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Image vanishing point recognition technology based mobile equipment attitude measurement method

A technology of mobile equipment and measurement methods, applied in the direction of measuring devices, surveying and navigation, instruments, etc., can solve the problems of being easily affected by the environment, reducing accuracy, accumulating errors, etc., achieving accuracy improvement, avoiding accumulative errors, and strong resistance effect of ability

Inactive Publication Date: 2015-08-19
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] The above two methods have their own advantages and disadvantages. The gyroscope integration method has high accuracy in a short period of time, but as time increases, there will be cumulative errors, and the accuracy will gradually decrease; the accelerometer method is easily affected by the environment and has lower accuracy.

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  • Image vanishing point recognition technology based mobile equipment attitude measurement method
  • Image vanishing point recognition technology based mobile equipment attitude measurement method
  • Image vanishing point recognition technology based mobile equipment attitude measurement method

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Embodiment Construction

[0032] The present invention will be further explained below in combination with specific embodiments and accompanying drawings.

[0033] see figure 1 , the mobile device takes a smart phone as an example, and the present invention includes the following steps:

[0034] 1) Use the mobile phone camera to shoot scenes with three mutually perpendicular straight lines such as building walls, wall corners, and ceilings. These artificial buildings have standard orientations and vertical relationships, and contain the direction information of the three coordinate axes of the spatial coordinate system;

[0035] 2) Use the method of machine vision to detect the edges of the photographs taken to obtain the line segments in the image, and then classify the line segments to obtain the required three types of line segments that are perpendicular to each other in three-dimensional space;

[0036] 3) Utilize these line segments and the image vanishing point detection algorithm to obtain the...

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Abstract

The invention relates to an image vanishing point recognition technology based mobile equipment attitude measurement method. The method comprises the following steps: shooting man-made regular objects such as indoor corners by using a mobile phone camera, extracting three-dimensional structure information by use of the vanishing point detection technology, correcting an inertial sensor module inside a mobile phone by use of the changes of the three-dimensional structures of different images, such as a gyroscope and an accelerometer; therefore, the measurement precision of the sensor is improved under a condition that the hardware is not additionally arranged, and accurate mobile phone attitude can be acquired; and besides, compared with the conventional method, the method can effectively prevent electromagnetic interferences such as an indoor television and a computer from interfering the accelerometer and the gyroscope, the integral accumulation error of the gyroscope is also avoided, and therefore, the measurement accuracy of the mobile phone attitude can be improved greatly.

Description

technical field [0001] The invention relates to the application fields of machine vision and electronic equipment, in particular to a mobile equipment attitude measurement method based on image vanishing point recognition technology. Background technique [0002] The attitude of the mobile phone refers to the precise 3D coordinates and orientation information of the mobile phone relative to the earth coordinate system. This information is vital to many mobile applications. Examples include mobile gaming, gesture and motion recognition, indoor navigation, and more. Accurate indoor positioning and navigation has become a hot issue in the field of scientific research and commercial applications in recent years. Among them, the use of internal sensors of mobile phones, such as accelerometers, gyroscopes, and compass for positioning is a commonly used method. However, to achieve accurate indoor positioning, it is necessary to measure the attitude of the mobile phone. At prese...

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Application Information

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IPC IPC(8): G01C21/20
CPCG01C21/206
Inventor 惠维高学广蒋志平杜立韩劲松赵季中
Owner XI AN JIAOTONG UNIV
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