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Dark Subtraction

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Hi guys

i was just wondering is it a best practice principle to do Dark Subtraction even if it doesnt change much.

i have an image that has a lot of water reflectance which gives a considerable amount of zero and ones so whenever i do dark subtraction it does nothing and also when i choose values there is only a slight differences.

otherwise the image is very clear and needs very little adjustment


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If your values are related to higher slopes do the atmospheric correction of the image using atcor 3D utility.

If you are facing the problem in  classification, do the unsupervised classification using principal axis with standard deviation 3.

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