Long-distance moving object height measurement apparatus and method based on machine vision

Abstract

The invention discloses a long-distance moving object height measurement apparatus and method based on machine vision. The apparatus is mainly composed of a binocular vision synchronous acquisition system, an image data processing system, a wireless data transmission unit and a remote monitoring terminal. The image acquisition system of the apparatus can realize synchronous image acquisition by a binocular camera and provides accurate data for subsequent processing; the image processing system employs an FPGA and DSP structure, performs preprocessing on the data through an FPGA and then performs subsequent processing on the data through a DSP chip so as to reduce the DSP computation data amount and improves the real-time performance of the apparatus; in an image feature matching phase, a Harris angular point detector is employed for realizing feature extraction at a sub-pixel level so that the computation precision is improved; and in a height measuring phase, a BP neural network is taken as an error correction link so that the measurement precision is improved. The long-distance moving object height measurement apparatus and method based on the machine vision effectively solve the problem of height measurement of a moving object at a long distance.

Description

technical field [0001] The invention belongs to the field of machine vision measurement. A device and method designed for measuring the height of long-distance moving objects based on the principle of machine vision can be applied to limited high requirements such as maritime transportation, land transportation, and prevention of transmission lines being scraped by passing objects. field of. Background technique [0002] Machine vision uses computer to simulate human vision or intelligent behavior related to human vision, extracts information from acquired images, and recognizes the shape and motion of three-dimensional scenes and objects in the objective world. It has been widely used in real life. Binocular stereo vision technology is an important branch of machine vision. It is very similar to the human stereo perception process. It directly simulates the way human vision processes scenes, which is simple and reliable. The application prospect of binocular stereo vision ...

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Problems solved by technology

However, most of the current research is mainly carried out on passive collision avoidance, and there are few related researches on active collision avoidance measures.

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