Editing of digital images, including (but not limited to) highlighting and shadowing of image areas

In a digital image having pixels pi (i=1, 2, . . . ) and a brightness B(pi) at each pixel pi, the global dynamic range of an image is changed by replacing the brightness B(pi) with the brightness B*(pi)=B(pi)x(B0/Bavg(pi))epsilon, where B0 and epsilon are predefined constants, and Bavg(pi) is some a...

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