Patent ID: 8072472
Filing Date: 2011-12-06
Classification: G06T

Abstract:
1. A method of scaling a composite overlay image and a background image in a computing device, wherein the composite overlay image comprises a plurality of pixels in a buffer memory and each pixel comprises at least one color channel and at least one alpha channel, said method comprising an image processor: (a) identifying a set of pixels of the composite overlay image, wherein at least one pixel of the composite overlay image has an alpha value of zero and a color value that is not well defined, said identifying comprising: (b) dilating the color channels of the identified pixels to form a dilated composite overlay image in the buffer memory; (c) scaling the dilated composite overlay image to form a scaled dilated composite overlay image in the buffer memory; (d) scaling the background image to form a scaled background image in the buffer memory; and (e) combining the scaled dilated composite overlay image with the scaled background image to produce a combined image in the buffer memory.