System and method for employing non-alpha channel image data...

Details System and method for employing non-alpha channel image data... System and method for employing non-alpha channel image data...

2005-10-11

2005-10-11

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S589000, C345S600000, C345S605000, C382S276000, C382S283000

Reexamination Certificate

active

06954215

ABSTRACT:
An image rendered by a non-alpha-channel-aware application is employed in an alpha-channel-aware environment. The pixel data file to be written to by the non-alpha-channel-aware application is initialized by setting the alpha value for each pixel to 1. The alpha-channel-aware application then writes to the initialized pixel data file, changing some or all pixel data. The alpha value for each pixel is then decremented by 1 (modulo 256) making the changed pixels opaque and the unchanged pixels transparent.

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patent: 6400832 (2002-06-01), Sevigny
Mulder, J.D. et al., “Pixel Masks for Screen-Door Transparency”,IEEE Visualization, Proceedings of the Conference on Visualization, 1998, 351-358.
Porter, T. et al., “Compositing Digital Images”,International Conference on Computer Graphics and Interactive Techniques, Proceedings of the 11thAnnual Conference on Computer Graphics and Interactive, 1984, 253-259.

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