Tire grounding area measuring method and device based on image feature extraction

Abstract

The invention discloses a tire grounding area measurement method, device and equipment based on image feature extraction and a computer readable storage medium. The method comprises the steps: obtaining an image of a target tire, extracting a feature map from the image, and generating a feature saliency map; calculating an optimal weight value of each feature saliency map according to a target tire in the image, and carrying out normalization processing on each optimal weight value; obtaining a saliency map of the image according to the feature saliency map and the corresponding optimal weight value after normalization processing, and performing threshold segmentation on the saliency map to obtain a tire area image; acquiring the width of the target tire and the contact length between the target tire and the ground according to the tire area image, and calculating the grounding area of the target tire according to the width and the contact length. According to the technical scheme disclosed by the invention, the ground contact area of the tire is automatically measured in a non-contact manner by acquiring the image of the target tire and processing the image of the target tire, so that the efficiency, accuracy and safety of tire ground contact area measurement are improved.

Description

technical field [0001] The present application relates to the technical field of vehicle measurement, and more specifically, relates to a method, device, equipment and computer-readable storage medium for tire contact area measurement based on image feature extraction. Background technique [0002] JTG E60-2008 stipulates that the equivalent circle diameter of the single wheel pressure transmission surface of a standard vehicle is 21.30±0.5cm in the "Highway Subgrade Pavement Field Test Regulations", and the equivalent circle diameter of the single wheel pressure transmission surface needs to be converted through the tire contact area. [0003] At present, the ground contact area of ​​tires is often measured by the following method: jack up the rear axle of the car on a flat and smooth hard road, spread a new piece of carbon paper and a piece of graph paper under the tire, drop the jack lightly, and then Lift the jack to print the tire footprint on the graph paper, and use t...

AI Technical Summary

Problems solved by technology

The above measurement process requires a lot of manpower and time, and when jacking up and unloading the jack, the operator needs to squat on the bottom of the car to operate, and when placing and taking out the carbon paper and graph paper, the operator needs to be close to the wheel, all of which increase Potential safety hazards for operators, and because the jack unloads at a faster speed, the vehicle is prone to impact, which makes the measured tire ground contact area too large

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