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Improvement Method of Recognition Rate Using Brightness Control of Vehicle License Plate  

Lee, Kwang Ok (조선대학교 컴퓨터통계학과)
Bae, Sang Hyun (조선대학교 컴퓨터통계학과)
Publication Information
Smart Media Journal / v.6, no.3, 2017 , pp. 57-63 More about this Journal
Abstract
The most important, essential prerequisite for the improvement of vehicle license plate recognition is the acquisition of high-quality vehicle images. Because typical images acquired from roads are affected by different environmental factors including the time of day, sunlight, and the weather, the brightness and the shape of the license plates in the images are inconsistent. To this end, many image corrections are performed, resulting in slower recognition and lower recognition rate. Therefore, in this study, we used the images acquired from roads to test the proposed method for fast capturing of vivid, high-quality vehicle images by measuring the brightness around license plates during real-time image capturing to control in real time the factors, such as shutter speed, brightness, and gain of the camera, that affect the brightness and the quality of the images.
Keywords
Controlling the Brightness; Vehicle License Plates; Recognition; Shutter Control;
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