Correlation and image compression for limited-bandwidth CCD.

Thompson, Douglas G.

Sandia National Laboratories

关键词: Image Transmission.;    Correlations;    Image Processing Image Transmission.;    Synthetic Aperture Radar.;    Radar;   

DOI  :  10.2172/923168
RP-ID  :  SAND2005-3402
RP-ID  :  AC04-94AL85000
RP-ID  :  923168

美国|英语

来源: UNT Digital Library

【 摘 要 】

As radars move to Unmanned Aerial Vehicles with limited-bandwidth data downlinks, the amount of data stored and transmitted with each image becomes more significant. This document gives the results of a study to determine the effect of lossy compression in the image magnitude and phase on Coherent Change Detection (CCD). We examine 44 lossy compression types, plus lossless zlib compression, and test each compression method with over 600 CCD image pairs. We also derive theoretical predictions for the correlation for most of these compression schemes, which compare favorably with the experimental results. We recommend image transmission formats for limited-bandwidth programs having various requirements for CCD, including programs which cannot allow performance degradation and those which have stricter bandwidth requirements at the expense of CCD performance.