NDLI: Subjective evaluations of integer cosine transform compressed galileo solid state imagery

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Subjective evaluations of integer cosine transform compressed galileo solid state imagery

Content Provider	NASA Technical Reports Server (NTRS)
Author	Grant, Terry Haines, Richard F. Chuang, Sherry Gold, Yaron
Copyright Year	1994
Description	This paper describes a study conducted for the Jet Propulsion Laboratory, Pasadena, California, using 15 evaluators from 12 institutions involved in the Galileo Solid State Imaging (SSI) experiment. The objective of the study was to determine the impact of integer cosine transform (ICT) compression using specially formulated quantization (q) tables and compression ratios on acceptability of the 800 x 800 x 8 monochromatic astronomical images as evaluated visually by Galileo SSI mission scientists. Fourteen different images in seven image groups were evaluated. Each evaluator viewed two versions of the same image side by side on a high-resolution monitor; each was compressed using a different q level. First the evaluators selected the image with the highest overall quality to support them in their visual evaluations of image content. Next they rated each image using a scale from one to five indicating its judged degree of usefulness. Up to four preselected types of images with and without noise were presented to each evaluator.
File Size	3352491
Page Count	72
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950004591
Archival Resource Key	ark:/13960/t3nw4d08t
Language	English
Publisher Date	1994-07-01
Access Restriction	Open
Subject Keyword	Astronomy Surveys Image Resolution Compression Ratio Image Processing Galileo Project Video Compression Cosine Series Image Reconstruction Acceptability Transformations Mathematics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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