Photograph printing method

Details Photograph printing method Photograph printing method

1990-05-11

1993-07-13

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

354109, G03B 2780, G03B 1724

Patent

active

052278379

ABSTRACT:
Object brightness color information is recorded on a recording medium such as a photographic film at the time of taking an object image. In making a photoprint, the brightness information or color information is read from the photographic film, and is used for the calculation of a print exposure amount. The brightness information is used to convert photometric values at respective measurement points within a frame into brightness information. The color information is used to obtain the actual color of an object at respective measurement points. In one embodiment, effective measurement points are determined in accordance with the value of brightness information at respective measurement points, and characteristic values to be used for the calculation of a print exposure amount are derived by using the effective measurement points. In another embodiment, scene type is judged in accordance with the maximum value of the brightness information, and the print exposure amount is determined in accordance with the judged scene type. In yet another embodiment, scene type information is recorded on a photographic film, the scene type being discriminated in accordance with brightness values obtained by measuring the scene at respective divisional areas. To make a photoprint, the scene type information is read to determine a print exposure amount for the discriminated scene. In still another embodiment, the information representative of luminance values obtained through divisional area photometry, and an average luminance of a scene is recorded in a photographic film. A print exposure amount is determined by using the recorded luminance difference.

REFERENCES:
patent: 4168121 (1979-09-01), Freier et al.
patent: 4299479 (1981-11-01), Harvey et al.
patent: 4707119 (1987-11-01), Terashita
patent: 4862200 (1989-08-01), Hicks
patent: 4965627 (1990-10-01), Robison
patent: 5016039 (1991-05-01), Sosa et al.

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