Light Pose Calibration for Camera-light Vision Systems

06/27/2020
by   Yifan Song, et al.
0

Illuminating a scene with artificial light is a prerequisite for seeing in dark environments. However, nonuniform and dynamic illumination can deteriorate or even break computer vision approaches, for instance when operating a robot with headlights in the darkness. This paper presents a novel light calibration approach by taking multi-view and -distance images of a reference plane in order to provide pose information of the employed light sources to the computer vision system. By following a physical light propagation approach, under consideration of energy preservation, the estimation of light poses is solved by minimizing of the differences between real and rendered pixel intensities. During the evaluation we show the robustness and consistency of this method by statistically analyzing the light pose estimation results with different setups. Although the results are demonstrated using a rotationally-symmetric non-isotropic light, the method is suited also for non-symmetric lights.

READ FULL TEXT

page 1

page 4

research
09/09/2023

Probabilistic Triangulation for Uncalibrated Multi-View 3D Human Pose Estimation

3D human pose estimation has been a long-standing challenge in computer ...
research
08/01/2022

MV6D: Multi-View 6D Pose Estimation on RGB-D Frames Using a Deep Point-wise Voting Network

Estimating 6D poses of objects is an essential computer vision task. How...
research
07/01/2023

SyMFM6D: Symmetry-aware Multi-directional Fusion for Multi-View 6D Object Pose Estimation

Detecting objects and estimating their 6D poses is essential for automat...
research
12/08/2018

Deep ChArUco: Dark ChArUco Marker Pose Estimation

ChArUco boards are used for camera calibration, monocular pose estimatio...
research
03/27/2023

Human Pose Estimation in Extremely Low-Light Conditions

We study human pose estimation in extremely low-light images. This task ...
research
04/24/2023

Beyond the Pixel: a Photometrically Calibrated HDR Dataset for Luminance and Color Temperature Prediction

Light plays an important role in human well-being. However, most compute...
research
06/03/2019

Comparing two- and three-view Computer Vision

To reconstruct the points in three dimensional space, we need at least t...

Please sign up or login with your details

Forgot password? Click here to reset