Soft copy display of facsimile images

Details Soft copy display of facsimile images Soft copy display of facsimile images

1986-04-02

1989-12-05

Brigance, Gerald

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340731, 340799, 382 56, 3582611, G09G 336

Patent

active

048855766

ABSTRACT:
Digital data defining images are stored in a multiplane buffer. The buffer may store plural images by restricting data corresponding to an image or image portion to storage in less than half the bit planes of the buffer. An image is displayed by reading data from the buffer and selectively passing only a portion of the data read to a display. The data defining the images may be converted from facsimile (single bit per pixel) to gray scale format (multiple bits per pel) before being written to the buffer. The conversion relies on a table storing data definitive of the effect, on the image, of a facsimile transition (1/0 ot 0/1) as a function of the location of the transition. Conversion from facsimile to gray scale is effected by examining the facsimile data for data transmission and summing the effect of each of the transitions to convert a segment of facsimile data to gray scale data.
A system is also disclosed for rapidly converting an image in run-end form to a reduced-resolution gray-tone image.

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Hunter et al.,--"International Digital Facsimile Coding Standards"--Jul. 1980--Proceedings of IEEE, vol. 68, No. 7, pp. 845-867.

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