Thank you. I had visited this link before posting. I couldn't find out from it if for an image: a. we categorize the component pixels as midtone, highlight or shadow based on absolute pixel values (e.g. is a pixel with value in the range (0,0)-(65,65) always a shadow pixel) OR b. the categorization is done based on the total range of pixels that make up the image (e.g. for an image with pixels in the range (0,0)-(90,90) only pixels in the range (0,0)-(30,30) are considered shadow pixels) Or am I missing some basic concept that I need to understand first? Could you please guide?
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