Intelligent mobile phone blind-guiding device and blind-guiding method

A technology of smart phones and blind guides, which is applied to devices that help people walk, telephone communications, electrical components, etc., can solve the problems of increased cost, no temperature sensor, and difficulty in promoting products, achieving good versatility and low cost Effect

Inactive Publication Date: 2011-03-16
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

However, ordinary mobile phones generally do not have infrared, laser and other distance sensors, nor do they have temperature sensors.
Therefore, in order to realize guide blindness, new equipment needs to be installed on existing mobile phones, and the cost increases
Moreover, the invention patent also applies to the local database, and the storage capacity of the mobile phone is quite

Method used

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  • Intelligent mobile phone blind-guiding device and blind-guiding method

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Embodiment Construction

[0040] image 3 The principle and method of distance measurement and calculation of space obstacles by a single mobile phone camera are illustrated. Specifically, it is based on the formula for calculating the image height of the photographic optical system:

[0041] y'=y*f' / x (2)

[0042] x is the distance from the object point to the main surface of the object in the direction of the optical axis, and f' is the focal length of the image. exist Figure 4 In , it is assumed that the object appears at position A, the distance between the person and the object is OA, and when the inclination angle of the optical system is θ, the distance AD ​​from A to the optical axis is the image height in the optical system with the optical axis as a reference. DP is x in formula (2), and f' is a fixed parameter of the optical system. Put the length of DP and AD into the formula (2) to get the image height y', and then divide the height of y' by the size of each photosensitive element to ...

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Abstract

The invention discloses an intelligent mobile phone blind-guiding device, comprising a mobile phone camera module, an embedded mobile phone processor, a software module, a mobile phone wireless signal emitting and receiving module, an input and output interactive module and a back ground server, wherein the mobile phone camera module comprises a mobile phone pick-up lens and an image sensor; the embedded mobile phone processor and the software module comprise an embedded processor and an embedded operating system of a mobile phone as well as application software running on the embedded operating system; and the application software is blind-guiding software. Feature analysis is carried out on collected images through a machine vision technology, and the features of field images are matched with obstacle parameters in a background database by using an artificial intelligence technology, thereby achieving recognition and position interpretation of barriers and using voice and vibratory modes to prompt a blind person to move. The blind-guiding device of the invention is in common use and is low in cost, and has functional expansibility and upgrading capabilities.

Description

technical field [0001] The invention relates to a blind guide technology, in particular to a blind guide technology and a blind guide method controlled by a mobile phone embedded system. Background technique [0002] As we all know, mobile phones have become indispensable electronic products in people's lives. With the increasing processing power of embedded processors, the combination of machine vision technology, sensor technology, wireless transmission technology and artificial intelligence technology on the hardware platform of mobile phones has enabled smart phones to develop many advanced functions and applications for better Meet the needs of people's lives. [0003] Using new technologies to develop disability-assisting products for the disabled is an industry with potential development potential. According to statistics in 2005, China is the country with the largest number of blind people in the world, with about 5 million blind people, accounting for 18% of the t...

Claims

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Application Information

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IPC IPC(8): H04M1/725A61H3/06H04M1/72481
Inventor 杨泱张欢赵鼎陈立王晓萍岑兆丰李晓彤
Owner ZHEJIANG UNIV
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