Application of Optical CT to Estimate the Mass of Macroalgae in a Tank of Water
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Authors
Yamanaka, Mao
Date
Type
thesis
Language
eng
Keyword
macroalgae , optical CT , mass estimation
Alternative Title
Abstract
This thesis develops and tests a mass estimation system for macroalgae using optical computed tomography. The system consists of a table with a fixed camera and backlighting, which rotates around a container of macroalgae to collect images from various points.
The images capture the translucency along various light paths through the container. From the translucency measurements, computed tomography techniques are used to reconstruct the optical density at points on the interior of the container. The mass of the macroalgae is determined as a function of the total optical density.
The system was evaluated in several tests which controlled optical densities using "mock algae" consisting of a number of paper strips within the container.
Experiments found a linear relationship between the total optical density and the number of mock algae strips. However, the relationship was inconsistent across experimental trials, and the reconstructed volumes were blurry and inaccurate. Despite several tests and analyses, these difficulties remain unexplained at this time.
While the system has some potential due to the strong linearity within sets, the inconsistencies and inaccuracies must be resolved before it can be considered a viable tool for estimating the mass of real algae in an acrylic hollow cylinder.
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Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
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Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.