Display of images with transparent pixels

Details Display of images with transparent pixels Display of images with transparent pixels

2006-03-14

2006-03-14

Nguyen, Kimbinh T. (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S626000, C345S629000, C345S634000, C345S473000

Reexamination Certificate

active

07012616

ABSTRACT:
Displaying images having pixels thereof that are meant to be transparent is disclosed. In one embodiment, a method includes a first stage and a second stage. The first stage is performed once, to transform the image and generate a mask thereof. The second stage is performed each time the image is to be displayed, to copy the transformed image and the mask onto the display. In one embodiment, the transparent image is shrunk and/or stretched when displayed. The cases of animated images and dithering for alpha blending are also disclosed and covered by the invention.

REFERENCES:
patent: 5295200 (1994-03-01), Boyer
patent: 5909219 (1999-06-01), Dye
patent: 6377269 (2002-04-01), Kay et al.
Adobe, Adobe Photoshop 5.0, 1998, pp. 34, 74, 130, 249-255, 277-278.
HOWTO: Drawing Transparent Bitmaps, Microsoft Developers Service Network article Q79212, last updated Dec. 20, 1999.
Transparent Bits in Windows NT, Microsoft Developers Service Network article Q89375, last updated Jan. 10, 2000.
Ron Gery, Bitmaps with Transparency, Microsoft Developer Network Technology Group article, Jun. 1, 1992.

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