how to plot frequency vs log intensity of a 2D image?

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Sansri Basu
Sansri Basu 2014-2-26
评论： Image Analyst 2014-3-10
The graph should appear as shown in the figure given
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Sansri Basu
Sansri Basu 2014-2-26
编辑：Sansri Basu 2014-2-26
the output of the resultant image should appear as that shown in figure 1 and figure 2 of the paper in the link i have provided below:
www.klab.caltech.edu/~xhou/papers/cvpr07.pdf

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回答（1 个）

Image Analyst
Image Analyst 2014-2-26
Call fft2 on your image. Take the real part or call abs(). Then take the log and call
imshow(logImage, []);
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Sansri Basu
Sansri Basu 2014-3-10
nop, itz only showing the original image, the graph is appearing blank!!!!!!!! please help!!!!!!!
Image Analyst
Image Analyst 2014-3-10
Sansri, I just copied and pasted and it worked fine. It produced this:
I don't know why you are expecting a graph. It makes an image, not a graph. What did you do to my code to make it not work? You must have done something else besides just copying and pasting that code.

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