Results 51 to 60 of about 1,123 (167)
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 +3 more sources
Advanced Intelligent Systems, EarlyView.A lightweight monocular perception framework generates high‐fidelity depth maps and integrates YOLOv8 detection to estimate object‐wise distances from a single RGB image. Evaluated on KITTI and the proposed D‐Far250 dataset, the system demonstrates accurate long‐range perception up to 250 m while maintaining real‐time performance, enabling scalable ...
Faseeh Muhammad +5 more
wiley +1 more source
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
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
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
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
Ontogenetic Sequence of Differential Gene Expression in Predator‐Induced Daphnia pulex
Molecular Ecology, Volume 35, Issue 13, July 2026.ABSTRACT In response to predators, many Daphnia species develop inducible morphological defenses. These traits are phenotypically plastic, meaning their production is suppressed in the absence of the predator. While previous studies have identified several neurohumoral factors and candidate genes involved in the development of the defenses, the ...
Andrey Rozenberg +5 more
wiley +1 more source
CONSERVATION MONITORING OF A HERITAGE CEILING BY PHOTOMETRIC STEREO [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 Photographic survey techniques were employed to monitor the condition of the paintwork on the ceiling of the Queen's Staircase at Hampton Court Palace. Illumination was provided by a flash, mounted on an 8 metre telescopic mast, raised to approximately ...
L. MacDonald, I. Gibb, S. Robson
doaj +1 more source
Rotatable Lens‐Based 3D Reconstruction Method for Monocular Vision Systems
SmartBot, Volume 2, Issue 2, June 2026.Accurate 3D reconstruction in confined environments remains challenging because conventional vision‐based measurement systems are difficult to maintain compactness without sacrificing accuracy. Here, the authors develop a rotatable lens‐based monocular vision system, which is the first time using the refraction of the light induced by a rotating wedge ...
Puchen Zhu +11 more
wiley +1 more source
Mastcam‐Z Spectrophotometric Properties of Materials at the Van Zyl Overlook, Jezero Crater
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract During Sols 63–65 of Mars 2020, Mastcam‐Z multispectral (442–1022 nm) images were acquired at Van Zyl Overlook (VZO), spanning phase angles from ∼0° to 150°, to model photometric parameters for seven surface units. These units included rocks, soils, regolith, and rover tracks near the Jezero landing site.
B. Margara +6 more
wiley +1 more source