Mr. Aditya Roshan Profile

Aditya Roshan

PhD Student at Univ of New Brunswick

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Proceedings Article | 9 June 2014 Paper

Improved frame differencing based moving object detection using feet-step sound

Aditya Roshan, Yun Zhang

Proceedings Volume 9076, 90760A (2014) https://doi.org/10.1117/12.2053177

KEYWORDS: Video, Cameras, Signal detection, Fourier transforms, Video processing, Video surveillance, Optical flow, Optical filters, Electronic filtering, Geodesy

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Moving objects have been detected using various object detection techniques. Two categories for moving object detection techniques are frame differencing based and background subtraction based. These techniques are limited by camera scene complexity, light conditions, video type etc. Frame differencing based techniques process videos faster compared to background subtraction based techniques. Frame differencing based techniques detects only the boundary of the moving object and may fail for slow moving objects. These techniques for moving object detection can be improved by using sound data as most video recording cameras are equipped with a microphone. Sounds from human footsteps can be recorded with video and used with frame differencing techniques to improve moving object detection results. Camera microphones also record background noise with other background sound. This noisy data has been filtered out using the Fourier transform. When peak locations for each footstep sound are determined, and a Full Width at Half Maxima is computed for each peak, the number of frames within this width are counted, these frames are verify the presence of a moving object.

Proceedings Article | 9 June 2014 Paper

A comparison of moving object detection methods for real-time moving object detection

Aditya Roshan, Yun Zhang

Proceedings Volume 9076, 907609 (2014) https://doi.org/10.1117/12.2053176

KEYWORDS: Cameras, Optical flow, Video, Wavelets, Wavelet transforms, Video processing, Video surveillance, MATLAB, Detection and tracking algorithms, Image resolution

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Moving object detection has a wide variety of applications from traffic monitoring, site monitoring, automatic theft identification, face detection to military surveillance. Many methods have been developed across the globe for moving object detection, but it is very difficult to find one which can work globally in all situations and with different types of videos. The purpose of this paper is to evaluate existing moving object detection methods which can be implemented in software on a desktop or laptop, for real time object detection. There are several moving object detection methods noted in the literature, but few of them are suitable for real time moving object detection. Most of the methods which provide for real time movement are further limited by the number of objects and the scene complexity. This paper evaluates the four most commonly used moving object detection methods as background subtraction technique, Gaussian mixture model, wavelet based and optical flow based methods. The work is based on evaluation of these four moving object detection methods using two (2) different sets of cameras and two (2) different scenes. The moving object detection methods have been implemented using MatLab and results are compared based on completeness of detected objects, noise, light change sensitivity, processing time etc. After comparison, it is observed that optical flow based method took least processing time and successfully detected boundary of moving objects which also implies that it can be implemented for real-time moving object detection.

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