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Vehicle Type Automatic Recognition System

Author: ZhangHongXing
Tutor: ShenHaiHong
School: Chinese Geology University (Beijing)
Course: Communication and Information System
Keywords: Image processing Vehicle Recognition License Plate Location Car standard positioning Car logo recognition
CLC: TP391.41
Type: Master's thesis
Year: 2008
Downloads: 323
Quote: 2
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Abstract


Vehicle identification system is mainly constituted by the vehicle license plate recognition and vehicle type recognition two core technologies have a wide range of applications in the field of intelligent transportation, it is also the hot topic of cross-disciplinary research in computer vision, image processing and pattern recognition, and therefore related technologies are of universal concern. This paper focuses on the study of the location and identification of car styling and car flags, the corresponding theory to solve the above technical experiment to verify its effectiveness. This paper is divided into five sections are described: (1) image processing and object recognition technology Introduction: image preprocessing in the role of the entire system is very critical to deal with the results of a direct impact to the follow-up to the target location and identification. Target recognition technology is the core of the recognition system as a whole. Here we introduce some of the techniques used in the image preprocessing and wider recognition technology. (2) the classification of the vehicle shape detection: important technology of the vehicle shape, size identification technology vehicle models accurately identify system problems. Using differential operation to remove background interference; edge detection techniques to obtain the contour of the car on the background image and the side image of the actual car. Based on the statistical characteristics of the vehicle to determine the size of the vehicle type. (3) license plate positioning algorithm: the system uses the car marked the beginning of the license plate location based on location algorithm based on prior knowledge, license plate positioning directly affect the processing to the next step, is also key to improve the car standard positioning accuracy . In this paper, the license plate positioning algorithm is based on the edge of the projection, the experimental results show that the algorithm can meet the needs of real-time processing system. (4) car logo positioning and recognition by different specifications of the basic graphics such as round or oval: In view of the fact that most of the signs, license plate location based on determined based on a priori knowledge of the candidate regions of the license plate, and then use the definition of good simple graphic template, template matching algorithm based on the Hausdorff distance the car standard precise positioning. Standard for the more complex structure of the car, you can also make a good car standard template matching positioning, so that on the one hand to achieve the precise positioning of the car standard, another method to match the initial recognition results can also be used as the basis to judge. Then we use the edge of the car standard characteristics of secondary identification. (5) the recognition of identity by the other characteristics of the car: the current license plate car to identify other studies more, but less finer models of different brands of vehicles and displacement, and other special logo identifying research, this article is the last of these identities identify preliminary discussion.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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