[GRASSLIST:2213] Re: How to display satellite data correctly?

[Thomas Adams]

Kris,

I would like to have your script; thanks.

Tom



Wolfgang von Hansen wrote:

>Kris Nackaerts <knackaerts at gmx.net> schrieb am 13.01.04 22:09:11:
>  
>
>>I had the same problem when trying to visualize hyperspectral images. I 
>>created a script in R (www.r-project.org) to analyze the histogram 
>>output files and create a GRASS script automatically to correctly 
>>rescale the values for visualisation. I could then say like remove the 
>>5% tails.
>>    
>>
>
>I just wrote a small shell script myself which basically uses r.stats, awk and r.colors. Now everything is looking fine!
>
>  
>
>>If you are interested in this script, let me know. Otherwise, I also 
>>used just a PCA transform to get a first impression of what was in the 
>>images.
>>    
>>
>
>For the visualization of multispectral data it normally is sufficient to choose some interesting bands by their wavelength, but I agree with you that PCA is a good preprocessing step for visual inspection of a large number of bands.
>
>
>Wolfgang
>______________________________________________________________________________
>Erdbeben im Iran: Zehntausende Kinder brauchen Hilfe. UNICEF hilft den
>Kindern - helfen Sie mit! https://www.unicef.de/spe/spe_03.php
>
>  
>

-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

EMAIL:	thomas.adams at noaa.gov

VOICE:	937-383-0528
FAX:	937-383-0033

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20040114/64294afa/attachment.html