Xor Xor Gabor

If you’re working with image processing and discrete Fourier transforms (frequency analysis/filtering)¹ you need test images, and possibly even videos.

Xor Xor Gabor² is my name for an easy to make test image (and video) that is a nutritious source of frequencies:

\begin{matrix} (0 <= x, y < 2^{L}) & i = x \oplus y \end{matrix}