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By jeanmichel.theriault - Posted on 23 février 2012

Introduction to Image analysis

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Image analysis is concerned with the extraction of quantitative information from images captured in a digital form.

 

All image analysis procedure involve 4 major steps that are briefly outlined in the following pages. They are:

 

 

More information can be found in the book I have edited Image Analysis, Sediments and Paleoenvironments.


 

Acquiring images at the microscope

 

Petrographic microscope

Coming soon...


Scanning electron microscope


 



 

Processing images

 

 


Download movie (3M)

 

 

 



 

Image measurements

 


The following measurements are made on each particle within the field of view

  • Gravity center (g)
  • Surface area (A)
  • L major
  • l minor
  • Angle (α)

 

 

Results are saved in a spreadsheet for further processing
 

 

Examples of measurements indices

 

Equivalent disk diameter
Elongation

Horizontality

 

 

Example: Turbidite from Sawtooth Lake, Arctic, Canada

 

Original SEM view
 

 


Processed image
 


 

Synthesis of possible measurements