Barrier detection device and method

Abstract

The invention provides a barrier detection device based on pattern projection. The device comprises a pattern generator, an image sensor and a barrier detection component, wherein the pattern generator is used for projecting a pattern to a pavement; the image sensor acquires pavement image information with the pattern; the barrier detection component judges whether a barrier exists on the pavement by analyzing a change situation of the pattern in the acquired image. According to the device, a pattern projection mode is adopted during barrier detection, so that the complexity of barrier analysis and detection is greatly simplified, the cost is reduced, the robustness of barrier detection is improved, and the detection speed and the precision are improved.

Description

technical field [0001] The invention relates to obstacle detection technology, in particular to a device and method for detecting obstacles. Background technique [0002] A large part of human beings' acquisition of external environmental information comes from the visual system. Vision loss and visual disability have brought great difficulties to the lives of blind and visually impaired patients, especially for safe walking. In order to help the blind walk, in recent years, researchers at home and abroad have developed a variety of assistive walking systems for the blind using sensors such as ultrasonic, infrared, and cameras, among which obstacle detection is the core technology. Ultrasonic, infrared, etc. can only detect obstacles in a certain direction / height, but the method of collecting images through dual cameras to obtain the distance between the object and the camera has high computational complexity and consumes a lot of resources. An ideal obstacle detection syst...

AI Technical Summary

Problems solved by technology

However, the existing system is far from meeting the actual needs of obstacle detection in the process of safe walking for the blind in terms of function and performance.

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