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Feature extraction from two consecutive traffic images for 3D wire frame reconstruction of vehicleHe, Xiaochen. January 2006 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
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Accurate camera position determination by means of moiré pattern analysisZuurmond, Gideon Joubert 03 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2015. / English abstract: We introduce a method for determining the position of a camera with accuracy
beyond that which is obtainable through conventional methods, using a single
image of a specially constructed calibration object. This is achieved by analysing the moiré pattern that emerges when two high
spatial frequency patterns are superimposed, such that one pattern on a plane is
observed through another pattern on a second, semi-transparent parallel plane,
with the geometry of both the patterns and the planes known. Such an object
can be created by suspending printed glass over printed paper or by suspending
printed glass over a high resolution video display such as an OLED display or
LCD.
We show how the camera’s coordinate along the axis perpendicular to the
planes can be estimated directly from frequency analysis of the moiré pattern
relative to a set of guide points in one of the planes. This method does not require
any prior camera knowledge. We further show how the choice of the patterns allows,
within limits, arbitrary accuracy of this coordinate estimate at the cost of a
stricter limit on the span along that coordinate for which the technique is usable.
This improved accuracy is illustrated in simulation.
With a sufficiently accurate estimate of the camera’s full set of 3D coordinates,
obtained by conventional methods, we show how phase analysis of the moiré
pattern in relation to the guides allows calculation of a new estimate of position
in the two axes parallel to the planes. This new estimate is shown in simulation
to offer significant improvement in accuracy. / Afrikaanse opsoming: Ons stel ’n metode bekend om die posisie van ’n kamera te bepaal met akkuuraatheid
bo dit wat verkrygbaar is uit konvensionele metodes, deur gebruik te
maak van ’n spesiaal gekonstrueerde kalibrasievoorwerp.
Die metode berus op analise van moiré patrone wat onstaan waneer twee hoë
ruimtelike frekwensie patrone oor mekaar neergelê word deurdat een patroon op
’n plat vlak waargeneem word deur ’n tweede patroon op ’n parallelle, gedeeltelik
deursigtige vlak, met die geometrie van beide patrone en vlakke bekend. So ’n
voorwerp kan geskep word deur ’n spesiaal gedrukte glas vlak te monteer oor
gedrukte papier of oor ’n hoë resolusie skerm, soos ’n OLED skermof LCD.
Onswys hoe die kamera se koördinaat langs die as loodreg op die vlakke direk
uit frekwensie analise van die moiré patroon relatief tot ’n stel gidspunte in een
van die vlakke bepaal kan word. Hierdie metode vereis geen vooraf kennis oor
die kamera nie. Ons wys verder hoe die keuse van patrone, binne perke, arbitrêre
akkuuraatheid in die bepaling van hierdie koördinaat kan verkry ten koste van ’n
nouer bruikbare verstek in hierdie koördinaat. Die verbeterde akkuuraatheid is
geïllustreer in simulasie.
Indien ’n benadering van die kamera se volle stel 3D koördinate met voldoende
akkuuraatheid ook beskikbaar is, wys ons ook hoe fase analise van die
moiré patroon relatief tot die gidspunte ons in staat stel om’n nuwe benadering
te kanmaak vir die koördinate in die twee asse parallel aan die vlakke. Daar word
in simulasie getoon hoe hierdie nuwe benadering beduidend beter akkuuraatheid
kan bied in vergelyking met konvensionele metodes van benadering.
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Vertically-Integrated CMOS Technology for Third-Generation Image SensorsSkorka, Orit Unknown Date
No description available.
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Benefits and barriers of construction project monitoring using hi-resolution automated camerasBohn, Jeffrey S. 13 April 2009 (has links)
A more rapid and widespread use and implementation of technology in construction often fails since its benefits and limitations remain somewhat unclear. Project control is one of the most variable and time consuming task of construction project managers and superintendents, and yet continues to be mostly a manual task. Controlling tasks such as tracking and updating project schedules can be assisted through remotely operating technology such as hi-resolution cameras that can provide construction management and other users with imaging feeds of job site activities. Although construction cameras have been around for many years the costs, benefits, and barriers of their use have not been investigated nor quantified in detail. Subsequently, definitions and understanding vary widely, making it difficult for decision makers at the organizational level to decide on the investment in camera technology. This thesis reviews the status of hi-resolution cameras and their present use in construction. Results of a multi-phased survey to industry professionals were collected in order to identify benefits and barriers and develop a cost-benefit model that can be used for implementation technology in construction.
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Colour cameras in standard CMOS / Andrew J. Blanksby.Blanksby, Andrew J. (Andrew John), 1972- January 1998 (has links)
Bibliography: p. 273-286. / xvi, 288 p. : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1999
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Colour cameras in standard CMOS /Blanksby, Andrew J. January 1998 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1999. / Includes bibliographical references (p. 273-286).
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Stereoscopic 3D viewing systems using a single sensor cameraPrakash, Deepak, January 2008 (has links)
Thesis (M.S.)--Ohio State University, 2008. / Title from first page of PDF file. Includes bibliographical references (p. 54-56).
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Integrating depth and intensity information for vision-based head trackingKatta, Pradeep. January 2008 (has links)
Thesis (M.S.)--University of Nevada, Reno, 2008. / "August, 2008." Includes bibliographical references (leaves 47-51). Online version available on the World Wide Web.
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A color filter array interpolation method for digital cameras using alias cancellationAppia, Vikram V. January 2008 (has links)
Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Russell Mersereau; Committee Member: Anthony J. Yezzi; Committee Member: Yucel Altunbasak.
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Thermal image analysis using calibrated video imagingLi, Dong, January 2006 (has links)
Thesis (Ph.D.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 23, 2009) Includes bibliographical references.
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