color/chroma saturation.

[morsa]

Is there any method to measure how much color saturation an image has?
I'm thinking about that because I would like making a plugin for autocalibration on saturation between shots..

[neuron2]

You can convert the color space to HLS. Then take the average of the S's for all the pixels in the image.

[sh0dan]

Or you could accumulate abs(u-128) + abs(v-128) for all pixels - that should also give you an idea.