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5 Replies and 1578 Views ROI help in 5.2  1578  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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15 Nov 2014 05:35 PM
1 Replies and 1501 Views ROI error  1501  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
1 1501
13 Nov 2014 05:38 PM
1 Replies and 1662 Views Seamless Mosaic Problem  1662  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...
1 1662
10 Nov 2014 02:33 AM
1 Replies and 1697 Views Data from ROI to an array (and then to a Text File)  1697  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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07 Nov 2014 02:34 PM
1 Replies and 1388 Views HICO processing with Envi 5.1  1388  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
1 1388
06 Nov 2014 12:36 AM
1 Replies and 1865 Views Need Help Can&39;t Install ENVI 5.2  1865  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...
1 1865
28 Oct 2014 04:28 AM
1 Replies and 1479 Views Changing order of ROIs?  1479  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.
1 1479
24 Oct 2014 04:17 PM
4 Replies and 1417 Views Adding Geometry from Non-Closed Polygons  1417  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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24 Oct 2014 11:02 AM
1 Replies and 1326 Views IAR and LogRES  1326  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
1 1326
19 Oct 2014 02:10 PM
4 Replies and 1452 Views Flaash - WV-2 pan  1452  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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14 Oct 2014 01:05 PM
3 Replies and 1453 Views Missing Vegetation Indices?  1453  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.
3 1453
07 Oct 2014 02:36 PM
4 Replies and 1514 Views ArcMAP to ENVI (georeferencing help)  1514  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...
4 1514
30 Sep 2014 12:37 PM
1 Replies and 1598 Views ENVI QUAC Details  1598  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...
1 1598
29 Sep 2014 12:48 PM
1 Replies and 1664 Views Maximum Likelihood Classification ENVI 5.1  1664  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
1 1664
28 Sep 2014 03:47 AM
1 Replies and 1994 Views Class_doit error  1994  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...
1 1994
23 Sep 2014 09:28 AM
2 Replies and 2891 Views Optimum Index Factor (OIF) using ENVI  2891  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 ...
2 2891
14 Sep 2014 11:54 PM
2 Replies and 1300 Views save image as image file  1300  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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11 Sep 2014 07:53 AM
1 Replies and 2216 Views Wavelength information  2216  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
1 2216
10 Sep 2014 01:28 AM
4 Replies and 1485 Views Problem encoutered regarding Landsat 7 SLC gapfill extension  1485  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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10 Sep 2014 01:24 AM
2 Replies and 1546 Views FLAASH Trouble with Landsat 8  1546  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...
2 1546
07 Sep 2014 07:56 PM
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