Re: Fractal dimension by ImageJ

[Nirendra Mustafi]

Hi there!

Can anybody tell me how to determine the fractal dimension by using
ImageJ? I am looking at the diesel particulates by using scanning
electron microscopy and transmission electron microscopy. These
microscopies produce images that can be processed and analyzed by
ImageJ. However, I couldn't find options to determine the fractal
dimension from these images which are generally particle agglomerates
(composed of nano to micro size particles bonded together).

Regards and looking forward for the reply
--
##########################################
Nirendra Nath Mustafi
Thermodynamics Lab.
Mechanical Engineering Department
The University of Auckland
Private Bag 92019
Auckland, New Zealand
Ph.: [phone] Ext 87007 (Work)
        [phone] (Home)
Fax: [phone]
E-Mail: [hidden email]

[audrey karperien-2]

----- Original Message ----
From: N
The FracLac plugin will help.


----- Original Message ----
From: Nirendra Mustafi <[hidden email]>
To: [hidden email]
Sent: Tuesday, November 7, 2006 3:35:47 PM
Subject: Re: Fractal dimension by ImageJ


Hi there!

Can anybody tell me how to determine the fractal dimension by using
ImageJ? I am looking at the diesel particulates by using scanning
electron microscopy and transmission electron microscopy. These
microscopies produce images that can be processed and analyzed by
ImageJ. However, I couldn't find options to determine the fractal
dimension from these images which are generally particle agglomerates
(composed of nano to micro size particles bonded together).

Regards and looking forward for the reply
--
##########################################
Nirendra Nath Mustafi
Thermodynamics Lab.
Mechanical Engineering Department
The University of Auckland
Private Bag 92019
Auckland, New Zealand
Ph.:    [phone] Ext 87007    (Work)
    [phone]        (Home)
Fax:    [phone]
E-Mail: [hidden email]

[Gabriel Landini]

On Tuesday 07 November 2006 22:35, Nirendra Mustafi wrote:
> Hi there!
>
> Can anybody tell me how to determine the fractal dimension by using
> ImageJ?

Go to Analyze>Tools>Fractal Box Count...

http://imagejdocu.tudor.lu/imagej-documentation-wiki/gui-commands/tools

> I am looking at the diesel particulates by using scanning
> electron microscopy and transmission electron microscopy. These
> microscopies produce images that can be processed and analyzed by
> ImageJ.

Be aware that what you get in the SEM pictures is the "projected outline"
while in TEM it is the "sectioned outline". These are very different things.  

In strict sense, the TEM sections are a better way to analyse the particle
irregularity because the section through the object corresponds to
its "zeroset" (you reduce the dimensions by 1). In general, you then can
extrapolate the dimension of the section +1 (i.e. D+1) as the dimension of
the particle in 3D. Not so with the projected outline.
I hope it helps

Gabriel