Facsimile Coding by Skipping White

Thomas S. Huang, A. B.Shahid Hussain

Research output: Contribution to journalArticlepeer-review


The white block skipping (WBS) method of coding binary facsimile images consists of breaking each scan line into N picture-element (pel) blocks, then using “0” as the code word for all-white blocks and “1” followed by the binary pattern in the block for non-all-white blocks. In the first part of this paper, we derive (based on a first-order Markov source model) the optimum block size N and its corresponding minimum bit rate as functions of the average white and black run lengths of the image. In the second part of this paper, we propose a modified coding scheme where all-white scan lines are essentially skipped. This modified scheme is found to be as efficient as run length coding for transmitting texts.

Original languageEnglish (US)
Pages (from-to)1452-1460
Number of pages9
JournalIEEE Transactions on Communications
Issue number12
StatePublished - Dec 1975
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Facsimile Coding by Skipping White'. Together they form a unique fingerprint.

Cite this