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0 Replies and 2552 Views
loking laser induthion of sale 2552 0
Started by Deleted User
over posibility connetion for selestar .......only frequency noise and position tank
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0 |
2552 |
15 Feb 2004 05:54 PM |
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0 Replies and 2566 Views
vector overlays 2566 0
Started by Deleted User
Hi, I am a new user of ENVI... I am trying to put vector layers on top of a DEM image, but the vectors wouldn't show up. Does anyone have any idea where the problem is (I checked the projection)
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0 |
2566 |
11 Feb 2004 12:17 PM |
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0 Replies and 2370 Views
about ASTER 2370 0
Started by Deleted User
hello everyone:
I use the ENVI 4.0and IDL 6.0,but
1.when I want to use the IDL6.0-import hdf file to open the ASTER file,it can not open it .why is itis not the hdf or hdfeos.but I can open it using the hdf explorer.or it's name is not correctthe name is pg-PR1B0000-2002042902_029_001.it is ASTER 1B.
2.if I write the program in c,can I link it to IDL6.0
if someone know this,please help me.thank you!
hqh20000263.net
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0 |
2370 |
11 Feb 2004 12:59 AM |
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0 Replies and 2344 Views
ERS SLC 2344 0
Started by Deleted User
Does any one know how to import SLC image data into ENVI. Efforts so far produce very noisey images
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0 |
2344 |
05 Feb 2004 07:53 AM |
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0 Replies and 2264 Views
Georegistering a map 2264 0
Started by Deleted User
I have a map that I wish to georegister. I was wanting to input the four corner geographics as control and warp the map to these values.
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0 |
2264 |
03 Feb 2004 11:48 AM |
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0 Replies and 2222 Views
non-linear spectral unmixing 2222 0
Started by Deleted User
hi guys,
i'm looking for programs, or algorithms for non-linear spectral unmixing. do you know of any
cheers,
Tal
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0 |
2222 |
30 Dec 2003 07:19 AM |
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1 Replies and 2315 Views
Combining thematic layers 2315 1
Started by Deleted User
Hello All,
I want to combine set of classifed images into a single image.
For eg: If image1 class is 'A' AND image2 class is 'B' then output image class is 'C'.
I looked at band math but I guess another approach is neccesary for combining classified images.
Any help is appreciated.
Regards,
Sitansu
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1 |
2315 |
06 Nov 2003 09:19 AM |
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4 Replies and 4115 Views
ROI SEPARABILITY 4115 4
Started by Deleted User
I get the error message:'Singular value encountered in calculation for ROI '. If I subset for bands 1-10 or 10-20 I get right results, but if I subset for 1-20 the error message is displayed and results are all 0.
Why HELP doesn't give algorithm constraits to be able to performe separability
Does anyone have advice
Thanks in advance
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4 |
4115 |
09 Oct 2003 10:05 AM |
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0 Replies and 2371 Views
Data Cube 2371 0
Started by Deleted User
I am trying to create a data cube for hyperspectral image but I couldnt find an option in ENVI, If anybody knows could you please let me know too.
Thanks
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0 |
2371 |
08 Oct 2003 08:19 AM |
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1 Replies and 2610 Views
Calibration of the values shown in images to get the reflectancy 2610 1
Started by Deleted User
I'm processing AVHRR raw files with a programm written in IDL, to correct the values because of the influence of solar and sensor zenith angles, but the values of the raw and the corrected images range between 70 and over 500. How can I get them either to values in percent (up to max 100) or in a fraction of reflectancy(range between 0 and 1)
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1 |
2610 |
25 Sep 2003 02:52 AM |
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0 Replies and 2462 Views
Importing ASCII ROIs for image creation 2462 0
Started by Deleted User
Dear ENVIans,
The 'Output ROIs to ASCII' command format files in the following manner:
;ENVI Output of ROIs (3.4) &91Mon Apr 17 17:00:26 2000&93
...
; ID X Y B1 B2 B3
1 12 14 255 0 124
2 13 28 153 100
...
where X and Y are sample and line numbers, and B1, B2, b3 give the DN corresponding to some spectral band.
I have already Outputted ROIs data to ASCII. Now I would like to re-import my data and create an image corresponding to a particular field.
Is there a build-in...
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0 |
2462 |
16 Sep 2003 01:22 PM |
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0 Replies and 2463 Views
Creating a class for an image without roi 2463 0
Started by Deleted User
Hello
How can I create a class without a region of interest. In this case, I have a 2D array that is a subset of an image that I would like to turn into a class.
Thanks for your time,
Afsheen Khan
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0 |
2463 |
16 Sep 2003 09:57 AM |
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0 Replies and 2389 Views
Creating a Transparency over a gray scale image 2389 0
Started by Deleted User
Hello
I would like to use as many envi functions as possible to accomplish the following, but if needed, I can also do some stuff in IDL.
What I would like to do is create something like a transparency to overlay on a gray scale image. The transparency will be made up of red pixels that correspond to the original gray scale image. I can do this using the 8 color scheme and changing the color table, but I want to find a way to do this using the True color scheme.
Thanks for your time,
...
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0 |
2389 |
16 Sep 2003 09:56 AM |
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0 Replies and 3224 Views
ROI separability error 3224 0
Started by Deleted User
I have a list of ROIs (50) and want to compare subsets for their spectral separability. Whether I compare 2 ROIs or 20, I get an error, and the results only show '0' or NaN. This is the error message:
Singular value encountered in calculation for ROI .
I haven't been able to run 'Compare ROI separability' successfully.
Does anyone have advice
Thanks in advance...
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0 |
3224 |
08 Sep 2003 08:57 AM |
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0 Replies and 2445 Views
warping avhrr data 2445 0
Started by Deleted User
I am trying to use batch processing to warp avhrr imagery, however I have strange result (shifted in x) If I do the warp interactively everything is ok but if I use the batch processing something is wrong! I used the samples projections definitions and adding a new one and always is the same differences between batch and interactive.
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0 |
2445 |
26 Aug 2003 12:09 PM |
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2 Replies and 2172 Views
Landsat TM calibration 2172 2
Started by Deleted User
when I use the calibration function for Landsat TM, it said the gain and offset could't be found. But the gain and offset are in the header file. So what's wrong with it BTW, I am using the .hdr file. Thanks!
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2 |
2172 |
06 Aug 2003 10:01 AM |
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0 Replies and 2259 Views
mosaic template: inserting new bands/images 2259 0
Started by Deleted User
Is there a way to insert new bands/images into an existing mosaic template's individual image positions (i.e. use it as a REAL template) in an interactive manner. I would like to do it without editing the actual text file/script.
An older manual (Envi 3.4) alluded to being able to do this, but its directions aren't applicable AND the current version 3.6 has nothing about it.
Thanks,
Orest
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0 |
2259 |
01 Aug 2003 11:17 AM |
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0 Replies and 2516 Views
Digital Orthophoto Quadrangle Data 2516 0
Started by Deleted User
I have DOQ images. I cannot open these files. does anybody know how to lunch this files from ENVI . There is an option but whenever I opened that option the images appear bullury and corrupted.
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0 |
2516 |
17 Jul 2003 12:56 PM |
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0 Replies and 3040 Views
Subset RIOs by 'Resize(spatial/spectral)' vs. 'Subset Data via ROI 3040 0
Started by Deleted User
I have just started using ENVI and will be analyzing radar data with its PCA algorithm.
What is the difference between subsetting an image using ROIs using:
a) Resize(spatial/spectral) command on the Basic Tools menu and
b) Subset Data via ROIs command on the same menu.
The two methods seem to be identical except the latter command (b) also allows you to mask the pixels outside the ROI but in the bounding box. When not using the mask in (b) the results seem to be identical to the for...
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0 |
3040 |
11 Jul 2003 12:16 PM |
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1 Replies and 2704 Views
mosaicking georeferenced ASTER data 2704 1
Started by Deleted User
I would like to mosaic several georeferenced ASTER images (level 1A/B as well as DEMs), but I keep receiving an error that states that ENVI is 'unable to mosaic georeferenced images containing a rotation factor other than zero'. What are my options to correct this problem, while still maintaining the georeferencing information in the data
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1 |
2704 |
01 Jul 2003 01:09 PM |