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Depth Imaging by Combining Time-of-Flight and On-Demand Stereo [chapter]

Uwe Hahne, Marc Alexa
2009 Lecture Notes in Computer Science  
In this paper we present a framework for computing depth images at interactive rates. Our approach is based on combining time-of-flight (TOF) range data with stereo vision.  ...  The resulting depth images are more accurate than from either of the sensors.  ...  We combine the camera systems (time-of-flight and stereo) and fuse the data so that limitations of each of the individual sensors are compensated.  ... 
doi:10.1007/978-3-642-03778-8_6 fatcat:w6bd2gzxmbbwpjn2n7eghawt6e

Combining Time-Of-Flight depth and stereo images without accurate extrinsic calibration

Uwe Hahne, Marc Alexa
2008 International Journal of Intelligent Systems Technologies and Applications  
We combine a low resolution Time-Of-Flight (TOF) depth image camera based on Photonic Mixer Devices with two standard cameras in a stereo configuration.  ...  Reference to this paper should be made as follows: Hahne, U. and Alexa, M. (2008) 'Combining Time-Of-Flight depth and stereo images without accurate extrinsic calibration', Int. .  ...  We are using a similar approach of combining PMD and stereo depth.  ... 
doi:10.1504/ijista.2008.021295 fatcat:ickbe345wnd43nj7omko5xgxey

Feature-based visual odometry prior for real-time semi-dense stereo SLAM

Nicola Krombach, David Droeschel, Sebastian Houben, Sven Behnke
2018 Robotics and Autonomous Systems  
The goal of performing this task solely on a stereo pair of video cameras is highly demanding and bears conflicting objectives: on one hand, the motion has to be tracked fast and reliably, on the other  ...  In this work, we propose a two-layer approach for visual odometry and SLAM with stereo cameras that runs in real-time and combines feature-based matching with semi-dense direct image alignment.  ...  Acknowledgement This work has been supported by the German Federal Ministry for Economic Affairs and Energy (BMWi) in the Autonomics for Industry 4.0 project InventAIRy.  ... 
doi:10.1016/j.robot.2018.08.002 fatcat:ce5htdb5ijflbgr4hx7xsh4e4m

Single-Pixel Imaging and Its Application in Three-Dimensional Reconstruction: A Brief Review

Ming-Jie Sun, Jia-Min Zhang
2019 Sensors  
Whereas modern digital cameras use a pixelated detector array to capture images, single-pixel imaging reconstructs images by sampling a scene with a series of masks and associating the knowledge of these  ...  The research works of three-dimensional single-pixel imaging and their potential applications are further reviewed and discussed.  ...  Padgett, University of Glasgow, for inspiration. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s19030732 fatcat:5izjoh7bk5guhlq6ivdk7jiwka

A Survey on Time-of-Flight Stereo Fusion [chapter]

Rahul Nair, Kai Ruhl, Frank Lenzen, Stephan Meister, Henrik Schäfer, Christoph S. Garbe, Martin Eisemann, Marcus Magnor, Daniel Kondermann
2013 Lecture Notes in Computer Science  
In this survey paper, we give an overview over methods for the fusion of Time-of-Flight (ToF) and passive stereo data as well as applications of the resulting high quality depth maps.  ...  Due to the demand for depth maps of higher quality than possible with a single depth imaging technique today, there has been an increasing interest in the combination of different depth sensors to produce  ...  In [3] , Castañeda et al. present a system using two Time-of-Flight cameras. In this survey paper we will focus on techniques to fuse of Time-of-Flight and passive stereo data.  ... 
doi:10.1007/978-3-642-44964-2_6 fatcat:nyr7drt475gfhg5lcdbhs3kr3q

Optical MEMS devices for compact 3D surface imaging cameras

Sung-Pyo Yang, Yeong-Hyeon Seo, Jae-Beom Kim, Hyunwoo Kim, Ki-Hun Jeong
2019 Micro and Nano Systems Letters  
This article will overview the principles of major categories of 3D surface imaging techniques and their applications using optical MEMS devices for compact 3D surface imaging camera. which permits unrestricted  ...  Recently, various MEMS techniques enabled the fabrication of key optical elements for 3D surface imaging with compact size, reasonable cost, and high yield.  ...  After the rectification process of stereo images, depth information can be calculated by comparing the image pixel disparities of rectified stereo images.  ... 
doi:10.1186/s40486-019-0087-4 fatcat:fqli7vccuneijh3wvvoppisgoa

Disparity map generation for color image using TOF depth camera

Yun-Suk Kang, Yo-Sung Ho
2011 2011 3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV-CON)  
We propose an effective method for disparity map generation for a color image using a time-of-flight (TOF) depth camera.  ...  Index Terms-Time-of-flight camera, disparity map, depth map, 3DTV  ...  However, the result of stereo matching relies on the texture of input images and object placement of the scene in many times.  ... 
doi:10.1109/3dtv.2011.5877172 fatcat:qln725zkdffwhoinsu5xhv2yhy

Indoor and outdoor depth imaging of leaves with time-of-flight and stereo vision sensors: Analysis and comparison

Wajahat Kazmi, Sergi Foix, Guillem Alenyà, Hans Jørgen Andersen
2014 ISPRS journal of photogrammetry and remote sensing (Print)  
Based on these metrics, we analyze and compare depth imaging of leaf under indoor (room) and outdoor (shadow and sunlight) conditions by varying exposures of the sensors.  ...  In this article we analyze the response of Time of Flight cameras (active sensors) for close range imaging under three different illumination conditions and compare the results with stereo vision (passive  ...  Acknowledgments This work is supported by the Danish Council for Strategic Research under project ASETA ( grant no. 09-067027, the Spanish Ministry of Science and Innovation under projects  ... 
doi:10.1016/j.isprsjprs.2013.11.012 fatcat:qivcrkzgjvgcrpubih3qvd5taa

Design and Implementation of Digital Hologram Content Using Modified Depth Information

Scott Park, Hyun-Jun Choi, Moon-Seok Kim, Dong-Wook Kim, Young-Ho Seo
2014 Journal of information and communication convergence engineering  
in the three-dimensional positions of objects in the hologram or by combining the objects with other contents by means of changes in the depth information.  ...  This paper uses both the depth information obtained by converting the disparity information by using a stereo matching method and that obtained by taking pictures with a depth camera.  ...  Fig. 3 . 3 Depth and object size obtained by time-of-flight depth camera.  ... 
doi:10.6109/jicce.2014.12.2.122 fatcat:gtkcbt7j7nbajlx47burzi2wiq


Wu Bo-Yi, Zhang Ning, Su Guo-Zhong
2016 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
A set of key technologies dedicate to accuracy improvement in low altitude photogrammetry were analyzed in detail, namely the utilization of wide angle camera and low altitude flight, enhancement in image  ...  Based on the theoretic analysis of the accuracy in large scale photogrammetric mapping, some defects in traditional procedure were discussed.  ...  ACKNOWLEDGEMENTS This work was supported by Project of Comprehensive Detection Technology and Interpretation System of Airborne Geophysical and Remote Sensing with project number 2013AA063905, which belongs  ... 
doi:10.5194/isprs-archives-xli-b1-789-2016 fatcat:m7qdzvokyvax3jybmnpvqe2ary

Evaluation of 3D Vision Systems for Detection of Small Objects in Agricultural Environments

Justin Louedec, Bo Li, Grzegorz Cielniak
2020 Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications  
We evaluate the performance of two state-of-the-art 3D sensing technologies and showcase the differences between 2D and 3D networks trained on the images and point clouds of strawberry plants and fruit  ...  In this paper, we conducted a study on the application of modern 3D sensing technology together with the state-of-the-art machine learning algorithms for segmentation and detection of strawberries growing  ...  The Time-of-Flight Figure 2 : Comparison of depth captured using Stereo and Time-of-Flight technologies camera, on the other hand, can be programmed to capture information only in a given range depending  ... 
doi:10.5220/0009182806820689 dblp:conf/visapp/LouedecLC20 fatcat:5ztpb5kchvdyzeljqnpwfmreny

Depth Enhancement by Fusion for Passive and Active Sensing [chapter]

Frederic Garcia, Djamila Aouada, Hashim Kemal Abdella, Thomas Solignac, Bruno Mirbach, Björn Ottersten
2012 Lecture Notes in Computer Science  
In this work, we use recent depth enhancement filters intended for Time-of-Flight cameras, and adapt them to alternative depth sensing modalities, both active using an RGB-D camera and passive using a  ...  Given a depth map, either estimated by triangulation methods or directly provided by the sensing system, and its corresponding 2-D image, we correct the depth values by separately treating regions with  ...  Acknowledgements We would like to thank Isabelle Chesnay and Cecile Petit, for posing in our experiments for active sensing.  ... 
doi:10.1007/978-3-642-33885-4_51 fatcat:h2prdtlnbrczbbbac7i2rb6gea

Markerless Visual Control of a Quad-Rotor Micro Aerial Vehicle by Means of On-Board Stereo Processing [chapter]

Konstantin Schauwecker, Nan Rosemary Ke, Sebastian Andreas Scherer, Andreas Zell
2012 Informatik aktuell  
In a flight experiment, the MAV was capable to hover autonomously, and it was able to estimate its current position at a rate of 29 Hz and with an average error of only 2.8 cm.  ...  The only sensory input used by the MAV are the imagery from two cameras in a stereo configuration, and data from an inertial measurement unit.  ...  The total flight time was 45.7 s, of which we neglect the first 8.6 s and the last 3.1 s for take-off and landing. This leaves us an autonomous flight time of 33.9 s to analyze.  ... 
doi:10.1007/978-3-642-32217-4_2 dblp:conf/ams/SchauweckerKSZ12 fatcat:iuw3akkg45hxzbmw7lld2bsb3e

Image-guided ToF depth upsampling: a survey

Iván Eichhardt, Dmitry Chetverikov, Zsolt Jankó
2017 Machine Vision and Applications  
Recently, there has been remarkable growth of interest in the development and applications of Time-of-Flight (ToF) depth cameras.  ...  This has motivated many researchers to combine ToF cameras with other sensors in order to enhance and upsample depth images.  ...  This research was supported in part by the program "Highly industrialised region on the west part of Hungary with limited R&D capacity: Research and development programs related to strengthening the strategic  ... 
doi:10.1007/s00138-017-0831-9 fatcat:w2p3ebhysfarfk46phex753dxe

Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images

Yu Song, Chris A. Glasbey, Gerrit Polder, Gerie W.A.M. van der Heijden
2014 IET Computer Vision  
This paper 5 shows how stereo and Time-of-Flight (ToF) images can be combined for non-destructive automatic leaf area 6 measurements.  ...  In addition to 11 show that combining stereo and ToF images gives superior qualitative and quantitative results, 149 automatic 12 measurements on leaf area using our system in a validation trial have a  ...  Leaf Area Measurements by Stereo and Time-of-Flight Images pepper and tomato, the plants are simply too large to be transported.  ... 
doi:10.1049/iet-cvi.2013.0056 fatcat:ug6j5wnnszhkdjifqtw2s5j2qe
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