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.

Title
Neighborhood image processing stage for implementing filtering operations
Application Number
6/583662
Publication Number
4541116
Application Date
February 27, 1984
Publication Date
September 10, 1985
Inventor
Robert M Lougheed
Ann Arbor
MI, US
Agent
Krass & Young
Assignee
Environmental Research Institute of MI
IPC
G06K 9/36
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