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Mosaic_doit in IDL gives a different result that the ENVI mosaic tool [message #69465]

Wed, 06 January 2010 23:22

laureroupioz
Messages: 6
Registered: July 2009

Junior Member

Hello everybody,

I have a question regarding the mosaic_doit command in IDL. I used
this command to mosaic several images extracted from Modis hdf data
using the Modis conversion toolkit. In order to valid the result
obtained using IDL, I mosaicked the same images using the mosaicking
tool in ENVI. The results are quite similar however the pixel values
can slightly vary between the two methods. I tried to look at all the
parameters that can be set in mosaic_doit but I don’t understand where
this difference comes from. When looking closer at the result, the
pixel size of the 2 outputs is the same however the number of rows and
columns is different, the mosaic performed in ENVI present one row and
one column more. Then I assume that the difference comes from a shift
in pixels due to this lacking column and row. By comparing with the
original image the result of ENVI seems to be the correct one. Do you
think the problem could come from the georef_mosaic_setup script? Do
you know how I could solve this problem in IDL?

Thank you for your help.
Regards,

Laure

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Mosaic_doit in IDL gives a different result that the ENVI mosaic tool

By: laureroupioz on Wed, 06 January 2010 23:22

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