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MY SITUATION: I am scanning color slides that are 20 years old. They have edge discoloration, meaning that the sides are somewhat darker (perhaps blueish) than the center of the slide. This is not a problem with my slide scanner; rather, it is inherent in the slides. I don’t know why they have this problem, since I am doing this job for my major professor.
So… here is an example of what I am talking aoubt. There is a link to a sample image here:
http://web.ics.purdue.edu/~racz/images/Image012.jpg
The concrete on the left should have roughly the same color as the concrete in the center, but it has a blue tint (I believe, maybe it is a mixture).
MY QUESTION: Is there a filter to adjust/perform color corrections for non-uniformity such as this, where a hue/saturation/balance is non-uniform across the image? It may be a linear gradient, or perhaps even a circular/eliptical gradient?
Thanks in advance.
So… here is an example of what I am talking aoubt. There is a link to a sample image here:
http://web.ics.purdue.edu/~racz/images/Image012.jpg
The concrete on the left should have roughly the same color as the concrete in the center, but it has a blue tint (I believe, maybe it is a mixture).
MY QUESTION: Is there a filter to adjust/perform color corrections for non-uniformity such as this, where a hue/saturation/balance is non-uniform across the image? It may be a linear gradient, or perhaps even a circular/eliptical gradient?
Thanks in advance.
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