Award Date

8-2010

Degree Type

Thesis

Degree Name

Master of Science in Electrical Engineering (MSEE)

Department

Electrical and Computer Engineering

First Committee Member

Emma E Regentova, Chair

Second Committee Member

Peter A Stubberud

Third Committee Member

Henry Selvaraj

Fourth Committee Member

Ajoy K Datta

Fifth Committee Member

Markus Berli

Number of Pages

56

Abstract

The rhizosphere, i.e. the zone of soil immediately surrounding plant roots plays a prominent role in supplying plants with water and nutrients. However, surprisingly little is known about rhizosphere physical properties and how they affect root growth, water and nutrient uptake. The lack of non-invasive and non-destructive imaging techniques necessary to observe living roots growing in undisturbed soil have been a main reason for this shortcoming. Recent advances in synchrotron X-ray micro tomography (CMT) provide the potential to directly observe soil physical properties around living roots in-situ.In this work we develop procedures for assisting scientist to study the soil properties by visualizing and automatically processing micro CT images. Specifically image de-noising in the wavelet domain is performed for convenient profiling and segmentation is applied for automated calculation of soil properties. As new measures we proposed the normalized radial and circular aggregation and water transportability and also have shown ways of generalizing the studies for 3D.

Keywords

Denoising; Plant-soil relationships; Rhizosphere; Segmentation; Soils; Thresholding; Water transportability; Wavelet shrinkage; X-ray micro tomography

Disciplines

Computer Engineering | Electrical and Electronics | Environmental Engineering

Language

English

Comments

Attached Files: Appendix A, Appendix B


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