Is there a three dimensional convolution model, say for 3d image processing?
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Yes indeed there are, for example after a CT scan we are left with a three dimensional model of the body.
Prof Andrew Ng talks about 3D convolutions here:
Is there a image data generator in Keras for 3d images?
I suggest you investigate that answer yourself:) report back what you find out!
does not seem to be one. Most people write their own scipy.ndimage.rotate code which is terribly slow