A Single Camera Ranging Method

Abstract

The invention provides a single-camera ranging method. The single-camera ranging method comprises the following steps: S1, pasting a target image in front of a sampled object, and placing and starting a camera; S2, converting image information collected by the camera into a black-white image; S3, sampling the black-white image by using a micro processor, wherein M*N sampling points are taken; S4, defining the sampling points in a black image area as feature points, and calculating the average number of feature points in each row; S5, changing a relative distance between the camera and the sampled object, and repeating the steps S1 to S4; S6, establishing a database of a relationship between the relative distance and the average number of the feature points in each row, and obtaining a nonlinear approximate equation for the relative distance and the average number of the feature points in each row by using an MATLAB tool; S7, pasting the target image on the surface of the sampled object, calculating the average number of the feature points in each row in the black-white image generated by the sampled object, and substituting into the nonlinear approximate equation for the relative distance and the average number of the feature points in each row to obtain the relative distance between the sampled object and the camera.

Description

Technical field [0001] The invention relates to the field of distance measurement methods, in particular to a single camera distance measurement method. Background technique [0002] At present, the most common method of distance measurement using cameras is the binocular parallax method. This method uses two cameras to collect image data, and determines the point to the camera based on the parallax imaging of a certain point on the object in the two cameras However, the binocular parallax method has a high hardware cost and a large amount of calculation, and the ranging result is easily affected by the mismatch of feature points. The existing method of measuring the distance between two points with a single camera is usually a camera plus a laser transmitter. However, compared with ordinary light sources, laser transmitters are more expensive and cumbersome to operate. There are also methods to obtain distance information by moving the camera and trigonometric function calculati...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a single-camera ranging method, the purpose of which is to solve the problem of high cost of using a laser transmitter for ranging in the traditional ranging method, and also to solve the problem of complex ranging calculation methods using trigonometric function ranging methods. , and does not have good real-time performance

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