Tag Archives: python

Rotate tetrahedron around coordinate axis

Very simple, but inefficient and unscalable rotation of tetrahedron about y-axis with no hidden line removal. References: plot and some concepts: “Python Graphics – A Reference for Creating 2D and 3D Images”, B.J. Korites. transform matrices: https://gist.github.com/jaseg/ef83d89b39ae69fad07a deleting lines from plot: from: https://sourceforge.net/p/matplotlib/mailman/message/9334388/ Tetrahedron is constructed with four points (vertices) and six lines (edges). The …

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Implementation of discrete radon transform (parallel beam geometry)

The radon transformation was taken directly from https://gist.github.com/fubel/ad01878c5a08a57be9b8b80605ad1247, but with tweaks to allow variable steps in transform. The back-projection is a crude reverse of the forward transformation. This is an unfiltered back projection. skimage.transform.rotate instead of scipy.misc.imrotate (was removed from SciPy) reference for standard test image: https://scikit-image.org/docs/dev/auto_examples/transform/plot_radon_transform.html. This also has a scikit-image implementation of a …

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