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2 Replies and 1484 Views Radiometric normalisation of hyperspectral images  1484  2 Started by  Malin Hoeppner Hi, I need to perform radiometric normalisation of two hyperspectral images that were acquired on the same day but do not overlap in order to do supervised classification. I was thinking to mosaic them but the seamless mosaic tool does not work for hyperpsectral data. Otherwise I found the exact tool to match two images using IDL (https://www.harrisgeospatial.com/docs/ENVIRadiometricNormalizationTask.html) but I can't use IDL so am looking for another way in ENVI. Thank you, Malin
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by  Malin HoeppnerJump to last post
08 Dec 2019 10:04 PM
4 Replies and 4903 Views ENVI FLAASH error  4903  4 Started by  Prabha Rupasinghe Hi, I am trying to apply FLAASH to a Landsat 8 image. I receive following error: Problem: The FLAASH program exited with the following errors: ACC error:Adjacents5: IDL error: Attempt to subscript VALUE with UAV is out of range. ACC_ADJACENTS5 ACC_HYPER2 ACC_ACC ENVI_ACC_EVENT ENVI_FLAASH_PROCESS_MANAGER IDLRTMAIN $MAINS$ We recently moved the license from an old computer to a new computer. I get this message after transferring the license and did not get it before. ...
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by  Prabha RupasingheJump to last post
15 Nov 2019 01:12 PM
25 Replies and 7940 Views FLAASH ACC Error  7940  25 Started by  kdsingh85
(Topic has multiple pages1 2 )
Hi Ben, I was trying to use FLAASH for my hyperspectral data atmospheric correction, but it is not processing any data and continuously showing error messages (ACC_AUTOCHAN: No water absorption channels selected). I fixed Error-1 by choosing water absorption band, but I never understand why it is still showing Error-2 (ACC error: convert7; IDL error: End of input record encountered on file unit:0); ACC_CONVERT7 ACC_HYPER2.... I am also attaching my FLAASH restore file. Let me know how I...
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by  MariMJump to last post
28 Oct 2019 01:56 PM
1 Replies and 1466 Views Issue with the Y scale factor!  1466  1 Started by  Stavroula Giannakopoulou Hello everyone, I am trying to resample a number of spectral signatures from a specific spectral library. The problem is that I can't figure out which is the Y scales factors and the Wavelength units that are asked in the window 'Scale Incoming Curve Data'. Is there a way to identify them somehow Any advice will be very helpful!T hank you very much in advance!
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by  MariMJump to last post
09 Oct 2019 12:22 PM
1 Replies and 2035 Views Calculate average value of pixels  2035  1 Started by  fatma tarek I want to know how to Calculate average value of pixels in ENVI
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by  MariMJump to last post
16 Sep 2019 09:13 AM
0 Replies and 1695 Views convert kml file to shape file  1695  0 Started by  fatma tarek I want to know how convert kml file to shape file, which contain ( .dpf, .shx and .shp) files.
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14 Sep 2019 05:41 AM
4 Replies and 1828 Views PROBLEMS WITH PROJECTIONS WHEN I OPEN AN IMAGES IN ENVI 4.3  1828  4 Started by  Angela Figueroa Hi, I have installed ENVI 4.3 on my computer. Normally I can open up to 7 times the program without any problem, but then, when I want to open images (raster, Landsat images, Sentinel images, Rapideye Images, etc) in ENVI, I have problems because a message appears related to the projections of the images I want to upload (ENVI ERROR: FAILED TO SET PROPERTY. FAILED TO CREATE COORDINATE SYSTEM FORM STRING: PROJCS UTM_ZONE_............). The only solutions I have is to reinstall the software, I've ...
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by  MariMJump to last post
12 Sep 2019 01:43 PM
2 Replies and 1513 Views Set a threshold for unclassified class at SAM method  1513  2 Started by  Stavroula Giannakopoulou Hell everyone, I am trying to find out a tool at ENVI like SemiAutomatic Classification Plugin at QGIS, in order to set a threshold for my classes, so as to set a greater amount of pixels at the unclassified category, during the SAM method. Is there a tool like this one at ENVI Thank you very much for your help!
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by  Stavroula GiannakopoulouJump to last post
06 Sep 2019 02:43 AM
2 Replies and 1942 Views MODIS hdf data in ENVI  1942  2 Started by  Jakob Rieser Hello everybody! I want to open MODIS data with ENVI 5.5.2 on my 64 bit Windows 10 machine to use it in the Georeference MODIS tool. The data is in *.hdf format that is supported by ENVI. I'm using the MOD11_L2 product, which contains 7 subdatasets/layers. One of them is the LST (Land Surface Temperature) layer I'm interested in. But out of those 7 subdatasets only 5 show up when opening the *.hdf file (Quality, Latitude, Longitude, Emis 31, Emis 32). The LST and Error_LST layers unfortunatel...
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by  Jakob RieserJump to last post
27 Aug 2019 12:39 AM
8 Replies and 1780 Views Selection of spectral signatures  1780  8 Started by  Stavroula Giannakopoulou Hello everybody, I have to solve an issue with my Hyperion data. I am trying to implement the process of 'Spectral Hourglass Wizard'. The problem is that I have detected 15 endmembers, which also are related to many spectral signatures at the spectral library. So, I implement the process of 'Spectral Hourglass Wizard', but I don't know how to evaluate the results and if for example, it is a necessity to change the spectral signature of a mineral. I was thinking of the tool 'Spectral Analyst',...
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by  Stavroula GiannakopoulouJump to last post
22 Aug 2019 03:13 PM
5 Replies and 1635 Views MNF to Hyperion data  1635  5 Started by  Stavroula Giannakopoulou Hello everybody, I have a Hyperion image, in which I implemented an atmospheric correction, georeference and two masks, in order to avoid the vegetation and the water in the image. I have already removed the 'Bad bands' and my image includes 112 bands. The problem is that I want to apply the n-D Visualizer, but at the diagram of the eigenvalues, at the step of MNF, the values that I received for the eigenvalue is better than the value of 1 (specifically the lowest value is 1.02). So I would l...
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by  MariMJump to last post
14 Aug 2019 10:58 AM
1 Replies and 1818 Views Correction of DEM  1818  1 Started by  sacha landereethe Hi, I have generate a DEM with some drone's pictures but the altitude is wrong. Can I correct this information thanks to your software I have some GPS data and i would like to correct my DEM with them
1 1818
by  MariMJump to last post
29 Jul 2019 11:46 AM
3 Replies and 4057 Views Trouble Verifying Account  4057  3 Started by  Claire Leyden I received a verification e-mail, but when I click on it, I'm prompted to login. Once I login I receive the message 'You are using an unverified account. Please verify your account by clicking on the link contained in the verification email that has been sent to you.'
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by  MariMJump to last post
11 Jun 2019 10:24 AM
8 Replies and 2436 Views PCA-All the information are detected at the first band  2436  8 Started by  Stavroula Giannakopoulou Hello everyone! I implemented at Hyperion data the PCA method, in order to reduce dimensionality. After the implementation, I observed the results and the 99.5 of the information is detected at the first band (the total number of bands is 112). So, I would like to ask if this is OK or I should look again at the procedure. Thank you very much in advance for your help!
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by  MariMJump to last post
09 May 2019 08:34 AM
1 Replies and 1725 Views Dark Substraction Correction in Modeler  1725  1 Started by  Anna Wojtowicz-Nowakowska What should I put in values when I use dark subtraction correction function in Modeler I have tried 'STATS.MIN' but I received massage box: Invalid parameter named Values. Expression must be a structure in this context: STATS.
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by  MariMJump to last post
25 Apr 2019 10:26 AM
4 Replies and 2244 Views Worldview-3 CAVIS bands  2244  4 Started by  Aysegul Daggez Hello everybody, I am going to get a Worldview-3 MS and SWIR bands for mapping alteration in our project area. For the accuracy of atmospheric correction do you think that I need CAVIS bands. Has anybody used CAVIS bands for this purpose before I will be very happy if you could you share your experiences about Atmospheric correction of WV-3 data. By the way I have FLAASH module. Thanks in advance Aysegul Daggez
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by  Aysegul DaggezJump to last post
11 Apr 2019 01:41 AM
1 Replies and 1944 Views Georeferencing - Orthorectification - Mosaicking  1944  1 Started by  Stavroula Giannakopoulou Hello! I' m trying to apply a methodology that icludes georefercing - orthorectification and mosaicking. First of all because of the fact that the stripes of my images have lost their georeference, i import the right georeference from the spatial reference of images that have more bands. After that, i don't know if i should orthorectify my images and how. Is it essential Finally, because my images iclude parts that are repeated, i want to create a mosaic with those stripes of images so i don't ...
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by  MariMJump to last post
20 Feb 2019 11:10 AM
1 Replies and 2226 Views How to calculate Nitrogen index (NDNI) from Micasense Rededge?  2226  1 Started by  Stefanus Agung How to calculate Nitrogen index (NDNI) from Micasense Rededge
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by  MariMJump to last post
18 Feb 2019 04:57 AM
2 Replies and 2011 Views PCA-Forward PCA  2011  2 Started by  Stavroula Giannakopoulou Hello, I'm trying to implement the PCA method. I chose the bands that i think that they don't contain noise and i implemented 'Forward PCA Rotation New Statistics and Rotate'. After that i implemented th 'Forward PCA Rotation Existsing Statistics' but i can't figure out what should i change in this method. Should i choose the PCs that i think that they contain the information that i needAnd after that i should implement the Reverse PCA with the bands that contain information so as to have a ...
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by  Stavroula GiannakopoulouJump to last post
14 Feb 2019 02:48 AM
4 Replies and 1867 Views Represent pixels from different bands to an image  1867  4 Started by  Stavroula Giannakopoulou Hello!I' m trying to represent at my image pixels from the same image but from different bads. In many bands i have very high values of reflectance because of the sensor. So i' m trying to find alla those pixels, which may be different from the one band to the other. Please let me know if you have any advice! Thank you very much!
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by  Stavroula GiannakopoulouJump to last post
30 Jan 2019 10:39 AM
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