Rotation angle detecting method

A technology of rotation angle detection and rotation vector, applied in the field of detection, can solve problems such as inability to detect any angle, and achieve the effect of overcoming limitations

Active Publication Date: 2012-06-20
UHDEVICE ELECTRONICS JIANGSU CO LTD
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for detecting the rotation angle, which uses image processing technology to detect the rotation angle, so as to solve the problem that any angle cannot be detected in the prior art

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Embodiment Construction

[0033] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0034] see figure 1 As shown, it is a schematic diagram of the distribution of the image sensor array used to implement the rotation angle detection method of the present invention. In this embodiment, the image sensor array is rectangular and is composed of image sensors R(00,00)... A 31*31 rectangular sensor array R composed of R(31, 31), of course, the size of the rectangular image sensor array R can be completely determined according to specific needs. In this way, the rectangular image sensor array can be used to obtain two frames of images of the external working surface or object surface (such as the working surface of an electronic device or a finger), respectively forming a reference frame and a sampling frame, and then performing a correlation operation through the sampling frame and the reference frame, Thereby obtain the motion vector o...

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Abstract

The invention provides a rotation angle detecting method, which comprises the steps as follows: two images are obtained through a rectangular sensor array, a reference frame and a sampling frame are formed, and a motion vector is obtained through a correlation operation of the sampling frame and the reference frame; part pixels of the sampling frame are selected to form a ring-shaped reference frame by using the center of the reference frame as a circle center; the ring-shaped reference frame comprises a plurality of reference blocks distributed in a ring shape; part pixels of the sampling frame are selected to form a ring-shaped sampling frame by using the center of the reference frame and a point determined by the motion vector; the ring-shaped sampling frame comprises a plurality of sampling blocks distributed in a ring shape; the ring-shaped reference frame and the ring-shaped sampling frame are rotationally displaced to obtain a first comparison frame and a second comparison frame; the first and the second comparison frame are subject to a correlation operation, the maximum correlation value is obtained, and the rotation vector corresponding to the maximum correlation value is calculated so as to detect the rotation vector and overcome limitations of the prior rotation detecting device. By using the rotation angle detecting method, a user can operate a controlled object at any angle.

Description

technical field [0001] The invention relates to a detection method, especially a method for detecting the rotation angle. Background technique [0002] The detection of the current rotation angle is mostly detected by the rotation sensor, and the rotation sensor also detects the magnitude of the mechanical deformation or the mechanical force, or judges the rotation angle through the change of the capacitance or resistance value. This method has shortcomings. The disadvantage is that the components are large in size and are not easy to install on some portable electronic devices. In the existing portable electronic devices, the rotation angle of the picture is usually fixed, that is, the direction of the electronic device is sensed by MEMS devices such as gravity sensors. , so that the picture is converted between the horizontal screen and the vertical screen display mode accordingly, that is, only a 90-degree transformation is performed, which cannot be applied to the applic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
Inventor 刘建
Owner UHDEVICE ELECTRONICS JIANGSU CO LTD
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