FEATURE-EXTRACTION IN DIGITAL PHOTOGRAMMETRY

Feature extraction is the first and crucial step of all image analysis procedures. Together with their mutual relations, features form perce ptual structures on which hypothesis generation and reconstruction pro cesses are built. The article gives a framework for feature extraction within an interpretation system, discusses a possible object and imag e model useful for building up perceptual structures and gives example s for the use of various features for standard photogrammetric tasks.