Edge extraction is an essential part of image processing. In digital image processing there are several optical methods for properly obtaining image edges. We propose a method of image edge extraction and enhancement by using a lens-based optical setup, the image, and its inverted form. The inverted and the noninverted images help here to obtain the image edges.
© 1998 Optical Society of America
Debendra Nath Das and Sourangshu Mukhopadhyay, "Image Edge Detection and Enhancement by an Inversion Operation," Appl. Opt. 37, 8254-8257 (1998)