1
James J Steinkirchner: Apparatus for detecting text edges in digital image processing. Eastman Kodak Company, Norman Rushefsky, February 21, 1995: US05392365 (136 worldwide citation)

Apparatus for detecting edges of black text in an original image. An edge detector which low pass filters the image signal to blur and widen any edges in the original image, and then high pass filters the low pass filtered signal to produce a first output signal which represents the blurred edges in ...


2
James J Steinkirchner, Lawrence B Telle: Method and apparatus for replicating a two-color original image with foreground and background colors exchanged. Eastman Kodak Company, Norman Rushefsky, March 15, 1994: US05295202 (9 worldwide citation)

Replication of a two-color original image with foreground and background colors exchanged is effected on a received signal representing the color information of each successive pixel of a two-color original image by generating a histogram of the color data distribution for each color plane of the or ...


3
James J Steinkirchner: Image processing apparatus and method for eliminating background density in a designated image area. Eastman Kodak Company, Norman Rushefsky, January 30, 1996: US05488491 (5 worldwide citation)

A reproduction apparatus such as one having an electronic electrophotographic marking engine includes an image scanning device for scanning and outputting signals representing image density data on a document. An area designating device such as a digitizing tablet is provided for generating signals ...



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