Re: debris avalanche deposit

Posted by Balazadeh Mohtadi, Carlos on Dec 03, 2014; 4:56pm
URL: http://imagej.273.s1.nabble.com/debris-avalanche-deposit-tp5010744p5010746.html

hi Audrey,

You should be able to do roundness analysis using the Analyze particle
function in ImageJ.
I just tested this real quick with this guide and gave me a suitable output
of what I think you are looking for: http://mesa.ac.nz/?page_id=3813

I hope this helps,

Best regards,

Keyvan B.

On Wed, Dec 3, 2014 at 11:51 AM, Audray Delcamp <[hidden email]> wrote:

> Dear All,
>
> I have been trying to use Image J for some times to analyse field data. I
> am working on debris avalanche deposits, and I would like to have a good
> estimation on roundness/angularity and to do some grain size distribution.
> However, it seems that the nature of the deposit is not suitable for image
> J because of heterogeneities.
> I attached on thin section picture as example. I have been trying to change
> color, contrast, thereshold etc, (both in photoshop and imageJ) but nothing
> seems to give good result. Could you please let me know if such images are
> indeed suitable or not?
> I started to draw the contour of each clast by hand but it is time
> consuming and definitely not objective.
>
> Thanks for your help and advices!
> audray
>
> --
> Audr*a*y Delcamp
> Post Doc Researcher
> Department of Geography
> Faculty of Sciences
> Vrije Universiteit Brussel
> Building F - Room 8F14
> Pleinlaan 2
> B-1050 Brussel
> Belgium
> Phone: [phone]
> Blog: http://smilingchildren.over-blog.com/
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html