Method and apparatus for forming a source-independent image data

Details Method and apparatus for forming a source-independent image data Method and apparatus for forming a source-independent image data

1992-07-06

1995-04-11

Groody, James J.

Television

Special applications

Film, disc or card scanning

355 77, 355133, H04N 146, H04N 336, H04N 911, G03B 2732

Patent

active

054063256

ABSTRACT:
A technique for improving the tone and color reproduction of print and slide images which are photographed onto color negative film, scanned by a Photo CD negative scanner and transferred onto Photo CD discs is disclosed. The technique incorporates a calibration method for (1) producing color negatives (or slides) using normal scanner calibration targets, (2) producing controlled prints from the negatives, (3) re-photographing the prints (or slides) onto a second color negative film, and (4) performing the normal scanner calibration using this second "cascaded" film. The calibration step not only "compensates for" the second color negative film (as is the case when calibrating for "normal" film exposed from the original scenes) but also "compensates for" the first negative film "print through" (or slide) characteristics. This means that the image data recorded on the Photo CD disc will more closely resemble the data which would be produced if the original scene had been photographed on color negative film and scanned directly.

REFERENCES:
patent: 4166701 (1979-09-01), Miller
patent: 4970584 (1990-11-01), Sato et al.
patent: 5223891 (1993-06-01), Fierstein et al.

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