Vehicle-mounted liquid crystal screen light guide plate defect visual detection method based on target detection network

Abstract

The invention relates to the technical field of image recognition, and particularly discloses a vehicle-mounted liquid crystal screen light guide plate defect visual detection method based on a target detection network, the method comprises the following steps: collecting a light guide plate image; preprocessing the image; establishing and training a first-stage target detection network, wherein the first-stage target detection network comprises a trunk feature extraction sub-network, a feature enhancement sub-network and a classification and regression sub-network; and defect detection: obtaining four effective feature layers through an image pyramid of the feature fusion sub-network by using a feature fusion mode, transmitting the four effective feature layers through the classification and regression sub-network to obtain a prediction result of the defect of the light guide plate, and displaying the prediction result in an upper computer. According to the method, the problems of imbalance of positive and negative samples, small defect detection rate, detection efficiency and the like are solved, a defect positioning task and defect existence classification are completed at the same time, a visual result is provided at the same time, and industrial application is achieved and realized.

Description

Technical field [0001] The present invention relates to the field of image recognition, and in particular, a visual detection method for a vehicle liquid crystal panel light on a target detection network. Background technique [0002] Light Guide Plate is the use of optical grade acrylic / PC plates, and then use high reflectance and non-absorbed high-tech materials, laser engraving, V-type cross grid, carved at the bottom surface of the optical stage, V-type cross grid with high reflectivity and high-tech materials with extremely high reflectivity and not absorbing. UV mesh printing technology is printed with a light guide point. The light guide plate is also an important part of the liquid crystal display backlight module. It is inevitable in its production process, and it will directly affect the display effect directly. According to the shape of the defect, the defect is divided into two categories: point defects and line defects. Point defects mainly refer to the point-like ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for visual detection of defects in the light guide plate of a vehicle-mounted liquid crystal screen based on a target detection network, which is used for automatic detection and classification of defects in the light guide plate, and solves the imbalance between positive and negative samples and the detection rate of small defects. and detection efficiency, while completing the task of locating defects and classifying the presence or absence of defects, and providing visualized results at the same time, achieving and realizing industrial applications

Images