Journal ArticleDOI
Accurate 3D shape measurement of multiple separate objects with stereo vision
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TLDR
The proposed technique is capable of performing a full-field 3D shape measurement with high accuracy even in the presence of discontinuities and multiple separate regions.Abstract:
D shape measurement has emerged as a very useful tool in numerous fields because of its wide and ever-increasing applications. In this paper, we present a passive, fast and accurate 3D shape measurement technique using stereo vision approach. The technique first employs a scale-invariant feature transform algorithm to detect point matches at a number of discrete locations despite the discontinuities in the images. Then an automated image registration algorithm is applied to find full-field point matches with subpixel accuracy. After that, the 3D shapes of the objects can be reconstructed according to the obtained point matching and the camera information. The proposed technique is capable of performing a full-field 3D shape measurement with high accuracy even in the presence of discontinuities and multiple separate regions. The validity is verified by experiments.read more
Citations
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Journal ArticleDOI
Automatic phase aberration compensation for digital holographic microscopy based on deep learning background detection
TL;DR: A novel method that combines a supervised deep learning technique with convolutional neural network (CNN) and Zernike polynomial fitting (ZPF) and allows for ZPF to compute the self-conjugated phase to compensate for most aberrations is proposed.
Journal ArticleDOI
Digital image correlation in experimental mechanics and image registration in computer vision: Similarities, differences and complements
TL;DR: It is shown that some concepts from the image registration or matching technique can be applied to the digital image correlation technique to substantially enhance its performance, which can help broaden the applications ofdigital image correlation in scientific research and engineering practice.
Journal ArticleDOI
3D shape, deformation, and vibration measurements using infrared Kinect sensors and digital image correlation.
TL;DR: An effective technique that employs the Kinect sensors for accurate 3D shape, deformation, and vibration measurements is introduced using the RGB-D sensors, an accurate camera calibration scheme, and area- and feature-based image-matching algorithms.
Journal ArticleDOI
A modified virtual point model of the 3D DIC technique using a single camera and a bi-prism
Lifu Wu,Jianguo Zhu,Huimin Xie +2 more
TL;DR: In this article, a modified virtual point (MVP) model based on the analysis of light refraction in the prism using a backward ray-tracing method was proposed for 3D morphology and displacement measurements.
Journal ArticleDOI
Multi-camera calibration method based on a multi-plane stereo target.
TL;DR: A multi-camera calibration method capable of calibrating the intrinsic and extrinsic parameters of four cameras using only a single captured image per camera using a multi-plane stereo target containing multiple fixed planes to which coded patterns are attached is presented.
References
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Journal ArticleDOI
Distinctive Image Features from Scale-Invariant Keypoints
TL;DR: This paper presents a method for extracting distinctive invariant features from images that can be used to perform reliable matching between different views of an object or scene and can robustly identify objects among clutter and occlusion while achieving near real-time performance.
Journal ArticleDOI
Random sample consensus: a paradigm for model fitting with applications to image analysis and automated cartography
TL;DR: New results are derived on the minimum number of landmarks needed to obtain a solution, and algorithms are presented for computing these minimum-landmark solutions in closed form that provide the basis for an automatic system that can solve the Location Determination Problem under difficult viewing.
Book
Multiple view geometry in computer vision
Richard Hartley,Andrew Zisserman +1 more
TL;DR: In this article, the authors provide comprehensive background material and explain how to apply the methods and implement the algorithms directly in a unified framework, including geometric principles and how to represent objects algebraically so they can be computed and applied.
Journal ArticleDOI
A flexible new technique for camera calibration
TL;DR: A flexible technique to easily calibrate a camera that only requires the camera to observe a planar pattern shown at a few (at least two) different orientations is proposed and advances 3D computer vision one more step from laboratory environments to real world use.
Journal ArticleDOI
A taxonomy and evaluation of dense two-frame stereo correspondence algorithms
TL;DR: This paper has designed a stand-alone, flexible C++ implementation that enables the evaluation of individual components and that can easily be extended to include new algorithms.