Journal ArticleDOI
Optimized stereo matching in binocular three-dimensional measurement system using structured light.
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An optimized stereo-matching method used in an active binocular three-dimensional measurement system that projects a binary fringe pattern in combination with a series of N binary band limited patterns and evaluates a similarity measure using logical comparison instead of a complicated floating-point operation.Abstract:
In this paper, we develop an optimized stereo-matching method used in an active binocular three-dimensional measurement system. A traditional dense stereo-matching algorithm is time consuming due to a long search range and the high complexity of a similarity evaluation. We project a binary fringe pattern in combination with a series of N binary band limited patterns. In order to prune the search range, we execute an initial matching before exhaustive matching and evaluate a similarity measure using logical comparison instead of a complicated floating-point operation. Finally, an accurate point cloud can be obtained by triangulation methods and subpixel interpolation. The experiment results verify the computational efficiency and matching accuracy of the method.read more
Citations
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Journal ArticleDOI
A novel hierarchical framework for human action recognition
TL;DR: This paper proposes a novel two-level hierarchical framework for 3D skeleton-based action recognition, in order to tackle the challenges of high intra-class variance, movement speed variability and high computational costs of action recognition.
Journal ArticleDOI
Binocular vision measurement using Dammann grating.
TL;DR: A novel three-dimensional profilometry using a binocular camera and a 64 × 64 Dammann grating for generation of a regular square laser array with advantages of low cost, low power, and small size and should be useful for practical applications.
Journal ArticleDOI
3-D face registration solution with speckle encoding based spatial-temporal logical correlation algorithm
TL;DR: A prototype of 2-D system consisting of two binocular measurement units that allows a full 3-D reconstruction by utilizing the advantages of a novel correlation algorithm and proposes a spatial-temporal logical correlation (STLC) stereo matching algorithm.
Journal ArticleDOI
Registration Algorithm for Point Cloud Based on Normalized Cross-Correlation
Yuan Huang,Feipeng Da +1 more
TL;DR: A registration algorithm based on neighborhood similarity for 3D point clouds collected by optical measurement and without prior information is proposed, which has high registration accuracy and is suitable for point cloud data obtained by laser and structured light acquisition.
Journal ArticleDOI
Characterisation of a multi-view fringe projection system based on the stereo matching of rectified phase maps
TL;DR: A method for characterising a multi-view fringe projection system which does not require the characterisation of the projector by determining the correspondences in the phase domain using the rectified unwrapped phase maps and triangulating the matched phase values to reconstruct the three-dimensional shape of the object.
References
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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
Overview of three-dimensional shape measurement using optical methods
TL;DR: An overview of 3-D shape measurement using various optical methods, and a focus on structured light tech- niques where various optical configurations, image acquisition technology, data postprocessing and analysis methods and advantages and limitations are presented.
Journal ArticleDOI
Structured-light 3D surface imaging: a tutorial
TL;DR: The high-speed and high-resolution pattern projection capability offered by the digital light projection technology may enable new generation systems for 3D surface measurement applications that will provide much better functionality and performance than existing ones in terms of speed, accuracy, resolution, modularization, and ease of use.
Journal ArticleDOI
Recent progresses on real-time 3D shape measurement using digital fringe projection techniques
TL;DR: The principles of the real-time 3D shape measurement techniques that were developed are presented, the most recent progresses that have been made in this field are summarized, and the challenges for advancing this technology further are discussed.
Proceedings ArticleDOI
A compact algorithm for rectification of stereo pairs
TL;DR: A linear rectification algorithm for general, unconstrained stereo rigs that takes the two perspective projection matrices of the original cameras, and computes a pair of rectifying projectionMatrices, compact and easily reproducible.