图象的平整与行程码

IMAGE FLATTENING AND ENCODING

As a simple and effective method,run length encoding has its widerange applications in image data compression.Nevertheless,its efficiency decreaseswhen the image is severely deformed by noise or its grey levels are changedfrequently The new algorithm used in flattening,whioh serves the functions ofeliminating noise and unifing grey levels of adjacent pixels with little difference,is specially tailored to deal with the problem.Together with a theoretical proof,our experiments give good insight into the new method,which possesses theadvantages of low complexity,high compression ratio,high accuracy of edgereservation and high speed.