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Suppose image file values are in 0...255 in each color channel. If we define R-R/255 for the Red channel, we wish to carry out gamma
Suppose image file values are in 0...255 in each color channel. If we define R-R/255 for the Red channel, we wish to carry out gamma correction by passing a new value R to the display device, with RR It is co imate the calculation as creating new integer values in 0...255 via 1/2.0 mmon to carry out this operation using i nteger math. Su ppose we approx 1/2.0 (int) (255- (R (a) Comment (very roughly) on the effect of this operation on the number of actually available levels for display Hint: coding this up in any language will help you understand the mechanism at work better-and as well, then you can simply count the outout levels. (b) Which end of the levels 0... 255 is affected most by gamma correction, the low end near 0 or the high end near 255? Why? How much at each end? Suppose image file values are in 0...255 in each color channel. If we define R-R/255 for the Red channel, we wish to carry out gamma correction by passing a new value R to the display device, with RR It is co imate the calculation as creating new integer values in 0...255 via 1/2.0 mmon to carry out this operation using i nteger math. Su ppose we approx 1/2.0 (int) (255- (R (a) Comment (very roughly) on the effect of this operation on the number of actually available levels for display Hint: coding this up in any language will help you understand the mechanism at work better-and as well, then you can simply count the outout levels. (b) Which end of the levels 0... 255 is affected most by gamma correction, the low end near 0 or the high end near 255? Why? How much at each end
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