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0 Replies and 1445 Views
how to read SIR-C tar files 1445 0
Started by Deleted User
Hi,
I found that USGS is distributing now SIR-C MLC images trough ftp (tar files). Is it any way arround to read such data to ENVI I think that the proper way it should be troug tape utilities but I have no clue how to force ENVI to read tar file instead of tape device. Does anybody faced with this problem already And/or maybe is aother way arround
Any suggestions
Thanks in advance!
Zbigniew
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1445 |
13 Jul 2006 09:10 AM |
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0 Replies and 1557 Views
Multilook SIR-C data! 1557 0
Started by Deleted User
Hi there,
I've been trying to multilook both single-look and multi-look complex SIR-C data with ENVI with no success. The problem appears when I wish to synthesize the .cdp file generated by the multi-look process. Although the number of rows and columns changes, the header of the new multilooked file is exactly the same as the original one. Does anybody know what happens with especially the offset as well as with the nr. rows and columns of the image when it is multilooked Any help will be...
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1557 |
28 Jun 2006 01:18 PM |
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0 Replies and 1670 Views
Using ENVI_SELECT in compiled idl program 1670 0
Started by Deleted User
Dear all,
I created a program in which several ENVI routines are being used. It works fine as long as the source code has not been compiled. When I compile the program and call the .sav routine on another machine, it crashes when I select a file. Files are being selected using ENVI_SELECT. The failure message is the following:
Variable is undefined: E_INVISIBLE_FLAG (ENVI_GLOBALS1_COMMON).
Execution halted at: ENVI_ENTER_FILE
ENVI_OPEN_FILE
...
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1670 |
12 Jun 2006 11:33 AM |
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0 Replies and 1782 Views
MNF-transform field spectra 1782 0
Started by Deleted User
have some field spectra that was collected with a ASD field spectrometer. I want to be able to use this data as endmembers for classifying a Hymap image. Problem is the Hymap is MNF-transformed, and the field spec is in reflectance. Its easy to transform an image, but I cant figure out how to MNF-transform a spectral library signature. Anybody have any ideas for this - CHarlie F
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1782 |
12 Jun 2006 05:06 AM |
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0 Replies and 1629 Views
ndvi 1629 0
Started by Deleted User
Hello,
I am trying to compute the ndvi of a landsat picture dataset by using ENVI 3.5
i am using band 4 and 3 by using the bandmath tool in the envi menu but it seems the result is not correct to me (i have compared with ER MAPPER results),
i maybe forget to do something while i am loading the bands
someone could help me
I thank you very much,
nicolas
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0 |
1629 |
09 Jun 2006 05:06 AM |
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0 Replies and 1560 Views
Changing Class code 1560 0
Started by Deleted User
Hi
I have a classified file with few classes. Each class has a code- Is it possible to change the class code (for example from class code 2 to 4...).
Thanks
Gil
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0 |
1560 |
06 Jun 2006 08:15 AM |
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0 Replies and 1657 Views
Command line saving of metafiles? 1657 0
Started by Deleted User
I'm trying to hunt down the IDL code to save a set of files as an envi metafile -- any ideas on how I do this
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0 |
1657 |
05 Jun 2006 07:49 PM |
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2 Replies and 1929 Views
Image enhancement techniques 1929 2
Started by Deleted User
Greetings!
I am currently looking into the various image enhancement tools available in ENVI and would appreciate if someone can give me guidance.
I have a set of satellite images and there are some situations where I need to perform enhancement. They are:
1. Areas that are covered by cloud shadows and need to be dodged to bring out the features
2. Areas that are over-exposed and need to be 'darkened'
3. Adjacent images in which one is taken on a 'misty' day while the other is tak...
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2 |
1929 |
04 Jun 2006 09:53 PM |
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0 Replies and 1637 Views
import text layer from mapinfo 2 envi 1637 0
Started by Deleted User
i want to import layrs with text from mapinfo table to envi. to superposed this text, wich are the toponimy, to an image
thank's
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1637 |
29 May 2006 08:47 AM |
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0 Replies and 1691 Views
importer du text à partir d'une table mapinfo 1691 0
Started by Deleted User
salut
je veut importer une table mapinfo de toponimie sur ENVI càd une couche ou se trouve du text mai je ne peu po le faire mai pour les vecteur càd les ligne ya po de pb
j'aimerai bien ke j'aurai la répense sur mon émail
et merci
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0 |
1691 |
29 May 2006 07:33 AM |
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0 Replies and 1669 Views
help for stitching SRTM images together 1669 0
Started by Deleted User
I m working on SRTM tiles and I m trying to stitch 6 of them together. Therefore I m using the Mosaicking option in Envi. The problem is that I just arrive to stitch 2 georefernced tiles together (1401x1201 pixels)and not all the 6 of them (2401x3601 Pixels). It s possible for me to stitch them together in the pixelbased mode but I need the georeferenced mosaicking. Maybe there is just a parameter to change, but whichHow can I do
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0 |
1669 |
26 May 2006 07:43 AM |
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2 Replies and 1832 Views
help for stitching SRTM images together 1832 2
Started by Deleted User
I m working on SRTM tiles and I m trying to stitch 6 of them together. Therefore I m using the Mosaicking option in Envi. The problem is that I just arrive to stitch 2 georefernced tiles together (2401x1201 pixels)and not all the 6 of them (2401x3601 Pixels). It s possible for me to stitch them together in the pixelbased mode but I need the georeferenced mosaicking. Maybe there is just a parameter to change, but whichHow can I do
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2 |
1832 |
26 May 2006 07:43 AM |
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0 Replies and 1705 Views
Supervised classification 1705 0
Started by Deleted User
Can I apply the rules learned from the ROIs in one image to different images
How can this be done
Thanks a lot.
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1705 |
25 May 2006 06:10 PM |
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0 Replies and 1665 Views
Spilt Images 1665 0
Started by Deleted User
I have a image from a state and i want to split this image in other ones delimited buy the boundaries of the counties. It is possible in ENVI
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1665 |
22 May 2006 12:06 PM |
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1 Replies and 1949 Views
Bad Line Correction 1949 1
Started by Deleted User
Dear Friends,
I have a pushbroom hyperspectral imaging system, which scans from 1000 to 1800 nm. The camera is equipped with an InGaS detector array of size 320 x 243 (spatial x spectral); and it has about 2 bad pixels. So, in the hyperspectral image, for each bad pixel, I am getting a bad line. The location of bad line varies from one band to the other and some of them are visible only at particular band.
I tried to run PCA. But it couldn't get through because the image had -NaN valu...
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1949 |
22 May 2006 11:35 AM |
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0 Replies and 1606 Views
ROC Curve analysis 1606 0
Started by Deleted User
Hello
Before I classify my hyperspectral image i pull up my training ROIs and reconcile them to the original image and then perform max likelihood classification after that I pull up my testing ROIs and reconcile them to my classified image and then I go to post classification (ROC CURVES) but for some reason it wont bring up my testing files in add the combination
( my input parameters are input file is selected as the original image and the ground truth img is the classified image as it wont...
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1606 |
11 May 2006 10:50 AM |
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0 Replies and 1894 Views
rotate/transpose the hyperspectral image 1894 0
Started by Deleted User
Hi group:
I have a hyperspecttal image (x,y,l). I want to transpose this 3D matrix such that the resulting image is (x, l, y). That is, one spatial axis became spectral axis and vice versa. How can I do this in ENVI or IDL Thanks in advance.
Jeyam.
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0 |
1894 |
08 May 2006 09:09 AM |
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0 Replies and 1782 Views
questions about segmentation theory 1782 0
Started by Deleted User
hello
i need some explains about 'segmentation image' from 'basic tools' menu
1. i was looking at help and meet 'DN value'. What is this
2. does i need make segmentation before classification or after classification
why segmentation included in 'post classification' menu
thanks at advance
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0 |
1782 |
05 May 2006 11:53 AM |
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0 Replies and 1661 Views
Using ENVI for Hyperion corrections 1661 0
Started by Deleted User
Hi,
I'm trying to correct a few Hyperion images from Radiance to Reflectance. I'm using ENVI 4.2 and FLAASH. I've read a few hands-on processing instructions that i got from the internet, but none seem to give me accurate results. Anybody know if there is a full processing outline for Hyperion processing with ENVI out there
thanks
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1661 |
05 May 2006 09:54 AM |
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0 Replies and 1754 Views
Tree Counting 1754 0
Started by Deleted User
Any possible way to do tree counting technique or any commercial tools that can i purchase for it
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0 |
1754 |
28 Apr 2006 06:32 PM |