| 10 Dec 2012 12:02 PM |
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Hi,
according to the User Guide the wavelength information of Quickbird images will be retrieved by ENVI when reading the file via File -> Open External File -> Quickbird -> GeoTIFF.
ENVI 4.8 did so once when I conducted Gram-Schmidt Spectral Sharpening. However, I would also like to do CN Spectral Sharpening and while the multispectral image gets all the information, the panchromatic doesn't.
I there a possibility that something got jammed and I can force it somehow (delete some settings file, to be fresh generated)?
Thomas
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MariM
Veteran Member
Posts:2396  
| 11 Dec 2012 07:33 AM |
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There is an issue with some datasets, such as QuickBird and WorldView, where the metadata is not passed to the file. This should be fixed in the next release of ENVI or a service pack. For now, you can try it in ENVI Classic.
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Deleted User
New Member
Posts: 
| 11 Dec 2012 07:51 AM |
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It worked before, otherwise I would have not been able to perform the Gram-Schmidt Spectral Sharpening.
Apart from that I believe I am already in ENVI Classic. In the ENVI 4.8 folder in the Start-menu it is only called ENVI, but I don't think more classic than this GUI is available within ENVI 4.8. The only other possibilities I have would be ENVI+IDL and ENVI Zoom.
How can it be that it is working in one moment and the next moment it doesn't? Also the multispectral image always gets the wavelength and FWHM information!
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MariM
Veteran Member
Posts:2396
| 11 Dec 2012 08:12 AM |
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I was under the impression you were using ENVI 5 and comparing it to ENVI 4.8. I find opening a Quickbird multispectral and panchromatic band will include wavelengths and FWHM for the multispectral image but not the pan. GS sharpening only requires wavelengths defined. CN sharpening is designed to sharpen lower resolution hyperspectral images with higher resolution multispectral images so it requires FWHM to determine which high resolution bands will replace the low resolution bands. In ENVI 4.8, you can define the fwhm for the pan band by editing the header file but it doesn't seem that CN sharpening is necessary for sharpening using a single pan band.
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