LOSSLESS REGION OF INTEREST CODING

摘要

In a method and a device for transmission of S+P transform coded digitized images a mask is calculated by means of which a region of interest (ROI) can be transmitted lossless whereby the ROI can be transmitted and received lossless and still maintaining a good compression ratio for the image as a whole. This is possible since no or ver y few bits can be used for the remaining part of the image. The calculated mask can also be used for transmitting the coefficients neede d for a lossless region of interest during any stage of the transmission.