04124871 is referenced by 70 patents and cites 4 patents.

Resolution or size changing of scanned objects can be accomplished on contour coded data using the information obtained in the boundary following of exterior and interior borders of objects. The compressed boundary following data has its resolution changed by scale factor multiplying after decoding. The rescaled image is placed into a memory store for display. Uncompressed data is resolution changed by boundary following the stored image to obtain the object boundary coordinates. These coordinates are concurrently multiplied by a scale factor, compared to the scaled coordinate of the previous boundary picutre element and either contour encoded to compress the shrunken image or directed to a second memory store for display. The coordinates of each successive point are changed by the multipliers that scale the coordinates by the consolidation ratios. Each coordinate is affected separately. Any rational reduction factor can be achieved.

Title
Image data resolution change apparatus and process utilizing boundary compression coding of objects
Application Number
5/829387
Publication Number
4124871
Application Date
August 31, 1977
Publication Date
November 7, 1978
Inventor
Thomas H Morrin II
San Jose
CA, US
Agent
James A Pershon
Assignee
International Business Machines Corporation
NY, US
IPC
H04N 1/22
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