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1 Replies and 1268 Views
Shape From shading 1268 1
Started by Deleted User
Hi,
Is there any way to get DEM from a single image (e.g. photoclinometry) using inverse method of the ENVI Shaded Relief procedure
Thank you.
AL.
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1 |
1268 |
12 Oct 2007 05:24 PM |
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1 Replies and 1279 Views
Problem with PC Sharpening of ASTER MX with RadarSAT-1 1279 1
Started by Deleted User
Dear Fellow remote sensors,
Running ENVI 4.3 on WinXP service pack 2
I am currently trying to fuse a RadarSAT-1 image (res 6.25m) to an ASTER MX (res 15m) data set. Essentailly the SAR image is acting like a pseudo panchromatic band where it is used to inject texture and improve the spatial resolution of the ASTER data.
I have used the brovey and HSV approaches with no problems, however, when I attempt to use the PC sharpening approach I run into problems. Following the completion of ...
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1 |
1279 |
11 Oct 2007 01:01 AM |
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0 Replies and 1157 Views
Problem with georegistering image-to-image 1157 0
Started by Deleted User
Hello,
I have two different types of aircraft-collected imagery. The first image is georeferenced, and I would like to use it to georefence the second image, which has no geographical information. I tried selecting ground control points in each image. However, the warped image is black, ie there is nothing in it. What could I be doing wrong Here's the step-by-step procedure that I'm doing,
1) Open up my georegistered JPW file, 20060715_Run25_rgb_1m.jpg, in Display 1 and my ungeoregi...
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0 |
1157 |
04 Oct 2007 01:14 PM |
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0 Replies and 1357 Views
Hants in ENVIIDL 1357 0
Started by Deleted User
Hello:
I need the file developed by Allard De Wit (HANTS-Harmonic Analyses of NDVI Time-Series). If somebody can send it to me. Thank you.
Paulo
pjmurillocenicana.org
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0 |
1357 |
01 Oct 2007 11:04 AM |
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0 Replies and 1379 Views
Hants in ENVIIDL 1379 0
Started by Deleted User
Hello:
I need the file developed by Allard De Wit (HANTS-Harmonic Analyses of NDVI Time-Series). If somebody can send it to me. Thank you.
Paulo
pjmurillocenicana.org
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0 |
1379 |
01 Oct 2007 11:04 AM |
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1 Replies and 1272 Views
IDLDrawWidget ActiveX Control IDL_M_UPRO_UNDEF 1272 1
Started by Deleted User
when is use IDLDrawWidget ActiveX Control in VS2005, there are something wrong with the program. error information:IDL_M_UPRO_UNDEF:Attempt to call undefined procedure/function:'ENVI_IOW'. another error:IDL_M_UPRO_UNDEF:Attempt to call undefined procedure/function:'tiff_write_file_doit_record'.
.I use ENVI_OUTPUT_TO_EXTERNAL_FORMAT to output a GeoTiff image.
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1 |
1272 |
27 Sep 2007 08:02 AM |
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1 Replies and 1035 Views
hyperion_tools.txt, 1035 1
Started by Deleted User
Dear Davin,
With reference to you script titled: hyperion_tools.txt, as your explanation about ''Interpolate Data to Common Wavelength Set'' was not enough and I could not understand it,
Could you please give me some more tips
Best Regards
Ali
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1 |
1035 |
20 Sep 2007 09:20 AM |
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0 Replies and 1129 Views
header file 1129 0
Started by Deleted User
Dear sir/madam:
Thank you for your help! I have a few questions to ask. In the envi-standard header file,what means the header offset I know that ENVI skips these bytes when reading the file. But are these bytes bad datas or the information about something else And what means 'z plot range'and 'data ingore value'Thank you for your consideration!
Michael Green
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0 |
1129 |
18 Sep 2007 08:41 AM |
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0 Replies and 1267 Views
header file 1267 0
Started by Deleted User
Dear sir/madam:
Thank you for your help! I have a few questions to ask. In the envi-standard header file,what means the header offset I know that ENVI skips these bytes when reading the file. But are these bytes bad datas or the information about something else And what means 'z plot range'and 'data ingore value'Thank you for your consideration!
Michael Green
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0 |
1267 |
18 Sep 2007 08:41 AM |
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1 Replies and 1174 Views
header file 1174 1
Started by Deleted User
Dear sir/madam:
Thank you for your help! I have a few questions to ask. In the envi-standard header file,what means the header offset I know that ENVI skips these bytes when reading the file. But are these bytes bad datas or the information about something else And what means 'z plot range'and 'data ingore value'Thank you for your consideration!
Michael Green
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1 |
1174 |
18 Sep 2007 08:41 AM |
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1 Replies and 1176 Views
ROI and number of islands 1176 1
Started by Deleted User
hi,
given a roi_id, how can i get the number of blobs of the region
tanks.
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1 |
1176 |
18 Sep 2007 08:19 AM |
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0 Replies and 1197 Views
Enhancement Technique 1197 0
Started by Deleted User
I have some problem with image enhancement technique.
Please give me what the functions to each image enhancement technique and what the sample they are used for
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0 |
1197 |
17 Sep 2007 02:38 PM |
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0 Replies and 1128 Views
MNF 1128 0
Started by Deleted User
I am new to using this ENVI and do not have any background knowledge of mathematics involved in the process of MNF. Can i completely understand MNF without any knowledge of maths. and can anyone provide answers to the tutorials of ENVI 4.3 in the Cuprite imagery ..which band reflects the best geological features in the effort corrected apparent reflectance data
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0 |
1128 |
17 Sep 2007 02:19 PM |
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0 Replies and 1173 Views
envi support windows server 2003? 1173 0
Started by Deleted User
Hi,
I plan to install envi on one of my computers which is based on windows server 2003. Would there be any problems that I should anticipate
Thanks in advance for any help.
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0 |
1173 |
17 Sep 2007 10:28 AM |
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1 Replies and 882 Views
How to rasterize point data without interpolation? 882 1
Started by Deleted User
I have an ASCII file with several columns, defining X and Y coordinates in the geographic projection and estimated quantities.
I have defined a ROI on an remote sensed image, dumped it to an ASCII file, and processed it with my program, estimating some ground quantities of my interest and saving results to similar file. First two columns, containing coordinates, remain unchanged.
Now I want ENVI to produce a map of these quantities.
The only way I have discovered is Vector -> Rasterize po...
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1 |
882 |
10 Sep 2007 04:19 AM |
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3 Replies and 2325 Views
Adding wavelength data to Landsat GeoTIFFs 2325 3
Started by Deleted User
I'm importing loads of Landsat ETM data as GeoTIFFs. I'm doing PAN sharpening of these, which means depending on the method I use the bands all need to have wavelengths and FWHM assigned. This is easy to do manually, but is impractical when doing it with large volumes of data. Is there a way to automate this Is there a way to tell ENVI you're using Landsat ETM Band 1 and it assigns the correct values
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3 |
2325 |
06 Sep 2007 07:07 AM |
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0 Replies and 1347 Views
'.evf' will line up but '.shp' will not 1347 0
Started by Deleted User
Hello,
I have a vector file (.evf) that will overlay atop my raster image in ENVI just fine. If I export that file as a (.shp), import it into the same project, the (.shp) file will not align correctly. It is off by about 30m or so. The same is true for the (.shp) file in other RS/GIS packages, i.e. it will not align correctly.
Any thoughts on what causes this problem Thanks.
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0 |
1347 |
05 Sep 2007 07:44 AM |
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1 Replies and 1093 Views
Bands DN's 1093 1
Started by Deleted User
I used Spatial Pixel Locator for analysis of DN's of water body in Band 12 of MASTER data. However, I want to save or extract the DN's. Can anyone help how to extract the DN's from any band for analysis. Moreover, how to extract the embedded pixel Lat/Longs in the HDF Data
Regards,
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1 |
1093 |
04 Sep 2007 06:41 AM |
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1 Replies and 1145 Views
start spectral library viewer? 1145 1
Started by Deleted User
Hey Mari (or anyone in the know),
Can you give me one of your nifty undocumented functions to automatically show the spectral library viewer And maybe display a spectrum (if that's a different routine than envi_plot_data....i can do this myself by querying the spectral library file for the spectrum name and then plotting it with envi_plot_data, i just wonder if there's a faster way). I couldn't spot anything with Help, /routines....except i did see an enviobj_spectrum object. I don't think...
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1 |
1145 |
03 Sep 2007 01:33 PM |
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0 Replies and 1109 Views
Orthorectification using resized data 1109 0
Started by Deleted User
I am working on orthorectifying old CORONA satellite images. The original data is a high resolution, and I was able to create a good orthorectification using the digital line camera mode in building the RPCs. However, orthorectifying takes a very long time with this high-res image and I'd like to be able to fiddle more easily. I resized the image (xfac and yfac =0.3) and created new GCPs for this image. Now when I ortho. this lower-res image it is consistenly far off (i.e., many many kms off...
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0 |
1109 |
30 Aug 2007 02:57 PM |