Virtual reality interaction method, device and system

A method for aligning exposure center points of multiple cameras in a Virtual Reality (VR) system, comprising:

• acquiring image data of a first type frame taken by the multiple cameras according to a preset frame rate, the first type frame being used for tracking an external object, and exposure parameters of each camera in a tracking process dynamically changing according to the change of the external object;
• adjusting Vertical Timing Size (VTS) data of the first type frame, the VTS data changing with the change of the exposure parameters so as to fix a time interval between an exposure center point of the first type frame and a Frame Synchronization Input (FSIN) synchronization signal in a VR system;
• acquiring image data of a second type frame taken by the multiple cameras according to the preset frame rate, the second type frame being used for tracking an optical handle, and the exposure parameters of each camera in a tracking process being consistent;
• and
• adjusting VTS data of the second type frame according to the VTS data of the first type frame, and fixing a time interval between an exposure center point of the second type frame and the FSIN synchronization signal so as to complete the alignment of exposure center points of the cameras,
• wherein the image data of the first type frame and the image data of the second type frame are acquired successively in a whole acquiring process and adjusting the VTS data of the second type frame according to the VTS data of the first type frame comprises:
• taking a sum of the value of the VTS data of the second type frame plus the value of the VTS data of the first type frame always as a same value in the whole acquiring process such that the image data of the first type frame and the second type frame can be stably output at a specific frame rate.