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Course Queries Syllabus Queries 2 years ago
Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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Anyone know what is the difference between gamma and exposure? and also what is the difference between gamma correction and exposure adjustment in image processing? I am not from image processing background .I am very confused and seem like they are the same but they should be different, right? Thank you.
Gamma correction is a non-linear global function that compresses certain ranges in your image. It is mainly used in order to be more efficient from human vision point of view, in fixed point format. It is absent in raw files, but exists in JPEG. Each pixel undergoes the following transformation:
y = x^p
Exposure is a physical phenomenon in your camera. Exposure adjustment on the other hand is linear global function. It is used mainly in order to compensate for lack or excess of exposure in the camera:
y = a*x
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