Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1993-05-18
1996-01-09
Powell, Mark R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358456, 345147, G06F 1500
Patent
active
054836344
ABSTRACT:
A display control apparatus includes an input device to input image data, a memory to store the inputted image data by an amount corresponding to first and second image planes, a comparator to compare the stored image data of the first and second image planes, and a processor to halftone process the image data of the pixel in which the value of the image data of the first image plane is different from the value of the image data of the second image plane. A transmitting circuit transmits the data which has been halftone processed by the processor to a display apparatus such as a ferroelectric liquid crystal display. The image data is sent from a computer, a hard disc drive, a floppy disk drive, or the like.
REFERENCES:
patent: 4958238 (1990-09-01), Katayama et al.
patent: 4964699 (1990-10-01), Inoue
patent: 5130819 (1992-07-01), Ohta
patent: 5253340 (1993-10-01), Inoue
patent: 5253936 (1993-10-01), Ishida
patent: 5309254 (1994-05-01), Kuwabara et al.
"Halftoning Method for Mosaic Color Displays Using Error Diffusion", IBM Technical Disclosure Bulletin, vol. 32, No. 5A, pp. 194-197 (Oct. 1989).
Canon Kabushiki Kaisha
Powell Mark R.
Tung Kee M.
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