Results 81 to 90 of about 1,123 (167)

Average surface roughness evaluation using 3-source photometric stereo technique

International Journal of Metrology and Quality Engineering, 2016
This paper presents a technique for measuring surface roughness (Ra), using photometric stereo method. The method utilizes three or more images of the measured surface from the same viewpoint, taken sequentially under different illumination conditions ...
Somthong Thammarat, Yang Qingping
doaj   +1 more source

Inline Wear Detection in High-Speed Progressive Dies Using Photometric Stereo [PDF]

MATEC Web of Conferences
The progressive forming of complex components, including blanking, deep-drawing, and bending, represents an economically efficient sheet metal processing method.
Moske Jonas, Kutlu Hasan, Steinmeier Adrian, Groenewold Phil, Santos Pedro, Kuijper Arjan, Weinmann Andreas, Groche Peter   +7 more
doaj   +1 more source

Real-time stereo matching on CUDA using Fourier descriptors and dynamic programming

Computational Visual Media, 2019
Computation of stereoscopic depth and disparity map extraction are dynamic research topics. A large variety of algorithms has been developed, among which we cite feature matching, moment extraction, and image representation using descriptors to determine
Mohamed Hallek, Fethi Smach, Mohamed Atri   +2 more
doaj   +1 more source

On Generating Synthetic Datasets for Photometric Stereo Applications

Computers
The mathematical model for photometric stereo makes several restricting assumptions, which are often not fulfilled in real-life applications. Specifically, an object surface does not always satisfies Lambert’s cosine law, leading to reflection issues ...
Elisa Crabu, Giuseppe Rodriguez
doaj   +1 more source

Disparity estimation of stereo-endoscopic images using deep generative network

ICT Express
A novel disparity estimation pipeline is proposed for 3D reconstruction of dynamic soft tissues in minimally invasive surgery (MIS), which uses a deep generative network to learn manifold distributions of reasonable disparity maps from past stereo images
Bo Yang, Siyuan Xu, Lirong Yin, Chao Liu, Wenfeng Zheng   +4 more
doaj   +1 more source

ePoster

European Journal of Neurology, Volume 33, Issue S1, June 2026.
wiley   +1 more source

Optical imaging technology in colonoscopy: Is there a role for photometric stereo? [PDF]

World J Gastrointest Endosc, 2020
Shandro BM, Emrith K, Slabaugh G, Poullis A, Smith ML.   +4 more
europepmc   +1 more source

Fringe photometric stereo

Optica
In fringe projection profilometry (FPP), a high spatial frequency of fringe typically indicates powerful error suppression capability; however, it complicates phase unwrapping, necessitating a greater number of patterns and thus compromising the real-time performance of scanning. In this letter, we report a fringe photometric stereo (FPS) to completely
Geyou Zhang, Kai Liu, Shangcheng Qu, Ce Zhu   +3 more
openaire   +1 more source

Neural Multi-View Self-Calibrated Photometric Stereo without Photometric Stereo Cues

2025 IEEE/CVF International Conference on Computer Vision (ICCV)
We propose a neural inverse rendering approach that jointly reconstructs geometry, spatially varying reflectance, and lighting conditions from multi-view images captured under varying directional lighting. Unlike prior multi-view photometric stereo methods that require light calibration or intermediate cues such as per-view normal maps, our method ...
Xu Cao, Takafumi Taketomi
openaire   +2 more sources

Generalizable stereo depth estimation with masked image modelling

Healthcare Technology Letters
Generalizable and accurate stereo depth estimation is vital for 3D reconstruction, especially in surgery. Supervised learning methods obtain best performance however, limited ground truth data for surgical scenes limits generalizability.
Samyakh Tukra, Haozheng Xu, Chi Xu, Stamatia Giannarou   +3 more
doaj   +1 more source