Methods and systems for sub-pixel rendering with gamma...

Details Methods and systems for sub-pixel rendering with gamma... Methods and systems for sub-pixel rendering with gamma...

2007-05-11

2009-11-24

Caschera, Antonio A (Department: 2628)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C345S214000, C345S589000, C345S596000, C345S597000, C345S613000, C382S167000, C382S272000, C382S274000, C348S254000, C358S519000

Reexamination Certificate

active

07623141

ABSTRACT:
Sub-pixel rendering with gamma adjustment allows the luminance of the sub-pixel arrangement to match the non-linear gamma response of the human eye's luminance channel. For each of a subset of input sampled data indicating a region of an input image, a gamma-adjusted data value is generated for each input image data value in the subset using a local average of at least two input image data values. A sub-pixel rendering operation uses the subset of gamma-adjusted data values and the subset of input image data values to produce an output data value for each sub-pixel element on the display panel. A plurality of output data values collectively indicates an output image. The gamma adjustment allows the sub-pixel rendering to operate independently of the actual gamma of a display device. The sub-pixel rendering techniques with gamma adjustment may improve image contrast in high spatial frequency portions of an image.

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