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Last Post 18 Jun 2015 04:44 PM by  anon
ROI tool readin DN=0 of mosaic
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anon



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18 Jun 2015 04:44 PM
    Hi, I mosaicked 10 WV2 images, for some reason, the ROI tool is reading the statistics (for certain areas) as DN=0 in the 8-band mosaic. I am trying to run a classification but the software is not picking up the statistics for each class (show as DN=0). Other info: ENVI 5.1, file size is 105GB, 8bit, pansharpened product, I used colorbalancing from the "Seamless Mosaic" tool. I also color-balance some images manually using band-math. I had to convert the FLOAT band-math output back to BYTE for mosaicking (stats read good). I cropped the images using ROI tool.

    MariM



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    19 Jun 2015 07:28 AM
    Do you have access to ENVI 5.2 SP1? I think you should try this in the latest version of the software since there have been improvements in the ROIs in this version. Also, in the header file of the mosaic (use File->Edit ENVI Header), make sure the x/y start values are set to 1. These offsets have caused some issues when calculating statistics on some files.
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