how to detect double compressed JPEG images using DCT coefficients?

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Ajay Ganti
Ajay Ganti on 28 Feb 2018
Commented: Ajay Ganti on 28 Feb 2018
I have a problem related to jpeg compression. How to detect double compressed images using DCT coefficients? Also it is said to plot the histograms for DCT coefficients at frequencies (1,1), (1,2), (2,1) and (2,2) positions. Please help me to do it

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