My boss asked me to mosaic and color-balance multiple Landsat 8 tiles for presentation. I tried to do that in ERDAS but it returned weird result as below:

enter image description here

Obviously it's the black edges or nodata pixels were counted while balancing the color. Is there a way to eliminate those annoying pixels?

The tiles were exported from the direct 16-bit USGS ".tar.gz" data files into 8-bit images. And the 8-bit images were then brought in to the Mosaic Pro session for color correction. All processes were done by ERDAS. However I also tried to export the 8-bit images through ArcGIS and then process in ERDAS Mosaic Pro but the result was the same.

  • Have you tried creating an AOI for each image that can the be added to the mosaicing process? This serves to clip the images to exclude the locals not needed.
    – geoCAK
    Nov 4, 2015 at 1:17
  • Pixals, not locals.
    – geoCAK
    Nov 4, 2015 at 1:17
  • Thank you for answering. PROBERT's method worked well - just check "compute active area" when importing image to Mosaic session.
    – PacmanKX
    Nov 4, 2015 at 17:25

1 Answer 1


Number 1: what version are you using ?

Number 2: Don't use the AOI as it is diffcult process to do for more than 2 images.

Number 3: Scroll down to page 18 as it is giving you how to mosaic many images http://www.gis.usu.edu/~alex/WILD6750/Lab05/Lab05/Lab5_Mosaic_TourGuide.pdf

  • It's version 15.
    – PacmanKX
    Nov 4, 2015 at 16:45
  • 1
    Thank you! The black edge problem is solved. I think the key step is when import image to the Mosaic session, I should check "compute active area" to eliminate the black edges. Thank you again for this great tutorial.
    – PacmanKX
    Nov 4, 2015 at 17:24
  • @PacmanKX i am glad to hear that you got your problem solved !
    Nov 4, 2015 at 17:35

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