The Dynamic Photometric Stereo Method Using a Multi-Tap CMOS Image Sensor [PDF]
Sensors, 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 ...
Takuya Yoda +5 more
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Photometric Stereo-Based Depth Map Reconstruction for Monocular Capsule Endoscopy [PDF]
Sensors, 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
Yang Hao +6 more
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Photometric stereo data for the validation of a structural health monitoring test rig [PDF]
Data in BriefPhotometric stereo uses images of objects illuminated from various directions to calculate surface normals which can be used to generate 3D meshes of the object.
Jennifer Blair +9 more
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DRM-Based Colour Photometric Stereo Using Diffuse-Specular Separation for Non-Lambertian Surfaces [PDF]
Journal of Imaging, 2022 This paper presents a photometric stereo (PS) method based on the dichromatic reflectance model (DRM) using colour images. The proposed method estimates surface orientations for surfaces with non-Lambertian reflectance using diffuse-specular separation ...
Boren Li, Tomonari Furukawa
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Polarisation photometric stereo [PDF]
Computer Vision and Image Understanding, 2017 This paper concerns a novel approach to fuse two-source photometric stereo (PS) data with polarisation information for complete surface normal recovery for smooth or slightly rough surfaces. PS is a well-established method but is limited in application by its need for three or more well-spaced and known illumination sources and Lambertian reflectance ...
Gary Atkinson
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Three-Dimensional Reconstruction from Single Image Base on Combination of CNN and Multi-Spectral Photometric Stereo [PDF]
Sensors, 2018 Multi-spectral photometric stereo can recover pixel-wise surface normal from a single RGB image. The difficulty lies in that the intensity in each channel is the tangle of illumination, albedo and camera response; thus, an initial estimate of the normal ...
Liang Lu +4 more
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Summary study of data-driven photometric stereo methods
Virtual Reality & Intelligent Hardware, 2020 Background: A photometric stereo method aims to recover the surface normal of a 3D object observed under varying light directions. It is an ill-defined problem because the general reflectance properties of the surface are unknown.
Boxin Shi, Gang Pan, Qian Zheng
exaly +3 more sources
A Photometric Stereo Using Re-Projected Images for Active Stereo Vision System
Applied Sciences (Switzerland), 2017 In optical 3D shape measurement, stereo vision with structured light can measure 3D scan data with high accuracy and is used in many applications, but fine surface detail is difficult to obtain.
Minho Chang, Chang Minho
exaly +3 more sources
Latent Code Predictor for Accelerating Disparity Estimation in Stereo-Endoscopic Surface Reconstruction [PDF]
SensorsDisparity estimation from stereo-endoscopic images is critical for 3D reconstruction in minimally invasive surgery (MIS). However, surgical environments have inherent interference factors including soft tissue deformation, motion blur, and photometric ...
Jiawei Dang +4 more
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Speckle Skin‐Based Multimodal Tactile Perception for Fine Robotic Manipulation
Advanced Intelligent SystemsTactile sensing is crucial for providing physical interaction between the robotic hand and objects, enabling effective and safe grasping and manipulation. Vision‐based tactile sensors have gained increasing popularity due to their high spatial resolution
Jiayuan Zhang +6 more
doaj +2 more sources