Abstract:Automated license plate recognition is important in many contexts like security and law enforcement, monitoring vehicles, automated parking control, etc. To enable these automated services in Bangladesh, we are reviewing and combining several established methods in this paper. The task of recognizing vehicle number plates consists of three stages: plate detection, plate extraction, and character recognition. Each stage has many sub-steps. For every sub-step, we have reviewed many methods and chosen the one that proved to be the best solution after thorough testing and observation. The main objective of this research is to gain high accuracy using as little CPU Time as possible, keeping into consideration the facts like lighting conditions, vehicle motion, noisy plates, and segmented words in the input image. The primary target of this thesis is to extract a clean image of license plates of private or community vehicles. Although we target our system to be able to detect standard license plates, we also tested our methods on non-standard plates. We have gained an overall accuracy of 98.41% in plate detection, 82.25% in plate extraction, and 94.11% in character segmentation, resulting in 76.19% overall accuracy using the available dataset. In terms of efficiency, the runtime of our plate detection module is 0.841 s, plate extraction is 0.132 s, character segmentation required 0.009 s, and the average total runtime of the entire system is 0.982 s, in our 64-bit machine having 4.00 GB main memory and Intel(R) Core (TM) i3-4005U CPU @ 2 × 1.70. In this paper, our aim is to process the input image up to Character Segmentation so that it is easy to recognize the character by sending it to any existing Optical Character Recognition (OCR) system.
Keywords: Digital image processing, Automated license plate recognition (ALPR), Automated number plate recognition (ANPR), Bangla number plate, Number plate detectionMore Info: https://link.springer.com/chapter/10.1007/978-981-19-3311-0_44