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Copyright (C) 2004-2007 Andrew Mihal.
This file is part of Enblend.
Enblend is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Enblend is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Enblend; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Enblend uses the VIGRA computer vision library.
VIGRA is Copyright 1998-2002 by Ullrich Koethe
Cognitive Systems Group, University of Hamburg, Germany
Please see the file VIGRA_LICENSE for details.
ENBLEND
Enblend is a tool for compositing images using a Burt & Adelson multiresolution
spline. This technique tries to make the seams between the input images
invisible. The basic idea is that image features should be blended across a
transition zone proportional in size to the spatial frequency of the features.
For example, objects like trees and windowpanes have rapid changes in color.
By blending these features in a narrow zone, you will not be able to see the
seam because the eye already expects to see color changes at the edge of these
features. Clouds and sky are the opposite. These features have to be blended
across a wide transition zone because any sudden change in color will be
immediately noticeable.
Enblend expects each input TIFF to have an alpha channel. The alpha channel
should indicate the region of the file that has valid image data. Enblend
compares the alpha regions in the input files to find the areas where images
overlap. Alpha channels can be used to indicate to Enblend that certain
portions of an input image should not contribute to the final image.
Enblend does not align images for you. Use a tool like Hugin or PanoTools
to do this. The TIFFs produced by these programs are exactly what Enblend is
designed to work with.
INSTALLATION
./configure
make
make install
See INSTALL for more information.
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