Computer graphics processing and selective visual display system – Computer graphics processing – Animation
Reexamination Certificate
1998-02-25
2001-05-01
Brier, Jeffery (Department: 2772)
Computer graphics processing and selective visual display system
Computer graphics processing
Animation
C345S440000, C345S440000
Reexamination Certificate
active
06226015
ABSTRACT:
BACKGROUND OF THE INVENTION
1. FIELD OF THE INVENTION
The present invention relates generally to computer graphics in computer systems and more specifically to generating sketches and cartoon images from digital video images.
2. DESCRIPTION OF RELATED ART
Digital special effects have been used in television and film productions to create images that cannot be created naturally by capturing a scene with a camera. Such special effects are typically generated through the use of expensive and specialized computer equipment by professional special effects personnel. However, with the increasing acceptance of powerful personal computers (PCs), there is a large and growing mass market for software capable of manipulating images for their entertainment effects. In addition, the introduction of inexpensive digital cameras which can be coupled to PCs creates new opportunities for the combined uses of PC and cameras. It is desirable for such systems to provide the capability for ordinary PC users to produce special effects related to images captured by digital cameras for entertainment purposes.
SUMMARY OF THE INVENTION
An embodiment of the present invention is a method of generating a sketch image by performing an adaptive luma chroma difference calculation to find and mark edges of objects in an input image as lines forming objects in the sketch image.
Another embodiment of the present invention is a system for generating a sketch image including an image capture device to obtain a first image, and a sketch generator coupled to the image capture device to produce a sketch image based on the first image by performing an adaptive luma chroma difference calculation to find and mark edges of objects in first input image as lines forming objects in the sketch image.
Another embodiment of the present invention is a method for automatically generating a sketch image including the steps of determining a luma value for each pixel in a first image, determining a luma change threshold for each pixel in the first image; marking edge pixels in the sketch image based on the luma values and luma change thresholds, and coloring the edge pixels a first color.
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Sukanya et al., “A new operator for image structure analysis”, IEEE, pp. 615-618, 1996.
Danneels Gunner D.
Howes Jason J.
Nee Peter A.
Brier Jeffery
Good-Johnson Motilewa
Intel Corporation
Skabrat Steven P.
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