A VR device multi-camera exposure synchronization method

Abstract

The embodiment of the present invention discloses a multi-camera exposure synchronization method for a VR device. The method includes creating a device ID set and a dedicated queue for caching open streaming commands in advance according to hardware devices involved in exposure synchronization. The hardware devices include multiple cameras; After the cameras are all turned on, obtain the frame image request information; respond to the frame image request information and generate an open stream command, and judge whether the device corresponding to the open stream command is in the ID set; if so, cache the open stream commands one by one in the dedicated queue, And after the number of caches reaches the preset threshold, all the open-flow commands in the dedicated queue are sent to the multi-camera at the same time; the frame images sent by the multi-camera are received in a loop, and the convergence logic of the exposure time stamp difference is executed until the difference converges to the desired value Within the threshold range, the exposure synchronization is completed. The technical scheme of the present invention can more efficiently complete the exposure synchronization of the camera of the VR device, is short in time consumption, high in efficiency, and has a strong application prospect.

Description

technical field [0001] The invention relates to the technical field of VR equipment, in particular to a multi-camera exposure synchronization method for a VR equipment. Background technique [0002] With the development of science and technology, VR equipment has gradually entered people's field of vision. In VR devices, multiple cameras are mostly used to work together to track the spatial position of the handle controller. In order to ensure the high accuracy of the calculation results of the spatial position of the handle, it is necessary to ensure that the frame images generated by the multiple cameras used in real time should be exposed at the same time as possible, that is, the exposure start time, frame interval, and exposure time of multiple cameras parameters are nearly identical. If the exposures are out of sync, the result of the final handle spatial position calculation may be "by a thousand miles". Therefore, when using multiple cameras for handle tracking, i...

AI Technical Summary

Problems solved by technology

[0004] However, there are certain limitations in the current common methods of hardware synchronization and software synchronization:

If there is a millisecond-level deviation in the hardware signal (Vsync), or a frame drop occurs on a certain camera on the software side, it is easy to cause multiple cameras to experience out-of-sync exposure at the same time, and even cause multiple cameras to fail to continue to generate frame images , causing the entire camera system to crash

[0006] Second, the method of software synchronization is more robust, but it takes a long time

However, the time-consuming of 1000ms obviously cannot satisfy the VR experience, so the time-consuming problem of the current software synchronization method needs to be solved

[0008] To sum up, the current existing technology lacks a method that can efficiently realize the exposure synchronization of the camera of the VR device

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