Patent ID: 7212678
Filing Date: 2007-05-01
Classification: G06T

Abstract:
1. A method of retrieving an image for display, the image being stored in a compressed wavelet-based format having blocks encoded substantially independently, said method comprising the steps of: (a) providing a representation of the image at a first resolution; (b) identifying a selected portion of the representation for reproduction at a second resolution, the second resolution being a resolution higher than the first resolution; (c) identifying a first set of the blocks at the second resolution, the first set of blocks corresponding to the selected portion; (d) retrieving, decompressing and rendering the first set of blocks to display; (e) identifying a second set of blocks at the second resolution, the second set of blocks being spatially adjacent to the first set of blocks; (f) retrieving and decompressing the second set of blocks; and (g) re-rendering the decompressed first set of blocks using the decompressed second set of blocks to thereby display the selected portion at the second resolution.