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10 Replies and 970 Views Access Denied - Verification Pending  970  10 Started by  Lisa Upton Why did I receive an "Access Denied - Verification Pending" error message
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by  Belgin BasrievJump to last post
07 Jun 2018 02:29 AM
15 Replies and 115 Views ENVI - Estimate Noise Statistics From Data - Error  115  15 Started by  Vicente Jeria Hi everyone! I have this problem: when I am calculating the Estime Noise Statistics From Data in ENVI, I get the following error: 'The number of the pixels in the shift difference spatial subset should greater than the number of input bands. Please enlarge the spatial subset for noise statistics'. In other topic, I read that this problem may occur due bad bands, maybe identical min and max values or values equal to 0 and that I have to edit the header of image. In this sense, I don´t know how...
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by  Mari MinariJump to last post
06 Jun 2018 06:33 AM
0 Replies and 39 Views Problem with the projection of Worldview 3 image  39  0 Started by  Tharindu Abeysinghe Hi, I have a WorldView 3 image with multispectral (only 8 bands; Coastal, Blue, Green, Yellow, Red, Rededge, NIR1, NIR2) and panchromatic band. I can open one (either multispectral or panchromatic) of them without any problem in ENVI 5.4. But when I open both images in same ENVI window, both multispectral and panchromatic bands get distorted (looks like both are projected to a different coordinate system). Both images are in Geographic coordinate system- GCS_WGS_1984, Datum- D_WGS_1984. Can ...
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14 May 2018 07:21 PM
6 Replies and 159 Views SVM classification for multiple scenes with one set of ROIs  159  6 Started by  Prabha Rupasinghe I am trying to classify Sentinel 2 images for a very large area using the SVM classification. Currently, I can only process an area about 25 sq km at a time to get the desired accuracy. I also explored other classification methods but only SVM gives me good accuracy for my purpose. As my area is very large, it takes me ever to define ROIs for small pieces of images. Is there a way I can use a single set on ROIs for all my pieces Or is there any other method to make this process easier and fast...
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by  Prabha RupasingheJump to last post
11 May 2018 10:47 AM
1 Replies and 102 Views DarkSubtractionCorrection Task  102  1 Started by  Russell Ives Running the 'DarkSubtractionCorrection' task in an API on reflectance values from a calibrated Worldview 2 data where the image boundary data has a pixel state of 1 are being calculated as negative values on the output raster. How do I stop this Here is the section of code doing the calculation (with forcing 'data ignore value' param). ;***Add data ignore value to the metadata **** IF (metadata.HasTag ('data ignore value')) THEN BEGIN metadata.UpdateItem, 'data ignore value', 0. ...
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by  Mari MinariJump to last post
20 Apr 2018 12:26 PM
1 Replies and 99 Views Harris Support Request Webpage is balnk  99  1 Started by  Wayne Rigby The link doesn't do anything currently (from Chrome or Internet Explorer). I'd like to report an IDL bug, but I can't contact you. --Wayne
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by  Mari MinariJump to last post
02 Apr 2018 11:01 AM
0 Replies and 212 Views Water band removal error for HSI image at time of FLAAST process  212  0 Started by  Jay Mishra FLASH shows the error when the Water removal option is activated, I have changed the tile value from the 100 to 2000 MB, but not change of error. It is requested to kindly help me. Error Message:
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21 Feb 2018 12:29 PM
2 Replies and 482 Views Linear Spectral Unmixing (LSU)  482  2 Started by  Bisma Qazi Hi, How do we decide the weight in case of LSU I am getting values >1 and < 0 in the output images even after applying the sum constraint and setting the weight to default value (1)
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by  Bisma QaziJump to last post
13 Dec 2017 05:10 AM
10 Replies and 625 Views LAI inbuilt spectral indices tool limitations  625  10 Started by  Yahampath Marambe I am using ENVI to produce LAI map series. ENVI use the following equation to calculate LAI. (Eq1) - LAI= (3.618*EVI) - 0.118 However, the value range of EVI is -1 to 1. Then the maximum value of LAI should be 3.50 according to the equation if EVI reaches to its maximum. Typically, ENVI gives LAI values greater than that value (3.50) also. Is ENVI using a higher upper limit for EVI than the typical range (-1 to 1) This equation also gives negative values for the LAI. I wo...
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by  Mari MinariJump to last post
06 Dec 2017 03:14 PM
0 Replies and 321 Views Trouble Verifying Account  321  0 Started by  Claire Leyden I received a verification e-mail, but when I click on it, I'm prompted to login. Once I login I receive the message 'You are using an unverified account. Please verify your account by clicking on the link contained in the verification email that has been sent to you.'
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13 Oct 2017 07:58 AM
5 Replies and 517 Views IDL batch export to tiff from problematic hdf files  517  5 Started by  PBreeze123 I have a large number of (nearly a thousand) rasters in .hdf (hdf4) format from the GLASS albedo product. Unfortunately there is a problem with the projection information/header data which means ARCGIS, GDAL, QGIS, SAGA, and GRASS all seem to have problems with the data/will not recognise the projection. This problem has been acknowledged by the product support team as a known issue, but will not be resolved until the next release, until which time they suggest manually editing the headers (see ...
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by  Mari MinariJump to last post
23 Jun 2017 08:44 AM
2 Replies and 538 Views Use of classification classes in ENVI Band Math  538  2 Started by  ahmad hmdan Hi, I have produced a crop map, and I need to calculate a number of biophysical variables using specific equations for specific crop class . I did it before using Matlab. But how can I do that using ENVI-Band math Thanks
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by  josh edwardsJump to last post
21 Jun 2017 03:59 AM
1 Replies and 625 Views  625  1 Started by  Jade Williams On your blog page you reference a column sort routine, and give a link to download it at: I am unable to access the site. Help please!
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by  Mari MinariJump to last post
17 Apr 2017 11:20 AM
20 Replies and 792 Views Regarding FLAASH correction  792  20 Started by  Bisma Qazi
(Topic has multiple pages1 2 )
Hi, I am trying to do atmospheric correction on AWiFS data onboard IRS-P6 using FLAASH module of ENVI 5.1. I have some doubts in the parameters that need to be inputted into the module. In the multispectral settings tab, there is an option for water reference channel, what does it mean Also an option for index to first band is there, If the value is set from 1 to 4, then it displays the following error message. 'filterfunctionfile'.sli doenot contain enough bands for the given input image. plea...
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by  Bisma QaziJump to last post
17 Apr 2017 03:37 AM
0 Replies and 486 Views Band Math  486  0 Started by  ahmad hmdan Hi, I would like to specify the Conditional Statements using Band math of Envi for this equation (Ln(1-(B1/b))) to avoid the NAN values. When B1 is equal to b then I got NAN values (ln (0)), because the real natural logarithm function ln(x) is defined only for x>0. Thanks
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15 Jan 2017 08:55 AM
1 Replies and 398 Views Band Math  398  1 Started by  Bisma Qazi How can i write this expression in ENVI band math r=(∑_i¦(x_i-x_m ) (y_i-y_m))/(√(∑_i¦(x_i-x_m ) ^2 ) √(∑_i¦(y_i-y_m ) ^2 ))
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05 Dec 2016 04:18 AM
3 Replies and 350 Views error in flaash of EO-1 Hyperision image  350  3 Started by  rajchandar padmanaban I am a user of ENVI5.2, Now I have a problem in dealing with Flaash. we want to use Flaash for our EO-1 hyperison image, the image has 179 bands after the pre-procession. and the faash always enconter an error after the process bar went to 58 done, the error shows: ACC error: h2oinv: h2oinv IDL error MOMENT: X error must contain 2 OR more elements. if I do not choose water retrieval, there is also an error: tile0.img, the process did not finish correctly I DO NOT know where the problem is,and...
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20 Oct 2016 05:46 AM
2 Replies and 347 Views PCA  347  2 Started by  Bisma Qazi Firstly,I would like to ask that why am I unable to access my previous posts. Secondly, I performed PCA on an image in ENVI and also in ERDAS. There was a huge difference between Eigen values and Eigen vector matrix computed in the two platforms. Why is it so Also, do the rows of the eigen vector matrix represent different PCS or original bands in ENVI. Say, for example, if I got a matrix like this Eigenvector Band 1 Band 2 Band 3 Band 4 Band 1 0.587621 0.598896 0.543896 ...
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10 Oct 2016 06:23 AM
1 Replies and 337 Views MTMF Result display  337  1 Started by  Rakesh Kumar Mishra I have classified an HSI image using MTMF method. The outputs are MF Score and Infeasibility for each class. I am trying to display all classes together in one image with different color for each class (similar to the SAM result). I am sure there should be a way in ENVI to display MTMF result where we can see all classes together with different color in one image. Can anyone please let me know how to do this Thanks you !
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14 Aug 2016 09:35 AM
6 Replies and 318 Views SAM classification using ASCII file  318  6 Started by  Samira Safaee We are trying to create a comprehensive spectral libraries for both 'soil' and 'salt' based on 8 study areas and use those spectral libraries in Spectral Angle Mapper algorithm in order to map the salt pans existed in the entire world. To do so we need to use ASCII files which contain only band values of each individual pixel in each band without location information. I have read that the right format for importing spectral information is the one that has 2 columns of number of bands and mea...
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02 May 2016 12:44 PM
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