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[Enrico Mattea <ocirne94@xxxxxxxxx>]

Further research: the bug affects also enblend (using two vertical
halves of the same images as above). With a plus: with enblend I also
get other parasite horizontal lines, white with a light blue pixel at
the left end, 1px thick and vertically spaced by 32px. They appear in
the bottom region of the image, apparently below the 10'000th pixel. See
attached image.

** Attachment added: "screen.png"
   https://bugs.launchpad.net/enblend/+bug/1598469/+attachment/4694400/+files/screen.png

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https://bugs.launchpad.net/bugs/1598469

Title:
  enfuse introduces a white stripe

Status in Enblend:
  New

Bug description:
  Command: $ enfuse im1.tif im2.tif
  where im1.tif and im2.tif are 16-bits-per-channel sRGB 10980x10980 images from the Sentinel2 satellite.
  Steps to reproduce:
  1- download the monochromatic bands (http://sentinel-s2-l1c.s3.amazonaws.com/tiles/32/T/LS/2016/2/5/0/B0 {2,3,4} .jp2)
  2- convert 15 to 16 bits and combine to tiff (convert {4,3,2}.jp2 -depth 16 -combine rgb.tif)
  3- apply some curve to the rgb image e.g. with gimp. Do this twice with different curves (I'm combining with enfuse the outputs of such different curves to preserve highlights)
  4- save to tiff
  5- run enfuse on the 2 tiffs -> white stripe

  An unexpected irregular white stripe about 20 pixels thick appears
  near the lower boundary of the resulting a.tif image, uninterrupted
  from the left side to the right side. No change using the --no-ciecam
  option.

  enfuse version:
  Version 4.1.4+dfsg-5/unstable - Thu, 28 Jan 2016 19:34:42 +0100
  installed through official repositories of Kubuntu 16.04 (64-bits).

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