Exposure control apparatus of photo-printer

Details Exposure control apparatus of photo-printer Exposure control apparatus of photo-printer

1997-02-05

1999-11-09

Grant, II, Jerome

Image analysis

Histogram processing

For setting a threshold

395106, 382162, G06F 1500

Patent

active

059829885

ABSTRACT:
An imaging device is provided for detecting color image data to use for displaying a video image simulating a consequent photo-print of an original frame to be printed. A photometric device is provided for measuring three color densities of the original frame. The dynamic range of the imaging device is changed in accordance with the three color densities measured by the photometric device. A main area of the original frame is extracted based on the color image data detected by the imaging device, and three color densities of the main area are extracted from the three color densities measured by the photometric device, and are used for calculating print-exposure amounts of three colors.

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patent: 5122831 (1992-06-01), Suzuki
patent: 5337130 (1994-08-01), Satoh

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