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[KFJ <721156@xxxxxxxxxxxxxxxxxx>]

** Attachment added: "gzipped tar, contains pto, input, output demonstrating bug"
   https://bugs.launchpad.net/bugs/721156/+attachment/1857317/+files/mask_bug.tgz

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https://bugs.launchpad.net/bugs/721156

Title:
  left image margin shows though image is totally masked

Status in Hugin - Panorama Tools GUI:
  New

Bug description:
  I noticed what I think is faulty mask processing on images where a mask boundary coincides with the left image boundary. I have managed to produce a very simple demonstartion of the behaviour with the enclosed files. The pto contains a single monochrome image with a mask of precisely the same dimensions, and one would assume that this should render the whole image invisible. But in the previews and in the final output, a narrow strip of the image's left margin still shows. In the pto I have attached I have centered on this and chosen a small FOV to make this well visible - if you can reproduce the bug it would show as a vertical malachite band in the preview. The attached file contains input image, pto and output image - since the images are jpg and very small, I took the liberty to attach them as well. Notice that I manually edited the k-line in the pto to position the mask precisely on the image boundaries.
  I noticed this using Pre-Release 2010.5.0.5a0bdb77823c, self-compiled on Kubuntu 10.10, but I've seen it earlier as well and was never bothered enough to send in a bug report. I think it only occurs if the left margin coincides with the mask and the remainder of the mask can be any shape.
  Kay