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1 Replies and 1116 Views
Run SVM 1116 1
Started by Deleted User
I tried the SVM method but it was runing very slowly. After run 4 images I had to close ENVI and opened new one otherwhise it was too slowly. Does SVM take a lot of memory How can I run it more faster
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1 |
1116 |
11 May 2009 06:29 AM |
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1 Replies and 1810 Views
Emissivity Normalization Method 1810 1
Started by Deleted User
hi,
I'm procesing ASTER images L1b on Envi to calculate temperature, but I had problems with that. I think I did a mistake with the wavelength scale factor and scale factor data. Do you know a way to get it wright I haven&180;t being lucky yet.
&160;
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1 |
1810 |
08 May 2009 01:11 PM |
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0 Replies and 996 Views
Using EndMembers to apply Supervised Classification using IDL 996 0
Started by Deleted User
Hi,
I have an endmember collection I have saved to ascii text file, and want to use that to classify a large number of images by using an IDL script. I am wondering whether someone could provide example code for this please
Looking in the ENVI reference material, it appears that the use of endmembers involves using the Endmember Collection Widget, but in my case I don't want to have user intervention - just to read in the endmembers from file and run the Maximum Likelihood classificat...
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0 |
996 |
07 May 2009 05:48 PM |
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0 Replies and 1314 Views
Correct Hyperion smile effect 1314 0
Started by Deleted User
Normal
0
21
false
false
false
MicrosoftInternetExplorer4
Hi everyone! I want to correct the smile effect of Hyperion images with ENVI . The choice of wavelength recalibration in FLAASH doesn't work with corrected images with less bands than 242.
Do you know any other way to achieve it
Thanks a lot!!!
&160;
&160;
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0 |
1314 |
07 May 2009 04:39 AM |
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0 Replies and 1233 Views
EMITTANCE_CALC_DOIT 1233 0
Started by Deleted User
how to use the&160; function of EMITTANCE_CALC_DOIT by ENVI Can you give me&160;a example
My Email : xianghaibing913163.com
Thanks!
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0 |
1233 |
07 May 2009 12:59 AM |
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1 Replies and 1218 Views
ENVI-IDL-composition of processes 1218 1
Started by Deleted User
Normal
0
MicrosoftInternetExplorer4
Hi all,
I cannot find information about how compose ENVI processes in a wizard process.
For example I’ve a lot of ASTER Image to Ortorectify, correct for Athmospher effect using FLAASH and other ENVI process.
Can I build a wizard that calls ENVI procedures automatically one after one.
Where I can found this Information
Thank you
Luca
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1 |
1218 |
06 May 2009 10:30 AM |
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2 Replies and 1158 Views
Problem with Spectral Analyst 1158 2
Started by Deleted User
Hi everyone,
&160;
I am using Spectral Hourglass Wizard to recognize the material in my AVIRIS reflectance image. The output of the Spectral Hourglass Wizard is reasonable. But if I tried to use Spectral Analyst to match my endmembers (got from Spectral Hourglass Wizard) with spectral library, the endmember will be matched to all the materials in spectral library with the same match score. I am quite confused about this. Hope someone can help me find what is wrong with it. Thanks in advance.
...
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2 |
1158 |
05 May 2009 10:09 AM |
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0 Replies and 1269 Views
Importing ROIs from another remote sensing package into ENVI 1269 0
Started by Deleted User
Hi There:&160; I have been using PCI Geomatica to do a supervised classification of a Landsat 5 scene and I would like to compare the results of the classification with what ENVI would output.&160; However, I have to somehow export my training areas (or ROIs) from PCI Geomatics into ENVI.&160; Does anyone know what format I need to export my ROI from PCI so that I can import them into ENVI (I don't want to redraw all the ROI sfor ENVI, I just want to import them).&160; So, in a nutshell, wha...
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0 |
1269 |
04 May 2009 06:13 PM |
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2 Replies and 1313 Views
FLAASH Error report 1313 2
Started by Deleted User
I am trying to atmospherically correct a hyperion image using FLAASH but I keep getting an error message and cannot finish the correction. Do you know what am I doing wrong Do you need more information in order to help
Thanks a lot
ERROR MESSAGE
ACC error:modrd5: Nonfinite numbers in coefficient array coed.
IDL error: CDRIVER4V3R2
ACC_MODRD5, ACC_KTAEROSOL, ACC_HYPER2, ACC_ACC, ENVI_ACC_EVENT, ENVI_FLAASH_PROCESS_MANAGER, IDLRTMAIN, $MAIN$
Kind regards,
&160;
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2 |
1313 |
04 May 2009 02:02 AM |
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2 Replies and 1436 Views
Lidar Toolkit / ENVI_LAS.sav 1436 2
Started by Deleted User
Hi All,
I downloaded this file looking for the lidar toolkit and it doesn't seem to want to run either with the IDL virtual machine, from the IDL workbench, or using idlrt -novm ENVI_LAS.sav.&160; it also doesn't correspond to the files in the Lidar toolkit tutorial video.&160; Does anyone know how to get the lidar toolkit to work Thanks!
Gordon
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2 |
1436 |
30 Apr 2009 09:34 PM |
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1 Replies and 1538 Views
run envi in demo mode on ubuntu 1538 1
Started by Deleted User
Hello all,
I installed ENVI4.5 on Ubuntu 7.10
Now, I would like to run Envi in demo mode, but it does not work.
It is always asking for a license.
Thank you for your help,
Salwa
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1 |
1538 |
29 Apr 2009 05:04 AM |
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1 Replies and 1405 Views
Ignoring Zeros 1405 1
Started by Deleted User
I am new at classifying in ENVI and I cannot seem to figure out how to ignore zeros when running the maximum likelihood classifier.&160; I am sure there is an easy way to do this, but I cannot figure this one out.&160; Basically, when I classify my data, all is well except the external collar is classified as a particular land type.&160; Thanks for the help.
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1 |
1405 |
28 Apr 2009 01:33 PM |
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5 Replies and 2603 Views
Extract pixel values from image stacks 2603 5
Started by Deleted User
Hi all,
I have image stacks with several layers and an evf file with 3 points in it. How can I extract the pixel values of all bands at the location of the points
Thanks for your help!
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5 |
2603 |
28 Apr 2009 10:35 AM |
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1 Replies and 1419 Views
Dealing with georeferenced datas 1419 1
Started by Deleted User
Hello,
The context: I am having some level 1.5 georeferenced PALSAR dataset.
What I want to do is to export those datas to IDL (I can do it now) and I want to have access to the layer that contains the lat/lon coordinates. In fact, I want to be able to extract the backscatter of one pixel located with its lat/lon coordinates and compare it to my ground dataset.
Because in ENVI I have the values displayed with their coordinates in the cursor value box and I wonder how to have an access to thos...
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1 |
1419 |
27 Apr 2009 03:20 PM |
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1 Replies and 1566 Views
MNF Error 1566 1
Started by Deleted User
I cannot run MNF on my hyperion image.&160; Every time I try to run this, I get an error saying that the number of pixels in the shift difference spatial subset should be greater than the number of input bands.&160; My spatial subset is the entire image, so maybe I am doing something wrong or don't fully understand how to use MNF.&160; Does anybody have any suggestions for me
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1 |
1566 |
27 Apr 2009 02:31 PM |
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2 Replies and 1627 Views
ENVI 4.6.1 and Windows 7 1627 2
Started by Deleted User
I just installed ENVI 4.6.1 on a Windows 7 machine (and rebooted at least twice).&160; Both the operating system and ENVI are the 64-bit versions.&160; Both ENVI (with or without IDL) and ENVI Zoom crash when I try to load them, but IDL loads just fine.&160; Does anyone have a fix for this
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2 |
1627 |
27 Apr 2009 01:27 PM |
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1 Replies and 1507 Views
ENVI data tranform in ArcMAP lost legend 1507 1
Started by Deleted User
Hey,there, I have a problem that envi raster data lost legend when I&160; transformed the classified raster map to arcmap, could anybody help me cope with the problem
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1 |
1507 |
25 Apr 2009 12:35 PM |
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2 Replies and 1327 Views
Calling envi routines without opening the environment 1327 2
Started by Deleted User
Hello all,
I would like to use ENVI/IDL to work as a server for image analysis. We already have quite a large code in ENVI/IDL, and it would be difficult to maitain a parallel code in fortan or whatever.
Our server is windows based,so as it is not possible to open the GUI from a CGI, and as the command line version of IDL is only available on linux, I am willing to switch to this OS. But, the fact is that I have been reading the Envi Help, and I don't find a way for IDL to load the Envi librar...
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2 |
1327 |
24 Apr 2009 01:19 PM |
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0 Replies and 1219 Views
slant to grounda range PALSAR 1219 0
Started by Deleted User
Hello all,
I have PALSAR images, level 4.1 product with slant range projection. I converted from slant to ground range projection in ENVI using information from published document.
The steps in ENVI are:
a. Radar---> slant to range ----> generic ( I did not find PALSAR in ENVI 4.5 and 4.6)
b. I put instrument height : 695.65 km ( I got it from published document)
c. Near range distance from publsihed document is 31.6 degree, however, this is for FBS (single&160; not dual polarization) and ...
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0 |
1219 |
24 Apr 2009 06:28 AM |
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1 Replies and 1122 Views
Visualizing ROI separability 1122 1
Started by Deleted User
Hello. How can I visualize the separability of my ROIs I've run the Computer ROI Separability tool from the ROI Tool window and got a value of 2.0 for almost all combinations, but I want to actually visualize the separation of the ROIs as histograms so I can see the range, means and especially the spectral distances between the ROIs. And I'd like to do this for all 3 bands separately (ASTER green, red and NIR). I did try the n-D Visualizer but did not find that to be effective, probably because...
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1 |
1122 |
23 Apr 2009 04:50 PM |