Effectiveness assessment of signal processing in the presence of smear

Moving imagery from a static scene was recorded with an uncooled thermal imager at nine different angular velocities ranging from 0 (static) to 1 pixel∕frame (3.75 deg ∕s) using a tilted rotating mirror. The scene contained a thermal acuity test chart with triangular test patterns based on the triangle orientation discrimination (TOD) test...

Conspicuity of moving soldiers

The construction and validation of soldier combat models requires data on the conspicuity of camouflaged targets in the field, and human targets in particular. So far, this data is lacking. Also, it si currently unknown to what degree luminance contrast and motion contribute to target conspicuity. These data are needed to enable the validation...

Effectiveness assessment of signal processing in the presence of smear

Moving imagery from a static scene was recorded with an un-cooled thermal imager at nine different angular velocities ranging from 0 (static) to 1 pixel/frame (3.75 deg/s) using a tilted rotating mirror. The scene contained a thermal acuity test chart with triangular test patterns based on the Triangle Orientation Discrimination (TOD) test...

Validating the TOD method with identification of real targets: Effects of aspect angle, dynamic imaging and signal processing

How far the eye reaches via camera is quantifiable and modeled with the TOD (triangle orientation discrimination) methodology (Bijl and Hogervorst, 2008 Perception 37 Supplement, this issue). For validation and extension purposes, we studied identification of real objects in several conditions. Objects (two-handheld) were recorded at various...

Target acquisition performance: Effects of target aspect angle, dynamic imaging and signal processing

In an extensive Target Acquisition (TA) performance study, we recorded static and dynamic imagery of a set of military and civilian two-handheld objects at a range of distances and aspect angles with an under-sampled uncooled thermal imager. Next, we applied signal processing techniques including DSR (Dynamic Super Resolution) and LACE (Local...

Perception of biological motion from limited-lifetime stimuli

The visual perception of human movement from sparse point-light walkers is often believed to rely on local motion analysis. We investigated the role of local motion in the perception of human walking, viewed from the side, in different tasks. The motion signal was manipulated by varying point lifetime. We found the task of coherence...