Electronic blind guide instrument based on machine vision

Abstract

The invention discloses an electronic blind guide instrument based on machine vision. The device takes a blind guide stick as a main body, a raspberry development board is arranged below a handle, anda camera is located in front of the handle and obliquely placed at a certain angle. According to a circular motion law, the camera is located in the circle center position of a handle and receives smaller force, deviation of a detection body from an image acquisition range due to larger displacement can be avoided after a use method is mastered, secondly, instead of being placed at the bottom ofthe blind guide stick, the camera can obtain a larger field of view, and meanwhile, the image accuracy of the camera only depends on the resolution of an image sensor and is slightly influenced by thedistance.

Description

technical field [0001] The invention belongs to the application field of machine vision technology, and relates to a design scheme of the application direction of machine vision technology in electronic blind guide equipment. Background technique [0002] Machine vision technology is a branch of artificial intelligence that is developing rapidly. Simply put, machine vision is the use of machines instead of human eyes for measurement and judgment. Through machine vision products (that is, image capture devices, which are divided into CMOS and CCD), the captured target is converted into an image signal, and sent to a dedicated image processing system to obtain the shape information of the captured target. According to the pixel distribution and brightness, color, etc. The information is transformed into digital signals; the image system performs various operations on these signals to extract the characteristics of the target, and then controls the on-site equipment actions ac...

AI Technical Summary

Problems solved by technology

[0003] Due to the large detection range of the ultrasonic sensor, it can only judge whether there are obstacles in the range, which makes the user only judge whether there are obstacles in the general direction and cannot know the specific location, which cannot be of great help to practical applications.

The infrared sensor is divided into two categories, one is a range sensor, such as the near field to determine whether there is an object, the detection distance of this type of sensor is too short; the other type of laser sensor, through the beam reflection to determine whether there is an obstacle, its disadvantages The detection range is too narrow because it can only judge obstacles on the optical path

As a result, high-end electronic guides mostly use cameras as image sensors to collect environmental information, but such research groups mostly pursue to restore the visual function of the blind, which is extremely difficult to develop and expensive, making the penetration rate very low

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