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make-static-projected-PNM-intensity-sensor image-file procedure


Makes an input device that senses light intensity. The PPM image in image-file is projected onto a unit square. The sensor has a constant stimulus which is taken from the image. Reading the sensor returns an intensity value between 0.0 (black) and 1.0 (white).

Erik Rauch
Sat May 8 16:42:57 EDT 1999