.gamma.-correction curve selecting apparatus and a .gamma.-corre

Details .gamma.-correction curve selecting apparatus and a .gamma.-corre .gamma.-correction curve selecting apparatus and a .gamma.-corre

1996-12-30

1998-01-27

Rogers, Scott A.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

382274, 358457, 358458, H04N 140, H04N 1403

Patent

active

057129304

ABSTRACT:
An image processing apparatus capable of creating or selecting a most suitable .gamma.-correction curve and shortening the image quality adjusting time. According to the invention, in an image processing apparatus for correcting the .gamma.-characteristic of the density value for each pixel of the original image to be processed and the output value of the image processing measure in the predetermined apparatus for receiving the image, or the .gamma.-characteristic of the writing-in value of the image processing apparatus in the predetermined apparatus for outputting the image and the density of the output image, the image processing apparatus includes a .gamma.-correction curve creating device for creating the .gamma.-correction curve from the input .gamma.-characteristic, and a second .gamma.-correction curve selecting device for selecting the most suitable .gamma.-correction curve among the plural .gamma.-correction curves by use of the .gamma.-correction curve emitted from the .gamma.-correction curve creating device.

REFERENCES:
patent: 4792979 (1988-12-01), Nomura et al.
patent: 5216463 (1993-06-01), Morita
patent: 5296919 (1994-03-01), Maruno et al.
patent: 5353239 (1994-10-01), Kashiwagi
patent: 5363318 (1994-11-01), McCauley
patent: 5376962 (1994-12-01), Zortea

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