Automatic 3D measurement of shape by grating projection method.

Shape measurement by the grating projection technique in a microscope

Automatic estimation of regularization parameter by active constraint balancing method for 3D inversion of gravity data

Gravity data inversion is one of the important steps in the interpretation of practical gravity data. The inversion result can be obtained by minimization of the Tikhonov objective function. The determination of an optimal regularization parameter is highly important in the gravity data inversion. In this work, an attempt was made to use the active constrain balancing (ACB) method to select the...

3D shape modeling by color phase stepping light projection

Color encoded phase-stepping light projection method is a new and promising technique for 3D shape modeling However, the 3D model acquired is often smeared by large error. The main cause of the error is color coupling amongst the three primary colors RGB. In this paper, we first analyzed the color-coupling problem. It is found that there is a strong coupling between G and R element. The couplin...

3D Profile Measurement by Color Pattern Projection and System Calibration

In this paper, we present a new color structured lighting for 3D profile measurement by projecting a pattern of color stripes. The advantage of using color pattern is that it simplifies the difficult matching problem of using a multiple-line stripe pattern. The problem of finding the correct color stripe correspondence between light source and images is solved by accurately calibrating the syst...

3D shape measurement based on projection of triangular patterns of two selected frequencies.

In this paper, a temporal shift unwrapping technique is presented for solving the problem of shift wrapping associated with spatial shift estimation (SSE)-based fringe pattern profilometry (FPP). Based on this technique, a novel 3D shape measurement method is proposed, where triangular patterns of two different spatial frequencies are projected. The patterns of the higher frequency are used to ...