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5 Replies and 1596 Views
ROI help in 5.2 1596 5
Started by Deleted User
I have some limited knowledge regarding ENVI. I also used only ENVI classic before.
Using 5.2, I have several hyperspectral images. I opened them all in ENVI 5.2 (it's nice compared to classic where you have to open a new display for every single one).
Took me a while to figure, that when I use ROI, I must also select the image I want the ROI to display in.
Anyway, my question is, once I create a set of ROI from every image (some images might have 2 of them), how can I "combine" them ...
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1596 |
15 Nov 2014 05:35 PM |
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1 Replies and 1523 Views
ROI error 1523 1
Started by Deleted User
Hello,
I am an undergraduate at BYU-I. There is no one on campus that has any knowledge on ENVI. Here is my problem. I am trying to create ROIs to do spectral analysis. I created a vector layer. After using the Vector to ROI tool I get an error message while trying to look at the statistics option. The error message reads "Arrays must be greater then 0" Please help.
Thanks,
Mike
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1 |
1523 |
13 Nov 2014 05:38 PM |
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1 Replies and 1684 Views
Seamless Mosaic Problem 1684 1
Started by Deleted User
Dear Exelis,
I observe that ENVI improves itsels with every new update. However Seamless mosaic tool is degrading what ENVI provided with version 5.0.
Seamless mosaic does lack the following:
* No project File: the widget crashes for 100 x 30x30 km 7.5meters RGB RASAT images.
* No batch parameter change, I want change parameters for all files.
Georeferenced Mosaic worked 2000 RASAT images, even it took several days, it worked.
My Colleague has been working few weeks just t...
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1684 |
10 Nov 2014 02:33 AM |
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1 Replies and 1733 Views
Data from ROI to an array (and then to a Text File) 1733 1
Started by Deleted User
I am trying to loop through a number of images (1-band) and over a set of ROIs. I would like to export the pixel values from each ROI to a file for use in another program. I can write the data out using ENVI:ExportROIS, but would like to get the data into an array to add a few things.
Here is a short code fragment.
rast1=e.OpenRaster(files&910&93)
rois = e.OpenRoi(roifile)
numrois = size(rois, /N_ELEMENTS)
WHILE(counter LT numrois) DO BEGIN
sROIfile = roidatfile String(c...
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1733 |
07 Nov 2014 02:34 PM |
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1 Replies and 1413 Views
HICO processing with Envi 5.1 1413 1
Started by Deleted User
Hi there,
I am trying to use FLAASH in Envi 5.1 to process HICO data. The band range for the HICO data I have is 400-896 nm. Since I am interested in the ocean, the 'Aerosol Retrieval' is set to '2-Band Over Water'. Then in the 'Hyperspectral Settings' option, I need to provide a file defining the channels. Any suggestions would be greatly appreciated.
Jun
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1 |
1413 |
06 Nov 2014 12:36 AM |
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1 Replies and 1892 Views
Need Help Can&39;t Install ENVI 5.2 1892 1
Started by Deleted User
Hi, i recently download ENVI 5.2 - Microsoft Windows (XP SP2, Vista, 7, 8) 32-bit Installer from Exelivis.com, the file size is about 1,3GB.
I've been trying to install the program but after reach 100 , this error message apear.
"Error 1935 - An Error Ocured during the installation of assembly component" .. then I click ok, and the installation wizard still dont disapear, and suddenly another error message says " Error :-1603 Fatal Error During Installation, Consult Windows I...
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1 |
1892 |
28 Oct 2014 04:28 AM |
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1 Replies and 1523 Views
Changing order of ROIs? 1523 1
Started by Deleted User
Aloha, is there a way to change the order of ROIs that are used as inputs for supervised classification algorithms (like parallelpiped, for example) I seem to recall doing this in earlier versions of ENVI but have not been able to figure it out in 5.1. Thank you.
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1523 |
24 Oct 2014 04:17 PM |
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4 Replies and 1447 Views
Adding Geometry from Non-Closed Polygons 1447 4
Started by Deleted User
Hello,
I am using the new ENVI API to import Shapefiles, create ROIs and then retrieve image pixel values. The Help documentation is here:
https://www.exelisvis.com/docs/enviroi__addgeometry.html
The documentation indicates that when using Polygons, they must be closed (i.e. the first and last vertices must be identical) and sure enough, when I execute the function which adds geometry (roi.AddGeometry in the Help), the function fails if the polygon is not closed.
Is there another method for wor...
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4 |
1447 |
24 Oct 2014 11:02 AM |
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1 Replies and 1347 Views
IAR and LogRES 1347 1
Started by Deleted User
Hello, I understand that IAR and LogRes uses information of all pixels in scene, but many time in full images you have a border with 0 values, will not be better to apply this correction considering a mask area, and not full scene
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1 |
1347 |
19 Oct 2014 02:10 PM |
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4 Replies and 1471 Views
Flaash - WV-2 pan 1471 4
Started by Deleted User
Dear,
How do I turn a WV-2 pan image for surface reflectance Whereas a single band can not be transformed to .bil or .bip and can not be input image in Flaash!
Thank You.
Camila
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4 |
1471 |
14 Oct 2014 01:05 PM |
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3 Replies and 1471 Views
Missing Vegetation Indices? 1471 3
Started by Deleted User
Hi
When I click to Vegetation Index Calculator, I only see 2 vegetation indices! (see http://imgur.com/zngjfUz ) As I can see from the help file there should be some like 27 indices. Does anyone know why I appreciate your help.
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3 |
1471 |
07 Oct 2014 02:36 PM |
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4 Replies and 1533 Views
ArcMAP to ENVI (georeferencing help) 1533 4
Started by Deleted User
Hi,
I am a new ENVI user and am looking for a little help. I am working on a project where I georeferened a ton of 1970's aerial photography in ArcMap and am currently in the process of mosaicing them together, However I was not happy with the result of ArcMaps mosaicing function and was told to use ENVI instead by a peer.
How do I get an image into ENVI and have it retain its geographic information that I gave it in ArcMap Could some one direct me a tutorial or help me by letting me know what...
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4 |
1533 |
30 Sep 2014 12:37 PM |
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1 Replies and 1634 Views
ENVI QUAC Details 1634 1
Started by Deleted User
Greetings,
I am currently working on comparisons between QUAC and a new atmospheric compensation algorithm we've developed, and I would like to know a bit more about the ENVI implementation of the QUAC algorithm. In particular:
How many endmembers are used in estimating the spectral standard deviation Are the endmembers filtered (e.g., by NDVI) using the method described in Bernstein et al 2006 &911&93
Are all pixels considered when computing the baseline spectrum If all pixels...
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1634 |
29 Sep 2014 12:48 PM |
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1 Replies and 1684 Views
Maximum Likelihood Classification ENVI 5.1 1684 1
Started by Deleted User
Dear All,
There is a problem with Max.Likelihood classification in ENVI 5.1. Every try using it, I got black image (all pixels are unclassified!)
I tried it many times with the same result
Please, help me solving this problem
Thanks
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1684 |
28 Sep 2014 03:47 AM |
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1 Replies and 2021 Views
Class_doit error 2021 1
Started by Deleted User
Hi, I am using ENVI/IDL language to batch classify images via K-means method.
In this process, I need to mask out zero values in images.
When I run my codes, it shows me this error message:
ENVI retrieve data: An error has occurred during processing.
Error: "POINT_LUN: negative position argument not allowed. Position: -1600, Unit: 106, File: d:\mask3."
Here is my code:
e=envi()
outfile='d:\test2class.img'
infile='d:\test2' ; test image file
envi_open_file, infile, r_fid=infid...
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2021 |
23 Sep 2014 09:28 AM |
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2 Replies and 2938 Views
Optimum Index Factor (OIF) using ENVI 2938 2
Started by Deleted User
Hi,
How to calculate Optimum Index Factor (OIF) for color combination using ENVI
Thank you
Mahmoud
where:
Stdi
standard deviation of band i
Stdj
standard deviation of band j
...
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2 |
2938 |
14 Sep 2014 11:54 PM |
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2 Replies and 1335 Views
save image as image file 1335 2
Started by Deleted User
Hi,
How to save a displayed image into an image formate using ENVI 5.1
This capability is available in ENVI classic as following:
(From the image window): File > Save image as > Image file
Output Display to Image File window appear at which we can select preferred resolution and output fie type ... etc.
My target is to export individual bands as 8-bit gray-scale geotiff files for making further analysis using another program
Thanks
Mahmoud
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1335 |
11 Sep 2014 07:53 AM |
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1 Replies and 2248 Views
Wavelength information 2248 1
Started by Deleted User
Greetings!
Just a quick question, is it possible to manually add wavelength information to individual bands in a multispectral image within Envi
Thanks!
Corse
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2248 |
10 Sep 2014 01:28 AM |
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4 Replies and 1516 Views
Problem encoutered regarding Landsat 7 SLC gapfill extension 1516 4
Started by Deleted User
Hi all
I ran the landsat 7 gap fill extension (http://www.exelisvis.com/MyAccount/ExtensionsDetail/TabId/1454/ArtMID/5446/ArticleID/14089/Landsat-Gapfill-tool-for-ETM-SLC-off-data.aspx) on the landsat 7 data.
However i noticed that the output .TIF file does not have 'dimensions' attached to it. When I renamed the file (.TIF) and tried to re-load it back into ENVI, it says it is not recognized as a standard format. However, it loads fine if I do not change the name of the output file.
This is wh...
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4 |
1516 |
10 Sep 2014 01:24 AM |
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2 Replies and 1565 Views
FLAASH Trouble with Landsat 8 1565 2
Started by Deleted User
Hi,
Every time I tried to use ENVI FLAASH in the atmospheric correction of Landsat 8 OLI data, I got Band 6 (SWIR 1) with zero reflectance values as the following:
Filename: C:\Users\Mahmoud\Desktop\LC8\proc\sr
Dims: Full Scene (58,224,061 points)
Basic Stats Min Max Mean Stdev
Band 1 -2478 7641 671.769534 557.361421
Band 2 -165 7185 638.778730 600.759837
Band...
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2 |
1565 |
07 Sep 2014 07:56 PM |