Compressing angiocardiographic still images: the new release of ITACA package for UNIX platforms

Abstract

Since some years we are studying new irreversible compression techniques for angiocardiographic still images. We now present a new release of the software package named ITACA (Irreversible Threshold-based Angiocardiographic images Compressor and Archiver) collecting the irreversible compression techniques BEL, PABEL and PABCEL.In our study we specially attended to the definition of a suitable path for image scanning.All compression algorithms we defined, permit to check and to limit, for each pixel, the brightness and contrast errors committed in approximating the original image. Algorithms do not request any preliminary training stage.The package was implemented using C language and runs on both MS-DOS and UNIX environment,