Hello,
I've documented my problem in the following tarball:
http://rapidshare.com/files/235284536/problem.tar.bz2.html
MD5: 727BAE9EF9F93CDD64215BE01E704CD5
Here is the associated README.sh:
#!/bin/bash
# I used tif2svg/inkscape to create the seams by hand and then enblend-svg
# to create the blendable images, of which {05,09,10,11}.tif are a selection.
#
# The scene involves the Sun, which I've decided I want to be a white 'hole'
# in the final panorama. However, just clipping out the region in inkscape is
# not enough, because enblend will leave hard edges---it doesn't like to blend
# unless non-transparent pixels overlap.
#
# The obvious solution is to add another picture---one that is just white and
# cut the seams appropriately in inkscape. Unfortunately, I've run into 2
# problems:
#
# * I wanted 11.tif to provide the white area with which {05,09,10}.tif
# could be blended nicely. However, enblend gives up when the pixels
# are white, saying that 11.tif is grayscale while the other input
# images are color. After searching online, I've concluded that this
# is likely the fault of ImageMagick, which tries to optimize for space:
# finding that there is only white pixel data, it creates a grayscale
# tiff rather than an RGB tiff.
#
# * As an experiment, I converted the white area into a yellowy area
# in the hope that it would bypass the first problem. Fortunately, it
# works, but emblend itself misbehaves: The golden area is shifted up
# in the image and blended with the wrong parts. The behavior is utterly
# bizarre. I ended up opening {05,09,10,11}.tif in GIMP and then copying
# them all into one image (in that same order): The result is the image
# 05_09_10_11.png, which clearly shows that everything should match up
# perfectly. WTF is going on?
#
# Use this to build the panorama and see for yourself:
enblend --fine-mask -o pano.png 05.tif 09.tif 10.tif 11.tif
# The `--fine-mask' handles the thinly overlapping seams that I have created;
# without it, I've experienced some horrendous artifacts such as completely
# blackened regions.
I'm currently using enblend 3.2 (CVS HEAD segfaults).
Sincerely,
Michael Witten
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