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20 July 2017 Video redaction: a survey and comparison of enabling technologies
Shagan Sah, Ameya Shringi, Raymond Ptucha, Aaron M. Burry, Robert P. Loce
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Journal of Electronic Imaging, Vol. 26, Issue 5, 051406 (July 2017). https://doi.org/10.1117/1.JEI.26.5.051406
Abstract
With the prevalence of video recordings from smart phones, dash cams, body cams, and conventional surveillance cameras, privacy protection has become a major concern, especially in light of legislation such as the Freedom of Information Act. Video redaction is used to obfuscate sensitive and personally identifiable information. Today’s typical workflow involves simple detection, tracking, and manual intervention. Automated methods rely on accurate detection mechanisms being paired with robust tracking methods across the video sequence to ensure the redaction of all sensitive information while minimizing spurious obfuscations. Recent studies have explored the use of convolution neural networks and recurrent neural networks for object detection and tracking. The present paper reviews the redaction problem and compares a few state-of-the-art detection, tracking, and obfuscation methods as they relate to redaction. The comparison introduces an evaluation metric that is specific to video redaction performance. The metric can be evaluated in a manner that allows balancing the penalty for false negatives and false positives according to the needs of particular application, thereby assisting in the selection of component methods and their associated hyperparameters such that the redacted video has fewer frames that require manual review.
© 2017 SPIE and IS&T
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Shagan Sah, Ameya Shringi, Raymond Ptucha, Aaron M. Burry, and Robert P. Loce "Video redaction: a survey and comparison of enabling technologies," Journal of Electronic Imaging 26(5), 051406 (20 July 2017). https://doi.org/10.1117/1.JEI.26.5.051406
Received: 9 February 2017; Accepted: 22 June 2017; Published: 20 July 2017
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Cited by 12 scholarly publications and 10 patents.
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KEYWORDS
Video
Video surveillance
Content addressable memory
Neural networks
Cameras
Convolution
Surveillance
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