Photocopying – Projection printing and copying cameras – Multicolor picture
Patent
1997-05-15
1999-11-16
Mathews, Alan A.
Photocopying
Projection printing and copying cameras
Multicolor picture
355 68, 355 71, 358527, 358302, G03B 2780
Patent
active
059867418
ABSTRACT:
An imaging apparatus for reading an image recorded on a photographic film includes: a solid-state imaging device on which an image derived from light transmitted through the photographic film is formed; a density-measuring device for receiving the light transmitted through the photographic film and for measuring a large area transmittance density of the image for each color of R, G, and B; and a correcting device for correcting image color signals on the respective colors of R, G, and B outputted from the solid-state imaging device, on the basis of a ratio of large area transmittance densities of the image for the respective colors of R, G, and B determined from an RGB output of the density-measuring device. Accordingly, since the image color signals on R, G, and B outputted from the solid-state imaging device are corrected in correspondence with the large area transmittance densities of the image for the respective colors of R, G, and B determined from the RGB output of the density-measuring device, it is possible to obtain image color signals having accurate color information irrespective of the spectral sensitivity characteristics of the solid-state imaging device.
REFERENCES:
patent: 4692794 (1987-09-01), Suzuki
patent: 4821073 (1989-04-01), Backus et al.
patent: 5006886 (1991-04-01), Suzuki
Fuji Photo Film Co. , Ltd.
Mathews Alan A.
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