Three-dimensional grating optical retinal chip and stimulus-adaptive robotic vision

1992 ◽  
Author(s):  
Norbert Lauinger
Keyword(s):  
Three Dimensional ◽  
Robotic Vision

Review of Three-Dimensional Imaging Techniques for Robotic Vision

2020 ◽  
Vol 57 (4) ◽  
pp. 040001
Author(s):  
卢荣胜 Lu Rongsheng ◽  
史艳琼 Shi Yanqiong ◽  
胡海兵 Hu Haibing
Keyword(s):  
Imaging Techniques ◽  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Robotic Vision

Trajectory Drift–Compensated Solution of a Stereo RGB-D Mapping System

2020 ◽  
Vol 86 (6) ◽  
pp. 359-372
Author(s):  
Shengjun Tang ◽  
Qing Zhu ◽  
You Li ◽  
Wu Chen ◽  
Bo Wu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Camera Tracking ◽  
Robotic Vision ◽  
Multiple Sensors ◽  
Pose Tracking ◽  
Localization And Mapping ◽  
Mapping System ◽  
Map Updating ◽  
Time Drift ◽  
Mapping Solution

Multiple sensors are commonly used for three-dimensional (3D)-mapping or robotic-vision applications, as they provide a larger field of view and sufficient observations to fulfill frame-registration and map-updating tasks. However, the data sequences generated by multiple sensors can be inconsistent and contain significant time drift. In this paper, we describe the trajectory drift–compensated strategy that we designed to eliminate the influence of time drift between sensors, remove the inconsistency between the sequences from various sensors, and thereby generate a coarse-to-fine procedure for robust camera-tracking based on two-dimensional–3D observations from stereo sensors. We present the mathematical analysis of the iterative optimizations for pose tracking in a stereo red, green, blue plus depth (RGB-D) camera. Finally, complex indoor scenario experiments demonstrate the efficiency of the proposed stereo RGB-D simultaneous localization and mapping solution. The results verify that the proposed stereo RGB-D mapping solution effectively improves the accuracies of both camera-tracking and 3D reconstruction.

scholarly journals Three-dimensional imaging through scattering media based on confocal diffuse tomography

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
David B. Lindell ◽  
Gordon Wetzstein
Keyword(s):  
Target Location ◽  
Single Photon ◽  
Imaging Techniques ◽  
A Priori ◽  
Three Dimensional ◽  
Autonomous Driving ◽  
Scattering Media ◽  
Fundamental Limits ◽  
Robotic Vision ◽  
Avalanche Diodes

Abstract Optical imaging techniques, such as light detection and ranging (LiDAR), are essential tools in remote sensing, robotic vision, and autonomous driving. However, the presence of scattering places fundamental limits on our ability to image through fog, rain, dust, or the atmosphere. Conventional approaches for imaging through scattering media operate at microscopic scales or require a priori knowledge of the target location for 3D imaging. We introduce a technique that co-designs single-photon avalanche diodes, ultra-fast pulsed lasers, and a new inverse method to capture 3D shape through scattering media. We demonstrate acquisition of shape and position for objects hidden behind a thick diffuser (≈6 transport mean free paths) at macroscopic scales. Our technique, confocal diffuse tomography, may be of considerable value to the aforementioned applications.

scholarly journals High-Resolution Underwater Robotic Vision-Based Mapping and Three-Dimensional Reconstruction for Archaeology

2016 ◽  
Vol 34 (4) ◽  
pp. 625-643 ◽  
Author(s):  
Matthew Johnson-Roberson ◽  
Mitch Bryson ◽  
Ariell Friedman ◽  
Oscar Pizarro ◽  
Giancarlo Troni ◽  
...  
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Robotic Vision ◽  
Dimensional Reconstruction

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

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