Accession Number : ADA319894
Title : Color Facsimile.
Descriptive Note : Final rept.,
Corporate Author : DELTA INFORMATION SYSTEMS INC HORSHAM PA
Personal Author(s) : Perschau, Stephen
PDF Url : ADA319894
Report Date : FEB 1995
Pagination or Media Count : 66
Abstract : The purpose of this project was to continue the color facsimile work started under a previous task, including the evaluation of the use of default Huffman tables, optimized ("Custom") Huffman tables, default quantization tables, and scaled quantization tables. Included in this effort was the modification of existing JPEG compression and decompression software available from Independent JPEG Users Group to process CIELAB color images and to use externally specificed Huffman tables. In addition a conversion program was written to convert CIELAB color space images to red, green, blue color space images to allow viewing of the images by a commercially available viewing package such as HIJACK. This report provides a brief description f the objectives of the task, provides some backaground of the use of custom vs. default quantization matrices and Huffman coding tables for transmitting color FAX images by the JPEG baseline standard, includes the software development required in order to support the evaluation runs along with the results of the evaluation runs themselves and the conclusions that can be drawn from them, discusses comparing uffman vs Informational coding, and discusses possible future plans.
Descriptors : *COLORS, *FACSIMILE EQUIPMENT, *FACSIMILE TRANSMISSION, COMPUTER PROGRAMS, CONVERSION, SOFTWARE ENGINEERING, CODING, BASE LINES, IMAGES, QUANTIZATION, TRANSMITTING, VIEWERS, DECOMPRESSION.
Subject Categories : Recording and Playback Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE