| 摘要 |
The present invention relates to the field of downscaling and blending of two high resolution images, and particularly to a device and a method allowing for downscaling and blending of a HD JPEG background image and a HD bitmap image, which is overlaid on the JPEG background image. The device comprises means for downscaling the background image by a pre-determined factor n1, n2, . . . n<SUB>N</SUB>; means for uncompressing the downscaled background image and the high-resolution bitmap image; means for dividing the uncompressed high-resolution bitmap image into blocks of n1xn2x . . . xnN pixels, whereby the size of each block correspond to the size of each pixel of the downscaled background image; and, means ( 16 ) for blending each of the blocks of the uncompressed high-resolution bitmap image with each of the pixels of the downscaled background image and thus producing a blended image.
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