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0 Replies and 3484 Views Band Math  3484  0 Started by  nadia akdim Hi, I would like to specify the Conditional Statements using Band math of Envi for this equation (Ln(1-(B1/b))) to avoid the NAN values. When B1 is equal to b then I got NAN values (ln (0)), because the real natural logarithm function ln(x) is defined only for x>0. Thanks
0 3484
15 Jan 2017 08:55 AM
1 Replies and 2345 Views Band Math  2345  1 Started by  Bisma Qazi How can i write this expression in ENVI band math r=(∑_i¦(x_i-x_m ) (y_i-y_m))/(√(∑_i¦(x_i-x_m ) ^2 ) √(∑_i¦(y_i-y_m ) ^2 ))
1 2345
05 Dec 2016 04:18 AM
3 Replies and 2327 Views error in flaash of EO-1 Hyperision image  2327  3 Started by  rajchandar padmanaban I am a user of ENVI5.2, Now I have a problem in dealing with Flaash. we want to use Flaash for our EO-1 hyperison image, the image has 179 bands after the pre-procession. and the faash always enconter an error after the process bar went to 58 done, the error shows: ACC error: h2oinv: h2oinv IDL error MOMENT: X error must contain 2 OR more elements. if I do not choose water retrieval, there is also an error: tile0.img, the process did not finish correctly I DO NOT know where the problem is,and...
3 2327
20 Oct 2016 05:46 AM
2 Replies and 2262 Views PCA  2262  2 Started by  Bisma Qazi Firstly,I would like to ask that why am I unable to access my previous posts. Secondly, I performed PCA on an image in ENVI and also in ERDAS. There was a huge difference between Eigen values and Eigen vector matrix computed in the two platforms. Why is it so Also, do the rows of the eigen vector matrix represent different PCS or original bands in ENVI. Say, for example, if I got a matrix like this Eigenvector Band 1 Band 2 Band 3 Band 4 Band 1 0.587621 0.598896 0.543896 ...
2 2262
10 Oct 2016 06:23 AM
1 Replies and 2280 Views MTMF Result display  2280  1 Started by  Rakesh Kumar Mishra I have classified an HSI image using MTMF method. The outputs are MF Score and Infeasibility for each class. I am trying to display all classes together in one image with different color for each class (similar to the SAM result). I am sure there should be a way in ENVI to display MTMF result where we can see all classes together with different color in one image. Can anyone please let me know how to do this Thanks you !
1 2280
14 Aug 2016 09:35 AM
6 Replies and 2113 Views SAM classification using ASCII file  2113  6 Started by  Samira Safaee We are trying to create a comprehensive spectral libraries for both 'soil' and 'salt' based on 8 study areas and use those spectral libraries in Spectral Angle Mapper algorithm in order to map the salt pans existed in the entire world. To do so we need to use ASCII files which contain only band values of each individual pixel in each band without location information. I have read that the right format for importing spectral information is the one that has 2 columns of number of bands and mea...
6 2113
02 May 2016 12:44 PM
1 Replies and 2390 Views How do I change my password?  2390  1 Started by  Lisa Upton How do I change my password
1 2390
22 Jan 2016 02:43 PM
0 Replies and 2974 Views login  2974  0 Started by  Javier Corripio Exelis denies access because it is an unverified account (it used to work perfectly, as I have been using IDL for many years). To verify you need to follow a link that was never sent and the page does not give the option for requesting another verification link. Really poor, poor web security design. Anyone else having a similar problem
0 2974
06 Oct 2015 04:05 AM
0 Replies and 2440 Views CAnt download IDL  2440  0 Started by  Jošt Hobič When i go under downloads > all downloads in my account it is all empty and i cant download IDL or anything else. Whats wrong
0 2440
04 Oct 2015 09:33 AM
1 Replies and 1831 Views Syntax error with FUNCTARGS  1831  1 Started by  Mai Truong Hi, I'm new to IDL, and I'm trying to compile a .pro file in Exelis in my Mac OSX. I know that this code runs in other machines, but when I compile it, I get a syntax error message, which I don't know where to start looking to fix: Compiled module: FITCIRC_MPFIT_FUNC. FUNCTARGS={XPP:xpp&91sel&93,YPP:ypp&91sel&93,VLOS:vlos&91sel&93,AON:aon&91sel&93},$ ^ Syntax error. The part of the code with this problem is: for i=0,nn-1 do begin sel = Rind.(i...
1 1831
23 Jul 2015 02:30 PM
1 Replies and 2082 Views IDL 7.1 operating system support  2082  1 Started by  Kate Kear Can my older operating systems be updated to newer operating systems and support running IDL 7.1
1 2082
22 Jul 2015 11:51 AM
1 Replies and 1884 Views Are ENVI and IDL supported on Windows 8 with touchscreen?  1884  1 Started by  MariM I am considering purchasing a new system that runs Windows 8 and has a touch screen. Can I use ENVI and IDL on this system and will it work with a touch screen
1 1884
13 Apr 2015 11:44 AM
2 Replies and 2063 Views Digitalglobe data for research  2063  2 Started by  Mamadou Coulibaly I am looking for high resolution data of the city of Abidjan, Ivory Coast (cote d'Ivoire). The data is to be used for research purposed only and I have no grant money at all to pay for it. Any idea where I could find it it or is there a Digitalglobe support for research activity. Thanks
2 2063
10 Apr 2015 05:58 PM
1 Replies and 1848 Views support vector machines  1848  1 Started by  Itiya Aneece Can we use support vector machines to analyze ground-level spectra as opposed to imagery
1 1848
30 Mar 2015 01:10 PM
1 Replies and 1918 Views ENVI_QUAC_DOIT  1918  1 Started by  Muhammad Bilal Hi, I am using "ENVI_QUAC_DOIT" IDL Code obtained from ENVI help but it gave an error - Please help me to run this code. Regards, Bilal (Hong Kong PolyU) Error: Restored file: ENVI_SPC. Procedure was compiled while active: ENVI_QUAC. Returning. Compiled module: ENVI_QUAC. Can't continue from this point. Execution halted at: $MAIN$ QUAC_CODE: PRO ENVI_QUAC COMPILE_OPT idl2 ; print, 'Starting batch process.' print, systime() input_loca...
1 1918
17 Mar 2015 01:13 AM
1 Replies and 1747 Views Uninstalling IDL  1747  1 Started by  Kate Kear Would you please tell me how I can *completely* uninstall IDL 8.1
1 1747
06 Mar 2015 12:23 PM
1 Replies and 1915 Views IDL7.0 compatibility  1915  1 Started by  Chadi Hi Kate, Is IDL 7.0 compatible with Windows 7 because next to the download links there is only Vista and XP. Thank you
1 1915
21 Jan 2015 11:15 AM
1 Replies and 1947 Views Can IDL be downloaded on only one computer or several?  1947  1 Started by  Kate Kear Question: Can IDL be downloaded on only one computer or several
1 1947
16 Jan 2015 01:51 PM
2 Replies and 1726 Views Code Library gone forever?  1726  2 Started by  Mike Lackner Hello, Has the Code Library been shut down forever I don't have anything particular I need, but the Code Library was a great resource to get some ideas. I understand the reason it was taken down was beyond Exelis' control, but it's really to bad that the valuable collection of little add-ons is gone. I didn't think it was any harm to anyone being up there. Mike
2 1726
09 Jul 2014 11:40 AM
1 Replies and 2008 Views Recorded webinar  2008  1 Started by  Jevgenijs Filipovs Hi, Why all webinars are not avalible
1 2008
18 Feb 2014 02:24 AM
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