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0 Replies and 1482 Views
Excluding clouds 1482 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
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1482 |
28 Apr 2006 05:45 PM |
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0 Replies and 1567 Views
A problem about ENVI_CONVERT_FILE_MAP_PROJECTION routines 1567 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
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1567 |
28 Apr 2006 05:47 AM |
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0 Replies and 1685 Views
ENVI DEM Extraction module with ESA Mars Express Stereo Camera 1685 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 ...
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1685 |
27 Apr 2006 08:34 AM |
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1535 |
26 Apr 2006 12:50 PM |
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0 Replies and 1468 Views
Subseting an Image to the shape of a Polygon ( ROI or Shpfile) 1468 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
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1468 |
26 Apr 2006 05:56 AM |
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2 Replies and 1449 Views
Use of ENVI_OPEN_FILE no_realize option 1449 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,...
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2 |
1449 |
24 Apr 2006 03:57 AM |
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0 Replies and 1774 Views
Projection of SIN (MODIS Land product) 1774 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)
...
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1774 |
21 Apr 2006 03:38 AM |
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1401 |
05 Apr 2006 08:41 PM |
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0 Replies and 1617 Views
MINIMUM NOISE FRACTION 1617 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 ...
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1617 |
05 Apr 2006 01:05 AM |
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0 Replies and 1568 Views
size of the image you work on 1568 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
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1568 |
04 Apr 2006 03:11 AM |
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0 Replies and 1426 Views
SIR-C ceos format 1426 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
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1426 |
31 Mar 2006 02:03 PM |
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1580 |
31 Mar 2006 01:38 PM |
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0 Replies and 1502 Views
how to export elevation file from ENVI 4.2 to Erdas imagin or Arcgis 1502 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
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1502 |
29 Mar 2006 02:20 PM |
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0 Replies and 1646 Views
Speckle (adaptive) filtering - what image input? 1646 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
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1646 |
21 Mar 2006 09:05 AM |
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0 Replies and 1559 Views
PCA interpretation report 1559 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
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1559 |
16 Mar 2006 04:53 AM |
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0 Replies and 1683 Views
3D surface, programatically 1683 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
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1683 |
14 Mar 2006 03:11 PM |
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1 Replies and 1571 Views
vegetation indices in EMVI 4.2 1571 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...
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1571 |
14 Mar 2006 02:23 PM |
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1 Replies and 1992 Views
Importing IMAGINE .ige files into ENVI 1992 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
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1 |
1992 |
09 Mar 2006 05:06 AM |
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0 Replies and 1365 Views
Customize ENVI 1365 0
Started by Deleted User
How to customise ENVI's menugui Anybody out there have information to sharing with ENVI's forumer
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1365 |
08 Mar 2006 10:45 PM |
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0 Replies and 1636 Views
Feature extraction 1636 0
Started by Deleted User
Hello forumer.. any idea how to extract plant canopy What process or method should be done
thanks..
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1636 |
07 Mar 2006 08:06 PM |