1. No category

Image Analysis in
Geosciences
Renée Heilbronner
where?
University of Minnesota
when?
April, 27 - May, 1, 2015
TWIN CITIES WORKSHOP
TEXT BOOK
This short course is designed to familiarize the
participants with methods of image processing and to
provide sufficient background to be able carry out a
number of different microstructural analyses.
Heilbronner, R. and Barrett, S.D.:
‘Image Analysis in Earth Sciences’,
Springer Verlag, Heidelberg, 2013.
ISBN 978-3-642-10342-1
Two basic types of image analysis are introduced:
- direct analysis of images without segmentation,
- analysis of segmented images (bitmaps), best fit
objects or outlines.
SOFTWARE
Depending on the audience, additional special
techniques may be introduced at any point in the
course.
Image SXM (Mac) and/or ImageJ / Fiji (Mac and PC)
Spreadsheet Program
Plot Software
WEB INFO
http://earth.unibas.ch/micro/
SCHEDULE
monday
tuesday
wednesday
thursday
friday
volumes
segmentation
grain size
shape & strain
FFT & ACF
9:00
session 1 1st day start at 10:00
introduction
overview
course organization
image model
point operations POP
segmentation by POP
10:30
11:00 digital images
session 2 Image SXM intro
look-up tables
(Lazy LUTs)
scale - calibrate
re-size
LAB SESSION
make stack: phase map grain map - gb map
segmentation &
structural filtering
(Lazy erode dilate)
17:00
spatial frequency
Fourier transforms
FFT
frequency filtering
2D to 3D
Kaleidagraph:
prepare histograms
stripstar
examples
particle shape, axes
particle orientation
(paror)
bulk fabric
Kaleidgraph:
plot results
autocorrelation function
(ACF)
(Lazy ACF)
surface orientation
(surfor)
bulk fabric - strain
individual shapes of
particles (ishapes)
various shape factors
open session
special topics
projects
LAB SESSION:
surfor and paror analyses
discussion
final wrap-up
course evaluation
lunch break
neighbourhood operations fractal GSDs
NOP
GSD mapping
averaging filters
(Lazy D-map)
gradient filters
segmentation by NOP
(Lazy grain boundaries)
15:00
15.30 volume estimation
session 4 (Lazy LUTs)
stereology basics
raster to outline
(Lazy digitize)
digitizing artefacts
(scasmo)
break
12:30
13:30 pre-process: noise filter
session 3 background corrections
(Lazy lighting)
segmentation by LUT
copy - image math
contiguous phase stack
grain size
3D to 2D
size distributions GSD
grain size mapping
(Lazy grain size map)
break
Image SXM:
Analyze menu
Kaleidagraph:
plot data
LAB SESSION
grain size analysis
end of day