Resolution independent methods for rendering a graphic image on

Details Resolution independent methods for rendering a graphic image on Resolution independent methods for rendering a graphic image on

1996-04-04

1997-12-23

Wu, Xiao

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345136, 382298, G09G 500

Patent

active

057011389

ABSTRACT:
Resolution independent methods for rendering a graphic image on a display device include: a method for re-gridding an image for fast off screen to on screen transfers; and a method for modifying an image to encompass all pixels of the device resolution for both local and global gridding. The method for modifying an image to encompass all pixels of the device resolution for both local and global gridding comprises the steps of: determining the period at which the pixel pattern in the device space repeats; determining the relationship between the origin of the global space and the origin of the local space; mapping the image from source space to device space; determining whether the local origin is at a point with the same period as the origin of the global space; creating a difference table between the local and global space mappings; comparing the upper left point defining the source region to the difference table; increasing the source region on the left and top by the offset in the difference table; comparing the lower right point defining the source region to the difference table; and increasing the source region on the bottom and right by the offset in the difference table.

REFERENCES:
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patent: 5265176 (1993-11-01), Miller
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Alabert, F. and Mallet, J.L., A Local Grid Updating Scheme For Interpolation, An International Journal, 1989, pp. 1019-1023.
Leberl, Franz, Photogrammetric Interpolation, Photogrammetric Engineering and Remote Sensing, Jan. 1975, pp. 603-612.

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