A question about LUT tables

Posted by Pedro J CamelloDr Pedro J Camello on Jan 29, 2014; 10:33pm
URL: http://imagej.273.s1.nabble.com/A-question-about-LUT-tables-tp5006336.html

I need to apply a common LUT to different images that will be obtained after some processing. My goal is to use that LUT to compare visually tens of images, but I don´t know the max and min values of the images (I just have a guess).

Instead of creating a custom LUT with my desired min and max values I was thinking of introducing in every image a pixel with given min and another pixel with a given max value. Then I could use any of the standard LUTs to compare all the images provided the LUT take my min and max values.

My question is, how do LUT tables "map" to the real pixel values of an image? Is enough to have a single pixel in the image with a min/max value to be used by the LUT?, or is needed for a value to reach a miimal percentage of the pixel population frequency to be used as min/max?

Thanks in advance

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