Method and device for acquiring camera rotation angle

Abstract

The invention is applicable to the field of imaging and provides a method for obtaining a rotation angle of a camera. The method comprises the following steps: obtaining a first sampling value collected by a Hall sensor and a second sampling value collected by a magnetic calibration sensor; according to the corresponding relations between the rotation angle and the preset first sampling value and between rotation angle and the preset second sampling value, finding out the rotating angles corresponding to the collected first sampling value and the collected second sampling value. According to the invention, the strength of an interference magnetic signal can be obtained at the current scene through the second sampling value, and the rotation angle of the camera actually corresponding to the first sampling value can be obtained through the strength of the interference magnetic signal, so that the precision of the rotating angle, measured in the magnetic field environment, of the camera can be improved, therefore, the camera is better controlled to rotate.

Description

technical field [0001] The invention belongs to the field of imaging, and in particular relates to a method and a device for acquiring the rotation angle of a camera. Background technique [0002] In order to improve the convenience of taking pictures of smart terminals, many smart terminals are now equipped with rotating cameras, which can conveniently acquire images from multiple perspectives while keeping the position of the terminal unchanged. For example, rotating cameras are arranged in many mobile phones at present. [0003] When using a rotating camera to take pictures, the camera needs to be rotated. At present, the commonly used rotation operation control is realized by Hall sensor. The size of the magnetic field of the magnet on the rotating camera is sensed by the Hall sensor. During the rotation of the camera, the distance between the magnet and the Hall sensor is different, so the sampling value obtained by the Hall sensor is also different. Through this valu...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for obtaining the rotation angle of the camera to solve the problem that the existing technology is easily disturbed by the magnetic field. When the electromagnetic environment of the mobile phone is different, the value collected by the Hall sensor is also different. As a result, the accuracy of the camera angle value obtained through the sampling value obtained by the Hall sensor is not high

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