Direction calibration method and device for shooting equipment
A technology of shooting equipment and shooting direction, which is applied in the direction of using feedback control, etc., and can solve problems such as difficulty in keeping the direction range consistent and large changes in calibration accuracy
Active Publication Date: 2020-07-07
HUAWEI TECH CO LTD
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Problems solved by technology
However, because the electronic compass is affected by factors such as ambient temperature and magnetic field changes, the calibration accuracy of the direction changes greatly every time it is turned on.
Therefore, even if the installation position of the shooting device does not change, there will be a large difference in the range of directions covered by the shooting area each time it is turned on, that is, the direction covered by the shooting area determined by the shooting device after each restart scope is difficult to keep consistent
Method used
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[0029]Shooting equipment (for example: dome camera) can record scenes that occur in reality, and transfer the captured content to the corresponding storage device for storage as a factual basis to prevent and discover illegal acts. Therefore, shooting equipment is more and more widely used Deployed by individuals and businesses as part of their security efforts. Usually, the shooting device needs to determine the range of directions covered by its shooting area every time it is turned on and started, so as to determine the shooting area of the shooting device.
[0030] At present, shooting equipment usually uses its built-in electronic compass to calibrate the direction every time it is turned on to determine the direction range covered by the shooting area. The specific process may include: Rotate the lens to the reference position, then rotate the lens from the reference position to the reference direction indicated by the electronic compass, and combine the reference dire...
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The invention discloses a direction calibration method and device for shooting equipment, and the method comprises the steps: rotating a lens of the shooting equipment to a reference position when theshooting equipment is started once; rotating the lens from the reference position to the reference direction indicated by the electronic compass, so that not only is the coverage range of the shooting area of the shooting equipment determined, but also the calibration information of the shooting direction can be determined and recorded. Thus, a data basis is provided for subsequent calibration ofthe shooting direction when the shooting equipment is restarted; namely, when the shooting equipment is restarted subsequently, the shooting equipment is restarted. The recorded and fixed calibrationinformation of the shooting direction is directly used for calibrating the shooting direction of the shooting equipment; the shooting direction obtained after each time of restarting is accurate andconsistent, and the situation that the shooting direction determined after each time of restarting of the shooting equipment is inaccurate and inconsistent due to the fact that the reference directionindicated by the electronic compass is utilized to calibrate the shooting direction after each time of restarting of the shooting equipment and the calibration error of the electronic compass is introduced is avoided.
Description
technical field [0001] The present application relates to the field of video surveillance, in particular to a method and device for calibrating the direction of shooting equipment. Background technique [0002] For shooting equipment such as ball cameras, it is necessary to determine the range of directions covered by the shooting area when it is turned on, so as to realize the positioning of the shooting area. For example, a monitoring camera locates its own monitoring area according to the range of directions covered by the shooting area. At present, the shooting device usually uses the direction calibrated by the built-in electronic compass every time it is turned on to determine the direction range covered by the shooting area. However, since the electronic compass is affected by factors such as ambient temperature and magnetic field changes, the calibration accuracy of the direction changes greatly every time it is turned on. Therefore, even if the installation positi...
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IPC IPC(8): G05D3/12
CPCG05D3/12
Inventor 章恒师杨昆
Owner HUAWEI TECH CO LTD