Compressão sem Perdas de Imagens Mamográficas Utilizando Código Gray e Algoritmo PPM.

This work describes a mammographic image compression method that uses segmentation and the prediction by partial matching (PPM) data compression algorithm, together with the gray code and a bit plane image decomposition. The compressor will be included in a Computer-Aided Diagnosis System which is still being developed. Results show that the method achieves competitive compression rates in comparison with other advanced compressors, and brings some additional benefits which will be discussed in this work. [ABSTRACT FROM AUTHOR]