Produce a colorful map of crystalline regions from a high-resolution image in DigitalMicrograph using localized FFT analysis. The script scans with configurable spacing and FFT size, masks low frequencies, and maps the angle of the maximum lattice-spot to color. It also displays the intermediate 4D-STEM-like data cube and draws a color-wheel legend. While the result looks like an orientation map, it does not perform proper orientation mapping.