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1 Replies and 31 Views Using FLAASH with RapidEye Level 3A image  31  1 Started by  André Baldauf Hello, I am trying to perform an atmospheric correction on RapidEye Level 3A data. From the product specification, I could derive the delivered product DN represent radiance in 1/100th of a W/m² sr ym ('This scaling converts the (relative) pixel DNs coming directly from the sensor into values directly related to absolute at sensor radiances. The scaling factor is applied so that the resultant single DN values correspond to 1/100th of a W/m2 sr µm.'). With that information, I choose 0.01 as t...
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by  Mari MinariJump to last post
12 Oct 2017 12:26 PM
1 Replies and 87 Views IDL has stopped working error  87  1 Started by  Thong Hi every one, When I open Envi Zoom, the error occurs as "IDL has stopped working". Envi Classic is still OK. Are there solutions for it I am using Windows 7 64bit. Kind regards,
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by  vaanko ahmadiJump to last post
12 Oct 2017 12:15 PM
1 Replies and 29 Views SVM  29  1 Started by  Bisma Qazi Can I get to know that how does SVM module in ENVI estimate the probabilities Although, a reference (Wu et al., 2004) has been provided in the help contents but I am unable to follow which method does ENVI implement for this
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by  Mari MinariJump to last post
11 Oct 2017 12:37 PM
2 Replies and 85 Views MODIS MOD13Q4N  85  2 Started by  Jose Manuel Lattus How can I open an hdf MODIS MOD13Q4N in ENVI I can't-do it... ArcMAP open the file with no trouble,
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by  Jose Manuel LattusJump to last post
25 Sep 2017 07:50 AM
1 Replies and 64 Views Management of ALLOW_MULTIPLE  64  1 Started by  allendej Apologies for the basic question, I am new to the ENVI API. I would like to import multiple rasters using SelectInputData(/ALLOW_MULTIPLE). If I have something like this: Flats = UI.SelectInputData(/RASTER, /ALLOW_MULTIPLE, /TITLE 'Select Frames lowest to highest') Is it necessary to then do: L9 = e.OpenRaster(Flats&91;0&93;) L8 = e.OpenRaster(Flats&91;1&93;) L7 = e.OpenRaster(Flats&91;2&93;) Because the input to OpenRaster needs to be a scalar string, which the Fl...
1 64
by  Mari MinariJump to last post
13 Sep 2017 12:58 PM
1 Replies and 33 Views Task output with GUI  33  1 Started by  allendej Is it possible to define the output from a task using a GUI, similar to envi_pickfile or dialog_write_image I don't want to change the OUTPUT_RASTER_URI keyword manually each run.
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by  allendejJump to last post
12 Sep 2017 12:02 PM
2 Replies and 81 Views Raster assignment in band math  81  2 Started by  allendej Hello, I am new to using the ENVI API, but I would like to perform band math using bands from multiple rasters as input. When using the ENVI GUI this is easy to do as I can simply click to assign bands from differing images. I was thinking of creating a large metaspectral raster and combining bands from different images into one large image, but I don't think it would be efficient for what I am trying to do. As an example, I have two 6 band images and would like to process each band us...
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by  allendejJump to last post
11 Sep 2017 05:42 AM
14 Replies and 308 Views Landsat GeoTiff with xml?  308  14 Started by  Darcy Boellstorff Hello, I've downloaded a Landsat USGS surface reflectance product in GeoTiff format. However, the metadata are not in the usual _MTL format but as an XML file. How does one open this in ENVI Thank you
14 308
by  Mari MinariJump to last post
09 Sep 2017 05:48 AM
4 Replies and 103 Views Using MNF bands in linear spectral unmixing  103  4 Started by  Edward Kelly Hi, I read somewhere in the academic literature that you can't use the MNF bands directly in the linear unmixing process and that you should use MNF inverse transformed bands as input Is this true as I haven't seen it mentioned anywhere in the ENVI documentation. Thanks.
4 103
by  Edward KellyJump to last post
01 Sep 2017 02:38 PM
1 Replies and 115 Views Smile effect correction  115  1 Started by  ARNAB Dear Sir/mam, How to the correction 'smile effect' in Hyperion data using ENVI software
1 115
by  Mari MinariJump to last post
28 Aug 2017 10:37 AM
2 Replies and 102 Views Inverse MNF Transform  102  2 Started by  Matt Spencer Hi, I'm using MNF as a dimensionality reduction technique for hyperspectral image classification. I have estimated the noise statistics from the data using a spectrally uniform area, and have output 9 MNF components for use in classifications. I am using endmembers derived from the image (ROIs) for the classifications. I have read in the literature some using the Inverse MNF to transform back to the original data space and number of channels. Am I correct in thinking there is no need to use an I...
2 102
by  Matt SpencerJump to last post
24 Aug 2017 08:53 AM
0 Replies and 96 Views ENVI 5.4 is slow to start on Linux  96  0 Started by  David Pogorzala Hi. I manage an installation of ENVI 5.4 and IDL 8.6 on a Linux cluster. The software is installed on six servers, while the license server is on a separate host. When I launch ENVI on the command line, the license is found ok and the splash screen appears, but then it hangs for a long time. Finally after roughly 50 minutes the splash screen goes away and the main GUI appears. Couple other notes: IDL 8.6 starts up within a few seconds, as does ENVI Classic. Modern ENVI is the only thing that ...
0 96
23 Aug 2017 01:39 PM
5 Replies and 153 Views Accuracy Assessment  153  5 Started by  Matt Spencer Hi, I have a classified image (Maximum Likelihood) that I want to run an accuracy assessment on, however I am unsure of the correct steps in ENVI. I have done it before in Erdas Imagine where a set of random points is generated and then you determine the 'true' class of each point, which then results in an overall accuracy for the classification. I am using 10m Sentinel imagery to identify the 'true' classes. I have tried the 'Generate Random Sample Using Ground Truth Image' tool using my ...
5 153
by  MARK EstelleJump to last post
22 Aug 2017 02:44 AM
4 Replies and 84 Views Applying a mask when using Support Vector Machine  84  4 Started by  Edward Kelly Hi, I am using a mask to mask out areas of NoData, however when I run a Support Vector Machine there is no option to apply a mask and therefore the areas that were previously classified as 'masked pixels' in other classifications (e.g Spectral Angle Mapper) are now classified as a land cover. Is there a way to apply a mask when running a SVM Thanks,
4 84
by  Mari MinariJump to last post
21 Aug 2017 10:30 AM
1 Replies and 73 Views FLAASH atmospheric correction  73  1 Started by  khaled zerroug Hello, I am beginner in the use of FLAASH atmospheric correction , I want aske, is the atmospheric correction FLAASH includes at the same time radiometric correction, in other words, Flaash atmospheric correction correction is both atmospheric and radiometric correction. thank you a lot.
1 73
by  Mari MinariJump to last post
17 Aug 2017 01:15 PM
0 Replies and 91 Views ENVI Crop Science 1.0.1 release  91  0 Started by  Scott Paswaters I am pleased to announce the release of ENVI Crop Science 1.0.1. This release builds on the crop counting capabilities of 1.0 by adding functionality to identify crop rows and eliminate outlying crops as well as identifying gaps (missing crops) along the rows. There is also a new capability to create a geometry based crop location grid that is a useful alternative to image based crop counting for fields with closed canopies. For more information please visit http://www.harrisgeospatial.com/...
0 91
16 Aug 2017 12:02 PM
1 Replies and 108 Views Using one set of ROIs on multiple raster files for MLC  108  1 Started by  Audrey Riddell I am working on a large-scale ML classification project that consists of over 100 raster files. Because the files are too large to stitch together and classify as one image, I would like to find a way to create a set of ROIs from one or two rasters that can then be applied to the entire set. Can this be accomplished in ENVI I would imagine the ROIs can be converted to general spectral signatures that can be identified in each raster, but I haven't found a tool that can accomplish this.
1 108
by  Mari MinariJump to last post
09 Aug 2017 12:15 PM
2 Replies and 287 Views ENVI 5.4 doesn't start  287  2 Started by  Hasan Sarptas Hi, I've new installed ENVI 5.4.1. on Windows 10 x64 Education (Build 15063). After install ENVI starts and works fine; but in next runs it does not start! In splash screen it give warning: M'Expression must be a scalar or 1 element array ... : <BYTE Array&91;2&93;>' Here is the screenshot: https://i.imgur.com/fRy0YAK.png I've uninstalled and removed all files left behind ENVI install and clear registry. Then installed the ENVI again; but nothing changed! I need your help /...
2 287
by  Hasan SarptasJump to last post
07 Aug 2017 06:56 AM
1 Replies and 120 Views Sentinel SAFE format from AWS  120  1 Started by  Luca Cicala Hi, I use to download the Sentinel 2 images from Amazon AWS service. You can download a single tile and each single band in jp2k format. However, how can 'reconstruct' the original S2 SAFE format in order to properly open it with ENVI 5.4, instead of open each band singularly. Thanks in advance, Luca
1 120
by  Mari MinariJump to last post
03 Aug 2017 02:54 PM
1 Replies and 161 Views How to change Scatter plot style in ENVI 5.3?  161  1 Started by  Lee Ramanujan Normally, the 2D scatter plot like this http://s14.sinaimg.cn/middle/002ajk6hzy6O40b3o5v4d&690 (Open the link, you can see the scatter plot figure). The points appear dense and dark in the figure. However, in other case, they appear sparse and faint, like this http://s5.sinaimg.cn/middle/002ajk6hzy6O40aZBU8e4&690 (Open the link, you can see the scatter plot figure). How to change the style from one to the other Many thanks!
1 161
by  Mari MinariJump to last post
03 Aug 2017 02:50 PM
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