MATLAB Answers

How can I find saturated pixels in an image?

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meghana sampath
meghana sampath on 3 Mar 2011
How can I find saturated pixels in an image?

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Matt Tearle
Matt Tearle on 3 Mar 2011
idx = all(A==255,3); would give you a logical array that is true at all white pixels (in a uint8 representation).
Otherwise, as Sean asks, what do you mean by "saturated"?

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Jan
Jan on 3 Mar 2011
Or for a [W x H x 3] DOUBLE array as RBG image: idx = all(A == 1, 3);

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Tim Zaman
Tim Zaman on 6 Apr 2011
convert to LAB with the RGB2LAB function.. that splits into three components; the dimensions will be [L;A;B]instaed of [R;G;B]... then you could state something like saturation=sqrt(A_component^+B_component^); which will be your level of saturation, then you just set a threshold. more matlab code on that is on http://www.timzaman.nl/?category_name=gen_matlab&lang=en

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