Image composition system and process using layers

Details Image composition system and process using layers Image composition system and process using layers

1998-04-02

2000-10-10

Brier, Jeffery A.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G09G 500

Patent

active

061306762

ABSTRACT:
A layer based paint system permits painting of an image raster of a composite image while viewing subsequent processing on the image raster. The composite image is mapped to an image processing tree. Each of the elements in the image processing tree are defined by an associated data structure that identifies their parent and children elements in the tree. Each of the elements may be, for example, an image element or a process element. Associated with each image element is an image raster and a transform. Viewing and painting of an image element may be done at any level in the image processing tree. Painting of the element directly modifies the pixels in the image raster. The pixel coordinates of brush strokes in the viewed image are transformed into pixel coordinates of the image raster material by applying the inverse transform of the viewed layer, the image element layer and all of the intermediate layers to the pixel coordinates of the brush strokes. The profile of the brush stamp is also transformed by applying the inverse transforms of the image layer and all intermediate layers to the pixel coordinates of the brush stamp. Because the process elements are separated from the image elements in the image processing tree, painting may be performed on any layer while viewing the effects of subsequent processing.

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