Digital photofinishing system including scene balance, contrast normalization, and image sharpening digital image processing
First Claim
1. 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 said digital image with a scene balance algorithm to produce a balanced digital color image;
using a contrast normalization algorithm, remapping said balanced digital color image to a preferred tone reproduction position;
mapping said contrast normalized digital color image through a hard copy media characteristic curve to produce a digital image mapped to print densities of said hard copy media;
sharpening said mapped digital color image with a sharpening algorithm optimized to avoid unacceptable artifacts; and
digitally printing said sharpened digital color image onto hard copy media.
10 Assignments
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Accused Products
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.
169 Citations
7 Claims
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1. A method of digital photofinishing comprising the steps of:
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producing a digital color image in optical printing densities of a color image captured on photographic media; processing said digital image with a scene balance algorithm to produce a balanced digital color image; using a contrast normalization algorithm, remapping said balanced digital color image to a preferred tone reproduction position; mapping said contrast normalized digital color image through a hard copy media characteristic curve to produce a digital image mapped to print densities of said hard copy media; sharpening said mapped digital color image with a sharpening algorithm optimized to avoid unacceptable artifacts; and digitally printing said sharpened digital color image onto hard copy media. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of digital photofinishing comprising the steps of:
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producing a digital color negative image in optical printing densities of a color image captured on a color negative; processing said digital color negative image with a scene balance algorithm to produce a balanced digital color negative image; using a contrast normalization algorithm remapping said balanced image to a preferred tone reproduction position; mapping said remapped digital color negative image through a hard copy media characteristic curve to produce a digital positive color image; sharpening said digital color positive image with a sharpening algorithm optimized to avoid unacceptable artifacts; and digitally printing said sharpened digital color positive image onto hard copy media.
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Specification