Convolve

Small piece of code that uses numpy or scipy ffts to convolve two images. Also has a wrapper to smooth an image with a kernel of a given size.

convolve.py

Correlate2d

Code to cross-correlate two images (or autocorrelate). This can be used to make a power-spectral-density image or power spectra.

correlate2d.py

psds

Use PSD2 to compute the power spectrum or power spectral density of an image.

psds.py