04656664 is referenced by 21 patents and cites 4 patents.

The method of the present invention reduces a binary digital image in size by a factor F by a method including the steps of: storing the image in bit sequence; removing one or more rows of bits along the vertical axis of the image to convert i rows of bits to j rows of bits where 0.5i.ltoreq.j<i; modifying a line adjacent to each line discarded to preserve selected information from the discarded line; repeating the steps of removing and modifying a predetermined number of times to achieve a reduction by a factor F1 along the vertical axis; rotating the image in a first direction by ninety degrees; removing one or more rows of bits along the original horizontal axis of the image to convert i rows of bits to j rows of bits where 0.5i.ltoreq.j<i; modifying a line adjacent to each line discarded to preserve selected information from the discarded line; repeating the steps of removing and modifying a predetermined number of times to achieve a reduction by a factor F2 along the original horizontal axis; rotating the image back to its original orientation; storing the reduced size image generated by the above steps.

Title
Method for reducing a binary image
Application Number
6/664137
Publication Number
4656664
Application Date
October 24, 1984
Publication Date
April 7, 1987
Inventor
Frederick C Mintzer
Shrub Oak
NY, US
Karen L Anderson
Peekskill
NY, US
Agent
Thomas P Dowd
George E Clark
Assignee
International Business Machines Corporation
NY, US
IPC
G06K 9/42
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