Triangle search experiment to isolate scene clutter effects

Richard K. Moore; H. A. Camp; Steve Moyer; Carl E. Halford

doi:10.1117/12.850457

22 April 2010 Triangle search experiment to isolate scene clutter effects

Richard K. Moore, H. A. Camp, Steve Moyer, Carl E. Halford

Proceedings Volume 7662, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXI; 76620C (2010) https://doi.org/10.1117/12.850457
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

A perception experiment was performed in an effort to measure the effect of clutter on search performance while keeping target size, target contrast, and system bandwidth constant. In the NVESD time-limited search (TLS) model, detection performance is said to only vary with changes in target size and target-to-background contrast, if the imaging system and the search time limit are left constant^4,8. The results of this experiment show that changes in scene clutter produce changes in detection performance when these other factors remain unchanged, thereby making a stronger case for the inclusion of a clutter metric into the NVESD TLS model. When using real imagery, it is difficult to find good examples of change in clutter without changes in target size, contrast, noise, or other factors also being present. Using computer generated imagery of triangles and tilted squares allowed the clutter aspect of search to be experimentally isolated. When applied to imagery in the perception experiment, the masked target transform volume clutter metric was shown to correlate well with the average observer response time.

Citation Download Citation

Richard K. Moore, H. A. Camp, Steve Moyer, and Carl E. Halford "Triangle search experiment to isolate scene clutter effects", Proc. SPIE 7662, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXI, 76620C (22 April 2010); https://doi.org/10.1117/12.850457

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