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0 Replies and 1142 Views New IDL Product Manager  1142  0 Started by  Deleted User I am pleased to announce that Mark Piper is now the IDL Product Manager! Mark has been with Exelis VIS for over 13 years in various roles as the IDL training instructor and as a consultant in the Professional Services Group. He has a PhD in astrophysical, planetary and atmospheric sciences from the University of Colorado at Boulder. Mark has been using IDL for almost 20 years, and he loves using IDL and talking about it with others. It's been a fun and challenging experience as IDL Pro...
0 1142
20 Sep 2012 02:59 PM
4 Replies and 1457 Views SPAWN with .py  1457  4 Started by  Deleted User Hi everyone, I am trying to launch a script written in Python to georeference METEOSAT products from IDL, using the command SPAWN.This code is based on the use of FWTools Shell (windows) and, as far as I understood, IDL opens the cmd shell.Moreover, the python script is located in another folder. I tried manually to open the FWTools Shell, change directory to the location of the script, and launch it (directly calling the python script or calling a .bat file): in this way it works. With IDL...
4 1457
19 Sep 2012 05:29 AM
0 Replies and 1262 Views SPAWN with .py  1262  0 Started by  Deleted User Hi everyone, I am trying to launch a script written in Python to georeference METEOSAT products from IDL, using the command SPAWN.This code is based on the use of FWTools Shell (windows) and, as far as I understood, IDL opens the cmd shell.Moreover, the python script is located in another folder. I tried manually to open the FWTools Shell, change directory to the location of the script, and launch it (directly calling the python script or calling a .bat file): in this way it works. With IDL...
0 1262
19 Sep 2012 05:29 AM
1 Replies and 1428 Views Help with IDL Script to mimic ENVI Save ROI to ASCII type output  1428  1 Started by  Deleted User I have a script that loops through about 400 image files and uses an ENVI ROI to select a region of interest. I use a base file for the ROIs and the following to convert for each file: ;get the vector information from base file ENVI_EVF_INFO, Evf_id, num_recs=num_recs, data_type=data_type, projection=projection, $ layer_name=layer_name ;--------------------------------------- ; create a variable to contain the records in the vector file ; for us this should be...
1 1428
14 Sep 2012 01:29 PM
0 Replies and 1918 Views Using Motley graphics library  1918  0 Started by  Deleted User I'm new to IDL, and try to understand the way objects work.I have downloaded the Motley library and try to change the design of MGH_EXAMPLE_2PLOTS Any one know how graphs in that library works My first problem is, once the two plots are created, how do I later update the graphs with new data It seems that I have no access to the x-data and y-data, but it is probably because I don't understand the concept of 'model' and 'atom' used by the graph object thanks, Stefan
0 1918
14 Sep 2012 01:49 AM
1 Replies and 1347 Views Band math expression for combining multiple time series-images  1347  1 Started by  Deleted User Hello, is there any good expression for combining time series classified images in one file to get a commom result, if combining by assigning each pixel the commom value Thanks a lot!
1 1347
10 Sep 2012 05:36 AM
5 Replies and 1615 Views Line Detection  1615  5 Started by  Deleted User I'm looking for a way to detect lines (possibly using hough transform) in an image and either output the lines as x,y corrdinates or as a shapefile of only the lines. I haven't had much success in anything I've tried and am wondering if anyone here can help My endless googling hasn't resulted in much help. Thanks
5 1615
07 Sep 2012 02:30 PM
1 Replies and 1585 Views parallel for loops  1585  1 Started by  Deleted User hi, I am trying to parallelize a for loop, but I have problems with the IDL_IDLBRIDGE. I implemented following simple test programm: pro parallel_test split_for, 0, 10, commands=&91$ 'mm=i', 'nn=i'&93, $ varnames=&91'kk'&93, $ outvar=&91'mm', 'nn'&93, nsplit=6 end After running the programm I got the error: SPLIT_FOR: Splitting job into 5 threads SPLIT_FOR: Commands have been sent to threads SPLIT_FOR: All threads complete IDL_IDLBRIDGE Error: Und...
1 1585
04 Sep 2012 08:08 AM
0 Replies and 1242 Views IDLgrVIew - user defined projection  1242  0 Started by  Deleted User Hi again! Is there any way to implement a user defined type of projection when using the idlgrview object. I am thinking of overloading the particular method. Since i cant look inside the object, i dont no the projection mechanism. I want to implement fisheye view and other projection models. I am able to project 3d points using arbitrary projection models. But instead of projecting points i want to make use of idl's grid-framework to project whole grid models. Regards
0 1242
24 Aug 2012 02:19 PM
3 Replies and 1375 Views 3 dimensional arrays  1375  3 Started by  Deleted User Could it be a problem to handle with 3 dimensional arrays in IDL It seems to me that IDL have big problems with such big arrays and so the calculation time for such arrays is extremely high. Are there possibilities to handle with such arrays for instance with the help of GPULib best regards, peter
3 1375
24 Aug 2012 03:06 AM
5 Replies and 1899 Views Saving Polygon Plot  1899  5 Started by  Deleted User Hi When plotting polygons using the POLYGON()-Function, the plot seems to be implicitly triangulated and instead of a single polygon many triangles are plotted. When saving the plot to an eps-file one can see nasty white triangle boundary lines. Is there any way to plot neat color filled polygons without that behavior Regards
5 1899
24 Aug 2012 01:10 AM
2 Replies and 1611 Views Image Processing in IDL  1611  2 Started by  Deleted User Hi, Is it possible to execute all the image processing functionalities of ENVI in IDL For example if I want image atmospheric correction using FLAASH algorithm in IDL ...... is it possible or I wanto to run Spectral Angel Mapper algorithm in IDL .... is it possible. Any help will be highly appreciated. Regards, Partha Ghosh
2 1611
20 Aug 2012 05:36 AM
1 Replies and 1500 Views Cellular Automata (CA) in Envi,  1500  1 Started by  Deleted User Cellular Automata (CA) in Envi, I’m wondering if the Envi software has functions to deal with Cellular Automata (CA) and the origin-destination matrix (OD) in order to predict the future urban change based on given urban rasters Thank you, Best Jamal
1 1500
18 Aug 2012 09:51 AM
1 Replies and 1582 Views how to use BROYDEN? prompt BROYDEN: singular Jacobian in broydn.  1582  1 Started by  Deleted User Hi, everyone I am try to solve the eqation with IDL, non linear equation. and I use the broyden ,now I have a question. the code is below: function test2, x return, &91 500 / (1X&910&93 * EXP(-1*X&911&93)) - 3, $ 500 / (1X&910&93 * EXP(-2*X&911&93)) - 13&93 end FUNCTION test, X return, &910.3 * X&910&93 / (!pi *(1-0.3 * X&911&93)) X&912&93 - 121.362, $ 0.4 * X&910&93 / (!pi * (1-0.4 * X&911&93)) X&912&93 - 156.77, $ 0.5 * X&910&...
1 1582
16 Aug 2012 06:39 AM
1 Replies and 1357 Views Help making xyouts text easier to read  1357  1 Started by  Deleted User Hi guys, I'm using xyouts to draw location names on top of a map, with zones of various colours. As you can see in the image below the text become hard to read when certain colours are used such as blue. My question is: Is there an easy way to add say a background of white which is only applied to the xyouts text area That would make the text easier to read. Any other suggestions on how I could make this more readable are welcome. However they must be using Direct G...
1 1357
15 Aug 2012 07:46 PM
1 Replies and 1259 Views Deal with pointer in DLL  1259  1 Started by  Deleted User Recently I want to use dlm to wrap all the c functions to read .dwg format file ! First, I made a simple start to begin with one object of polyline. then I construct the polyline struct as this: struct AcDbPolyline{ IDL_LONG numverts; IDL_LONG color&913&93; double* vertices; IDL_STRING layer; }; because vertices' number is uncertain,so I made it a pointer ! the other fields can be easily done. I do not find any example in 'calling c from IDL' in chapter 7 that ca...
1 1259
11 Aug 2012 07:39 PM
1 Replies and 1211 Views TROUBLE WITH PASSING STRUCTURE  1211  1 Started by  Deleted User Just like the Ron king's book 'calling c from IDL ',In chapter 7,it talks about how to pass stuctures between IDL and c. Now I need to get a structure created in c files. I followed the third example in that book.And I use the exactly the same name as it with the sufix '.c'.But the compiler says there are about 12 errors. Is there any wrong with this example ! Is there anyone succeed. then I use the suffix '.cpp' ,then the compiler give no error. but when I test the function declared in t...
1 1211
10 Aug 2012 08:03 PM
1 Replies and 1324 Views IDL's Change Request System - Question?  1324  1 Started by  Deleted User Hi Guys, Could someone please explain to me how Exelis's change request system for IDL works I have submitted a technical support request which has since been closed with the outcome being that a bug was filed in the change request system. I have been given a CRS number but what do I use this for Is there a way to track this change request I have looked for information about this on the website but can find nothing. Thanks, Tim
1 1324
09 Aug 2012 08:24 PM
2 Replies and 1159 Views hough transform  1159  2 Started by  Deleted User Hi all, I'm not all too familiar with IDL but am attempting to find the x,y coordinates of the points of a line after performing a hough transformation line detection. Here is what I have so far and I don't know where to go from here as to how to find these x,y line points. Any help would be greatly appreciated PRO houghtrans ; Determine path to file. ;file = FILEPATH('H:\Test\Hough\lake.tif') ; Import image from file into IDL. image = READ_tiff('H:\Test\Hough\dock.tif') ...
2 1159
09 Aug 2012 02:44 PM
3 Replies and 1545 Views Anyone knows how to get eigenvectors and eigenvalues for singular matrix in IDL?  1545  3 Started by  Deleted User Anyone knows how to get eigenvectors and eigenvalues for singular n*n matrix in IDL The singular matrix is not positive definite or semi-definite either, so the SVD does not equal eigendecomposition. Any ideas In matlab, eigs could provide some eigenvalues for singular matrix. But in IDL it always gives me error when using any eig related command.
3 1545
06 Aug 2012 03:17 PM
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