Compressing PC/AT-Based Video Graphics Array (VGA) Images
David R. Ahlgren, Hasan Gadjali, Leonard G. Roberts · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
The need for a compression system to significantly reduce the size of high resolution PC/AT based Video Graphics Array (VGA) image (picture) files, which can range from 64 Kbytes to over 1 Mbyte, stimulated an extensive research program that resulted in the development of new image conpression systems. This Discrete Cosine Transform (DC') based compression scheme can reduce VGA image file sizes by a factor of more than 6-to-1 with only minor detectable image degradation. The technology to be discussed is designed specifically to operate on the PC/AT-based platform equipped with VGA display. This paper will discuss the characteristics of VGA images versus full color RGB images and the compatibilities between these two types of images.