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A GPS/INS/imaging system for kinematic mapping in fully digital mode [chapter]

Mohamed M. R. Mostafa, Klaus-Peter Schwarz
2000 International Association of Geodesy Symposia  
This approach eliminates the need for ground control to provide 3D position of objects that appear in the field of view of the system imaging component.  ...  This paper describes the development and testing of a multi-sensor system for kinematic mapping in fully digital mode.  ...  Acknowledgement Financial support for this research was obtained through an NSERC operating grant of the second author, an Egyptian scholarship of the first author as well as Graduate Research Scholarships  ... 
doi:10.1007/978-3-642-59742-8_54 fatcat:hjvmbuzlsndgfjb7u2gk5uw3n4

Ultrafast 3-D shape measurement with an off-the-shelf DLP projector

Yuanzheng Gong, Song Zhang
2010 Optics Express  
We have successfully reached 4,000 Hz rate (80 μs exposure time) 3-D shape measurement speed with an off-the-shelf DLP projector.  ...  Zhang, "Dynamic 3-D shape measurement method: A review," Opt. Laser Eng. 48, 191-204 (2010).  ...  this technique is inherently lower than those absolute calibration method; and (2) the measurement range is smaller.  ... 
doi:10.1364/oe.18.019743 pmid:20940869 fatcat:weenw4zieze2fk5onhrlu3godu

Camera calibration and performance evaluation of depth from defocus (DFD)

Tao Xian, Murali Subbarao, Kevin G. Harding
2005 Two- and Three-Dimensional Methods for Inspection and Metrology III  
Real-time and accurate autofocusing of stationary and moving objects is an important problem in modern digital cameras.  ...  In this paper, we present calibration methods and algorithms for these three factors. Their correctness and effects on the performance of DFD have been investigated with experiments.  ...  In order to implement DFD on offthe-shelf commercial digital cameras, these factors need to be calibrated and corrected. In this paper, we present new calibration methods for these three factors.  ... 
doi:10.1117/12.631194 fatcat:3bcjqd2p7rhrrk75holzpvyrki

Vicarious Radiometric Calibration of a Multispectral Camera on Board an Unmanned Aerial System

Susana Del Pozo, Pablo Rodríguez-Gonzálvez, David Hernández-López, Beatriz Felipe-García
2014 Remote Sensing  
This paper discusses the radiometric calibration process by means of a vicarious method applied to a high-spatial resolution unmanned flight using low-cost artificial and natural covers as control and  ...  Combinations of unmanned aerial platforms and multispectral sensors are considered low-cost tools for detailed spatial and temporal studies addressing spectral signatures, opening a broad range of applications  ...  The authors thank Jesús Ferná ndez-Herná ndez for kindly providing the UFLIP software. Furthermore, the authors would like to thank the reviewers for their helpful comments.  ... 
doi:10.3390/rs6031918 fatcat:kjdo2rvfwfbavminqu5rx345me

A New In-Camera Imaging Model for Color Computer Vision and Its Application

Seon Joo Kim, Hai Ting Lin, Zheng Lu, Sabine Süsstrunk, S. Lin, M. S. Brown
2012 IEEE Transactions on Pattern Analysis and Machine Intelligence  
From our analysis, we found a major limitation of the imaging model employed in conventional radiometric calibration methods and propose a new in-camera imaging model that fits well with today's cameras  ...  methods.  ...  Computational color constancy is inherently an ill-posed problem.  ... 
doi:10.1109/tpami.2012.58 pmid:22371428 fatcat:skeoipyvdzeelmgg2mzdy43fui

Digital and Conventional Film-Based Non-Metric Cameras: A Comparison of Performance in Structural Deformation Surveys

Abdullah S. Alsalman
2009 FES Journal of Engineering Sciences  
For the sake of consistency, the same photogrammetric network design, control configuration and self -calibrating bundle adjustment were used for data evaluation.  ...  This research work presents the results of an experiment concerned with a comparison of the performance of non-metric digital and non-metric film -based cameras for structural deformation surveys.  ...  or an on-screen method.  ... 
doi:10.52981/fjes.v4i1.43 fatcat:4va76qgvovfo7jibn6foxwwsve

High Dynamic Range Imaging and its Application in Building Research

Axel Jacobs
2007 Advances in Building Energy Research  
This article lays out the steps necessary to create HDR images, and highlights recent developments in the technology and its applications for building research.  ...  HDRI is a recent technology allowing for capturing images with a much extended dynamic range whose values represent real-world luminance rather than just arbitrary pixel values.  ...  If more control over the camera is required, or if the AEB feature will not cover the dynamic range of the scene, the only solution for a normal consumer digital camera is to control it through a computer  ... 
doi:10.1080/17512549.2007.9687274 fatcat:mcrfdavxircllh5s3az2vifrsu

Integrated Calibration and Management of Color, Tone, and Image Structure in a Digital Intermediate System

Nestor M. Rodriguez, Richard B. Wheeler
2008 SMPTE Motion Imaging Journal  
He holds 18 U.S. patents in fields such as camera sev autofocusing and exposure control systems, chemical and digital image processing, and image-quality modelling.  ...  An electronic camera system (ECS) can also be calibrated to the | PD metric to reproduce a particular camera film image lool method is similar to that performed for the data and telecine film s ners,  ... 
doi:10.5594/j15038 fatcat:xuvkfg7yungg7h22dr6kacx4qi


T. Tölg, G. Kemper, D. Kalinski
2016 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The test field area has about 30 Ground Control Points (GCPs), which enable a perfect scenario for a proper geometric evaluation of the cameras.  ...  The CMOS sensor has an ISO range of up to 6400, which enables short exposures instead of using FMC.  ...  When large format digital cameras replaced analog cameras, they usually offered TDI as a method of dealing with forward motion, while medium format cameras typically used fast shutter speeds (up to a 1  ... 
doi:10.5194/isprs-archives-xli-b1-121-2016 fatcat:5yo23groyzb75d5ftge6uvgmgm

True Images: A Calibration Technique to Reproduce Images as Recorded

Corey Manders, Steve Mann
2006 Eighth IEEE International Symposium on Multimedia (ISM'06)  
Techniques for calibrating digital cameras tonally as well as calibrating viewing devices are presented.  ...  Ultimately, the paper shows how the proposed methods of calibration for digital cameras and display devices results in the accurate representation of images.  ...  Using raw images allowed for proper linear filtering as well as easy retroactive gain control. The paper showed how to accurately calibrate a monitor using a "known" camera.  ... 
doi:10.1109/ism.2006.155 dblp:conf/ism/MandersM06a fatcat:mc2re4uf3za3hcamhxdei3ctjq

Practical photoquantity measurement using a camera

J. Dehos, É. Zéghers, L. Sarry, F. Rousselle, C. Renaud
2012 IET Image Processing  
This paper proposes a method for obtaining a more accurate measure of the light seen by a camera. Our method requires no specific calibration apparatus and only minimal supervision.  ...  Nevertheless, it is quite comprehensive, since it accounts for response function, exposure, vignetting, spatial non-uniformity of the sensor and colour balancing. Our method works in two steps.  ...  Acknowledgements This work is funded by the Audiovisual and Multimedia Program of the French Agency for Research (ANR-06-RIAM-001).  ... 
doi:10.1049/iet-ipr.2010.0130 fatcat:b2hdyo6tgrh7ne6ly4htiumi3m

An Innovative Method for Obtaining Consistent Images and Quantification of Histochemically Stained Specimens

Michael A. Linden, Gerald J. Sedgewick, Marna Ericson
2015 Journal of Histochemistry and Cytochemistry  
Using a single camera and microscope to obtain digital images of three stains, we show that microscope and camera systems inherently produce image-to-image variation.  ...  Obtaining digital images of color brightfield microscopy is an important aspect of biomedical research and the clinical practice of diagnostic pathology.  ...  Acknowledgments We would like to thank Huy Tran for his contributions to our study.  ... 
doi:10.1369/0022155415568996 pmid:25575568 pmcid:PMC4374058 fatcat:mylqb6fooje3tlwbrp6negwafu

Practical use of video imagery in nearshore oceanographic field studies

K.Todd Holland, R.A. Holman, T.C. Lippmann, J. Stanley, N. Plant
1997 IEEE Journal of Oceanic Engineering  
strategy for calibration of the camera model.  ...  The techniques are founded on the principles of photogrammetry, account for difficulties inherent in the use of video signals, and have been adapted to allow for flexibility of use in field studies.  ...  Image space errors for all four cameras were approximately one, and NCE values of order one suggest that the observed errors are consistent with noise inherent in the digitization.  ... 
doi:10.1109/48.557542 fatcat:c2h2oisdljcnfo6hizk4n2nimq

Using digital photography to study animal coloration

2007 Biological Journal of the Linnean Society  
Lovell for help with much of the project. C.A.P. was supported by BBSRC grants S11501 to D. J. Tolhurst and T.S.T., and S18903 to I.C.C., T.S.T., and J.C.P. M.S. was supported by a BBSRC studentship.  ...  The capacity for manual exposure control or, at the very least, aperture priority exposure.  ...  An over-riding principle to consider when using digital cameras for scientific purposes is that most digital cameras are designed to produce images that look good, not to record reality.  ... 
doi:10.1111/j.1095-8312.2007.00725.x fatcat:tmypffekpnhydm6wfnduuyxzya


J.-F. Ye, J.-R. Tsay
2020 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
This paper entails a methodological novelty and builds upon prior research on a wavelets-based model for digital camera self-calibration.  ...  Tests are done by using aerial images taken with a high-resolution metric digital aerial mapping camera.  ...  Also, we truly appreciate the GeoForce Technologies Co., Ltd, Taipei, Taiwan, for providing the aerial images taken with UltraCam Xp Wide Angle digital aerial camera over the calibration field for testing  ... 
doi:10.5194/isprs-archives-xliii-b1-2020-407-2020 fatcat:limpode3zfhmriwqp7quky7rki
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