Light array flashing system, camera time detection setting system and method

Abstract

A light array flashing system for camera time detection and / or setting, including: a light array, operable to turn on and off each light in a predetermined cycle according to a predetermined sequence of dot matrix states; a light array on / off controller , to control the on and off of each light in the light array. Further, the lights in the light array are LED lights, and all the LED lights are divided into N groups; the LED lights of each group flash in the manner of a marquee; there is a hierarchical relationship between groups, and only low-level groups complete a flashing cycle, and The adjacent high-level group can enter the next flashing state, and so on. The camera detects the shooting timing by shooting the light array and identifying the flickering state, and can adjust the shooting timing. The camera time detection and setting technology of the present invention is easy to deploy, easy to implement, and low in cost; it can achieve high time control accuracy, and its time control accuracy is only limited by the shortest exposure time of the camera; the control of the shooting time is to directly adjust the shooting picture time with high precision.

Description

technical field [0001] The present invention generally relates to computer vision technology, in particular to a lamp array flickering system, a camera time detection and setting system and method. Background technique [0002] Generally speaking, the typical frame rate of camera shooting is 30 frames per second, that is, the time difference between two frames is about 30 milliseconds. When multiple cameras are shooting, generally speaking, there is no strict time alignment relationship between cameras. , the exact time of the frame captured by each camera is actually different. For example, the time when the first camera shoots the first frame is the 0th millisecond, and the second frame is the 33rd millisecond, while the time when the second camera shoots the first frame may be the 11th millisecond, the second frame is the 44th millisecond, and the second frame is the 44th millisecond. Three cameras may take the first frame at the 7th millisecond and the second at the 40t...

AI Technical Summary

Problems solved by technology

[0005] 2) The pictures taken by multiple cameras need to be spliced. For example, if the street view shooting car is not shot synchronously in time, the picture splicing effect may be poor

[0009] 1) The composition of the hardware system is relatively complex, and it needs to be connected to the trigger signal line, and a trigger controller is used to realize the control, and the camera must have the function of being triggered by an external trigger

[0010] 2) There must be a delay from when the camera is triggered to when the camera actually captures the scene

If the hardware can guarantee that the delay is fixed, it can meet the expected shooting time control requirements, but if the hardware cannot guarantee that the delay is fixed, for example, it needs to be scheduled by the operating system of the internal firmware, etc., then the shooting time still cannot be controlled. achieve the desired goal

[0011] 3) The user of the multi-camera system does not have a detection method for whether the shooting time control of multiple cameras has reached the expected goal, and cannot be sure whether the expected time control goal has been achieved

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