Eastman-kodak Company

Michael A Pickup

Hurjay Yeh

Yee S Ng

James K Lee

Kelly Stephen Robinson

Donald J McJury

A system for performing edge enhancement of mixed low resolution image files employs a binarization and sorting unit to sort data that is indicative of binary data from the mixed low resolution image input file. The sorted binary data is then supplied to a binary data edge enhancement processor for edge enhancement processing. The output from the binary data edge enhancement processor unit is supplied to a data merger unit along with the original image data. The data merger unit determines whether the original image data was part of a gray-scale image. If the data merger determines the original data is part of a gray-scale image, the original data is supplied as the output of the processing system. If the data merger determines that the original data is binary image data, the output from the binary edge enhancement processor unit is supplied as the output of the processing system.

Resolution enhancement system for combined binary and gray scale

An improved bar magnet and method of construction, and an improved magnetic core comprising an assembly of such magnets, for use in a processing station of an electrostatographic printing machine. The improved bar magnet is formed of permanent magnet material having magnetic domains therein that are magnetized along epicycloidal curve segments. The external magnetic flux density is improved over that of a conventionally-magnetized magnet. An injection mold for inducing the particular epicycloidal alignment of magnetic domains in the improved bar magnet is provided.

Bar magnet for construction of a magnetic roller core

A data storage system for an electronic color printer which stores data according to the type of information the data represents. When the data represents area fill and image information, the data is stored in the page buffer according to mode A of the invention wherein a plurality of pixels are all defined to have the same color with varying luminance levels. This color is defined in the memory in a uniform color space format. When the data to be stored is representing text or line graphics information, the data is stored in the page buffer according to mode B of the invention. In mode B, two-bit binary values in the page buffer are assigned to each pixel of a multiple-pixel cell. These two-bit values point to additional bytes in the memory block of the page buffer which in turn point to discrete colors in spectrums of 256 colors. Additional data indicates whether the output device is to reproduce the colors by halftoned or non-halftoned techniques. Thus, each pixel within the pixel cell can be printed in a color selected by the color portion of the page buffer. According to mode C of the invention, three separate color maps are defined in binary form by the bit patterns stored in the page buffer memory. Also in mode C, the method used to produce blacks in the output page is specified. By standardizing on the memory allocated to the page and utilizing this memory in different ways according to the nature of the inputted information, the printed page can be accurately stored with a minimum of memory space and without a reduction in perceived printing quality.

Page buffer system for an electronic gray-scale color printer

A data storage system for an electronic color printer which stores data according to what information the data represents. When the data represents area fill and image information, the data is stored in the page buffer according to mode 1 of the invention wherein a plurality of pixels are all defined to have the same color. This color is defined in the memory in a uniform color space format. When the data to be stored is representing text or line graphics information, the data is stored in the page buffer according to mode 2 of the invention. In mode 2, two-bit binary values in the page buffer are assigned to each pixel of a multi-pixel cell. These two-bit values point to additional bytes in the memory block of the page buffer which in turn point to discrete colors in a spectrum of 256 colors. Thus, each pixel within the pixel cell can be printed in a color selected by the color portion of the page buffer. According to mode 3 of the invention, three separate color maps are defined in binary form by the bit patterns stored in the page buffer memory. By standardizing on the memory allocated to the paage and utilizing this memory in different ways according to the nature of the inputted information, the printed page can be accurately stored with a minimum of memory space without a reduction in perceived printing quality.

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Rochester, NY, United States of America

Michael A Pickup