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Questions on Final Exam Review Slides

Ask questions about the final exam review slides here.

For the red-eye removal problem, would it be that your computer filters out pixels that match an already-defined pixel(that of the red-eye) and maps the color to the new one. I got all the other answers, but I missed this one in lecture.

"filters out"? Think about threshold and how we increased the red in Barb's hair. Mark Guzdial

Your computer already knows the color to look for(pre-determined by the red-eye removal program) so it looks for pixels that are close to that color(within a threshold) and then increases the color of those pixels by an amount and the color you choose.
The computer knows the RANGE of pixels within the picture (determined by the mouse circle), and then it checks the range of pixels for colors that are within a THRESHOLD of "red" (R,G,B = 255,0,0). But then it probably doesn't increase/decrease color – it's probably doing a replace. (Remember the selection from the palette?) Mark Guzdial

I totally misread the problem. Thanks for the explanation!!!!


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