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Visible light blind guiding system based on time domain mental visual modulation, and hiding method

A technology of psychovisual modulation and blind guidance system, applied in the field of blind navigation, can solve the problem of high cost of blind guidance equipment, and achieve the effects of low hardware setting requirements, cost reduction, and simple technology

Inactive Publication Date: 2017-11-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a visible light blind-guiding system and concealment method based on time-domain psychovisual modulation that can detect road surface information and feed back, and solve the problem of high cost of existing blind-guiding equipment

Method used

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  • Visible light blind guiding system based on time domain mental visual modulation, and hiding method
  • Visible light blind guiding system based on time domain mental visual modulation, and hiding method
  • Visible light blind guiding system based on time domain mental visual modulation, and hiding method

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Embodiment 1

[0038] Such as Figure 1-Figure 4 As shown, a preferred embodiment of a visible light blind guide system based on time-domain psycho-visual modulation, the system includes an image projection module, a scene recognition module, and an information feedback module, wherein:

[0039] The image projection module is used to project a light spot with a frequency of 120Hz to the ground, and the specific content is as follows figure 2 As shown in (a) and (b), odd frames and even frames are displayed alternately. The image obtained by human eye sampling is the result of fusion of two frames in the gray domain, while camera sampling only controls exposure and interrupts exposure time. Obtain the picture of odd frames, the specific effect is as follows Figure 4 shown in the leftmost and middle columns of .

[0040] The scene recognition module is used to analyze the road surface information in the projection direction, obtain the projected image through camera sampling, and judge the...

Embodiment 2

[0053] Based on the above-mentioned system in Embodiment 1, a visible light hiding method based on time-domain psychovisual modulation is provided for the above-mentioned system, which is used to hide the light spots transmitted by the image projection device and avoid impact on the environment during use.

[0054] Specifically, the visible light hiding method is to perform time-domain psychovisual modulation on the light spots projected by the image projection device to achieve the effect of hiding the light spots, that is, the hiding of the light spots refers to the use of imaging between the human eye and the image sensor Due to the difference in principle, human eyes cannot see any light spots, but clear light spots can be obtained in images captured by an image capture device including an image sensor.

[0055] In this embodiment, the image projection device provides a refresh rate of 120Hz or higher, and the projected background is gray. In the linear spot area, the odd f...

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Abstract

The invention discloses a visible light blind guiding system based on time domain mental visual modulation, and a hiding method. The system comprises an image projection module used for projecting visible light to the ground to form projection light spots, wherein the light spots are almost invisible to normal human eyes; a scene recognition module used for analyzing pavement information on a projection direction of the image projection module, obtaining a projection image by sampling, judging the pavement condition by an analysis algorithm and transmitting the pavement condition to an information feedback module; and the information feedback module used for feeding back the pavement information obtained by the scene recognition module to a user through a sound signal and / or a vibration signal. According to the visible light blind guiding system, different pavement information is identified by the changes of the light spots of the visible light, thereby reducing the cost and the establishment difficulty of the blind guiding system, the complexity of the algorithm is reduced by an image analysis mode, the influence of the visible light emitted by the system to the outside is hidden by the time domain mental visual modulation, and meanwhile it is guaranteed that the necessary light spot information can be collected.

Description

technical field [0001] The invention relates to the field of navigation for the blind, in particular to a visible light blind guiding system and a hiding method based on time-domain psycho-visual modulation. Background technique [0002] Blind people are a special group in society. Due to visual defects, they cannot directly obtain visual information of the surrounding environment through their eyes, which makes them inconvenient in life, especially when they cannot judge road information when traveling, and are prone to falls. [0003] At present, blind people mainly rely on guide dogs or blind sticks for travel, and the training cost of guide dogs is too high and expensive; blind sticks need to keep hitting the ground, requiring blind people to process and analyze a lot of information. [0004] Some products with better blind-guiding effects on the market generally use a large number of sensors to feed back road surface information, and the price is relatively expensive. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/516H04N9/31
CPCH04B10/116H04B10/516H04N9/3141H04N9/3179
Inventor 陈远春翟广涛李想曾益张浩翔杨泽锐
Owner SHANGHAI JIAO TONG UNIV
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