Image Processing for Traffic Queue Control

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  • Topic: Digital signal processing, Computer vision, Image processing
  • Pages : 12 (2193 words )
  • Download(s) : 157
  • Published : February 7, 2013
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A Paper presentation on

REAL TIME IMAGE PROCESSING APPLIED TO TRAFFIC –
QUEUE DETECTION ALGORITHM

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ABSTRACT_____________________

This paper primarily aims at the new technique of video image processing used to solve problems associated with the real-time road traffic control systems. There is a growing demand for road traffic data of all kinds. Increasing congestion problems and problems associated with existing detectors spawned an interest in such new vehicle detection technologies. But the systems have difficulties with congestion, shadows and lighting transitions.

Problem concerning any practical image processing application to road traffic is the fact that real world images are to be processed in real time. Various algorithms, mainly based on back ground techniques, have been developed for this purposes since back ground based algorithms are very sensitive to ambient lighting conditions, they have not yielded the expected results. So a real-time image tracking approach using edged detection techniques was developed for detecting vehicles under these trouble-posing conditions.

This paper will give a general overview of the image processing technique used in analysis of video images, problems associated with it, methods of vehicle detection and tracking, pre-processing techniques and the paper also presents the real-time image processing technique used to measure traffic queue parameters.

TABLE OF CONTENTS

(1) Introduction………………………………………………………3 (2) Signal & Image Processing applied to traffic
1. Digital Signal
2. Need for processing………………………………………4 3. Parameters measurable…………………………………...4 4. Image analysis system structure………………………….4 (3) Stages of image analysis
Pipeline preprocessing…………………………………………...5 (4) Real-time image processing-Queue detection algorithm Methods of vehicle detection and tracking……………………...6 (5) Motion detection operation……………………………………...7 (6) Motion detection – flowchart…………………………………...8 (7) Vehicle detection algorithm

Left-limit selection program……………………………………9 (8) Threshold selection program
1. Threshold selection……………………………………...9 2. Traffic Movements at Junctions…………………………. 10 3. Results and Discussions………………………………... 11 (9) Conclusion………………………………………………………… 12 References ……………………………………………………………. 13

INTRODUCTION _____________________
• Digital processing is done with a digital computer or some special purpose digital hardware • The word Digital implies that the information in the computer is represented and sent by variables that taken limited number of discrete values. •increasing demand for road traffic data of all sorts

Variation of parameters in real-world traffic
Aimed to measure queue parameters accurately
Algorithm has two operations: vehicle detection and motion detection •Operations applied to profiles consisting sub-profiles to detect queue •Motion detection is based on applying a differencing technique on the profiles of the images along the road •The vehicle detection is based on applying edge detection on these profiles

Digital Signal
Digital systems functions more reliable, because only tow states are used (zero’s and one’s BINARY SYSTEM). The word signal is a function of independent variables. The signal it self carries some kind of information available for observation.

By processing we mean operating in some fashion on signal to extract some useful information. In many cases the processing will be none destructive “TRANEFER MODE” of the given data signal.
Signal processing will be done in many ways.
1. Analog signal processing
2. Digital signal processing...
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