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I have an image mosaic of 5 Landsat TM5 scenes. Where the scenes overlap there is a dark band, only on the left and right sides, but the top and bottom are seamless. What is the best way to correct this in Erdas 2011?

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Maybe just trimming away the borders will do the problem away... ? See How to trim Landsat 5 scene edges – Nikos Alexandris Jan 4 '13 at 22:53
can you post an image or link to an image? – gm70560 Mar 29 '13 at 19:11

If you are doing the mosaicing, I would suggest using the Mosaic Pro tool and then setting the "Set Overlap Function" (fx icon) to Maximum. If the overlapping bits are 0 or Null data it will take the highest value, in this case the imagery and exclude the edges.

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