Masters Theses

Title

Effect of threshold in a high resolution target movement monitor in underground mines

Abstract

"The high resolution target movement monitor (HRTMM) was developed at the Missouri University of Science and Technology to detect and measure wall movements in underground mines to help reduce fatality and injury rates. The system detects the movement of a target with submillimeter accuracy based on the images of one or more laser dots projects on the target and viewed by a high-resolution camera. The relative position of the centroid of the laser dot in the images corresponds to target movement. The centroid position is determined by customized software that uses ImageMagick. Prior versions of the HRTMM set the image threshold and window size based on a manual, visual examination of the images. This work systematically examines the effect of a varying threshold on the calculated centroid position. First, the software is modified to function in a batch of images without human intervention. The same software is developed using OpenCV to eliminate the need to input parameter window size and to improve the performance speed. The ImageMagick and OpenCV results are compared in the various experiments. Second, the thresholding effects on the centroid position are determined for various target positions. The centroid positions are plotted as a function of varying thresholds to identify a range of thresholds for which the centroid position does not change significantly for normal lighting conditions. This work also proposes methods to determine the threshold ranges for various combinations of HRTMM components"--Abstract, leaf iii.

Advisor(s)

Watkins, Steve Eugene, 1960-
Moss, Randy Hays, 1953-

Committee Member(s)

Apel, Derek

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2009

Pagination

viii, 61 leaves

Note about bibliography

Includes bibliographical references (pages 90-92).

Rights

© 2009 Deepti Bairineni, All rights reserved.

Document Type

Thesis - Citation

File Type

text

Language

English

Library of Congress Subject Headings

Ground control (Mining) -- Instruments
Lasers -- Measurement
Mine safety -- Equipment and supplies

Thesis Number

T 9478

Print OCLC #

436171077

Link to Catalog Record

Full-text not available: Request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b7077082~S5

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