A new systolic algorithm which computes image differences in run-length encoded (RLE) format is described. The binary image difference operation is commonly used in many image processing applications including automated inspection systems, character recognition, fingerprint analysis, and motion detection. The efficiency of these operations can be improved significantly with the availability of a fast systolic system that computes the image difference as described in this paper. It is shown that for images with a high similarity measure, the time complexity of the systolic algorithm is small and, in some cases, constant with respect to the image size. A formal proof of correctness for the algorithm is also given.


Computer Science

Keywords and Phrases

Automated Inspection Systems; Binary Image Difference; Character Recognition; Data Compression; Fingerprint Analysis; Image Coding; Image Compression; Image Differences; Image Processing; Motion Detection; Parallel Algorithms; Run-Length Encoding; Systolic Algorithm; Time Complexity

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2000 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2000