Using FracLac to assess general site heterogeneity

[Kara M]

Hello All,

I'm interested in comparing images of grassland sites (taken on foot, rather than by satellite) in terms of how variable they are. FracLac's metric of lacunarity seems perfect to the task, however, if I want to just use a single metric to compare a suite of 60 images I'm unsure how to proceed.

From the manual and the work that I have done so far, it seems like the best way to characterize heterogeneity in a general sense is to compare the slope of ln lacunarity plotted against ln box size. Is this correct? How can I get these slopes in the software? The only place that I see slope on the output is on some of the myriad graphs. I'm not sure what these all are, and the slopes are variable.

Am I on the right track here? Do folks have a suggestion for what metric to use and where to get it? Other software or methods would be fine too.

Thanks so much!

Kara Moore
Post doctoral researcher
Dept of Evolution and Ecology
University of California, Davis

[audrey karperien-2]

Hi.  If you could send me some sample images (send them to [hidden email]), I will take a look at them and tell you more about what to use.
Regards,
Audrey Karperien






________________________________
From: Kara M <[hidden email]>
To: [hidden email]
Sent: Thu, March 4, 2010 5:02:12 PM
Subject: Using FracLac to assess general site heterogeneity

Hello All,

I'm interested in comparing images of grassland sites (taken on foot, rather
than by satellite) in terms of how variable they are. FracLac's metric of
lacunarity seems perfect to the task, however, if I want to just use a
single metric to compare a suite of 60 images I'm unsure how to proceed.

From the manual and the work that I have done so far, it seems like the best
way to characterize heterogeneity in a general sense is to compare the slope
of ln lacunarity plotted against ln box size. Is this correct? How can I get
these slopes in the software? The only place that I see slope on the output
is on some of the myriad graphs. I'm not sure what these all are, and the
slopes are variable.

Am I on the right track here? Do folks have a suggestion for what metric to
use and where to get it? Other software or methods would be fine too.

Thanks so much!

Kara Moore
Post doctoral researcher
Dept of Evolution and Ecology
University of California, Davis
--
View this message in context: http://n2.nabble.com/Using-FracLac-to-assess-general-site-heterogeneity-tp4678196p4678196.html
Sent from the ImageJ mailing list archive at Nabble.com.