Image processing method and apparatus with error diffusion

Details Image processing method and apparatus with error diffusion Image processing method and apparatus with error diffusion

1994-05-20

1996-08-06

Kostak, Victor R.

Television

Video display

Projection device

348752, 358445, H04N 514

Patent

active

055438555

ABSTRACT:
An image processing apparatus which enables error diffusion in interlaced-scanning image data. An input unit inputs image data formed by interlaced-scanning, and an adder adds error data to the input data. A binarization circuit performs level-conversion on this data. An error calculator obtains a quantization error as error data to be diffused to other pixels. The error data is stored in first and second lines in a line buffer. When processing for one scanning line is finished, error data for the next scanning line is read out of a frame buffer and stored into the first line in the line buffer, and the error data stored in the second line in the line buffer is stored at a corresponding position in the frame buffer, then the second line is cleared.

REFERENCES:
patent: 5130819 (1992-06-01), Ohta

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