06006990 is referenced by 87 patents and cites 16 patents.

A imaging based dataform reader utilizes a method of compensating for image offset between consecutive image fields comprising an interlaced image frame. The method includes determination of a disparity vector corresponding to the direction and magnitude of the offset between portions of successive fields. The disparity vector is determined by trial matching feature recognition data for a template area of a second image field to feature recognition data for a reference area of a first image field. The second field feature recognition data is trial matched to first field data at a plurality of offsets typical of hand jittering. The offset position providing the best feature match between the first and second fields is used to derive a disparity vector. The disparity vector is then applied to provide enhanced decoding by use of first field image data and registration-corrected second field image data. Feature recognition is achieved by use of digital filter value sets which may be adapted for recognition of horizontal, vertical or curved feature transitions.

Title
Dataform reader utilizing hand jittering compensation method
Application Number
526868
Publication Number
6006990
Application Date
January 24, 1997
Publication Date
December 28, 1999
Inventor
C Jim Li
Bothell
WA, US
Angi Ye
Lynnwood
WA, US
Agent
Watts Hoffmann Fisher & Heinke Co
Assignee
Telxon Corporation
TX, US
IPC
G06K 7/10
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