abnormal sinc function!!!!

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What steps will reproduce the problem?
1. download ver 6.zip 
2. open file start_simulation.m, 
3. change the value of shape to dot
4. run press F5 to run

What is the expected output? What do you see instead?

SHould be a perfect sinc function 
but in the Fourier transform radon function at 0', abnormal at the centre

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Original issue reported on code.google.com by beckchan...@gmail.com on 3 Mar 2011 at 1:48

Attachments:

• Slice_at_angle_theta_0_in_Fourier_Space.png

[GoogleCodeExporter]

You are right.

I found someone asked this question in the Matlab forum:
http://www.mathworks.com/matlabcentral/newsreader/view_thread/168642

I also found that the imaginary part in the matrix variable "Fourier_Radon" is 
not zero. (It should be zero because the "circle" phantom is symmetric.)

It seems that the position of x=0 (or y=0) is not at the centre of the matrix 
when we do FFT/DFT.
Do we need to do ifftshift() before doing fft() in file "apply_fft1.m"?.

Original comment by antony.s...@gmail.com on 3 Mar 2011 at 1:56

• Added labels: Priority-High
• Removed labels: Priority-Medium

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Please check revision 69:
http://code.google.com/p/centralslice/source/detail?r=69

Original comment by antony.s...@gmail.com on 3 Mar 2011 at 4:14

Attachments:

• Slice_at_angle_theta_0_in_Fourier_Space.png

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Status of this issue is changed from "Accepted" to "Started".

Original comment by antony.s...@gmail.com on 3 Mar 2011 at 4:18

• Changed state: Started

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[deleted comment]

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Original comment by antony.s...@gmail.com on 6 Mar 2011 at 1:49

• Changed state: Started