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A solution to the inversion problem of scattering would offer aberration-free diffraction-limited 3D images without the resolution and depth-of-field limitations of lens-based tomographic systems. Powerful algorithms are increasingly being…

Full 3D estimation of human pose from a single image remains a challenging task despite many recent advances. In this paper, we explore the hypothesis that strong prior information about scene geometry can be used to improve pose estimation…

计算机视觉与模式识别 · 计算机科学 2021-12-10 Zhe Wang , Liyan Chen , Shaurya Rathore , Daeyun Shin , Charless Fowlkes

Learning-based 3D object reconstruction enables single- or few-shot estimation of 3D object models. For robotics, this holds the potential to allow model-based methods to rapidly adapt to novel objects and scenes. Existing 3D reconstruction…

Modeling hand-object manipulations is essential for understanding how humans interact with their environment. While of practical importance, estimating the pose of hands and objects during interactions is challenging due to the large mutual…

计算机视觉与模式识别 · 计算机科学 2020-04-29 Yana Hasson , Bugra Tekin , Federica Bogo , Ivan Laptev , Marc Pollefeys , Cordelia Schmid

A technique for object localization based on pose estimation and camera calibration is presented. The 3-dimensional (3D) coordinates are estimated by collecting multiple 2-dimensional (2D) images of the object and are utilized for the…

计算机视觉与模式识别 · 计算机科学 2021-08-24 Taha Hasan Masood Siddique , Muhammad Usman

We consider an inverse problem of location identification of small conductivity inhomogeneity inside a conductor via boundary measurements which occurs in the EIT (Electrical Impedance Tomography). For this purpose, we derive topological…

经典物理 · 物理学 2013-08-20 Won-Kwang Park

Image reconstruction in X ray tomography consists in determining an object from its projections. In many applications such as non destructive testing, we look for an image who has a constant value inside a region (default) and another…

数据分析、统计与概率 · 物理学 2007-05-23 A. Mohammad-Djafari

This work considers the optimization of electrode positions in head imaging by electrical impedance tomography. The study is motivated by maximizing the sensitivity of electrode measurements to conductivity changes when monitoring the…

数值分析 · 数学 2023-12-19 N. Hyvönen , A. Jääskeläinen , R. Maity , A. Vavilov

Thin structures, such as wire-frame sculptures, fences, cables, power lines, and tree branches, are common in the real world. It is extremely challenging to acquire their 3D digital models using traditional image-based or depth-based…

图形学 · 计算机科学 2020-05-21 Peng Wang , Lingjie Liu , Nenglun Chen , Hung-Kuo Chu , Christian Theobalt , Wenping Wang

Using the complementary wave- and particle-like natures of photons, it is possible to make ``interaction-free'' measurements where the presence of an object can be determined with no photons being absorbed. We investigated several…

量子物理 · 物理学 2009-10-31 Andrew G. White , Jay R. Mitchell , Olaf Nairz , Paul G. Kwiat

We propose a framework called ReFInE to directly obtain integral image estimates from a very small number of spatially multiplexed measurements of the scene without iterative reconstruction of any auxiliary image, and demonstrate their…

计算机视觉与模式识别 · 计算机科学 2016-01-28 Kuldeep Kulkarni , Pavan Turaga

We develop the analysis of x-ray intensity correlations from dilute ensembles of identical particles in a number of ways. First, we show that the 3D particle structure can be determined if the particles can be aligned with respect to a…

数据分析、统计与概率 · 物理学 2015-05-28 Veit Elser

A simple method of constructing the 3D surface of non-transparent micro-objects by extending the depth-of-field on the whole attainable surface is presented. The series of images of a sample are recorded by the sequential movement of the…

仪器与探测器 · 物理学 2009-04-15 V. V. Berejnov

Event-based imaging is a neurmorphic detection technique whereby an array of pixels detects a positive or negative change in light intensity at each pixel, and is hence particularly well suited to detecting motion. As compared to standard…

Ordinal embedding aims at finding a low dimensional representation of objects from a set of constraints of the form "item $j$ is closer to item $i$ than item $k$". Typically, each object is mapped onto a point vector in a low dimensional…

机器学习 · 计算机科学 2021-05-26 Aïssatou Diallo , Johannes Fürnkranz

There is only a handful of scanning techniques that can provide surface topography at nanometre resolution. At the same time, there are no methods that are capable of non-invasive imaging of the three-dimensional surface topography of a…

仪器与探测器 · 物理学 2017-03-07 Tatiana Latychevskaia , Wei-Hao Hsu , Wei-Tse Chang , Chun-Yueh Lin , Ing-Shouh Hwang

We explain how to build invisible isotropic conductivity perturbations of the unit conductivity in the framework of the point electrode model for two-dimensional electrical impedance tomography. The theoretical approach, based on solving a…

偏微分方程分析 · 数学 2014-12-23 Lucas Chesnel , Nuutti Hyvönen , Stratos Staboulis

In this work, we present and investigate the novel blind inverse problem of position-blind ptychography, i.e., ptychographic phase retrieval without any knowledge of scan positions, which then must be recovered jointly with the image. The…

图像与视频处理 · 电气工程与系统科学 2026-03-18 Simon Welker , Lorenz Kuger , Tim Roith , Berthy Feng , Martin Burger , Timo Gerkmann , Henry Chapman

Monocular 3D object detection task aims to predict the 3D bounding boxes of objects based on monocular RGB images. Since the location recovery in 3D space is quite difficult on account of absence of depth information, this paper proposes a…

计算机视觉与模式识别 · 计算机科学 2021-06-10 Yingjie Cai , Buyu Li , Zeyu Jiao , Hongsheng Li , Xingyu Zeng , Xiaogang Wang

Is it possible to detect a feature in an image without ever looking at it? Images are known to have sparser representation in Wavelets and other similar transforms. Compressed Sensing is a technique which proposes simultaneous acquisition…

图像与视频处理 · 电气工程与系统科学 2020-06-09 Suyash Shandilya