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Publications (8)
Presented in this paper is an effective technique to acquire the three-dimensional (3D) digital images of the human face without the use of active lighting and artificial patterns. The technique is based on binocular stereo imaging and digital image correlation, and it includes two key steps: camera calibration and image matching. The camera calibr...
The 3D digital image correlation (DIC) is a very popular method for 3D shape and deformation measurements in the optics and mechanics fields. In general, the 3D DIC technique requires two calibrated cameras to simultaneously capture images of object from two different views. In practice, this can be challenging for fast- or high-speed measurements...
In recent years, improving and extending the capabilities of the three-dimensional (3D) imaging to fast-speed and high-accuracy performance has been a very active research topic. Although the latest advances may help provide real-time and high-resolution measurements, to simultaneously achieve high-accuracy performance is still a big challenge. In...
Digital Image Correlation (DIC) is a widely used technique in the optics and mechanics fields for shape and deformation measurements. However, it is normally not used to measure the 3D shapes of human faces because of the requirement of speckle-pattern fabrication. In this paper, we demonstrate that the 3D DIC can be employed to reconstruct 3D imag...
Digital image correlation and image registration or matching are among the most widely used techniques in the fields of experimental mechanics and computer vision, respectively. Despite their applications in separate fields, both techniques primarily involve detecting the same physical points in two or more images. In this paper, a brief technical...
In spite of the recent advances in 3D shape measurement and geometry reconstruction, simultaneously achieving fast-speed and high-accuracy performance remains a big challenge in practice. In this paper, a 3D imaging and shape measurement system is presented to tackle such a challenge. The fringe-projection-profilometry-based system employs a number...
3D 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 num...
A challenging task that has hampered the fully automatic processing of the digital image correlation (DIC) technique is the initial guess when large deformation and rotation are present. In this paper, a robust scheme combining the concepts of a scale-invariant feature transform (SIFT) algorithm and an improved random sample consensus (iRANSAC) alg...