Title :
Graphics image coding for freeze-frame videoconferencing
Author :
Mitchell, Joan L. ; Pennebaker, William B. ; Anastassiou, Dimitris ; Pennington, Keith S.
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
fDate :
5/1/1989 12:00:00 AM
Abstract :
A technique is presented for coding images that are bilevel in nature but have been captured in continuous-tone format. Following various stages of image processing, a three-level image is generated, and compressed to about 0.1 to 0.2 b/pixel. The technique has been implemented in the IBM freeze-frame videoconferencing system
Keywords :
data compression; encoding; picture processing; teleconferencing; IBM; continuous-tone format; data compression; filtering; freeze-frame videoconferencing; graphics image coding; gray scale images; image processing; shading correction; three-level image; thresholding; Block codes; Electrons; Facsimile; Graphics; Hamming distance; Image coding; Image resolution; Image sampling; Notice of Violation; Teleconferencing;
Journal_Title :
Communications, IEEE Transactions on
