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Proceedings Paper

Coding For Machine Readable-Human Readable Pictures
Author(s): Robert A. Gonsalves; Alicia Shea
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Paper Abstract

If a picture is oversampled by a factor of N in both x and y directions, the resulting subarray for each original pixel contains up to N2 log2L bits of information, where L is the number of grey levels in each element of the subarray. The original pixel needs to be recorded at only about 8 bits for human viewing so the subarray can carry additional information. For example, a terrain map can be coded to include the x-y coordinates, the terrain height, and a geological descriptor. We describe a simple binary code (L=2) in which each 10 by 10 subarray (N=10) has its weight (the number of ones) constrained to yield 9 decimal descriptors. The code is self-synchronous so that no elaborate positioning techniques are required to read out the data.

Paper Details

Date Published: 7 December 1978
PDF: 9 pages
Proc. SPIE 0149, Digital Image Processing II, (7 December 1978); doi: 10.1117/12.956664
Show Author Affiliations
Robert A. Gonsalves, EIKONIX Corporation (United States)
Alicia Shea, EIKONIX Corporation (United States)


Published in SPIE Proceedings Vol. 0149:
Digital Image Processing II
Andrew G. Tescher, Editor(s)

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