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0 Replies and 1465 Views Excluding clouds  1465  0 Started by  Deleted User Hi... Does any one has a add on module or a process to exclude clouds from images of the same area, and then make a merge or mosaic of the areas that have no clouds
0 1465
28 Apr 2006 05:45 PM
0 Replies and 1552 Views A problem about ENVI_CONVERT_FILE_MAP_PROJECTION routines  1552  0 Started by  Deleted User Hi folks, Now I want to use the ENVI_CONVERT_FILE_MAP_PROJECTION routines in my IDL program. I tried to compile and run the example of this routine in the online help of ENVI. But I always get a error, the error message is 'Keyword parameters not allowed in call. Execution halted at: ENVI_CONVERT_FILE_MAP_PROJECTION '. Could anyone please give me some advice of how to use this routine Thanks your help in advance. Cheers, Wang Zhicheng
0 1552
28 Apr 2006 05:47 AM
0 Replies and 1667 Views ENVI DEM Extraction module with ESA Mars Express Stereo Camera  1667  0 Started by  Deleted User Hello, I hope I can get some help here. I am using the stereo images produced by the European Space Agency probe, Mars Express, currently orbiting around Mars. ESA produce their own 3d data, with a 'Nadir' image draped over the top (they claim not to use ENVI, though, although they do have a support license). The ENVI module claims it needs 'RPC files' (Rational Polynomial Coefficient) to describe the camera model before DEM extraction can take place. ESA support have yet to ...
0 1667
27 Apr 2006 08:34 AM
0 Replies and 1521 Views Clearing memory in batch processing  1521  0 Started by  Deleted User How do i clear all files in the memory, whiel batch processing thanks, Jeyam.
0 1521
26 Apr 2006 12:50 PM
0 Replies and 1454 Views Subseting an Image to the shape of a Polygon ( ROI or Shpfile)  1454  0 Started by  Deleted User Hi Forumer, Can you please suggest me, How I can subset ( clip) an image to the the shape of polygon ( not rectangle) uisng ENVi or IDL. I tried using ROI and other methods given in the Help, but it always clips to a rectangle. I need to subset the iamge exactly to the shape of the polygon. ( lfor example shape of UAE country ). This can be done easly using ERDAS, ArcGRID and in simple software like GlobalMapper. but I could'nt figure it out in ENVI. Is there a way
0 1454
26 Apr 2006 05:56 AM
2 Replies and 1423 Views Use of ENVI_OPEN_FILE no_realize option  1423  2 Started by  Deleted User Hi, I wrote some codes to transfer an image file to grid. I used the no_realize option in the envi_open_file. The code compiled ok but when it runs, envi gave me the error: ENVI_OPEN_FILE: Incorrect number of arguments. My code is like follows: ; Open the input file in ENVI envi_open_file, infiles, no_realize, r_fid=fid ; Gracefully exit if the user picked a bogus file if (fid eq -1) then return ;Query the number of samples, lines, and bands in the file envi_file_query, fid, ns=ns,...
2 1423
24 Apr 2006 03:57 AM
0 Replies and 1757 Views Projection of SIN (MODIS Land product)  1757  0 Started by  Deleted User MODIS Land products are projected as SIN (Sinusoidal grid), and NASA provides MRT (Modis Reprojection Tool) for converting SIN to various projections. I have two questions. 1) When opening MOD land product file, I realized that ENVI doesn't recognize SIN projection because 'Proj : Arbitrary (Pixel Based), Datum: ' was appeared. Is there any way to recognize SIN projection in ENVI 2) If there is any way, does ENVI provide the conversion tool from SIN to other projections (e.g. TM, UTM) ...
0 1757
21 Apr 2006 03:38 AM
0 Replies and 1387 Views How to open two georeference image in one display?  1387  0 Started by  Deleted User Hello forumer.. Any idea how to open two difference image in one display Are ENVi have this capability
0 1387
05 Apr 2006 08:41 PM
0 Replies and 1596 Views MINIMUM NOISE FRACTION  1596  0 Started by  Deleted User I am trying to apply the MNF algorithm on MERIS L1B (no spectral subsetting). In the FORWARD TRANSFORM DIALOGUE box, I use SHIFT DIFF SUBSET button and isolate a region of pure pixels. I OK everything subsequently and try to run the MNF function. However I immediately get an error message which goes like this: mnf_doit: An error has occurred during processing Error: 'Out of range subscript encountered: SPECTRA.' I tried the process again without subsetting from the SHIFT DIFF SUBSET and ...
0 1596
05 Apr 2006 01:05 AM
0 Replies and 1556 Views size of the image you work on  1556  0 Started by  Deleted User if i don't want to work on the all image but only on a specific part of it, how can i resize the image
0 1556
04 Apr 2006 03:11 AM
0 Replies and 1401 Views SIR-C ceos format  1401  0 Started by  Deleted User Hi all, i have SIR-C data in CEOS format in a disc. Can anyone please let me know how to open it in ENVI.ENVI offers options to open ceos format from tapes.I have my data in a disc. Thanking You, Yours sincerely, Indumathi.J
0 1401
31 Mar 2006 02:03 PM
0 Replies and 1559 Views anyone attending Hyperpsectral conf at SPIE's Defense & Security Symposium in Orlando  1559  0 Started by  Deleted User there is a hyperspectral technical conference (for fee) and a free hyperpsectral special session with Dr. Alex Goetz. April 20 (Orlando) wondering if anyone is going and we could hook up, talk about applications, etc. peterhspie.org
0 1559
31 Mar 2006 01:38 PM
0 Replies and 1483 Views how to export elevation file from ENVI 4.2 to Erdas imagin or Arcgis  1483  0 Started by  Deleted User I used the steps in ENVI 4.2 to extract the DEM. After last step I don't now how to load the DEM file and how to categorize the elevations in the mean different colors. I wanted to export the elevation file to Erdas or Arcgis to use it, but I faild to do. Does any one know how to solve these problems, especially to export the elevation file
0 1483
29 Mar 2006 02:20 PM
0 Replies and 1622 Views Speckle (adaptive) filtering - what image input?  1622  0 Started by  Deleted User Hello, When I want to use an adaptive filter to reduce speckle from my SAR imagery, should I input an amplitude or power image What I did do was input an amplitude image and ran an enhanced lee filter. My result was an image with a 'sprinkling' of Nan's. Is anyone familiar with this I do believe, theoretically, I implemented the correct cutoff values on the filter (and I held the damping factor to 1). RS
0 1622
21 Mar 2006 09:05 AM
0 Replies and 1536 Views PCA interpretation report  1536  0 Started by  Deleted User We did a PCA on hyperspectral data (126 bands) this to identify the wavelengths (every band was characterized by a wavelength group) that are useful for further analysis. The report gives us an eigenvector table in which is difficult to interpret. Both rows and columns have the same labels (band *), so we do not know in which direction to interpret the table: are the eigenvector valus associated with a same PC placed in a colum or in a row Thanks for your help!!!! Jan
0 1536
16 Mar 2006 04:53 AM
0 Replies and 1657 Views 3D surface, programatically  1657  0 Started by  Deleted User Anyone know how what main command(s) to use to recreate the ENVI menu feature '3D surface view' I'm trying to do some landscape position modeling and need to examine many attempts, so I'm getting tired of re-entering a lot of parameters each time. My goal is a function that would save/read settings from one 3d-viewing to the next, including the use of a spatial subsetting based on the display window... so one click and I've got my next 3D view. Thanks, -Eric
0 1657
14 Mar 2006 03:11 PM
1 Replies and 1547 Views vegetation indices in EMVI 4.2  1547  1 Started by  Deleted User I am interested to know how exactly indices as Red Edge Position Index are calculated. This index refers to the steepest slope within the range 690 nm to 740 nm. Is there a way to see the source code to check the calculation Another question is how ENVI the bands select. Having CHRIS data the Vegetation Index calculator calculated the Structure Insensitive Pigment Index,which included the wavelength of 800 nm. However, I dont have a band at that wavelength available. So, on what logic took th...
1 1547
14 Mar 2006 02:23 PM
1 Replies and 1962 Views Importing IMAGINE .ige files into ENVI  1962  1 Started by  Deleted User Greetings all: I am attempting to import an IMAGINE .IGE file into ENVI 4.2. Thusfar, I have been unable to correctly do so. I have tried importing/selecting the .IGE file, with and without the accompanying .IMG file, to no avail. Has anyone experienced this problem Is there something I am missing here Any help would be greatly appreciated. Sincerely, Christopher Cole
1 1962
09 Mar 2006 05:06 AM
0 Replies and 1347 Views Customize ENVI  1347  0 Started by  Deleted User How to customise ENVI's menugui Anybody out there have information to sharing with ENVI's forumer
0 1347
08 Mar 2006 10:45 PM
0 Replies and 1608 Views Feature extraction  1608  0 Started by  Deleted User Hello forumer.. any idea how to extract plant canopy What process or method should be done thanks..
0 1608
07 Mar 2006 08:06 PM
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