Gray scale image processor

Details Gray scale image processor Gray scale image processor

1983-04-14

1986-03-04

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358 81, 364526, 382 18, G06K 900

Patent

active

045743932

ABSTRACT:
A method for determining the average gray value of a plurality of regions within a digitized electronic video image and for determining the color of the region from the average gray value. Initial image segmentation is accomplished by thresholding a multibit digital value into a one bit black and white representation of a picture element of the region. The gray values of the picture elements within either a black or a white region can then be analyzed to determine the average gray value by constructing a histogram of each region and eliminating from the histogram the picture elements not associated with the actual color or shading of the region of interest. The remaining picture elements are averaged to obtain the average gray value for the region.

REFERENCES:
patent: 3705383 (1972-12-01), Frayer
patent: 3710011 (1973-01-01), Altemus et al.
patent: 4075604 (1978-02-01), Degasperi
patent: 4110826 (1978-08-01), Mollgaard et al.
patent: 4326258 (1982-04-01), de la Guardia
patent: 4399469 (1983-08-01), Lew
"A Simple Grey-Scale to Colour Converter"; R. P. Betts; Journal of Medical Engineering and Technology; vol. 3, No. 1, Jan., 1979; pp. 31-37.

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