Digital photofinishing system including scene balance, contrast

Details Digital photofinishing system including scene balance, contrast Digital photofinishing system including scene balance, contrast

1998-05-28

2000-08-01

Rutledge, D.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, 358518, 358527, G03D 2780

Patent

active

060974702

ABSTRACT:
A method of digital photofinishing comprising the steps of: producing a digital color image in optical printing densities of a color image captured on photographic media; processing the digital image with a scene balance algorithm to produce a balanced digital color image; using a contrast normalization algorithm, remapping the balanced digital color image to a preferred tone reproduction position; mapping the contrast normalized digital color image through a hard copy media characteristic curve to produce a digital image mapped to print densities of the hard copy media; sharpening the mapped digital color image with a sharpening algorithm optimized to avoid unacceptable artifacts; and digitally printing the sharpened digital color image onto hard copy media.

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W.A. Richards, "Lightness Scale from Image Intensity Distribution," Applied Optics, vol. 21, No. 14, Jul. 1982, pp. 2569-2582.

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