License plate super-resolution processing method and system based on deep learning

Abstract

The invention discloses a license plate super-resolution processing method and system based on deep learning. The method includes the following steps: acquiring a series of images containing license plate information from an original compressed surveillance video; tracking a target of interest in the images; selecting a plurality of points of interest, intercepting images with the points of interest as the center, and registering the images; and using a deep learning training base to get a corresponding deep network weight, and carrying out super-resolution processing on the multiple frames of images after registration with use of the deep network weight to get a clear high-definition license plate I. The intrinsic relationship between degraded characters and clear characters in a highly compressed surveillance video is learned through joint optimization using a super-resolution deep network model and a gradient guide network model. Super resolution and a de-blocking effect are achieved through a common deep network. The resolution of degraded character is improved, and the block effect is removed. The problem that the license plate characters in a highly compressed surveillance video cannot be seen clearly is solved.

Description

technical field [0001] The present invention relates to a digital video image processing method, in particular to a deep learning-based license plate super-resolution processing method and system. Background technique [0002] In recent years, our country has entered a period of rapid social development, and the domestic security situation is severe. In order to maintain social stability and ensure the safety of people's lives and properties, the state has invested 300 billion yuan to implement safe city video surveillance projects in many cities across the country, and established a relatively complete video surveillance system. Surveillance cameras film and record various scenes that have happened in the past and present in the surveillance area. On the one hand, it leaves clues for future criminal investigations and evidence for civil disputes; on the other hand, it deters various criminals and prevents various criminal activities. The license plate is the most valuable...

AI Technical Summary

Problems solved by technology

However, the existing super-resolution technology based on deep learning is known to consider the super-resolution of ideal images and videos, and there are few studies on high-compression images and videos.

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