| 摘要 |
PCT No. PCT/GB95/01828 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Aug. 2, 1995 PCT Pub. No. WO96/29680 PCT Pub. Date Sep. 26, 1996A system and method for processing digital images are presented. Prior art systems and methods compare all corresponding pixel locations as between two images before transmitting the difference therebetween to receiving apparatus. A significant factor in the length of time taken to compare two digital images and transmit to a receiving terminal the difference therebetween is the number of pixels which have to be compared or processed. As between successive images many pixels remain constant and any changes are generally localised. The invention performs a comparison between a first and second image to determine the location of the localised areas. Thereafter, successive images are compared only at the locations within or neighbouring the localised areas. Therefore, a significant reduction in the number of pixels to be compared can be realised by focusing processing efforts on such localised areas thereby resulting in an increase in processing speed.
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