Results 71 to 80 of about 153,707 (188)
Sensors, 2021 Direct visual odometry algorithms assume that every frame from the camera has the same photometric characteristics. However, the cameras with auto exposure are widely used outdoors as the environment often changes. The vignetting also affects the pixel’s
Yinming Miao, Masahiro Yamaguchi
doaj +1 more source
Evaluation of Stereo Matching Costs on Images with Radiometric Differences [PDF]
, 2009 Stereo correspondence methods rely on matching costs forcomputing the similarity of image locations. We evaluate the insensitivity of different costs for passive binocular stereo methods with respect to radiometric variations of the input images.
Hirschmüller, Heiko, Scharstein, Daniel
core
, 2013 The analysis of surface and texture details with the help of changes in illumination direction is a key task in 3D shape reconstruction either based on Photometric Stereo, Shape from Shading or Structured Light.
Petrou, Maria +7 more
core +1 more source
Review of Gastrointestinal Capsule Robots: Materials, Actuation, Diagnostics, and Therapeutics
Advanced Science, EarlyView.This review examines gastrointestinal capsule robots through a systems engineering lens, covering shell materials, actuation and localization strategies, diagnostic modalities, therapeutic interventions, and commercialization status. By mapping the complete technological chain from fabrication to clinical deployment, this work identifies critical gaps ...
Zengsheng Li +8 more
wiley +1 more source
Photometric Stereo by Hemispherical Metric Embedding [PDF]
Journal of Mathematical Imaging and Vision, 2017 Photometric Stereo methods seek to reconstruct the 3d shape of an object from motionless images obtained with varying illumination. Most existing methods solve a restricted problem where the physical reflectance model, such as Lambertian reflectance, is known in advance. In contrast, we do not restrict ourselves to a specific reflectance model. Instead,
Ofer Bartal +3 more
openaire +4 more sources
Photometric stereo for strong specular highlights
Computational Visual Media, 2018 Photometric stereo is a fundamental technique in computer vision known to produce 3D shape with high accuracy. It uses several input images of a static scene taken from one and the same camera position but under varying illumination. The vast majority of
Maryam Khanian +2 more
doaj +1 more source
FLSea: Underwater Visual–Inertial and Stereovision Forward‐Looking Data Sets
Journal of Field Robotics, EarlyView.ABSTRACT Visibility underwater is challenging and degrades as the distance between the subject and the camera increases. That is why forward‐looking underwater computer vision tasks are difficult. We have collected underwater forward‐looking stereovision and visual–inertial image sets using two underwater imaging platforms, a stereo camera rig, and an ...
Yelena Randall +2 more
wiley +1 more source
Dynamic photometric stereo - A new technique for moving surface analysis
, 2005 This paper describes a novel approach for two- and three-dimensional surface data capture from moving surfaces based upon an evolution of the existing photometric stereo (PS) technique.
Smith, Lyndon N., Smith, Melvyn L.
core +1 more source
Demultiplexing Colored Images for Multispectral Photometric Stereo via Deep Neural Networks
IEEE Access, 2018 Recovering fine-scale surface shapes is a challenging task in computer vision. Multispectral photometric stereo is one of the popular methods as it can handle non-rigid/moving objects and produces per-pixel dense results.
Yakun Ju +4 more
doaj +1 more source
Democratising Multi‐Projector Displays
Computer Graphics Forum, EarlyView.Spatially augmented reality (SAR) transforms large, surround, collaborative experiences out of VR/AR headsets to the real world by merging content from projectors with the physical environment. This detailed state‐of‐the‐art survey reports on the advancements in multi‐projector aggregation and hardware technologies used to achieve SAR and build ...
Aditi Majumder, Muhammad Twaha Ibrahim
wiley +1 more source