Image distance measurement method based on marker

Abstract

The invention discloses an image distance measurement method based on a marker. The method comprises the following steps: (S100) setting the marker meeting image acquisition requirements on a target object in advance; (S200) acquiring a target object image with the complete marker through a camera device, and extracting a marker image from the target object image by adopting an image processing technique; (S300) converting according to an imaging principle of the marker image by utilizing the marked camera device to complete distance measurement. The method is ingenious in design. By research on the imaging principle, the image processing process is introduced in monocular distance measurement; the method obtains accurate required data by setting the marker easy to identify and utilizing accurate extraction of a computer on the marker image, so that the high-precision distance measurement is easily and effectively realized. Compared with current multi-view distance measurement, the method significantly reduces the quantity and investment of the camera device, does not needs additional sensors and greatly reduces cost and power consumption of equipment. Compared with the current laser distance measurement, the method can still realize high-accuracy distance measurement without precise direction positioning.

Description

[0001] technical field [0002] The invention belongs to the technical field of monocular distance measurement, and in particular relates to an image distance measurement method for a target object with markers based on a calibrated camera device under a non-contact condition. Background technique [0003] Monocular ranging, also known as single-camera ranging, usually uses the size of the target to obtain the object distance according to the relationship between image distance, object distance, target size, and image size. The imaging principle is as follows: figure 1 As shown, the following formula is the calculation formula in the general monocular ranging process: [0004] [0005] The process of measuring the distance of the target can be achieved through the above formula. [0006] In the existing non-contact ranging technology, the most widely used theories and methods are mainly multi-eye ranging and laser ranging. In Wang Yifan's "A Fast Parallax Ranging Method...

AI Technical Summary

Problems solved by technology

The parameters in the calculation of trinocular distance measurement are small, and the results obtained have large errors, which can only be used for fuzzy measurement

Although laser ranging has high precision, its directionality is very strong, the divergence is very low, and the cost is relatively high

How to simultaneously solve the problems of large resource consumption and insufficient precision in multi-eye ranging, as well as the problems of too strong targeting and too low divergence in laser ranging, has always been a key research issue for those skilled in the art, but at present No breakthrough research progress has been published

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