How to find out strongest peak in radon and fourier transform?

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Answer 1

[Image Analyst]

See my attached radon demo, where I find the peak (max) and use that to rotate an image.

Answer 2

[Matt J]

The max() command?

[Pornima Birajdar]

I want extrema (min and max) of complex number or radon and fourier transform. I have already used that max() and min() but i am not getting correct results for motion blur detection. And also what is negative lines in radon transform?