A Synchronous Exposure Method and Image Acquisition Device

Abstract

The invention discloses a synchronous exposure method and image acquisition equipment. The image acquisition device of the present invention includes a depth camera and an RGB camera; the method of the present invention includes: when the depth image is started to be transmitted after the depth camera is exposed, the signal channel pre-established between the depth camera and the RGB camera is used to send the signal to the RGB camera. The camera sends a synchronous signal, and the synchronous signal is used to control the synchronous exposure of the RGB camera and the depth camera; the RGB camera uses the synchronous signal to calculate the exposure start time, and starts exposure when the exposure start time arrives And start to transmit the RGB image after the exposure, so that the depth camera and the RGB camera are exposed synchronously, so as to realize the synchronous transmission of the RGB image and the depth image. The technical scheme of the present invention can complete the synchronous exposure function of the depth camera and the RGB camera, realize the time alignment of the depth image and the RGB image, and avoid the dislocation between image frames caused by time accumulation.

Description

technical field [0001] The invention relates to a synchronous exposure method and image acquisition equipment. Background technique [0002] With the continuous development of current technology, people are constantly exploring new ways of human-computer interaction, especially in the biometric and automatic identification of machines. Recognition methods such as bone recognition and face recognition only rely on ordinary RGB images, which have many limitations in recognition accuracy and efficiency. Therefore, fusion based on depth cameras and RGB cameras is currently a better solution for machine recognition. [0003] The depth camera and the RGB camera need to complete the spatial alignment and time alignment of the two camera images during the image fusion process. The spatial alignment can complete the spatial correspondence between the two cameras through image calibration. For the time alignment of two common RGB cameras, a synchronization signal can be used to trigg...

AI Technical Summary

Problems solved by technology

However, for a depth camera and an ordinary RGB camera, due to the different imaging principles of the cameras, the exposure time cannot be unified. Using the same signal to complete the synchronization of the two cameras can trigger synchronous exposure, but it cannot To ensure subsequent transmission synchronization, due to the time difference caused by the difference in exposure and image transmission, the judgment conditions of each frame of image need to be set specifically according to the actual situation, which greatly increases the complexity of the design, and due to the widening of the time difference, frame loss occurs The probability of

At present, there is no mature synchronization solution for commercial depth cameras and RGB cameras, and the synchronization method for TOF depth cameras and RGB cameras is even blank

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