04541116 is referenced by 80 patents and cites 3 patents.

A neighborhood transformation stage is designed to perform filtering operations on an image matrix. A group of pixel values in the image matrix are accessed. A series of comparators are used to compare the values of neighboring pixels with the value of a given pixel in the group. The outputs of the comparators are combined to form a vector to address a programmable look-up table. The addressed output of the look-up table is used as a control signal for a selector which either maintains the value of the given pixel or transforms it into another value associated with a neighboring pixel whose value has been ranked in a predetermined order by a rank sorter device used to compare the values of the neighboring pixels with each other.

Neighborhood image processing stage for implementing filtering operations
Application Number
Publication Number
Application Date
February 27, 1984
Publication Date
September 10, 1985
Robert M Lougheed
Ann Arbor
Krass & Young
Environmental Research Institute of MI
G06K 9/36
View Original Source