Radon Transform and Direct Fourier Reconstruction (Demo)
 
This should work with recent desktop versions of Chrome or Firefox. It was coded using Vanilla JS.
 
You can click on some of the images to enable interactive featues. Hover over them for explanatory texts. You can also upload your own pictures (preferably square ones) by dragging them onto the one in the upper left corner.
 

 
Copyright (c) 2023, Prof. Dr. Edmund Weitz. Impressum, Datenschutzerklärung.

Radon Transform and Direct Fourier Reconstruction (Demo)

Original image (to 256×256)
Circular cutout (grayscale)
Radon transform
Line-by-line FFT
2D IFFT
2D FFT (crop with radius 1)
2D IFFT
Polar to Cartesian (weighted)
Copyright (c) 2023, Prof. Dr. Edmund Weitz. Impressum, Datenschutzerklärung.