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For a low-pass FIR filter h[n], the common normalization rule is with regards to H(j0), i.e., sum(h[n]). Then, how about the normalization rule for finite difference filters? For example, given...
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In the FBP algorithm, the ramp filter |w| has the zero response for the 0-frequency, thus its output has zero for the DC component, i.e., the average value would be zero, then, there would be...
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To create a simulated phantom sinogram, it is common to firstly create the 2-d digital image: I = phantom(xxx), and then apply the radon() transform: R = radon(I, theta). Since the phantom image...
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