Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-08-11
1985-12-24
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358166, 382 54, H04N 5213, H04N 514, H04N 5208
Patent
active
045610223
ABSTRACT:
An improved image processing method prevents unwanted processing artifacts from degrading the reproduction of an image by stressing the interrelationship of various image gradients in the image. Image signals are generated representative of the light value of elements of the image. A local gradient signal is generated in response to a combination of image signals representative of an image gradient over a local portion of the image. An extended gradient signal is also generated representative of an image gradient over an image portion greater than the local portion. The image gradients are interrelated in a composite signal generated from a combination of the local and extended gradient signals. As an example of the combination, the composite signal is made to vary as a function of the difference between the gradient signals. The image signals are then modified subject to a characteristic of the composite signal, e.g., the magnitude of the composite signal.
REFERENCES:
patent: 3621129 (1971-11-01), Fisher
patent: 4055756 (1977-10-01), Jolivet
patent: 4220972 (1980-09-01), Geokezas
patent: 4231065 (1980-10-01), Fitch
patent: 4334244 (1982-06-01), Chan et al.
patent: 4399461 (1983-08-01), Powell
patent: 4446484 (1984-05-01), Powell
patent: 4463381 (1984-07-01), Powell
"Digital Techniques of Reducing Television Noise," by J. P. Rossi, Journal of the Society of Motion Picture and Television Engineers, Mar. 1978, pp. 134-140.
"A Method for the Digital Enhancement of Unsharp, Grainy Photographic Images," by P. G. Powell and B. E. Bayer, Proceedings of the International Conference on Electronic Image Processing, Jul. 26-28, 1982, pp. 179-183.
Eastman Kodak Company
Masinick Michael A.
Toth E. Anne
Woods David M.
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