Photometric-Stereo-Based Defect Detection System for Metal Parts. [PDF]
Sensors (Basel), 2022 Automated inspection technology based on computer vision is now widely used in the manufacturing industry with high speed and accuracy. However, metal parts always appear in high gloss or shadow on the surface, resulting in the overexposure of the ...
Cao Y +6 more
europepmc +3 more sources
Combining Photogrammetry and Photometric Stereo to Achieve Precise and Complete 3D Reconstruction. [PDF]
Sensors (Basel), 2022 Image-based 3D reconstruction has been employed in industrial metrology for micro-measurements and quality control purposes. However, generating a highly-detailed and reliable 3D reconstruction of non-collaborative surfaces is still an open issue.
Karami A, Menna F, Remondino F.
europepmc +3 more sources
Photometric Stereo-Based Defect Detection System for Steel Components Manufacturing Using a Deep Segmentation Network. [PDF]
Sensors (Basel), 2022 This paper presents an automatic system for the quality control of metallic components using a photometric stereo-based sensor and a customized semantic segmentation network.
Saiz FA +3 more
europepmc +3 more sources
Example-Based Multispectral Photometric Stereo for Multi-Colored Surfaces. [PDF]
J Imaging, 2022 A photometric stereo needs three images taken under three different light directions lit one by one, while a color photometric stereo needs only one image taken under three different lights lit at the same time with different light directions and ...
Miyazaki D, Uegomori K.
europepmc +2 more sources
INVESTIGATING 3D RECONSTRUCTION OF NON-COLLABORATIVE SURFACES THROUGH PHOTOGRAMMETRY AND PHOTOMETRIC STEREO [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 3D digital reconstruction techniques are extensively used for quality control purposes. Among them, photogrammetry and photometric stereo methods have been for a long time used with success in several application fields.
A. Karami +3 more
doaj +2 more sources
Deep Photometric Stereo Network with Multi-Scale Feature Aggregation. [PDF]
Sensors (Basel), 2020 We present photometric stereo algorithms robust to non-Lambertian reflection, which are based on a convolutional neural network in which surface normals of objects with complex geometry and surface reflectance are estimated from a given set of an ...
Yu C, Lee SW.
europepmc +2 more sources
Color Photometric Stereo Using Multi-Band Camera Constrained by Median Filter and Occluding Boundary. [PDF]
J Imaging, 2019 One of the main problems faced by the photometric stereo method is that several measurements are required, as this method needs illumination from light sources from different directions.
Miyazaki D, Onishi Y, Hiura S.
europepmc +2 more sources
Three-Dimensional Reconstruction with a Laser Line Based on Image In-Painting and Multi-Spectral Photometric Stereo. [PDF]
Sensors (Basel), 2021 This paper presents a multi-spectral photometric stereo (MPS) method based on image in-painting, which can reconstruct the shape using a multi-spectral image with a laser line.
Lu L, Zhu H, Dong J, Ju Y, Zhou H.
europepmc +2 more sources
Photometric Stereo-Based Depth Map Reconstruction for Monocular Capsule Endoscopy. [PDF]
Sensors (Basel), 2020 The capsule endoscopy robot can only use monocular vision due to the dimensional limit. To improve the depth perception of the monocular capsule endoscopy robot, this paper proposes a photometric stereo-based depth map reconstruction method. First, based
Hao Y +6 more
europepmc +2 more sources
The Dynamic Photometric Stereo Method Using a Multi-Tap CMOS Image Sensor. [PDF]
Sensors (Basel), 2018 The photometric stereo method enables estimation of surface normals from images that have been captured using different but known lighting directions. The classical photometric stereo method requires at least three images to determine the normals in a ...
Yoda T +5 more
europepmc +2 more sources