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0 Replies and 4140 Views
Band Math 4140 0
Started by Deleted User
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
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4140 |
15 Jan 2017 08:55 AM |
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1 Replies and 2892 Views
Band Math 2892 1
Started by Deleted User
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 ))
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1 |
2892 |
05 Dec 2016 04:18 AM |
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3 Replies and 2777 Views
error in flaash of EO-1 Hyperision image 2777 3
Started by Deleted User
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...
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3 |
2777 |
20 Oct 2016 05:46 AM |
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2 Replies and 2770 Views
PCA 2770 2
Started by Deleted User
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 ...
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2 |
2770 |
10 Oct 2016 06:23 AM |
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1 Replies and 2765 Views
MTMF Result display 2765 1
Started by Deleted User
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 !
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1 |
2765 |
14 Aug 2016 09:35 AM |
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6 Replies and 2592 Views
SAM classification using ASCII file 2592 6
Started by Deleted User
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...
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6 |
2592 |
02 May 2016 12:44 PM |
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1 |
2945 |
22 Jan 2016 02:43 PM |
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0 Replies and 3631 Views
login 3631 0
Started by Deleted User
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
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3631 |
06 Oct 2015 04:05 AM |
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0 Replies and 2878 Views
CAnt download IDL 2878 0
Started by Deleted User
When i go under downloads > all downloads in my account it is all empty and i cant download IDL or anything else. Whats wrong
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0 |
2878 |
04 Oct 2015 09:33 AM |
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1 Replies and 2223 Views
Syntax error with FUNCTARGS 2223 1
Started by Deleted User
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...
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1 |
2223 |
23 Jul 2015 02:30 PM |
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1 Replies and 2532 Views
IDL 7.1 operating system support 2532 1
Started by Deleted User
Can my older operating systems be updated to newer operating systems and support running IDL 7.1
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1 |
2532 |
22 Jul 2015 11:51 AM |
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1 |
2302 |
13 Apr 2015 11:44 AM |
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2 Replies and 2476 Views
Digitalglobe data for research 2476 2
Started by Deleted User
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
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2 |
2476 |
10 Apr 2015 05:58 PM |
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1 Replies and 2285 Views
support vector machines 2285 1
Started by Deleted User
Can we use support vector machines to analyze ground-level spectra as opposed to imagery
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1 |
2285 |
30 Mar 2015 01:10 PM |
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1 Replies and 2423 Views
ENVI_QUAC_DOIT 2423 1
Started by Deleted User
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...
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1 |
2423 |
17 Mar 2015 01:13 AM |
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1 Replies and 2175 Views
Uninstalling IDL 2175 1
Started by Deleted User
Would you please tell me how I can *completely* uninstall IDL 8.1
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1 |
2175 |
06 Mar 2015 12:23 PM |
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1 Replies and 2284 Views
IDL7.0 compatibility 2284 1
Started by Deleted User
Hi Kate,
Is IDL 7.0 compatible with Windows 7 because next to the download links there is only Vista and XP.
Thank you
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1 |
2284 |
21 Jan 2015 11:15 AM |
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1 |
2442 |
16 Jan 2015 01:51 PM |
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2 Replies and 2117 Views
Code Library gone forever? 2117 2
Started by Deleted User
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
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2 |
2117 |
09 Jul 2014 11:40 AM |
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1 Replies and 2427 Views
Recorded webinar 2427 1
Started by Deleted User
Hi,
Why all webinars are not avalible
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1 |
2427 |
18 Feb 2014 02:24 AM |