Journal ArticleDOI
Comparison of two-dimensional integration methods for shape reconstruction from gradient data
TLDR
In this work, three types of two-dimensional integration methods are compared under various conditions to provide suggestions in selection of a proper integration method for a particular application.About:
This article is published in Optics and Lasers in Engineering.The article was published on 2015-01-01. It has received 84 citations till now. The article focuses on the topics: Selection (genetic algorithm).read more
Citations
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Journal Article
What Is the Range of Surface Reconstructions from a Gradient Field
TL;DR: In this article, a generalized equation is proposed to represent a continuum of surface reconstruction solutions of a given non-integrable gradient field, where the range of solutions is related to the degree of anisotropy in applying weights to the gradient in the integration process.
Journal ArticleDOI
Review of phase measuring deflectometry
TL;DR: The fundamental principle and the basic concepts of PMD technique are introduced and followed by a brief overview of its key developments since it was first proposed to provide some suggestions for potential future investigations.
Journal ArticleDOI
Modal phase measuring deflectometry
TL;DR: In this work, a model based method is applied to phase measuring deflectometry, named modal phase measuring deflectionometry, and the pose of the screen relative to the camera is pre-calibrated and further optimized together with the shape coefficients of the surface under test.
Journal ArticleDOI
Three-Dimensional Shape Measurements of Specular Objects Using Phase-Measuring Deflectometry.
TL;DR: This work presents a review of the relevant techniques regarding classical and improved phase-measuring deflectometry, and discusses the challenges and future research directions to further advance PMD techniques.
Journal ArticleDOI
Wavefront sensing with a thin diffuser
TL;DR: A theoretical description of the resolution limit that is supported experimentally is provided, both for the few first Zernike polynomials and for phase-imaging applications requiring high resolution.
References
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Journal ArticleDOI
A method for enforcing integrability in shape from shading algorithms
Robert T. Frankot,Rama Chellappa +1 more
TL;DR: An approach for enforcing integrability, a particular implementation of the approach, an example of its application to extending an existing shape-from-shading algorithm, and experimental results showing the improvement that results from enforcingIntegrability are presented.
Journal ArticleDOI
Super-resolution through Error Energy Reduction
TL;DR: A computational procedure is devised which must reduce a defined ‘error energy’ which is implicit in the truncated spectrum and it is demonstrated that by so doing, resolution well beyond the diffraction limit is attained.
Journal ArticleDOI
Wave-front estimation from wave-front slope measurements
TL;DR: In this paper, the problem of wavefront estimation from wave-front slope measurements has been examined from a least-squares curve fitting model point of view, and a new zonal phase gradient model is introduced and its error propagator, which relates the mean square wavefront error to the noisy slope measurements, has been compared with two previously used models.
Journal ArticleDOI
History and Principles of Shack-Hartmann Wavefront Sensing
Ben C Platt,Roland Shack +1 more
TL;DR: Enhanced images of satellites are enhanced by inserting a beam splitter in collimated space behind the eyepiece and placing a plate with holes in it at the image of the pupil, which captures a snapshot of the atmospheric aberrations rather than to average over time.
Book
Numerical shape from shading and occluding boundaries
TL;DR: An iterative method for computing shape from shading using Occluding boundary information iteratively, using occluding boundaries information to supply boundary conditions and good initial values are found at certain points to help reduce the number of iterations required to reach a reasonable solution.