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1 Replies and 2214 Views
Importing data from MATLAB to ENVI 2214 1
Started by Deleted User
Hello all!
I have data in Matlab - hyperspectral imagery that I need to get back to ENVI for viewing. How can I accomplish that
Originally I exported the hyperspectral image in TIFF format onto MATLAB. After running a couple of algorithms there, I want to get back the data to ENVI so that I can view the changes and differences. The images cannot be viewed in MATLAB. Is there anyway to do this
Thank you.
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1 |
2214 |
18 Feb 2015 01:45 AM |
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1 Replies and 1294 Views
Saving training samples - Feature Extraction-Example Based 1294 1
Started by Deleted User
Hi, I am running Feature Extraction-Example Based. I wish to classify 6 classes. I first segmented the image, then collected training samples. After collecting samples for the first class, I was able to save the samples. However, when I add another class to collect samples, the Save option is greyed out. It does not allow me to save anymore. I want to save the samples of all 6 classes in one shapefile so that I can edit them if needed. I would appreciate any advice. Thank you very much.
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1294 |
17 Feb 2015 09:42 PM |
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1 Replies and 1618 Views
FLAASH 1618 1
Started by Deleted User
HOLA AMIGOS MI UNIVERSIDAD TIENE EL ENVI 5.1 PERO NO ME SALE EL FLAASH DE UNA WORLDVIEW-2. Primero obtuve la radiance en formato bil por 0.10. Por favor, alguien puede indicar para poner los parametros de flaash, pues a pesar que he puesto todo no me sale
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1 |
1618 |
13 Feb 2015 03:45 PM |
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2 Replies and 1626 Views
Exporting High Resolution Images for Printing 1626 2
Started by Deleted User
Hello,
I'm working with some hyperspectral imagery in ENVI 4.8 and I need to save high resolution (300 ppi) copies of some of my images to use for publications. I'd like to be able to save the image as a TIFF or postscript file so that I can open it in Adobe Photoshop or Illustrator for arranging it in a figure. However, the Save Image As... function produces very low resolution images; 64 ppi is the best I've been able to achieve. Is there a way to export images from ENVI 4.8 (or 4.4) in higher...
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1626 |
10 Feb 2015 03:16 PM |
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1 Replies and 1464 Views
Incident angle image 1464 1
Started by Deleted User
Hi
How can i get an georeferenced incident angle image for RADARSAT-1
The incident angle image I'm getting is without any georeferenced information.
Is it possible to get an incident angle image georeferenced like the original RADARSAT-1 image
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1464 |
10 Feb 2015 11:46 AM |
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1 Replies and 3087 Views
Thermal Atmospheric correction - TIMS radiance tool 3087 1
Started by Deleted User
http://www.exelisvis.com/docs/Atmosph... I am trying to correct Landsat 8 thermal data. In the section on thermal atmospheric correction it refers to the TIMS radiance tool to convert the data to radiance. Does this have another name because I can not find it in the toolbox or has the tool be renamed. Thanks for your help.
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3087 |
09 Feb 2015 11:09 PM |
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4 Replies and 1967 Views
FLAASH on Hyperion GeoTiff data 1967 4
Started by Deleted User
Hello!I am trying to perform FLAASH on Geotiff Hyperion Data. I would like to know the steps to be followed.
So far, I have done : Input the .tiff files onto ENVI.
Also, 1) I read that VNIR and SWIR bands need to be divided by 40 and 80 respectively. Is this value correct
2) Can Radiometric Calibration be done directly
Is this is step order:1) Input -> calibration by dividing VNIR and SWIR by 40/80 -> Radiometric Calibration -> FLAASH; or
2)Input -> -> Radiometric Calibration -> FLAASH.
Whic...
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4 |
1967 |
08 Feb 2015 11:36 PM |
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1 Replies and 1546 Views
Aster IA and IB products loading into Envi 1546 1
Started by Deleted User
Hi
I'm new to ENVI so start at the beginning please. I have purchased a 1B data set which I downloaded as a .tar dataset (ASTL1B_0102010044381501290001.tar) when I uncompressed the dataset using winzip I have a series of files. None of these are *.HDF files so how do I load them into ENVI please
prb0110.brs
prbr0111.jps
prbr0112.jpg
prbr0113.jpg
prdat011.dat
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1546 |
08 Feb 2015 04:43 PM |
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4 Replies and 1626 Views
Post Classification 1626 4
Started by Deleted User
Good afternoon,
I am a new ENVI user.
I just spent a lot of time working on a supervised (MLC) classification but some pixels are still not classified correctly and none of the post-classification tools are useful right now...Below my major problem:
I work in a mountain environment and I use a Landsat 5 TM from 2009 (Composite IR, 4, 3, 2). I have a class representing 'Glaciers' and another one representing 'Bare Soils'. Some of the 'Bare soils' pixels are located inside the 'Glaciers' class (b...
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4 |
1626 |
03 Feb 2015 01:29 PM |
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1 Replies and 1503 Views
neural net classifcation on LISSIII tiff multispectral image 1503 1
Started by Deleted User
Dear All,
trying to conduct classifikation with Neural Net i had this error message:
"envi_neural_net_doit: An error has occured during processing
Error: "Attempt to subscript PtHeapVar944 with K is out of range. The result may be invalid" "
WHAT DOES IT MEAN, WHY I CANNOT WORK WITH NEURAL NET CLASSIFIER
Thanks and regards in advance
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1503 |
30 Jan 2015 04:43 AM |
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3 Replies and 2051 Views
How to reclass a Raster 2051 3
Started by Deleted User
Hi
I'm a new user of ENVI 4.8
I can't understand how to perform a reclass in a raster ..
I'd like to make a boolean mask from my raster (8 bit integer) and I need to change te DN value:
old DN value - > new DN value
0 -> 0
1 -> 0
2 -> 1
3 -> 0
4 -> 1
5 -> 0
and so on..
Any idea
Thanks in advance!
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2051 |
29 Jan 2015 09:39 AM |
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1 Replies and 1552 Views
ENVI tutorial downloading problem 1552 1
Started by Deleted User
Hello,
I would like to practice the tutorial available in the ENVI Tutorials. But in my case the pdf files (which are in left side under ENVI Tutorial) are downloadable but the datasets which are in the upper right corner are inactive. I have logged in to Exelis but not able to download.
Please kindly recommend me how to download the dataset from this site.
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1552 |
26 Jan 2015 04:39 PM |
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1 Replies and 1388 Views
variation on flat field correction 1388 1
Started by Deleted User
ENVI's flat-field correction applies the equation: sample/white reference (where sample = pixel spectrum). But I want to use the equation &91sample-dark&93/&91white-dark&93. I have heard about using band math to accomplish this, but I am not sure how to go about it with the images I have.
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1388 |
23 Jan 2015 01:48 PM |
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1 Replies and 1263 Views
ENVI 5.2 won&39;t launch in Yosemite 1263 1
Started by Deleted User
ENVI 5.2 is not launching once mac upgraded to Yosemite 10.10.1 OS. IDL works fine. X11 launches when you click to launch ENVI, but ENVI itself does not. No error message either.
Have reloaded ENVI/IDL and rebooted the mac. Makes no difference.
Anyone else seeing this If so, any fix out there
BTW....did load java 6 so IDL works. X11 (XQuartz is at current 2.7.7 version as well)
Thanks,
Lisa
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1263 |
23 Jan 2015 07:37 AM |
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2 Replies and 1403 Views
Band Math - Round up cell values 1403 2
Started by Deleted User
Hello,
Is there an operator/function in band math that will allow me to round up to a particular decimal place
The file in question is a Rapideye ToA reflectance image. I'd ideally like to get it to 3 decimal places so eventually I could multiply the image by 1000 (to save disc space).
Any help would be much appreciated.
Many thanks,
James.
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2 |
1403 |
21 Jan 2015 01:37 AM |
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2 Replies and 1313 Views
Missing mouse 1313 2
Started by Deleted User
Hi everyone,
I am running ENVI through parallels on my mac. Previously on Bootcamp, I had no issues. When I open the ROI tool, and place the cursor across the imagery area, the cursor goes missing. The cursor works fine in the other areas of the program such as the menu, etc. And when the ROI tool is not open, the cursor works across the entire screen. Any ideas
Thanks
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1313 |
20 Jan 2015 04:27 PM |
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4 Replies and 1304 Views
ENVI debugging or verbose mode 1304 4
Started by Deleted User
Hi all,
I am going to make an IDL script that automates some tasks in ENVI. One thing that could make my life easier is to see what calculations or functions ENVI is using behind the scenes as I perform operations with Filter Co-Occurence measures. Any tips on this curiosity or task in general would be greatly appreciated.
If this helps, I am doing this under Linux and am starting from the command line. I soon will be using OS X.
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1304 |
20 Jan 2015 12:08 PM |
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1 Replies and 1525 Views
problem with envi_default_stretch_create 1525 1
Started by Deleted User
Hi,
I have problem in displaying results in ENVI. I think this is related to "envi_default_stretch_create". As output i have a matrix of image size. In the matrix values are stored according to the loop size. Suppose the loop is for 1 to 10 then maximum value in loop in 10 and according to condition there are two or only one pixel of value 10. So when i load the band , i am unable to see it. But if i save this file and load it into matlab then there is one pixel with value 10. I trie...
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1525 |
13 Jan 2015 04:03 AM |
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4 Replies and 2791 Views
ENVI 5.1_32 bit windows pack 2791 4
Started by Deleted User
I bought a 32-bit ENVI 5.1 for windows. But I read that 32 bit ones will give advantages in handling data in 64-bit PCs. I have two PCs..one 32 bit...one 64 bit...both Windows OS. How can I install 32 bit ENVI in my 64-bit machine I tried this actually...an error message tells that it needs a 64-bit installer What is this 64-bit installer... How can I do this Thanks.
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4 |
2791 |
13 Jan 2015 01:29 AM |
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3 Replies and 1593 Views
problem in Roi thresholf and false color 1593 3
Started by Deleted User
hello!
in hyperspectral image i Create ROIs from Band Thresholds (choosing a band of0.854) but when i tried to see the statistics of the roi that created there isan error message:
"Array dimensions must be greater than 0". So as i cannot do anything elsewith that ROI
Secondly, how can i shee a false color image in envi 5.2 because through data manager creating multiple files is not supported.
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1593 |
12 Jan 2015 02:51 AM |