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Hybrid camera system and its time calibration method and device

A hybrid camera and time calibration technology, applied in the field of computer vision, can solve problems such as time stamp alignment, achieve accurate calibration, and avoid the effect that the system cannot be used

Active Publication Date: 2020-06-19
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two cameras are separate hardware and there is no unified hardware trigger, so the time stamps of the recorded information cannot be aligned by hardware, which needs to be solved

Method used

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  • Hybrid camera system and its time calibration method and device
  • Hybrid camera system and its time calibration method and device
  • Hybrid camera system and its time calibration method and device

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Embodiment Construction

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] The hybrid camera system and its time calibration method and device proposed according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the hybrid camera system and its time calibration method proposed by the embodiments of the present invention will be described with reference to the accompanying drawings.

[0035] figure 1 It is a flowchart of a hybrid camera system and its time calibration method according to an embodiment ...

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Abstract

The invention discloses a hybrid camera system and its time calibration method and device, wherein the method includes: building a hybrid camera system; running the hybrid camera system, and recording events captured by an event-based camera and videos captured by the camera; acquiring camera captures The pixel changes between adjacent frames of the video; the number of events captured by the event-based camera is summed according to the video frame rate interval; The cross-correlation coefficient of the number; obtain the time difference between the event-based camera and the camera to obtain the time alignment result, and then complete the time calibration. This method can accurately calibrate the time relationship between the event-based camera and the ordinary camera, avoids the error caused by the time asynchrony of the data source from causing the system to be unusable, and can make the hybrid camera system operate stably and normally.

Description

Technical field [0001] The present invention relates to the technical field of computer vision, in particular to a hybrid camera system and a time calibration method and device thereof. Background technique [0002] When drones perform tasks, GPS (Global Positioning System, Global Positioning System) and other auxiliary positioning devices are not highly accurate in urban environments. The best way to solve the GPS problem is visual navigation, which is to use a camera attached to the drone to continuously take images, and complete positioning and navigation through image processing. However, a camera that only relies on a normal frame rate can easily cause image motion blur due to the excessive speed of the drone during shooting, resulting in large deviations in the position estimation results, which may cause problems with the drone's flight control algorithm and cause crashes, etc. accident. [0003] In current UAV applications equipped with visual positioning devices, due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80H04N5/04H04N5/247H04N5/76H04N23/90
CPCH04N5/04H04N5/76G06T7/80G06T2207/10016H04N23/90
Inventor 李一鹏朱奕霖戴琼海
Owner TSINGHUA UNIV
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