Image processing using information of one frame in binarizing a

Details Image processing using information of one frame in binarizing a Image processing using information of one frame in binarizing a

1996-02-22

1996-10-29

Jankus, Almis R.

395133, 395152, G06T 500

Patent

active

055704611

ABSTRACT:
An image processing apparatus eliminates problems encountered in binarizing processing when an A/D-converted multivalued frame image is entered continuously and the image is displayed continuously on a binary-image display device. In terms of binarizing processing, the error-diffusion method provides excellent results. However, when processing according to this method is applied as is to each frame image, rapidly shifting noise is produced on the display screen owing to the A/D conversion characteristics, etc. This occurs because individual frames are binarized independently. The invention reduces the occurrence of this noise by making the present frame of data reflect the preceding frame of data, i.e., by applying hysteresis of image data of the preceding frame to image data of the present frame when the present frame is binarized.

REFERENCES:
patent: 5119186 (1992-06-01), Deacon et al.
patent: 5254982 (1993-10-01), Feigenblatt et al.
patent: 5278678 (1994-01-01), Harrington
patent: 5331429 (1994-07-01), Levien

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