What is the meaning of gamma normalization in HOG(Histogram of Gradients)? Is it the same as gamma correction? Because I came across many journals saying that gamma normalization in HOG is the square root of the image intensity. But it is different compared to gamma correction's formula.
Gamma normalization in HOG (Histogram of Gradients)
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Gamma Normalization in HOG is actually Power Law Transformation
where
sis output pixel,ris input pixel,cis constant andγis exponent. Different devices used for image capture, display and printing use this power law transformation to correct image intensity values and this process is known as gamma correction. In short, gamma normalization in HOG is same as gamma correction.