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| Method of recording and reproducing color video signals |
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| Recording apparatus |
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Generation of hard copy color photo reproductions from digitally created internegative
| Details |
Inventors: Manico, Joseph A.; Kristy, Stephen H.;
Assignee: Eastman Kodak Company (Rochester, NY)
Primary Examiner: Fuller; Benjamin R.
Assistant Examiner: Rogers; Scott A.
Attorney, Agent or Firm: Dugas; Edward
A hybrid multiple color print reproduction scheme for a digital color image photo-finishing system employing a digitally driven high spatial resolution color printer converts a stored digital positive (e.g. RGB-representative) color image into a second digital color (e.g. CYM-representative) image. This second digital image effectively corresponds to a mirror-reversed complement of the positive color image and is digitally adjusted such that its tone and color characteristics optimize reproduction of the positive image via a conventional chemical development process. The complement color image is output to a digital printer which prints an `internegative` image onto a transparency medium, rather than the customary print paper. This digitally produced `internegative` is used to replicate multiple copies of the original image using a conventional analog electro-optic system and an associated chemical-based print developing unit, thereby providing a substantial savings in reproduction time and costs. |
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DETAILED DESCRIPTION In accordance with the present invention, there is provided a hybrid photo-finishing system which integrates the low cost and reduced processing time for multiple copy replication by an analog optic/chemical system with the digital enhancement flexibility of a digital image processing system, thereby making it possible to substantially reduce the time of production and cost of printing large quantities (e.
g.
twenty to fifty or more) hard copy prints of images that have been optimized in a digital processing scheme.
More particularly, the present invention is directed to multiple print reproduction scheme that is provided as an adjunct to a digital color image processing system.
The digital color image processing system has a digital image data base in which digitized imagery data (e.
g.
red, green, blue (RGB)-representative data) for a captured positive color image is stored.
The stored data may be manipulated by a photofinishing workstation operator to customize the image and then output to a digitally driven, high spatial resolution reproduction device, such as a digitally driven thermal color printer, which is customarily used to print a positive color image directly onto a relatively high cost color print medium, such as thermal color print paper.
In accordance with a first embodiment of the invention, where the output print medium constitutes a positive image print medium, such as the above-mentioned Ektacolor color print paper, the hybrid system performs a mirror-image reversal of the stored digital positive color image and converts its color metric into a second digital color (e.
g.
cyan, yellow, magenta (CYM)-representative) image, which effectively corresponds to a complement of the positive color image.
This mirror-reversed, complement image is digitally adjusted by way of photofinishing software resident in the photo-finishing workstation, such that prescribed characteristics (e.
g.
tone and color) are optimized for reproduction of the positive image via a positive color print reproduction medium that may be used by a conventional chemical development process (e
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