I have to mosaic two rasters (Landsat ETM+ scenes) to one single image and then analyse its land cover. Which option to use to avoid seeing a distinct line in the place where two different scenes/rasters are joined? I am using ArcGIS 10.0 and eCognition.

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    Do both images have the same pixel resolution? What have you tried that shows a distinct line? – artwork21 Jul 7 '15 at 11:56
  • Both have the same resolution, I have tried mosaic to new raster first/last. I am not sure If I can do blend or average because they change the pixel number and I fear it would have effect on subsequent classification. – Marin Jul 7 '15 at 20:14
  • Would you mind to model/code the analysis? Than you could run it separately on each raster. After you have canged it to land cover categories, mosacing should be easier. – dof1985 Jul 7 '15 at 20:44
  • Were the scenes acquired at different time periods? If so, you will need to atmospherically correct them. Dark object subtraction is a common method for this. – Aaron Jul 7 '15 at 20:52
  • I thought about the idea to classify each scene separately, but again there is an issue of the seam - it's always far from perfect. The scenes were acquired at different period, I will look into dark object subtraction. I have meddled with histograms and histogram matching in ArcGIS - could that be the way to go? Also, I am trying to mosaic scenes, so I have to apply corrections to each channel separately? Times the number of scenes? This is what and where I have been doing the histogram changes: olimpijada.files.wordpress.com/2015/07/seam_landsat.jpg – Marin Jul 8 '15 at 11:19

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