| 19 Feb 2015 11:34 AM |
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Good afternoon,
I know ENVI has a built in tool for vegetation suppression but I'm wondering if there is a way to do a customized suppression of a different index. The index is similar to NDVI but uses different bands but the math is slightly different or I would just substitute in the bands I need into the vegetation suppression tool.
Any ideas?
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Deleted User
New Member
Posts:59  
| 20 Feb 2015 08:35 AM |
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Hi,
You can use the ENVI Band Math tool to create your custom suppression index. Depending on your equation, it could be something like:
float((b1-b2)/(b1+b2))
The Band Math tool will let you assign specific bands to each term of your equation.
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Deleted User
New Member
Posts:
| 25 Feb 2015 12:14 PM |
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this tool seems similar to the raster calculator in ArcMAP. Are you sure this would output a suppression and not just a raster of the input formula?
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Deleted User
Basic Member
Posts:228 
| 26 Feb 2015 11:43 AM |
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Yes, you are right. It absolutely would output a raster result from the input formula. So you would need to make sure that you enter an expression that represents the type of suppression you would like to apply. It sounded like you had some algorithms in mind. If not, then you may want to look in the literature for algorithms for the type of suppression you need. Then you can use ENVI's Band Math tool to apply them to your imagery.
- Peg
Exelis VIS
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