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1 Replies and 1294 Views Shape From shading  1294  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.
1 1294
12 Oct 2007 05:24 PM
1 Replies and 1296 Views Problem with PC Sharpening of ASTER MX with RadarSAT-1  1296  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 ...
1 1296
11 Oct 2007 01:01 AM
0 Replies and 1169 Views Problem with georegistering image-to-image  1169  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...
0 1169
04 Oct 2007 01:14 PM
0 Replies and 1371 Views Hants in ENVIIDL  1371  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
0 1371
01 Oct 2007 11:04 AM
0 Replies and 1400 Views Hants in ENVIIDL  1400  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
0 1400
01 Oct 2007 11:04 AM
1 Replies and 1289 Views IDLDrawWidget ActiveX Control IDL_M_UPRO_UNDEF  1289  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.
1 1289
27 Sep 2007 08:02 AM
1 Replies and 1044 Views hyperion_tools.txt,  1044  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
1 1044
20 Sep 2007 09:20 AM
0 Replies and 1142 Views header file  1142  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
0 1142
18 Sep 2007 08:41 AM
0 Replies and 1276 Views header file  1276  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
0 1276
18 Sep 2007 08:41 AM
1 Replies and 1189 Views header file  1189  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
1 1189
18 Sep 2007 08:41 AM
1 Replies and 1188 Views ROI and number of islands  1188  1 Started by  Deleted User hi, given a roi_id, how can i get the number of blobs of the region tanks.
1 1188
18 Sep 2007 08:19 AM
0 Replies and 1210 Views Enhancement Technique  1210  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
0 1210
17 Sep 2007 02:38 PM
0 Replies and 1140 Views MNF  1140  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
0 1140
17 Sep 2007 02:19 PM
0 Replies and 1187 Views envi support windows server 2003?  1187  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.
0 1187
17 Sep 2007 10:28 AM
1 Replies and 897 Views How to rasterize point data without interpolation?  897  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...
1 897
10 Sep 2007 04:19 AM
3 Replies and 2348 Views Adding wavelength data to Landsat GeoTIFFs  2348  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
3 2348
06 Sep 2007 07:07 AM
0 Replies and 1362 Views '.evf' will line up but '.shp' will not  1362  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.
0 1362
05 Sep 2007 07:44 AM
1 Replies and 1107 Views Bands DN's  1107  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,
1 1107
04 Sep 2007 06:41 AM
1 Replies and 1159 Views start spectral library viewer?  1159  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...
1 1159
03 Sep 2007 01:33 PM
0 Replies and 1127 Views Orthorectification using resized data  1127  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...
0 1127
30 Aug 2007 02:57 PM
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Page 117 of 137 << < 115116117118119 > >>