Dynamic chain-based thresholding using local characteristics

Details Dynamic chain-based thresholding using local characteristics Dynamic chain-based thresholding using local characteristics

2005-09-20

2005-09-20

Couso, Jose L. (Department: 2621)

Image analysis

Image compression or coding

Contour or chain coding

Reexamination Certificate

active

06947605

ABSTRACT:
One embodiment relates to an apparatus for image processing. The apparatus includes a candidate edge chain identifier for identifying candidate edge chains in an image being processed, means for calculating a dynamic chain-based threshold function that is dependent on at least one characteristic of the image being processed, and a threshold applicator for applying the dynamic chain-based threshold function to the candidate edge chains. The characteristic of the image being processed may be local in that it is calculated from the vicinity of each candidate chain. A system may include an encoder or a decoder, both of which include the above apparatus. Another embodiment relates to a method for image processing. The method determines a dynamic chain-based threshold function that is dependent on at least one characteristic of the image being processed and applies the dynamic threshold to a candidate edge chain.

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