and SGI IRIS workstations. Wrote C, 80x86 assembly, FORTRAN, Pascal, and BASIC software for PCs, microVAXes, and CRAY supercomputer, to generate and analyze images (using Fourier and Gabor analysis), and display images on CGA, EGA, VGA, IBM PGA, PC Vision, and DT-2871 PC option cards, and SGI IRIS supergraphics workstations. System