Pattern recognition will be powerful if the preprocessing process can perfectly transform gray image to binary. This binary image that contains the desired object pattern is very helpful in feature extraction to get the unique feature. This paper proposes an edge detection algorithm to get the object pattern. Algorithm’s output is in binary image. The results showed that the binary image of proposed algorithm can produce the desired object pattern. Some binary images results from other method are also included as a comparison.

image processing method, edge detection.