VBX Decompression
IMPACJ is a high speed, high quality, implementation of JPEG image compression that creates compressed image files that adhere to the JFIF (JPEG File Interchange Format) specification. The IMPACJ technology can be used to compress color and greyscale images. IMPACJ provides the user the capability to control the resulting compressed image's file size through the use of luminance, chrominance, and color sub-sampling compression parameters. In addition to these parameters, which specify the amount of loss allowed at compression time, the compression software now has the capability of performing additional file compression by utilizing optimized Huffman tables, based on the image data for each image, at the final phase of compression. The compressed images, containing either 24 bit true color data or 8 bit greyscale image data, can be saved in any of 3 file formats: .JPG files for baseline compatibility with the JFIF specification, .BMP files adhering to Microsoft's specification for BMP files containing JPEG compressed data, and PIC (for Pegasus Imaging Corporation) files which contain additional header information such as rotation and up to two optimal palettes containing 16 and 256 colors.
Progressive PicPress
PICPRESSÖ is designed to solve several problems associated with the use of digitized photographic images. Color and grayscale images in many file formats are very large files that can be difficult to transport and slow to view. Viewing quality problems commonly arise when using hardware designed to display limited numbers of colors to view a photographic image or to simultaneously view multiple images.
PICPRESSÖ utilizes sophisticated color mapping, dithering, and image compression technology to address each of these problems associated with the use of digitized photographic images. The large file sizes of color and grayscale images can be quickly and easily compressed to manageable sizes using PICPRESS' interface to the extremely flexible PIC image compression engine. These compressed images can then be quickly viewed in any of several sizes and displayed on 8 bit color and more capable display hardware with any of several palette options. PICPRESS also utilizes high speed color reduction techniques to enable users to create palettized BMP images from 4-bit, 8-bit and 24 bit uncompressed BMP, PCX, TGA, and TIF images. The output BMP images created can contain a palette derived from another image or the optimal palette for the image.