Document-analysis systems and techniques. Agraphics-recognition system for interpretation of line drawings. Automation recognition of engineering drawings and maps. Image-analysis techniques for geographic information systems. Digital image processing and tree-dimensional reconstruction in the basic neurociences. Applying digital processing methods in the analysis of retinal structure. Visual percepition using a Blackbord architeture. Analysis of high-resolution aerial images. Image formation and characterization for tree-dimensional vision. Enhancement of fingerprints using digital and optical techniques. The digital morphological sampling theorem.