Digital scan converter and method therefor

Details Digital scan converter and method therefor Digital scan converter and method therefor

1985-05-23

1987-08-25

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358112, H04N 701

Patent

active

046896759

ABSTRACT:
A digital scan converter with an initialization circuit. The initialization circuit, for example, a dedicated circuit or a computer, relates each pixel in a converted image to two or more respective pixels which lie adjacent to it and which are selected from an original image which is generated by a scanner. The initialization circuit also calculates and makes available interpolation constants to be used in deriving the value of a given pixel in terms of its respective, adjacently lying, group of pixels. When the converted image has a raster scan format, a satisfactory image is obtained when the respective group of pixels consists of two pixels between which lies the pixel whose value is to be calculated. By predefining the relationship between the pixels in the converted and original images before actual conversion begins real time operation is achieved.

REFERENCES:
patent: 4149242 (1979-04-01), Miller, Jr.
patent: 4212072 (1980-07-01), Huelsman et al.
patent: 4215414 (1980-07-01), Huelsman
patent: 4245250 (1981-01-01), Tiemann
patent: 4275415 (1981-06-01), Engle
patent: 4547803 (1985-10-01), Richards
patent: 4581636 (1986-04-01), Blaker et al.
"Digital Scan Converters in Diagnostic Ultrasound Imaging", by Ophir et al., Proceeding of the IEEE vol. 67, No. 4, pp. 654-664.

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