Self-adaptive license plate character segmentation method in complex scene

Abstract

The invention provides a self-adaptive license plate character segmentation method in a complex scene. The method comprises the steps of 1, obliquely correcting a license plate, 2, prelocating the interval position between the second character and the third character, and using the projection texture characteristics and combining the aspect ratio of the license plate to set multi-criteria judgment to simply and quickly search the interval position between the second character and the third character to provide stable and reliable initial position judgment information of the next step of character segmentation, and segmenting the license plate characters. Furthermore, in order to enable character segmentation to be more accurate, 0 element sections meeting the criterions are searched to update the segmentation character width and the interval width between the characters, and the character width parameters are updated again according to the searched position of the middle character. Thus, the defect that the single character is instable to segment is effectively overcome. The method can adjust segmentation parameters adaptively by quickly and accurately searching the interval position between the second character and the third character, so that the license plate characters can be segmented stably and reliably. In addition, the roughness in the complex environment is strong.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, relates to theoretical knowledge related to computer vision and pattern recognition, and is applied to the license plate recognition technology. technical background [0002] With the rapid development of computer application technology and artificial intelligence research, image processing technology is urgently needed in many fields. The system is a key technology in the intelligent transportation system. The license plate is the only identification of the vehicle, and the correct identification of the license plate has many practical significances. License plate character segmentation technology is the key link of the entire license plate recognition system. This link divides the characters in the license plate after positioning into single characters. Only by correctly segmenting the license plate can it lay the foundation for the next character recognition. If the character...

AI Technical Summary

Problems solved by technology

This method has high requirements on the color information of the license plate area. When the environment is complex or the distance is long, the license plate character segmentation effect is poor and the calculation efficiency is slow.

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