图像颜色饱和度 [英] Image color saturation

问题描述

我试图找到一个饱和的功能形式，但没有找到任何东西。它不是那么难，但我所有的猜测都看起来不太正确（朝向去饱和的方向似乎更容易）。

I was trying to find a functional form for saturation but didn't find anything. It can't be that hard but all my guesses don't look quite right (the direction towards desaturation seems easier).

我有RGB格式的图像像素数据。最终图像也应采用RGB格式。那么，这些函数是如何定义的：

I have the pixel data of the image in RGB format. The final image should also be in RGB format. So, how are these functions defined:

r_n = saturation_r(r,g,b,sat);
g_n = saturation_g(r,g,b,sat);
b_n = saturation_b(r,g,b,sat); 

推荐答案

将RGB像素转换为HLS，按比例缩放S你的 sat 输入，然后转换回RGB。假码，假设所有颜色分量都在0.0到1.0范围内：

Convert the RGB pixel to HLS, scale the S by your sat input, then convert back to RGB. Pseudo-code, assuming all color components are in the range 0.0 to 1.0:

rgb_to_hls(r, g, b, h, l, s);
s = s * sat
hls_to_rgb(h, l, s, r, g, b);
return r, g, b

如果您需要RGB / HLS转换功能，这里是。

If you need RGB/HLS conversion functions, here they are.

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