Video Surveillance Under The Guidance of Smt. D.Neelima M.Tech., Asst. Professor Submitted by G. Subrahmanyam Roll No: 10021F0013 M.C.A

Abstract: Video pre-processing steps such as frame separation, binary operation, gray enhancement and filter operation were conducted. Then the detection and extraction of moving object was carried out on images according to frame difference-based dynamic background refreshing method.

Existing system: Motion detection in consequent images is nothing but the detection of the moving object in the scene. In video surveillance, motion detection refers to the capability of the surveillance system to detect motion and capture the events. There are two conventional approaches to moving object detection, background subtraction and optical flow.

Proposed system: Frame difference method is used for detecting the moving objects is extracted according to the differences among two or three continuous frames. Frames are converted to grayscale images, now subtracting the background from the sequential frames for foreground detection. Then morphological operations are applied and moving objects were shown with a rectangular box in the output.

Modules: Extraction Gray scale image Subtraction Adjacent frame difference Method

Extraction: First insert the video file which is in AVI format and read video file. After reading the input video file, extracted the red, green and blue intensities separately. Gray scale image: Gray scale images are images without color, or achromatic images. The levels of a gray scale range from 0 (black) to 1 (white).

Subtraction: This proposed system dynamically extracting the background from incoming all video frames, it is subtracted from every subsequent frame and compared with the background threshold. If it is greater than the background threshold, it assumed as foreground otherwise it is background. The Background is updated in each and every frame.

Adjacent frame difference Method: In this method, moving object is extracted according to the differences among two or three continuous frames. since the time interval between two images is quite short, illumination changes have little influence on difference images, so the detection is effective and stable.

Hardware Requirements: Processor : Intel® Core™ i GHz / Above Ram : 2GB Hard Disk : 120GB Input Devices : Standard Keyboard & Mouse Output Device : Monitor 15”

Software Requirements: Operating System: Windows XP / Above Software: MatLab2011a

Experimental Result: The moving object detecting was adopted in an experiment on a short video. Difference processing was conducted on the two frames for the detection is effective and stable.

Screenshots: Persons in Motion input video

Persons in Motion output video

Conclusion: Video Surveillance can be seen from analysis and examples of the computer language Matlab. It has the characteristics of simple programming, easy operation and high processing rate.

References: Barron J, Fleet D, Beauchemin S. Performance of optical flow techniques. International Journal of Computer Vision, 1994, 12 (1) : Y Du, F Chen, W Xu, Activity recognition through multi-scale motion detail analysis, Neurocomputing, 2008, 71(16-18): A Lipton, H Fujiyoshi, Moving target classification and tracking from real - time video. Proc ofWACV'98, 1998: 8 – 14 [11] David Kuncicky, MatLAB Programming, Prentice Hall: New York, 2003

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