4 May 2007 Automated target recognition of humans in infrared images
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The ability to automatically detect humans in infrared images has value in military and civilian applications. Robots and unattended ground stations equipped with real-time human ATR capability can operate as scouts, perform reconnaissance for military units, and serve to locate humans in remote or hazardous sites. With the algorithm proposed in this study, human targets can be detected in infrared images based on the structure and radiance of the human head. The algorithm works in a three step process. First, the infrared image is segmented primarily based on edges and secondarily based on intensity of pixels. Once the regions of interest have been determined, the segments undergo feature extraction, in which they are characterized based on circularity and smoothness. The final step of the algorithm uses a k-Nearest Neighbor classifier to match the segment's features to a database, determining whether the segment is a head or not. This algorithm operates best in environments in which contrast between the human and the background is high, such as nighttime or indoors. Tests show that 82% accuracy in identification of human heads is possible for a single still image. After analyzing two uncorrelated frames viewing the same scene, the likelihood of correctly classifying a human head that appears in both frames is 97%.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel Bankman, Daniel Bankman, Todd Neighoff, Todd Neighoff, } "Automated target recognition of humans in infrared images", Proc. SPIE 6562, Unattended Ground, Sea, and Air Sensor Technologies and Applications IX, 656204 (4 May 2007); doi: 10.1117/12.720582; https://doi.org/10.1117/12.720582

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