .5 1; .6 .3 1; .6 0 1];

rgb = hsv2rgb(hsv);surf(peaks);colormap(rgb);colorbar

C:\Users\CY-306\Documents\MATLAB\Examples\graphics