Shooting system and shooting method

Abstract

The invention relates to a shooting system and a shooting method. A light-emitting device driven by an alternating driving signal is arranged close to the shooting system. The shooting system comprises a video frame driving signal generating unit and an image acquiring and generating unit, wherein the video frame driving signal generating unit is used for generating a video frame driving signal at the interval of N periods of a synchronization signal of a practical driving signal of the light-emitting device; N is an integer which is more than or equal to 1; the light-emitting device is arranged close to the shooting system; and the image acquiring and generating unit is used for acquiring video frames according to video frame driving signals so as to generating a video. In the shooting system and the shooting method, shooting is performed according to the frequency of the driving signal of the light-emitting device, so that a shot video is clear and the video brightness is stable.

Description

technical field [0001] The invention relates to the field of image acquisition, in particular to a camera system and a camera method. Background technique [0002] Since the common frequency of the power supply currently used in the world is 50 / 60Hz, there are many frequencies of camera video images. Especially in the field of high-definition, as the number of pixels is getting higher and higher, the frame rate is getting lower and lower. The frame rate can be, for example, 25 frames / s, 22.5 frames / s, 15 frames / s, 12.5 frames / s, 10 frames / s, 9 frames / s or 8 frames / s, etc. In applications in the field of video surveillance, how to synchronize video or captured images with external light sources becomes particularly important. [0003] figure 1 Shown is an energy change diagram of a light emitting device (for example, a signal lamp, a lighting device, etc.) within an exposure time. [0004] Because the video exposure is not synchronized with the external light source, in t...

AI Technical Summary

Problems solved by technology

[0005] For example, at present, many high-definition smart network cameras are used in the transportation field, and the light-emitting diode (LED for short) signal light is selected to avoid the synchronization problem of the camera video or captured pictures and the strobe LED light source, but the following problems exist in the use of the constant LED light : First of all, many signal lights at intersections have already been installed, and the cameras are limited by the LED tubes in the signal lights installed at the intersections, so they cannot adapt to all engineering applications; secondly, the power of the constant light tubes is relatively large, which wastes energy and pollutes the env

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