remote sensing tips?- urban areas - buildings

[mathieu.rajerison]

Hello,


I'm just beginning with ImageJ. I find it simple but very powerful. I think
I'll have much pleasure to learn it.


I have a high resolution satellite image: 0.5m

I've found articles on the web, mentionning ImageJ for teledetection
purposes: extraction of houses, etc...given the texture, the shape, the
presence of shadows

But I haven't found any method, or technical guide to accomplish that.


Would you have any link to give me, or idea, or method with ImageJ?

[Nathaniel Ryckman]

I found a nice paper explaining some methods using imageJ:

http://www.corp.at/archive/CORP2005_SOBREIRA_FILHO.pdf


They used a plugin for imageJ called FracLac:

http://rsbweb.nih.gov/ij/plugins/frac-lac.html

Here's the Google search I did to find the information. There seems to be other promising links that you can investigate:

http://www.google.com/search?hl=en&safe=off&q=imagej+urban+fractal+analysis&aq=f&aqi=&aql=&oq=

If you are not a programmer and do not find a plugin that will help you perform your image analysis (http://rsbweb.nih.gov/ij/plugins/index.html), I recommend that you either hire a programmer, buy software specifically made for analyzing satellite images, or really delve into these tutorials:

MACROS (simple programs that are useful when you want to repetitively/sequentially use menu commands)
http://rsb.info.nih.gov/ij/developer/macro/macros.html
http://rsb.info.nih.gov/ij/developer/macro/functions.html

PLUGINS (complicated programs that are useful for complex programs)
http://www.imagingbook.com/index.php?id=102
http://rsbweb.nih.gov/ij/developer/api/

Learning the Macro language would be a good start for someone who doesn't have a programming background, but you will probably need to make a Plugin for the work that you are describing.

[mathieu.rajerison]

Thanks a lot for the links.
I'll look after them. It will give me some ideas!

cheers,

mathieu