Image memory device and method of operating same

Details Image memory device and method of operating same Image memory device and method of operating same

1994-04-29

1996-12-31

Harvey, David E.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348671, H04N 5202

Patent

active

055898890

ABSTRACT:
An image memory device is so adapted as to make it possible to use an image pick-up device having any characteristic and a display unit having any characteristic. The image memory device includes an input look-up table and an output look-up table. Data for performing a reverse gamma-correction is set in the input look-up table in advance in dependence upon the image pick-up device used. By virtue of the reverse gamma-correction, the image data is provided with linear characteristics. The reverse gamma-corrected data is stored in the memory. Data for performing a gamma correction is set in the output look-up table in advance in dependence upon the display unit used.

REFERENCES:
patent: 5196924 (1993-03-01), Lumelsky et al.
Haines, Frederick J, "Understanding Gamma Correction" Video Systems, Nov. 1977, pp. 20-24.
Baxes, Gregory A "Digital Image Processing" Prentice-Hall Inc pp. 69-70 1984.

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