Range Image Sensors and Sensing Techniques
Range imaging sensors collect three-dimensional coordinate data from visible surfaces of objects in the scene. The output of a range sensor is termed a range image. Range images are unique in that the image pixels explicitly represent scene surface geometry in a sampled form. Since three-dimensional information is directly available in a range image, the problem of recognizing and localizing three-dimensional objects in a range image is to a great extent simplified. This is in contrast to a video sensor wherein the extraction of three-dimensional scene geometry from the pixel intensity values involves imposing specific constraints on the geometrical and physical properties of the objects in the scene, as is done in shape-from-shading, shape-from-texture, shape-from-shadows, etc. Range images are used in a wide variety of applications such as automated inspection, robot bin-picking, automated assembly, autonomous navigation, and medical diagnosis.
KeywordsTactile Sensor Range Image Wide Dynamic Range Range Sensor Holographic Interferometry
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