Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1995-08-04
1998-01-20
Burgess, Glenton B.
Television
Camera, system and detail
Combined image signal generator and general image signal...
348674, H04N 5002
Patent
active
057105944
ABSTRACT:
An apparatus for gamma-correcting image data includes gamma characteristic corrector, a memory, a characteristic selector, and a microprocessor. The characteristic corrector inputs image data values and outputs gamma-corrected image data values corresponding to the image data values according to stored gamma correction information. The memory stores differential data values, and each of the differential data values corresponds to at least one of a plurality of gamma characteristics for gamma correcting the image data values. Furthermore, the differential data values respectively correspond to differences between two values of the gamma-corrected image data values. The characteristic selector outputs a gamma characteristic selection signal which represents a particular gamma characteristic of the plurality of gamma characteristics, and the microprocessor inputs the selection signal and reads particular differential data values from the memory which correspond to the particular gamma characteristic. Then, the microprocessor generates the gamma correction information based on the particular differential data values and stores the gamma correction information in the gamma characteristic corrector. Accordingly, a gamma characteristic of the image signal can be corrected according to various gamma characteristics which are different from each other even though a small capacity of the memory has been used.
REFERENCES:
patent: 4862270 (1989-08-01), Nishio
patent: 5089890 (1992-02-01), Takayama
Burgess Glenton B.
Samsung Electronics Co,. Ltd.
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