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Camera calibration system

A camera and calibration parameter technology, applied in the camera field, can solve problems such as distortion or double vision, and reduce user experience

Active Publication Date: 2019-02-05
META PLATFORMS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defects can cause serious problems in images generated by multi-camera systems that degrade the user experience, such as severe distortion or double vision

Method used

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Experimental program
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Embodiment Construction

[0059] system structure

[0060] figure 1 is a block diagram of the system environment 100 in which the camera calibration system 300 operates according to one embodiment. figure 1 The system environment 100 shown in FIG. 2 includes a camera rig system 200 , a camera calibration system 300 and a client VR device 180 . For illustrative purposes, the figure 1 Only one camera rig system 200, one camera calibration system 300 and one client VR device 180 are shown in FIG. In alternative implementations not shown, system environment 100 may include multiple camera rig systems 200, multiple camera calibration systems 300, multiple client VR devices 180, and different and / or other components. Likewise, the functions performed by various entities in system environment 100 may vary in different implementations.

[0061] Camera gantry system 200 is a multi-camera system designed to capture images and / or video of a localized area. The local area is the environment surrounding the ...

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Abstract

A camera calibration system jointly calibrates multiple cameras in a camera rig system. The camera calibration system obtains configuration information about the multiple cameras in the camera rig system, such as position and orientation for each camera relative to other cameras. The camera calibration system estimates calibration parameters (e.g., rotation and translation) for the multiple cameras based on the obtained configuration information. The camera calibration system receives 2D images of a test object captured by the multiple cameras and obtains known information about the test object such as location, size, texture and detailed information of visually distinguishable points of the test object. The camera calibration system then generates a 3D model of the test object based on the received 2D images and the estimated calibration parameters. The generated 3D model is evaluated in comparison with the actual test object to determine a calibration error. The calibration parameters for the cameras are updated to reduce the calibration error for the multiple cameras.

Description

Background technique [0001] The present disclosure relates generally to multi-camera systems, and more particularly, to calibrating cameras in multi-camera systems. [0002] Capturing images via a multi-camera system is necessary for a virtual reality (VR) system to render 3-dimensional (3D) images or video to a user wearing a head-mounted display (HMD). However, tolerances in the design and manufacture of multi-camera systems can cause the actual cameras to not be placed in the correct places or at the correct angles as designed. The cameras may translate laterally or vertically relative to each other, or be flawlessly oriented relative to each other. These defects can cause serious problems in images generated by a multi-camera system that degrade the user experience, such as severe distortion or double vision. [0003] Therefore, multi-camera systems need to be calibrated to render accurate images. [0004] Embodiments according to the present invention are particularly ...

Claims

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Application Information

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IPC IPC(8): G06T7/80H04N5/232G06T7/70
CPCG06T7/85H04N13/243H04N17/002H04N23/90G06T7/70G06T2207/30244H04N23/667H04N13/246H04N13/332
Inventor 布里安·基思·卡布拉尔阿尔贝特·帕拉·波索福里斯特·塞缪尔·布里格斯乔伊斯·许
Owner META PLATFORMS INC