Results 51 to 60 of about 12,022 (190)
A Comprehensive Real-World Photometric Stereo Dataset for Unsupervised Anomaly Detection
IEEE Access, 2022 Unsupervised anomaly detection is a technology that trains a model to detect anomalies using only normal data. One of the main challenges of anomaly detection is detecting defects that are not visible or obscured by lighting conditions.
Junyong Jung +3 more
doaj +1 more source
Photometric Depth Super-Resolution
, 2019 This study explores the use of photometric techniques (shape-from-shading and uncalibrated photometric stereo) for upsampling the low-resolution depth map from an RGB-D sensor to the higher resolution of the companion RGB image. A single-shot variational
Cremers, Daniel +4 more
core +3 more sources
Identifying the lights position in photometric stereo under unknown lighting
, 2021 Reconstructing the 3D shape of an object from a set of images is a classical problem in Computer Vision. Photometric stereo is one of the possible approaches.
Concas, A. +4 more
core
Advanced Robotics Research, EarlyView.Visual teach‐and‐repeat (VTR) navigation allows robots to learn and follow routes without building a full metric map. We show that navigation accuracy for VTR can be improved by integrating a topological map with error‐drift correction based on stereo vision.
Fuhai Ling, Ze Huang, Tony J. Prescott
wiley +1 more source
Single-image RGB Photometric Stereo With Spatially-varying Albedo
, 2016 We present a single-shot system to recover surface geometry of objects with spatially-varying albedos, from images captured under a calibrated RGB photometric stereo setup---with three light directions multiplexed across different color channels in the ...
Chakrabarti, Ayan, Sunkavalli, Kalyan
core +1 more source
Perspective Photometric Stereo with Shadows [PDF]
, 2013 High resolution reconstruction of 3D surfaces from images remains an active area of research since most of the methods in use are based on practical assumptions that limit their applicability. Furthermore, an additional complication in all active illumination 3D reconstruction methods is the presence of shadows, whose presence cause loss of information
Mecca, Roberto +3 more
openaire +1 more source
TacScope: A Miniaturized Vision‐Based Tactile Sensor for Surgical Applications
Advanced Robotics Research, EarlyView.TacScope is a compact, vision‐based tactile sensor designed for robot‐assisted surgery. By leveraging a curved elastomer surface with pressure‐sensitive particle redistribution, it captures high‐resolution 3D tactile feedback. TacScope enables accurate tumor detection and shape classification beneath soft tissue phantoms, offering a scalable, low‐cost ...
Md Rakibul Islam Prince +3 more
wiley +1 more source
Photometric Stereo Super Resolution via Complex Surface Structure Estimation
IEEE AccessPhotometric stereo, which derives per-pixel surface normals from shading cues, faces challenges in capturing high-resolution (HR) images in linear response systems.
Han-Nyoung Lee, Hak Gu Kim
doaj +1 more source
Ascertaining the Ideality of Photometric Stereo Datasets under Unknown Lighting
Algorithms, 2023 The standard photometric stereo model makes several assumptions that are rarely verified in experimental datasets. In particular, the observed object should behave as a Lambertian reflector, and the light sources should be positioned at an infinite ...
Elisa Crabu +3 more
doaj +1 more source
Versatile CRISPR‐Cas Tools for Gene Regulation in Zebrafish via an Enhanced Q Binary System
Advanced Science, EarlyView.This study introduces CRISPR‐Q, a transgenic CRISPR‐Cas system leveraging the QFvpr/QUAS binary expression platform in zebrafish. CRISPR‐Q overcomes previous challenges in achieving stable and efficient gene regulation. By enabling precise spatiotemporal control of transcript knockdown (CRISPR‐QKD) and gene activation (CRISPR‐Qa), it provides a ...
Miaoyuan Shi +13 more
wiley +1 more source