Rendering diffusion curve images using multigrid Laplacian smoothing with boundary constraint pixels

摘要

#$%^&*AU2014215953A120160310.pdf#####- 33 ABSTRACT RENDERING DIFFUSION CURVE IMAGES USING MULTIGRID LAPLACIAN SMOOTHING WITH BOUNDARY CONSTRAINT PIXELS A method (800) of generating an output image from a plurality of diffusion curves is disclosed. Each of the diffusion curves defining a color on each side of the curve. The method calculates (820), in the output image, pixel values for boundary constraint pixels (602) adjacent to curve constraint pixels (601) located under the plurality of diffusion curves (200, 210), each of the boundary constraint pixels having a pixel value calculated using a distance from the boundary constraint pixel to at least one of the diffusion curves. Color from the boundary constraint pixels is then diffused (830,840) to diffused pixels having otherwise undetermined (unconstrained and undefined) values, and the output image is generated from the plurality of diffusion curves using the curve constraint pixels, the boundary constraint pixels and the diffused pixels. QAf21QAr 1 D1f7rf) en-i In-An3/12 200 204 l 202 201a 206 205 201 203 Fig. 2A 210 213 211 Fig. 2B 212