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Browsing by Subject "Photogrammetry"

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Image stitching for usage in photogrammetric algorithms

Author: Stoltz, George G Date: Jan 2019 A distributed camera system can consist of multiple camera groups. An image stitch is created by each group and transmitted to a central processing unit. The central processing combines all received images into an image stitch. The camera ... Read more
Improved real-time photogrammetric stitching

Author: De Villiers, J ; Cronje, J Date: Apr 2013 This work extends earlier work on the real-time photogrammetric stitching of staring arrays of high resolution videos on commercial off the shelf hardware. The blending is both further optimised for Graphics Processor Unit (GPU) implementation ... Read more
An investigation into robust spectral indices for leaf chlorophyll estimation

Author: Main, Russell S ; Cho, Moses A ; Mathieu, Renaud SA ; O'Kennedy, Maretha M ; Ramoelo, Abel ; Koch, S Date: Nov 2011 Quantifying photosynthetic activity at the regional scale can provide important information to resource managers, planners and global ecosystem modelling efforts. With increasing availability of both hyperspectral and narrow band multispectral ... Read more
Medium resolution image fusion, does it enhance forest structure assessment

Author: Roberts, JW ; Van Aardt, J ; Ahmed, FB Date: Jul 2008 This research explored the potential benefits of fusing optical and Synthetic Aperture Radar (SAR) medium resolution satellite-borne sensor data for forest structural assessment. Image fusion was applied as a means of retaining disparate data ... Read more
A study on the effect of different image centres on stereo triangulation accuracy

Author: De Villiers, J ; Jermy, R ; Nicolls, F Date: Nov 2015 This paper evaluates the effect of mixing the distortion centre, principal point and arithmetic image centre on the distortion correction, focal length determination and resulting real-world stereo vision triangulation. A robotic arm is used ... Read more
A study on the sensitivity of photogrammetric camera calibration and stitching

Author: De Villiers, J ; Nicolls, F Date: Nov 2014 This paper presents a detailed simulation study of an automated robotic photogrammetric camera calibration system. The system performance was tested for sensitivity with regard to noise in the robot movement, camera mounting and image processing ... Read more

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Browsing by Subject "Photogrammetry"

Browsing by Subject "Photogrammetry"

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