Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-11-04
1993-09-14
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 22, H04N 5262
Patent
active
052454320
ABSTRACT:
The apparatus and method employ a variety of units, including Laplacian filters, rank value filters, edge detectors, gain units and summation units, to transform an input digitized signal of an image, the transformation being carried out for each pixel independently. The various elements are combined to produce a variety of desired visual effects, e.g. an airbrush effect. Further, an apparatus is provided in which a conditioning unit generates a conditioning function, which enables different parts of an image to be combined in accordance with different methods. Thus, a foreground of an image could have the edge content reinforced, whilst the background has brush stroke texture added.
REFERENCES:
patent: 4800430 (1989-01-01), Murakami et al.
patent: 4956872 (1990-09-01), Kimura
patent: 5063448 (1991-11-01), Jaffra et al.
Baxes; "Digital Image Processing" Prentice-Hall, Inc. 1984 pp. 129-172.
Edge Detection and the Laplacian Operator from [1], vol. 2.
Definition and Discussion of Morphological Edge Detectors from [2].
Thresholding Techniques from [1], vol. 2.
Definition of Opening, Closing from [2].
Definition of Erosion, Ditation from [2].
Contrast Modification from [1], vol. 1.
Contrast Modification Techniques from [3].
Median Filtering from [3].
Median and Rank Value Filtering from [1], vol. 1.
Mean Filtering from [1], vol. 1.
Definition of Convolution from [1], vol. 1.
Proceedings of the Seventeenth Annual Allerton Conference on Communication, Control, and Computing, 10-12 Oct. 1979, Allerton pp. 886-895, see the whole article.
1987 IEEE Int. symposium on Circuits and Systems, vol. 1 of 3, 4-7 May 1987, Philadelphia, Pa., IEEE, J.-H Lee et al.: "A fast algorithm for two-dimensional Wilcoxon filtering", pp. 268-271, see the introduction.
Bronskill John F.
Jaffray Ian
Groody James J.
Harvey David E.
Imageware Research and Development Inc.
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