Image processing device for optically decoding an image...

Details Image processing device for optically decoding an image... Image processing device for optically decoding an image...

2007-11-20

2007-11-20

LaRose, Colin (Department: 2624)

Image analysis

Histogram processing

For setting a threshold

C382S273000

Reexamination Certificate

active

09796743

ABSTRACT:
An image processing device such as an image scanner, etc., and its objective is to actualize a proper binarizing routine specific to the types of images. A histogram of density values is drawn based on decoded data, and after the respective levels and frequencies of the white and black peak values have been calculated, the types of decoded images are classified based on their relationships. After the original type has been thus determined, a binarization threshold value calculation method optimally suited for said type is selected, and after the threshold value has been thereby calculated, an image binarizing routine is executed.

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