Image data processing method and device therefor

Details Image data processing method and device therefor Image data processing method and device therefor

1987-02-11

1988-03-29

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 382 54, 364807, H04N 5213

Patent

active

047347708

ABSTRACT:
An image data processing method for restoring an image worsened by non-linear characteristics of a transforming system, noises and others is disclosed, by which a quantity called energy function, in which the noises and others described above are taken into consideration, is defined, and treatments for modifying stochastically the value of the gray level of each of the pixels are repeated so that a probability determined by this energy function is made greatest and the function E({x.sub.i,j }) represented by the following equation is adopted for the energy function stated above; ##EQU1## where x.sub.k,l is the value of the gray level of the group of pixels directly adjacent to the sides of the object pixel x.sub.i,j ; y.sub.i,j is the value of the gray level at that time of the object pixel; f(x.sub.i,j) is the value corresponding to the true gray level of the object pixel obtained through the transformation system for transforming image signals into a first image data; and .alpha. is a coefficient.

REFERENCES:
patent: 4408343 (1983-10-01), Neill
patent: 4539703 (1985-09-01), Clearman
patent: 4601055 (1986-07-01), Kent
patent: 4641352 (1987-02-01), Fenster
patent: 4672444 (1987-06-01), Bergen
patent: 4692892 (1987-09-01), Anizan

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