title: Increase image saturation
body: <p>How would I go about increasing the saturation of an <a href="http://en.wikipedia.org/wiki/RGB_color_model" rel="nofollow">RGB</a> image in MATLAB? Would I have to convert the RGB array to an <a href="http://en.wikipedia.org/wiki/HSL_and_HSV" rel="nofollow">HSV</a> array first?</p>