Image matching with equivalent sharpness enhancement

Details Image matching with equivalent sharpness enhancement Image matching with equivalent sharpness enhancement

1997-01-21

1999-05-25

Rogers, Scott

Image analysis

Histogram processing

For setting a threshold

382167, 382254, 358518, 358447, 358532, H04N 158, H04N 160, G06K 1512, G06K 500

Patent

active

059076674

ABSTRACT:
Original image data are converted to device-independent image data expressed in a device-independent color space. The device-independent image data are re-converted to device-dependent image data expressed in a device-dependent color space used in an output device. Then, a specific sharpness enhancing process is carried out for the device-dependent image data, so as to generate output image data while the specific sharpness enhancing process is made equivalent to another sharpness enhancing process executed when a target output image is generated. This sharpness of the output image with a predetermined output device substantially agrees with that of the target output image. The method significantly improves the degree of matching in image reproduction between two different output images.

REFERENCES:
patent: 4972256 (1990-11-01), Hirosawa et al.
patent: 5283671 (1994-02-01), Stewart et al.
patent: 5313291 (1994-05-01), Appel et al.

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