A review on vision-based analysis for automatic dietary assessment

W Wang, W Min, T Li, X Dong, H Li, S Jiang - Trends in Food Science & …, 2022‏ - Elsevier
Background: Maintaining a healthy diet is vital to avoid health-related issues, eg,
undernutrition, obesity and many non-communicable diseases. An indispensable part of the …

Automatic LiDAR-camera calibration of extrinsic parameters using a spherical target

T Tóth, Z Pusztai, L Hajder - 2020 IEEE International …, 2020‏ - ieeexplore.ieee.org
This paper investigates a novel calibration process of devices with different modalities,
which is a critical step of computer vision applications. We propose a fully automatic extrinsic …

Tame a wild camera: in-the-wild monocular camera calibration

S Zhu, A Kumar, M Hu, X Liu - Advances in Neural …, 2023‏ - proceedings.neurips.cc
Abstract 3D sensing for monocular in-the-wild images, eg, depth estimation and 3D object
detection, has become increasingly important. However, the unknown intrinsic parameter …

Calibration method for line-structured light vision sensor based on a single ball target

Z Liu, X Li, F Li, G Zhang - Optics and Lasers in Engineering, 2015‏ - Elsevier
Profile feature imaging for ball targets is unaffected by the position of the target. On this
basis, this study proposes a method for the rapid calibration of a line-structured light system …

Flexible and accurate camera calibration using grid spherical images

Z Liu, Q Wu, S Wu, X Pan - Optics express, 2017‏ - opg.optica.org
For important camera calibration in the field of computer vision, a new target form, namely, a
grid spherical target (GST) that is different from the spherical target, is proposed. The GST …

Unified intrinsic and extrinsic camera and LiDAR calibration under uncertainties

J Kümmerle, T Kühner - 2020 IEEE International conference on …, 2020‏ - ieeexplore.ieee.org
Many approaches for camera and LiDAR calibration are presented in literature but none of
them estimates all intrinsic and extrinsic parameters simultaneously and therefore optimally …

A stratified approach for camera calibration using spheres

KYK Wong, G Zhang, Z Chen - IEEE Transactions on Image …, 2010‏ - ieeexplore.ieee.org
This paper proposes a stratified approach for camera calibration using spheres. Previous
works have exploited epipolar tangents to locate frontier points on spheres for estimating the …

An adaptive grid search algorithm for fitting spherical target of terrestrial LiDAR

Y Shi, G Zhao, M Wang, Y Xu - Measurement, 2022‏ - Elsevier
The spherical target is critical in many terrestrial laser scanning applications. Accurately and
robustly estimating its geometric center based on a point cloud is a problem of widespread …

The common self-polar triangle of concentric circles and its application to camera calibration

H Huang, H Zhang, Y Cheung - Proceedings of the IEEE …, 2015‏ - cv-foundation.org
In projective geometry, the common self-polar triangle has often been used to discuss the
position relationship of two planar conics. However, there are few researches on the …

Practical and accurate calibration of RGB-D cameras using spheres

AN Staranowicz, GR Brown, F Morbidi… - Computer Vision and …, 2015‏ - Elsevier
Abstract RGB-Depth (or RGB-D) cameras are increasingly being adopted in robotic and
vision applications, including mobile robot localization and map**, gesture recognition …