Bandwidth Compression: Its Effect On Observer Performance

Joseph E. Swistak

doi:10.1117/12.958255

28 December 1979 Bandwidth Compression: Its Effect On Observer Performance

Joseph E. Swistak

Proceedings Volume 0207, Applications of Digital Image Processing III; (1979) https://doi.org/10.1117/12.958255
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A study was conducted which examined the effects of simultaneous spatial and temporal bandwidth compression on observer detection and recognition performance of military targets. Five levels of temporal (frame rate) and four levels of spatial (bits per pixel) were co-varied using a factorially designed experiment. Of special interest was any interaction effect between the two main variables. A total of 48 observers were divided in four groups of 12. Each group was presented a single spatial reduction level at all five temporal reduction levels. Statistical analysis revealed no significant differences in subjects' detection or recognition performance due to changes in the temporal rate at which information was presented. Changes in the spatial levels (resolution) did have a significant effect on both detection and recognition performance. Although significant differences in subject performance were noted due to the interaction of the two main variables, in depth analysis revealed the interaction effect to be anomalous. The single most critical element of bandwidth compression appears to be spatial.

Citation Download Citation

Joseph E. Swistak "Bandwidth Compression: Its Effect On Observer Performance", Proc. SPIE 0207, Applications of Digital Image Processing III, (28 December 1979); https://doi.org/10.1117/12.958255

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