04866785 is referenced by 21 patents and cites 7 patents.

Apparatus and method for processing multi-valved images includes an erosion filter and a dilation filter. The erosion filter determines the frequency with which a pixel having the same value as a pixel at a first check position of a first window appears in the first window. If the frequency of appearance is equal to or less than a value predetermined for the pixel value of the first check position, the pixel value at the first check position is made null. This operation is recursively executed while scanning a multi-valved image with the first window. The dilation filter replaces any null pixel value at a second check position of a second window with a selected non-null pixel value in the second window. The selected non-null value has the maximum frequency of appearance in the second window. This operation is also recursively executed while scanning the multi-valved image with the second window.

Title
Multi-valved image processing apparatus and method
Application Number
945066
Publication Number
4866785
Application Date
June 23, 1988
Publication Date
September 12, 1989
Inventor
Kohji Shibano
Kawasaki
JP
Agent
Terry J Ilardi
Assignee
International Business Machines Corporation
NY, US
IPC
G06K 9/00
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