Publisher : The Korea Academia-Industrial cooperation Society
DOI : 10.5762/KAIS.2016.17.3.1
Title & Authors
An image enhancement algorithm for detecting the license plate region using the image of the car personal recorder Yun, Jong-Ho; Choi, Myung-Ryul; Lee, Sang-Sun;
We propose an adaptive histogram stretching algorithm for application to a car's personal recorder. The algorithm was used for pre-processing to detect the license plate region in an image from a personal recorder. The algorithm employs a Probability Density Function (PDF) and Cumulative Distribution Function (CDF) to analyze the distribution diagram of the images. These two functions are calculated using an image obtained by sampling at a certain pixel interval. The images were subjected to different levels of stretching, and experiments were done on the images to extract their characteristics. The results show that the proposed algorithm provides less deterioration than conventional algorithms. Moreover, contrast is enhanced according to the characteristics of the image. The algorithm could provide better performance than existing algorithms in applications for detecting search regions for license plates.
Cumulative Distribution Function;Histogram Equalization;Image Enhancement;Car Personal Recorder;car license plate;
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