Dynamic threshold device

Details Dynamic threshold device Dynamic threshold device

1980-11-19

1982-08-17

Smith, Jerry

Boots, shoes, and leggings

358166, 358282, 358284, H04N 140, G06F 1520

Patent

active

043453147

ABSTRACT:
A two-dimensional history of reflectance values, from which black-white threshold decisions are made, is stored in a relatively small amount of memory. Updating of the history by non-linear functions is accomplished through the use of look-up tables.

REFERENCES:
patent: 3267293 (1966-08-01), Hinds
patent: 3800078 (1974-03-01), Cochran et al.
patent: 3988602 (1976-10-01), Gorsica, Jr.
patent: 4133008 (1979-01-01), Tisue
patent: 4251837 (1981-02-01), Janeway
patent: 4258394 (1981-03-01), Kennedy
J. F. Jarvis, C. N. Judice and W. H. Ninke; "A Survey of Techniques for the Display of Continuous Tone Pictures on Bilevel Displays; Computer Graphics and Image Processing," vol. 5, pp. 13-40, 1976.
K. Y. Wong; "Multi-function Auto Thresholding Algorithm"; IBM Technical Disclosure Bulletin, vol. 21, No. 7, pp. 3001-3003, Dec. 1978.

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