Integrated Device for Optical Edge Detection
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
The optical detectors used in specialized applications, such as OCR (optical character recognition) systems, need not preserve grey scale information in the image. For OCR application, a detector should provide information on the local black or white intensity of the image. One method of finding the local black/white intensity of the image is to find the black to white and the white to black transition in the edges of characters. A detector which discriminates the edges of characters can be an advantage in doing image processing for OCR applications.