Abstract
A new optical fuzzy image recognizing system, which can recognize a number from a numerical letter and distinguish sex from a picture of person, has been proposed. The system quantifies a similarity between images on the basis of fuzzy theory using the optics. This optical calculating system uses images of a membership function depicted with a pulse width modulated image transformed two-dimensional picture. The similarity is represented with a function based on an algebraic product between membership functions. These membership functions represent shapes of a standard picture and a test picture. The test picture is recognized as being similar to a picture for which the value of similarity is the highest. This picture is also classified into a group of the similar picture. The paper has cleared that the optical system can recognize a numerical letter, 0 to 9,as a number indicated by the letter. Furthermore, the system was able to distinguish sex form a picture of person like a human.
