Douglas M Walker

US Patent:

58189602, Oct 6, 1998

Filed:

Mar 20, 1995

Appl. No.:

8/407785

Inventors:

H. Scott Gregory - Bedford MA
Robert Franklin Poe - Charlestown MA
Douglas George Walker - Boston MA

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G06K 900
G02B 512

US Classification:

382167

Abstract:

The output response of an image processing system having a color printer and a color printer characterization is linearized by printing a target image having target patches of differing color densities. After measuring printed patches, a calibration transform is generated that incorporates the relationship between requested and measured color densities. The calibration transform is then composed with the characterization, calibrating the printer characterization.

US Patent:

51811243, Jan 19, 1993

Filed:

Dec 20, 1991

Appl. No.:

7/810424

Inventors:

Richard C. Close - Winchester MA
H. Scott Gregory - Bedford MA
Douglas G. Walker - Billerica MA

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 129
H04N 1387
H04N 146
G03G 1501

US Classification:

358300

Abstract:

An arrangement for producing electrophotographic reproductions of an original image, including a source of digitized data that digitally represents an original image, a photocopier having determinable reproduction characteristics and which produces electrophotographic reproductions, and a printer. The printer is coupled to the source that receives the digitized data and produces an optical intermediate from the digitized data. This optical intermediate compensates for the determinable reproduction characteristics of the photocopier and of the scanner such that photocopying of the optical intermediate by the photocopier produces an accurate electrophotographic reproduction of the original image. The printer is provided with a composite device function table that relates target image pixel values used by the printer to measured color data of the output of the photocopier.

US Patent:

55836658, Dec 10, 1996

Filed:

Feb 13, 1995

Appl. No.:

8/387550

Inventors:

H. Scott Gregory - Bedford MA
Christopher M. Heinz - Nashua NH
Timothy K. Rodgers - Concord MA
George B. Pawle - North Reading MA
Douglas G. Walker - Boston MA

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 156
H04N 160

US Classification:

358504

Abstract:

A system that combines a reference color image with a color move tracer image creating a combined image capable of being edited as desired by the operator and one which records the actual color edits made on the reference image. The tracer is a color grid that represents the domain of colors in a specified color space encoding. The grid is converted into a color edit transform table and the color edits within the color space on a higher resolution version of the reference image, or on other images, can be performed using a table look-up operation. The invention can also be used to capture effects transforms that modify the input/output and/or screen display of an image without necessarily modifying the original image.