Results 101 to 110 of about 12,022 (190)
(R)-evolution in the implementation of photometric stereo – Application to archaeology [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information SciencesThere are two main families of photographic 3D reconstruction methods. On the one hand, so-called geometric methods (photogrammetry), which use images of the scene taken from different viewpoints, are based on the principle of triangulation.
A. Laurent +6 more
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On Generating Synthetic Datasets for Photometric Stereo Applications
ComputersThe mathematical model for photometric stereo makes several restricting assumptions, which are often not fulfilled in real-life applications. Specifically, an object surface does not always satisfies Lambert’s cosine law, leading to reflection issues ...
Elisa Crabu, Giuseppe Rodriguez
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Disparity estimation of stereo-endoscopic images using deep generative network
ICT ExpressA novel disparity estimation pipeline is proposed for 3D reconstruction of dynamic soft tissues in minimally invasive surgery (MIS), which uses a deep generative network to learn manifold distributions of reasonable disparity maps from past stereo images
Bo Yang +4 more
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Neural Multi-View Self-Calibrated Photometric Stereo without Photometric Stereo Cues
We propose a neural inverse rendering approach that jointly reconstructs geometry, spatially varying reflectance, and lighting conditions from multi-view images captured under varying directional lighting. Unlike prior multi-view photometric stereo methods that require light calibration or intermediate cues such as per-view normal maps, our method ...
Cao, Xu, Taketomi, Takafumi
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Differentiable Display Photometric Stereo
2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)Photometric stereo leverages variations in illumination conditions to reconstruct surface normals. Display photometric stereo, which employs a conventional monitor as an illumination source, has the potential to overcome limitations often encountered in bulky and difficult-to-use conventional setups.
Choi, Seokjun +4 more
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Optical imaging technology in colonoscopy: Is there a role for photometric stereo? [PDF]
World J Gastrointest Endosc, 2020 Shandro BM +4 more
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Generalizable stereo depth estimation with masked image modelling
Healthcare Technology LettersGeneralizable and accurate stereo depth estimation is vital for 3D reconstruction, especially in surgery. Supervised learning methods obtain best performance however, limited ground truth data for surgical scenes limits generalizability.
Samyakh Tukra +3 more
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Variational perspective photometric stereo
, 2017 In this thesis we present a method to estimate the surface orientation of a 3D object. The general technique is called Photometric Stereo (PS) since we use several 2D images taken from the same location while the illumination changes for each image. Therefore, we use the varying intensities for each pixel to estimate the surface normal vector. In order
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Mobile robotic multi-view photometric stereo
ISPRS Journal of Photogrammetry and Remote SensingMulti-View Photometric Stereo (MVPS) is a popular method for fine-detailed 3D acquisition of an object from images. Despite its outstanding results on diverse material objects, a typical MVPS experimental setup requires a well-calibrated light source and a monocular camera installed on an immovable base.
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Improved Visual Inspection Through 3D Image Reconstruction of Defects Based on the Photometric Stereo Technique. [PDF]
Sensors (Basel), 2019 Huang S, Xu K, Li M, Wu M.
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