Disc controller with color look-up table

Details Disc controller with color look-up table Disc controller with color look-up table

1996-04-05

2000-06-06

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

345186, 345199, 345358, 345516, G06T 1140

Patent

active

060724994

ABSTRACT:
A data processing system comprises a magnetic or optical disc 1, a disc controller 2, and a main data processing unit 5 communicating with the controller by means on an interface 6. The controller 2 comprises an internal processing unit which receives requests from the main data processing unit 5 for data to be read from the disc 1, and controls retrieval of the data from the disc 1 and transmission of data to the main data processing unit 5 via the interface 6. The controller 2 further comprises a buffer 3 for data read from the disc 1 prior to transmission to the main data processing unit 5. The controller 2 also comprises a look-up table 4 for modifying the data read from the disc 1 in accordance with predetermined. modification criteria prior to transmission to the main data processing unit 5. The system may be used in colour processing of image data, with the disc controller providing primary colour correction. There is also disclosed a method of handling image data in which a data structure in the form of a colour cube is preloaded by a colour processor with the cardinal vertices for interpolation to take place. The colour cube may be loaded with data corresponding to a relatively small range of colours. Colours which are within the range are processed through the cube, and colours which are outside of the range are not processed through the cube.

REFERENCES:
patent: 4897840 (1990-01-01), Weiss et al.
patent: 5254977 (1993-10-01), MacDonald
patent: 5434957 (1995-07-01), Moller
patent: 5463480 (1995-10-01), MacDonald
patent: 5726778 (1998-03-01), Tanio
patent: 5949409 (1999-09-01), Tanaka et al.

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