Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-03-15
1989-12-19
Braun, Fred L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
346157, 355326, G03F 308
Patent
active
048886360
ABSTRACT:
An image forming system includes a color test chart that has a pattern with three tonality levels for each color component. A reading device can read the test chart as well as an original image and generates image signals representing the one of the test chart and original image thus read. A .gamma.-correcting circuit corrects the image signals in accordance with a .gamma.-correction characteristic and an image forming apparatus forms an image on the basis of the image signal that has been .gamma.-corrected by the .gamma.-correcting circuit. A discriminator discriminates a reproduction condition of tonality, including half tones, on the basis of the image of the test chart when formed by the image forming apparatus and thus produces a discrimination signal representing the discrimination. The .gamma.-correction characteristic used by the .gamma.-correcting circuit is selected in accordance with the discrimination signal so produced so as to obtain an appropriate reproduction condition of tonality, including half tones, in its entirety. Accordingly, color images having high fidelity may be produced.
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Braun Fred L.
Canon Kabushiki Kaisha
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