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1 Replies and 1128 Views Launching ROI tool from script  1128  1 Started by  Deleted User I have written a program that creates rois (using envi_create_roi) that I may (or may not) want to display in my image group. However these rois do not display without me remembering to have the roi tool already open (which I sometimes forget to launch because I use this program somewhat infrequently). Anyway, is there a way that I can automatically open and close the roi tool for a display group from a script
1 1128
27 Aug 2007 10:03 AM
1 Replies and 1584 Views Principal Components analysis/factor loadings  1584  1 Started by  Deleted User Hi there-- I'm learning my way around ENVI (and remote sensing in general)... I've run a PCA analysis on all 12 bands of an ASTER image. I'm trying to figure out how to interpret the stats file--I get a covariance matrix, a correlation matrix, eigenvalues, and the other data I expect to find. However, in all the matrices, both the rows and the columns are labeled Band 1-12. I can't tell which one pertains to the original bands, and which pertains to the PC's. Usually, I see cell he...
1 1584
21 Aug 2007 03:32 PM
1 Replies and 1263 Views Sensor line in building RPCs  1263  1 Started by  Deleted User In the ENVI help for 'Building RPCs', the diagram for the line central projection method shows the flight direction perpendicular to the scan lines. By selected X or Y for the 'Sensor line along axis' option, can you make the program work with a flight line that is parallel to the scan line (as for CORONA satellite images) Or does the program always assume the flight line and scan lines are perpendicular
1 1263
21 Aug 2007 11:05 AM
1 Replies and 1168 Views Vegetation Analysis/Vegetation Index Calculator  1168  1 Started by  Deleted User I am a new ENVI user. I have used the NDVI and Tasseled Cap vegetation indices that are built into the ENVI program on my images and everything worked fine. I want to use a few more, but when I tried using the vegetation index calculator on my images an error message kept coming up. The error message says 'wavelengths must be defined to calculate vegetation indices.' I am not sure what I am supposed to do to get the vegetation index calculator to work.
1 1168
20 Aug 2007 08:31 PM
1 Replies and 1157 Views Histograms and Supervised Classifications  1157  1 Started by  Deleted User Hi--I'm new to ENVI--using it in an archaeological context. Here's my question--I have some ROI's defined for a river delta. I also have a survey area that takes up a small part of the river delta--but since the survey area is unexplored, there are no ROI's from that area. I tried using an Endmember classification with some interesting results. The endmember spectra were just imported from the ROI's for the original image. But can I do this, or do I need to match the historgrams first Wil...
1 1157
20 Aug 2007 03:50 PM
0 Replies and 1227 Views The definition of the envi-standard header file  1227  0 Started by  Deleted User Dear sir/madam: My name is Michal. I have a question to ask! How can I get the definition of the envi-standard header file for reading the data£¿Just like a document to help me to know that the significance that parameter represent! Please help me .I will very appreciate it if I can gain your reply as soon as possible! yours truely Michal Gr...
0 1227
17 Aug 2007 11:49 PM
1 Replies and 1195 Views Convert Map Projection Error - Rigorous  1195  1 Started by  Deleted User I'm trying to convert a map projection of a very large (i.e., 61000 by 17000 pixels) image using ENVI 4.3's 'Rigorous' conversion parameter. I get an error when trying to convert the full image but not when I do a smaller subset. The error is: 'array dimensions must be greater than 0.'. Any thoughts or suggestions Thanks
1 1195
17 Aug 2007 08:30 PM
0 Replies and 1103 Views empirical line  1103  0 Started by  Deleted User Hi Everybody, I am trying to get reflectance value from Aster L1B data (VNIR ans SWIR bands). I wanted to use empirical line method from ENVI 4.3. I tried to process but at the end of the process I lost my band 9. At beginning I have 9 bands after application my band 9 become completly dark. Do you know what is the reason of this thank you, Filiz
0 1103
16 Aug 2007 08:40 AM
1 Replies and 1512 Views empirical line  1512  1 Started by  Deleted User Hi Everybody, I am trying to get reflectance value from Aster L1B data (VNIR ans SWIR bands). I wanted to use empirical line method from ENVI 4.3. I tried to process but at the end of the process I lost my band 9. At beginning I have 9 bands after application my band 9 become completly dark. Do you know what is the reason of this thank you, Filiz
1 1512
16 Aug 2007 08:40 AM
0 Replies and 1099 Views The definition of the envi-standard images  1099  0 Started by  Deleted User Dear sir/madam: My name is Michal. I have a question to ask! How can I get the definition of the envi-standard images for reading the data£¿Just like a document to help me to know that the significance that data represent! Please help me .I will very appreciate it if I can gain your reply as soon as possible!
0 1099
15 Aug 2007 08:30 PM
0 Replies and 1184 Views Altering multiple ROIs  1184  0 Started by  Deleted User Hi Anyone know how I can change the details of multple ROI's at the same time I want to change the name and colour of multiple ROI's at the same time to the same vasue. It would be great to be able to change them in a text editor, or to import from a text file to multiple ROIs. Cheers.
0 1184
14 Aug 2007 05:22 PM
2 Replies and 1096 Views Altering multiple ROIs  1096  2 Started by  Deleted User Hi Anyone know how I can change the details of multple ROI's at the same time I want to change the name and colour of multiple ROI's at the same time to the same vasue. It would be great to be able to change them in a text editor, or to import from a text file to multiple ROIs. Cheers.
2 1096
14 Aug 2007 05:22 PM
0 Replies and 1160 Views estimate SNR?  1160  0 Started by  Deleted User Hi folks, I've seen papers where the SNR for a scene has been estimated for a scene using the data itself. These papers have brief discussions of how they did it, but it didn't quite make sense to me. Can anyone give a fairly complete outline of how this is done Jeff
0 1160
09 Aug 2007 02:07 PM
0 Replies and 1052 Views without cloudy  1052  0 Started by  Deleted User If somebody knows how to elimanate image's cloudy.
0 1052
06 Aug 2007 08:49 AM
1 Replies and 1385 Views ENVI Spectral Math Question  1385  1 Started by  Deleted User Is there a way to subtract a spectrum from every pixel in an image simultaneously The ENVI spectral math help only seems to address it on a pixel-by-pixel basis, and I need to subtract the Martian dust spectrum from an entire image.
1 1385
06 Aug 2007 07:35 AM
1 Replies and 1408 Views Read/write associated DEM file name?  1408  1 Started by  Deleted User So am I missing something, or can you not programmatically read or write the name of an associated DEM (the 'dem file' and 'dem band' settings) to a header file If this isn't possible, any chance of getting it into ENVI 4.4 Jeff
1 1408
01 Aug 2007 01:51 PM
2 Replies and 1363 Views Adding tiling to an ENVI/IDL program - smoothing/averaging HSI data  1363  2 Started by  Deleted User I have code for IDL to smooth hyperspectral data by utilizing a moving average. I need to add a function to tile the information, because I am currently limited to what memory my computer has available (which isn't much). Alternatively, are there any modules in ENVI that can average spectra, because I have used the spatial smoothing functions, but perhaps there is a way to apply this to the spectral data I've included my code below. Thanks! ============================================...
2 1363
30 Jul 2007 08:34 AM
1 Replies and 1603 Views Cannot install ENVI 4.3 on Ubuntu Linux 7.04 (x86_64)  1603  1 Started by  Deleted User Hi, I'm having difficulty installing ENVI on Ubuntu 7.04 (x86_64). I can run the installer, accept the license, and choose the options to install, and get past the installation summary. After that, I get an immediate error: /usr/local/rsi/idl_6.3/bin/post_unpack was not found. There may be errors setting up the product environment. This is followed by a number of other errors stating that various scripts were not found or files were not found so no links were created. /usr/loca...
1 1603
26 Jul 2007 01:15 AM
0 Replies and 1275 Views Importing OMEGA data into ENVI  1275  0 Started by  Deleted User Does anyone know how to import OMEGA (from Mars Express) data into ENVI to overlay it on a MOLA basemap Thanks, ~Tanya
0 1275
25 Jul 2007 08:32 AM
1 Replies and 1223 Views ENVI on windows vista  1223  1 Started by  Deleted User Hi listers, Does anyone knows if envi works on windows vista Andrew
1 1223
24 Jul 2007 10:40 AM
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Page 118 of 137 << < 116117118119120 > >>