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image processing- calculate image blur extend and direction

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munch kitty
munch kitty 2012-1-13
The code was
c(i)=fft(log(abs(image)));
then calculate c(i') to get the calculate image blur extend and direction. for differentiation of the image i am used sobel filter.bt the diagram(answer) i got was not relevant... i dont know where the mistke? whether using fft or fft2 or fftn for images? or which filter is appropriate for use?
[Merged from duplicate question]
i want to process the image. for the image i have to calculate fft, then abs,then log,t hen again fft. during calculating abs the output was simply white screen. no original image? whats the reason?
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munch kitty
munch kitty 2012-1-19
sorry sir...i cant get u?4 papers u told.i ask about which filter is used for differentiation?
Walter Roberson
Walter Roberson 2012-1-19
You wrote, "actually in the ieee paper" and I am pointing out that IEEE has published multiple papers -- in other words we do not know WHICH paper you are looking at.

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回答（2 个）

christian bale
christian bale 2012-1-19
manoj kitty try in scilab it would be easy than matlab
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Ganesh
Ganesh 2012-1-20
Just wanna know so far what u ve implemented in project thats y i asked how many members..

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Walter Roberson
Walter Roberson 2012-1-19
What datatype are you using for your image? If it was an image file that was read in using imread() then the datatype is probably uint8, unsigned 8 bit integers, in which case abs() would not have any effect.
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Walter Roberson
Walter Roberson 2012-1-20
I glanced at the description a number of months ago, but I did not see the point of it at that time, so I am not likely to be able to describe how to use it.

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