Anti-shake device and method of video camera

Abstract

The invention discloses an anti-shake device and method of a video camera. The anti-shake device comprises a position sensor, a controller, a servo mechanism, an imaging device and a frame extraction device, the position sensor measures linear acceleration and angular acceleration caused by shaking of the video camera and transmits the linear acceleration and the angular acceleration to the controller, the linear acceleration and the angular acceleration caused by shaking can be converted into mobile distance and angle by the controller, the mobile distance and angle are then compared with the maximum distance and the maximum angle of moving of the imaging device, image frames with the moving distance and angle caused by shaking and exceeding the maximum distance and the maximum angle of moving of the imaging device is abandoned in advance, and on the premise of no influence on subjective feeling of videos, the image frames exceeding the set frame number are abandoned actively according to preset strategies, the servo mechanism is controlled to stop actions within the framing period of abandoning the image frames in advance and the frame extraction device is controlled to abandon the image frames to be abandoned. By the anti-shake device and method, operation time and distance of the servo mechanism are reduced, and servo accuracy requirements are lowered.

Description

technical field [0001] The invention belongs to the technical field of imaging, and in particular relates to a camera anti-shake device and an anti-shake method. Background technique [0002] Video surveillance is an important part of the security system. Video surveillance is widely used in many occasions because of its intuition, accuracy, timeliness and rich information content. In recent years, with the rapid development of computer, network, image processing and transmission technology, the popularization trend of video surveillance has become more and more obvious. In the video surveillance system, the anti-shake of the front-end equipment such as the camera is a very important link. If the anti-shake function of the camera is not perfect, it will directly cause the video image to be blurred and affect the video surveillance effect. [0003] In terms of camera anti-shake, there are currently three commonly used methods, namely lens anti-shake, imaging device anti-shak...

AI Technical Summary

Problems solved by technology

[0006] In particular, the imaging device adopts a rolling shutter camera, and the exposure time of one frame of image is long, so the servo system needs to work continuously during the entire frame interval.

If the non-working time is short, the probability of the servo system being disturbed by vibration and random noise is high, and the possibility of blurred images is also high

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