Fringe projection simulator

Author: rkej

August undefined, 2024

WebFringe projection simulation software for 3D shape measurements. Joris Dirckx. Three-dimensional measurements have become a common quality control technique in modern factories. Different measurement time requirements have lead to the development of different techniques such as laser line scanning, grid projection and Moiré profilometry. ... WebIn fringe projection profilometry, high-order harmonics information of distorted fringe will lead to errors in the phase estimation. In order to solve this problem, a point-wise phase estimation method based on a neural network (PWPE-NN) is proposed in this paper. The complex nonlinear mapping relationship between the gray values and the phase under …

High speed fringe projection for dynamic shape ... - ScienceDirect

WebMicrosoft Visual Studio Solution File, Format Version 11.00 # Visual Studio 2010: Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "Fringe Projection … WebThe ‘Fringe Projection Simulator’ is presented, a program which can simulate three commonly used fringe projection setups and is designed to support STL files, which enables the user to create a 3D model using … johnston community college early college

Fringe projection profilometry system verification for 3D …

WebJul 1, 2024 · Phase unwrapping is a very important step in fringe projection 3D imaging. In this paper, we propose a new neural network for accurate phase unwrapping to address the special needs in fringe projection 3D imaging. Instead of labeling the wrapped phase with integers directly, a two-step training process with the same network configuration is … WebOct 1, 2024 · In Section 3, we will present the proposed method in detail. After that, simulation and experimental results will be exhibited in Section 4. Finally, we summarise the paper with a conclusion in Section 5. 2 Related work 2.1 Phase computation. Fringe patterns use phase as the codewords, which are embedded in the captured patterns. WebDec 1, 2016 · Furthermore, we simulated the case when N=P step phase-shifting algorithm is applied to odd number fringe periods (i.e., P is an odd number). Fig. 3 (b) and (d) show the results as fringe period varies from 5 to 59 and S=3.0. Once again, the phase can be accurately recovered from the saturated patterns. 4. Experimental results how to go into property business

A novel fast 3D measurement method based on phase-coded fringe projection

Fringe projection profilometry system verification for 3D shape ...

WebSep 1, 2013 · In this paper, we present an algorithm based on geometric analysis to simulate fringe projection system (FPS), which avoid many difficult problems ray-tracing-based methods exist. One important issue for simulation of optical system is computing of intersection point between object's surface and straight-line (ray) originating from camera ... johnston community college parking passWebSimulation framework for fringe projection profilometry using ray tracing and light transport coefficient measurement johnston community college notary public

"WebNov 1, 2024 · Section 2 introduces the principles of the fringe projection decamouflaging, including the system setup, singular points extraction, and the detection of camouflaged objects. Section 3 presents a quantitative analysis of the proposed method utilizing simulation. Section 4 describes the experimental validations. " - Fringe projection simulator

Fringe projection simulator

Two-step phase-shifting fringe projection profilometry: intensity ...

WebOct 19, 2024 · Fringe projection profilometry (FPP) is a technique used for obtaining the three-dimensional shape of an object in fields such as reverse engineering, cultural … Web2 Proposed simulator using Unity 2.1 Simulation space in Unity The 3D CAD models and light sources can be located freely in the simulation space of Unity. In addition, Unity’s …

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WebMay 26, 2024 · Fringe projection profilometry is widely used in optical metrology, and fringe analysis is important to improve measurement accuracy. However, the fringe … WebCircular fringe projection profilometry (CFPP), as a branch of carrier fringe projection profilometry, has attracted research interest in recent years. Circular fringe Fourier transform profilometry (CFFTP) has been used to measure out-of-plane objects quickly because the absolute phase can be obtained by employing fewer fringes. However, the …

WebThe typical system for temporal fringe projection profilometry is shown in Fig. 1. In this system, the field of view along the x-axis is such that the fringe-phase interval is ϕ ∈ (− π, π), as indicated in the same figure. Download : Download high-res image (102KB) Download : Download full-size image; Fig. 1. WebJun 21, 2024 · Structured light projection techniques based on diffuse reflection are widely used for accurate, fast, contactless, and nondestructive optical 3D shape measurements. It cannot be utilized to measure uncooperative materials, i.e., materials with optical properties such as being glossy, transparent, absorbent, or translucent. Recently, it was shown that …

WebBoth computer simulation and experiment are carried out to demonstrate the validity of this technique. Digital fringe projection profilometry utilizes a digital video projector as a structured light source and thus gains great flexibility. However, the gamma nonlinearity of the video projector inevitably decreases the accuracy and resolution of ... WebPhase-shifting profilometry requires projection of sinusoidal fringes on a 3D object. We analyze the visibility and frequency content of fringes created by a sinusoidal phase grating at coherent illumination. We derive an expression for the intensity of fringes in the Fresnel zone and measure their visibility and frequency content for a grating that has been …

WebA structured-light 3D scanner is a 3D scanning device for measuring the three-dimensional shape of an object using projected light patterns and a camera system. [1] The light …

WebThe DLP projector can project high-resolution images, and, considering the requirements of projection resolution and color restoration degree, we selected the INFocus IN82 as the device to project the fringe pattern. The fringe pattern carrier frequencies are 1/21, 1/24, and 1/27, and the projected fringe pattern resolution is 1024 × 768. johnston community college coursesWebFringe projection (FP) is a fast, non-contact and non-destructive measurement technology, that allows for the rapid form measurement of engineering components. ... The research includes a theoretical investigation of the effects of vibration on FP measurements using a computational simulation technique, as well as an experimental study, which ... johnston community college eventsWebAug 1, 2024 · Fringe projection profilometry is widely used for three-dimensional (3D) measurements. System calibration is crucial to fringe projection systems, since it … johnston community college send transcriptsWebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. johnston community college ksWebA new two-step phase-shifting fringe projection profilometry is proposed. The slowly variable background intensity of fringe patterns is removed by the use of an intensity … how to go into root user linuxWebJun 25, 2024 · Nowadays, fringe projection profilometry is widely used in optical three-dimensional (3D) measurement. However, due to distortion, epipolar constraints are … johnston community college degreesWebA novel multi-frequency fringe projection profilometry is presented in this paper. Fringe patterns with multiple frequencies are projected onto an object by a digital micro-mirror device projector. johnston community college north carolina