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1 Replies and 1780 Views
Batch mode vectorize? 1780 1
Started by Deleted User
I was wondering whether it was possible to convert raster to vector using ENVI batch mode. I would like to be able to convert a series of images to shape files.
thanks,
Christian
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1 |
1780 |
29 Jan 2007 07:37 AM |
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4 Replies and 1605 Views
replace bad samples(columns) 1605 4
Started by Deleted User
i would like to inform me if there is a tool to perform bad samles correction for hyperion images
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4 |
1605 |
24 Jan 2007 04:40 AM |
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2 Replies and 1493 Views
classifying regular photos, repeat photog analysis 1493 2
Started by Deleted User
I and a number of colleagues have become interested in repeat photography for monitoring lichen growth and cover. Photos could be close-ups of lichen covered rocks, or slightly more distant photos of trees draped with lichens. I've been playing a little with classifying some images, but so far it seems that shadow variation causes a lot of error.
Does anyone have experience with similar situations that they would like to share Any citations of papers I should read
Suggestions on trans...
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1493 |
19 Jan 2007 07:09 PM |
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0 Replies and 1401 Views
DEM production and RPC calculation 1401 0
Started by Deleted User
I'm using Envi 4.2 and SPOT 4 Pancromatic (Level 1A) images in order to produce the DEM of the area. In the first step of Dem Extraction Wizard, it calculates the RPC values and estimates the scene elevation meters. In this process I've tried 3 different pairs (from the different parts of the country) but the min. elevation was calculated as -100,00m every time which is not possible for the areas. Is there a specific reason for this How can i solve this problem (I can change the min. value as ...
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1401 |
19 Jan 2007 11:07 AM |
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0 Replies and 1667 Views
programmatically add menu item to Available Bands right-click menu? 1667 0
Started by Deleted User
I know how to programmatically add menu items to the main ENVI menu bar (ENVI_DEFINE_MENU_BUTTON) and have used it successfully. However, right now I would like to add some conveniences to the menu that pops up when I right-click on a file in the Available Bands window. I am not having success with my attempts to implement ENVI_DEFINE_MENU_BUTTON. What are the tricks
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1667 |
16 Jan 2007 04:17 PM |
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1561 |
04 Jan 2007 06:25 PM |
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0 Replies and 1438 Views
Multitemporal pixel regression 1438 0
Started by Deleted User
Dear all,
I wonder if anyone has ever developed or applied and IDL algorithm that will allow to extract from a time series of images slope, intercept, R-square and even associated probability of a
pixel-to-pixel regression analysis, in order to evaluate the temporal trend of each pixel in that time series of images. Independent variable will be time and dependent variables will be the different values acquired for every pixel along time. Results (a, b, R2, p) would be provided in images. ...
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1438 |
03 Jan 2007 02:56 PM |
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2 Replies and 1943 Views
Minnaert correction 1943 2
Started by Deleted User
How can I do Minnaert correction, one of topographic corrections, in ENVI
Are there any routines or should I make a IDL code
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2 |
1943 |
28 Dec 2006 08:14 PM |
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1345 |
27 Dec 2006 03:06 PM |
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1 Replies and 1395 Views
ASTER georeferencing 1395 1
Started by Deleted User
Has anyone experienced locational problems when using ASTER1b or ASTER1a georeferenced
data in ENVI Whatever I try... the imagery appears shifted too far south. Would like to determine if this
problem is specific to ENVI software or ASTER products.
Thanks,
Jessica Mitchell
Department of Geosciences
Idaho State University
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1 |
1395 |
20 Dec 2006 09:20 AM |
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1 Replies and 1552 Views
ENVI and the IDL Virtual Machine 1552 1
Started by Deleted User
Hi,
I would like to distribute an IDL application that makes use of some of the built-in ENVI routines (e.g., ENVI_GET_MAP_INFO, ENVI_INIT_TILE, ecc.) with the IDL virtual machine.
Did anyone tried to do that Is it possible or the users need to have an ENVI license in order to have access to ENVI routines
Thanks for your help,
Lorenzo Busetto
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1 |
1552 |
20 Dec 2006 01:45 AM |
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1 Replies and 1415 Views
Removing/deleting EVF files 1415 1
Started by Deleted User
I am writing a program that extracts a large amount of vector data, but I don't need to save all of it to disk nor does it need to be automatically loaded in the ENVI software ( i.e., into the Available Vectors list).
I am looking to do something like:
envi_file_mng, id=evf_id, /delete, /remove
for evf files. The above line, of course, does not work for evf files, but if you are familiar with this command it is the sort of behavior I would like to emulate.
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1415 |
08 Dec 2006 01:23 PM |
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1 Replies and 1607 Views
Band Ratios 1607 1
Started by Deleted User
Is there a way to perform all possible band ratio combinations on a hyperspectral image as some type of batch processing instead of one ratio at a time
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1 |
1607 |
06 Dec 2006 05:39 AM |
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2 Replies and 1353 Views
to calculate lake area from temporal landsat images 1972 to 2002) 1353 2
Started by Deleted User
I would like to calculate lake area from temporal landsat images 1972 to 2002 ( Landsat MSS) with TM & ETM some of them).
I appreciate if you give me any idea on how to proceed. Is there any possibilty to export to mapinfo/global mapper .
I am not sure which combination of bands differentiates water body from vegetation...
my idea is to establish stage(lake level)- volume relationship for my water balance computation of the lake.
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1353 |
04 Dec 2006 08:06 PM |
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1 Replies and 1599 Views
Need help writing spatial subset of georeferenced MODIS data in batch ENVI 1599 1
Started by Deleted User
I thought this would be simple, but things are not working as I had expected and I am confused. I hope someone can explain what I'm doing wrong.
I have many MODIS L2 files from which I want to create a series of maps with data from the same spatial subset. The files are HDF, but are not those that can be directly read by ENVI. Here is what I am doing:
Generate an input projection that represents the input file (/Geographic).
Generate an output projection for my map, projected using Lam...
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1599 |
04 Dec 2006 01:07 PM |
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0 Replies and 1757 Views
Automated command generation for Batch Processing 1757 0
Started by Deleted User
We are interesting in getting ITTVIS to implement batch mode command file generation in ENVI. Such a capability should allow the user to record a series of ENVI commands from the GUI then run the commands in batch mode against a set of source files and generate new files if necessary; for example, specify a source file and destination file directory. If enough ENVI users need such a capabilty then ITTVIS might implement it.
If you are interested in such a capability then please email me. A...
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1757 |
30 Nov 2006 06:09 PM |
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1 Replies and 1275 Views
Recovering ROI info when base image is lost 1275 1
Started by Deleted User
I have an ROI that I'm trying to recover the spatial information out of (it should be a bunch of pts), but the file it is related to is long lost, and I have no idea what the number of lines and number of samples of that file is -- is there any way for me to pull the info back out of this ROI ENVI_GET_ROI_IDS requires the file the ROI is associated with, not the ROI itself. Thoughts
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1275 |
28 Nov 2006 09:30 AM |
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1 Replies and 1613 Views
How is resampling used in PC pansharpening? 1613 1
Started by Deleted User
I'm curious how the resampling selection matters to the PC pansharpening Does it have to do if there is a non-integer factor between the low and high res bands (e.g. 1.5m and 5m imagery) If I have an integer multiplicative difference between the high res band and the low res band resolution (e.g. IKONOS 1m and 4m), should I just use nearest neighbor Thanks!
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1613 |
28 Nov 2006 09:28 AM |
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1 Replies and 1696 Views
Mosaic color balancing question 1696 1
Started by Deleted User
Say I have four images running west to east, each one overlaps with the ones directly to the east and west:
A B C D
I want to have them all color balanced using the overlapping zones. I select C as the fixed image, and A, B and D as 'Adjust'. My question is this: how, exactly, does 'A' get color balanced, given that it doesn't actually overlap with C. Does the algorithm first color balance B and D, and then use the overlap between A and the now color balanced B to color balance A
...
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1 |
1696 |
20 Nov 2006 05:04 AM |
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6 Replies and 1800 Views
2D Scatter Plots 1800 6
Started by Deleted User
Hi ,
I am using ENVI. I want to use ' 2D Scatter Plots' to show scatter plots of two bands. However, in ENVI, it only shows us the 'Image 'window section but not the 'Scroll' windows. Even if I changed the windows size in the 'Preferences' it could not show the whole images.
I am ENVI newer, how do I have the plot of two bands of whole images
If anyone have had this, please share your thoughts.
Thanks,
Eric
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6 |
1800 |
14 Nov 2006 07:57 AM |