IEEE Trans Image Process - An algorithm for power line detection and warning based on a millimeter-wave radar video.

Tópicos

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Resumo

Power-line-strike accident is a major safety threat for low-flying aircrafts such as helicopters, thus an automatic warning system to power lines is highly desirable. In this paper we propose an algorithm for detecting power lines from radar videos from an active millimeter-wave sensor. Hough Transform is employed to detect candidate lines. The major challenge is that the radar videos are very noisy due to ground return. The noise points could fall on the same line which results in signal peaks after Hough Transform similar to the actual cable lines. To differentiate the cable lines from the noise lines, we train a Support Vector Machine to perform the classification. We exploit the Bragg pattern, which is due to the diffraction of electromagnetic wave on the periodic surface of power lines. We propose a set of features to represent the Bragg pattern for the classifier. We also propose a slice-processing algorithm which supports parallel processing, and improves the detection of cables in a cluttered background. Lastly, an adaptive algorithm is proposed to integrate the detection results from individual frames into a reliable video detection decision, in which temporal correlation of the cable pattern across frames is used to make the detection more robust. Extensive experiments with real-world data validated the effectiveness of our cable detection algorithm.

Resumo Limpo

powerlinestrik accid major safeti threat lowfli aircraft helicopt thus automat warn system power line high desir paper propos algorithm detect power line radar video activ millimeterwav sensor hough transform employ detect candid line major challeng radar video noisi due ground return nois point fall line result signal peak hough transform similar actual cabl line differenti cabl line nois line train support vector machin perform classif exploit bragg pattern due diffract electromagnet wave period surfac power line propos set featur repres bragg pattern classifi also propos sliceprocess algorithm support parallel process improv detect cabl clutter background last adapt algorithm propos integr detect result individu frame reliabl video detect decis tempor correl cabl pattern across frame use make detect robust extens experi realworld data valid effect cabl detect algorithm

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