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9 Replies and 280 Views
Hyperion L1GST Radiancen Gain Values 280 9
Started by Matt Spencer
Hi, I'm following the EO-1 Hyperion Vegetation Analysis Tutorial to remove bad bands and convert radiance to reflectance. However, the radiance gain values are slightly different to those in the tutorial. For example, Bands 1 - 70 in the tutorial all have radiance gain values of 0.025. However, in my case the values for Bands 1 - 70 alternate between 0.0125 and 0.025 e.g Band 1 value = 0.0125, Band 2 = 0.025, Band 3 = 0.0125, Band 4 = 0.025. Is this normal If not does anyone know a reaso...
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by Mari Minari 11 Jul 2017 06:54 AM |
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5 Replies and 619 Views
user defined projections in ENVI 5.4/IDL 8.6 619 5
Started by Frank Morgan
I have user defined objects in three files - datum.txt, geogcs.txt, and spheroid.txt - that I've put in envi54/idl86/resource/pedata/user_defined and IDL 8.6/ENVI 5.4 do no see them. They don't show up with map_pe_get_option_table, and are they're not available when I try to do projections. These same files worked when placed in similar directories in IDL 8.4-8.5 and ENVI 5.2-5.3. Did the mechanism for user defining objects change Frank
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by Mari Minari26 Jun 2017 02:55 PM |
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3 Replies and 244 Views
Can I perform FLAASH correction on airborne SASI hyperspectral images 244 3
Started by gou sheng
Hi, I have collected airborne hyperspectral SASI images (950 nm ~ 2450nm), and want to convert the raidance to reflectence by performing FLAASH. However, when I perform FLAASH atmosphere correction module in ENVI, it shows the following error 'ACC_AVHEAD: Error -- some channels found outside 100 to 30000 cm-1'. So I want to know can I use FLAASH module to perform an atmospheric correction on SASI images If I cannot directly perform, can I 'join' CASI and SASI spectra and choose the sensor type ...
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by Mari Minari23 Jun 2017 06:04 AM |
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2 Replies and 247 Views
Writing ENVI Raster from ENVI Task 247 2
Started by jareds1
Hi all, I'm trying to write a foreach loop to convert all bands in an existing ENVI Raster into output PNGs. When I run the following loop: 'foreach i, bandGet do begin Subset = ENVISubsetRaster(raster, bands=&91;i&93;) print, (baseName bNames&91;i&93;) ; Creating the PNG routine from ENVI Docs Task = ENVITask('ExportRasterToPNG') Task.INPUT_RASTER = Subset Task.OUTPUT_RASTER_URI = (baseName bNames&91;i&93;) Task.Execute Task.output_raster ...
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by jareds112 Jun 2017 03:25 PM |
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3 Replies and 289 Views
background pixels in classification 289 3
Started by AYSIN KUZUCU
Hi,
I want to classify SPOT 7 multispectral image in ENVI 5.1.
After I created subset image of my study area using ROI, background data (the pixel values outside of the ROI data) occurred. Background data has zero pixel value.
In order to mask background pixels, I created ROI from band thresholds and chose thresholds parameters for all bands as min value=0; max values=0 and then saved ROI to .xml.
I selected the subset image as classification input file. I imported "mask ROIs xml"...
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by Mari Minari12 Jun 2017 08:51 AM |
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1 Replies and 192 Views
Atmospheric correction in ENVI, export to ERDAS 192 1
Started by Matt Spencer
I am working on a project using Hyperspectral imagery and have ERDAS Imagine on my home PC and have access to ENVI on another PC at University. Is it possible, for example, to perform the atmospheric correction in ENVI, then import it into ERDAS, and then perform Principal Component Analysis, Minimum Noise Transformation (MNF), supervised classification etc The file is a .l1r file from EO-1 Hyperion downloaded from GloVis. I read here (https://gis.stackexchange.com/questions/91021/imagine-fi...
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by Mari Minari12 Jun 2017 05:46 AM |
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1 Replies and 395 Views
Deep Learning 395 1
Started by Lorenzo Bernardi
Hi all, i am looking for a deep learning classification solutions in order to extract features and classification from VHR (0.50 and 0.30 meters) multispectral images. Can someone suggest a link to IDL/ENVI based solutions for deel learning Thank, Lorenzo
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by Mari Minari01 Jun 2017 11:47 AM |
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1 Replies and 269 Views
error matrix for unsupervised classification 269 1
Started by khaled zerroug
Hi, I work on a diachronic map of vegetation, I use RGB NDVI technique , this technique is based on the use of three ndvi taken in three different dates to quantify the change of the green biomass through the three dates (in my case : 1984, 2001, 2011), In this technique a non-supervised classification was used to quantify the changes. Currently, I find a problem to produce the matrix of confusion, When I read in the literature authors says that the matrix of confusion is done on the basis of ...
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by Mari Minari01 Jun 2017 11:40 AM |
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4 Replies and 439 Views
FLAASH Error while Processing GeoEye-1 Image 439 4
Started by Katie Corcoran
While running FLAASH on a 4-band GeoEye-1 image, I receive the following error: 'Problem: The FLAASH program exited with the following errors: ACC error: avrd: IDL error: Illegal subscript range: FIMAGE. ACC_AVRD <( 9)> ACC_HYPER2 <( 524)> ACC_ACC <( 191)> ENVI_ACC_EVENT <(3179)> ENVI_FLAASH_PROCESS_MANAGER <( 581)> $MAIN$ <( 0)>' FLAASH is running properly on 8-band WorldView-2 images. What might be causing this error
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by Katie Corcoran19 May 2017 07:17 AM |
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4 Replies and 319 Views
Linear 2 Stretch for color display 319 4
Started by Dulci Avouris
Hello! I am wondering if the linear stretch function has changed between ENVI 5.3.1 and 5.4. The exact same image is displayed differently using the default 2 linear stretch. I think the calculation of the 2 & 98 edges of the histogram is not correct in 5.4. Is this a known issue When I use the histogram stretch tool in 5.4 the 2 linear stretch edge lines are actually at something like 6-7 & 99.98. I can manually move those lines to the correct positions (2, 98) and match the color dis...
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by Dulci Avouris17 May 2017 12:00 PM |
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1 Replies and 320 Views
ENVI classic interface on Linux 320 1
Started by Lorenzo Busetto
Hi all, I was wondering if there is any way to change/improve the 'appearance' of the ENVI classic GUI on Linux. Not a big deal, but it is a bit old-style and ugly, and the file browser is really cumbersome to use (at least on my system - KUBUNTU 16.10 - unfortunately I cannot post an image to show that). It's not a big deal, but I'd appreciate any suggestions. regards, Lorenzo
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by Mari Minari17 May 2017 09:20 AM |
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1 Replies and 238 Views
Using Toolbox Tools Via Command Line 238 1
Started by Brandon Tran
Is it possible to run the toolbox tools through a command line I am interested in using the 'Photographic Stretch' tool on serveral GeoTiff image products. I would like to write a shell or python script that would be able to execute a command to call the 'Photographic Stretch' tool on these images. Thank you.
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by Mari Minari16 May 2017 12:00 PM |
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5 Replies and 1167 Views
How can I open Sentinel 2A image using ENVI 5.3 1167 5
Started by Mathilde Marchandon
Hello,
I have downloaded Sentinel data from the scihub.copernicus website and I would like to open the ortho image with ENVI 5.3. In File>Open external file, I don't have the Sentinal-2A menu option. I can open the jpeg2000 file located in the "granule" directory from the File>Open image file menu option but it opens the image without any georeferencing. How can I open the image with the georeferencing
Thank you in advance for your help.
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by Mari Minari16 May 2017 11:19 AM |
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0 Replies and 778 Views
ENVI Crop Science 1.0 release 778 0
Started by Scott Paswaters
I am excited to announce that ENVI Crop Science 1.0 is now available. This new product provides remote sensing analytics for precision agriculture and agronomy. It is designed to work with satellite, aerial, and UAV imagery in both a desktop and enterprise environment. Functionality includes: crop counting, crop metrics (crop health), and hotspot analysis. For more information please visit http://www.harrisgeospatial.com/ProductsandTechnology/Software/ENVI.aspxprecisionag. Please contact yo...
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12 May 2017 02:10 PM |
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1 Replies and 264 Views
ENVIPointCloudViewer not supported on linux 264 1
Started by John Meyer
Hello, I am running Ubuntu 16.04 and ENVI 5.4. I installed ENVI yesterday. I tried to open a .las file and I get an error 'ENVIPointCloudViewer not supported on linux' Additionally, I am unable to copy a file path (or anything) into the directory path window at the open file GUI - not sure if that is a bug or if that is the excepted functionality. Thanks for any help. John
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by Jason Wolfe09 May 2017 07:21 AM |
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2 Replies and 307 Views
ASTER L1T FLAASH Error 307 2
Started by Praveen Kumar
Hi, FLAASH module is throwing error, when I want to do atmospheric correction on VNIR and SWIR bands of ASTER L1T . The error is 'Input image has more bands (9) than expected for the selected sensor (14). Please check the sensor type or set to UNKNOWN-MSI if using a custom filter function'. What can be the cause for the error Thanks.
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by Praveen Kumar02 May 2017 11:57 PM |
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6 Replies and 398 Views
FLAASH 398 6
Started by Shuangyan He
When I tried to using ENVI FLAASH to do the atmospheric correction for MISR data over water, it reminded me to input the 'filter Function File' in Multispectral Settings. After I input the sensor spectral response file, it reminded me the error of 'Attempt to subscript FF_WL with is out of range'. Is this because the MISR sensor has limited bands, as it only has four bands of 446, 558, 672 and 866nm Thanks!
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by Shuangyan He01 May 2017 10:24 AM |
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1 Replies and 255 Views
Help Intalling ENVI 5.3 255 1
Started by adams kpewa
Hello All,
Can someone help me with steps to install ENVI 5.3 on a Linux ( red hat 6.x ) virtual machine( command line) please . I have Extracted the tar file but I can see so many files and I have no idea which ones I should copy to my server and start the installation. Thanks in advance
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by John Meyer29 Apr 2017 10:19 AM |
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10 Replies and 258 Views
ENVI Crashes on Linux 258 10
Started by Rowan Gaffney
Hello, I am running ENVI and IDL on Ubuntu 16.04 LTS. At first it was working fine, but now it keeps crashing all the time. This is the error I get:
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00007f98ea5e7d8b, pid=3863, tid=140296014931712
JRE version: 7.0_25-b15
Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 mixed mode linux-amd64 compressed oops)
Problematic frame:
C &91i965_dri.so0x20ad8b&93 _init0x1bf86b...
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by John Meyer29 Apr 2017 10:01 AM |
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1 Replies and 319 Views
Intrepretation of MNF eigenvector matrix 319 1
Started by Rami Piiroinen
Hi all, I performed minimum noise fraction transformation on a hyperspectral image with 129 bands. This produces 129 new bands, as it should. Okay, then I get the eigenvalues that I can use to interpret which bands contain information and which bands contain noise. Now I need to understand which bands constituted most to each new MNF band. To my understanding we need to look at the eigenvector matrix to see the 'loading' from each original band. But, which way should we look at the matrix...
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by Mari Minari26 Apr 2017 02:12 PM |