Randomly animating a flame in an image

摘要

Image drawing means (300) comprises random drawing means (302) for extracting a partial drawing pattern (VPj) of an extraction area from a drawing pattern (114) of the flame (100) such that the extraction area is shifted by a predetermined distance in one direction in each extraction, and combining the extracted partial drawing pattern (VPj) and an arbitrary mask pattern (Mj) to draw a composite image; shimmer drawing means (304) for arbitrarily moving a part of a background image (102) to generate a new moved image, and combining the new image and a mask pattern to draw another composite image in the part of the background image (102); process determining means (306) for determining whether or not each of the drawing processes has been finished or not; and image displaying means (308) for outputting image data drawn in an image memory (244) to a monitor (18) so that the outputted image data can be displayed on the screen of the monitor (18).