NAME¶
uprightdiff - examines the differences between two images
SYNOPSIS¶
uprightdiff [options] <input-1> <input-2>
<output>
DESCRIPTION¶
uprightdiff examines the differences between two images. It produces a visual
annotation and reports statistics.
It is optimised for images which come from browser screenshots. It
analyses the image for vertical motion, and annotates connected regions that
have the same vertical displacement. Then it highlights any remaining
("residual") differences which are not explained by vertical
motion on a pixel-by-pixel basis.
- --help
- Show help message and exit
- --block-size arg
- Block size for initial search (default 16)
- --window-size arg
- Initial range for vertical motion detection (default 200)
- --brush-width arg
- Brush width when heuristically expanding blocks. A higher value gives
smoother motion regions. This should be an odd number. (default 9)
- --outer-hl-window arg
- The size of the outer square used for detecting isolated small features to
highlight. This size defines what we mean by "isolated". It
should be an odd number. (default 21)
- --inner-hl-window arg
- The size of the inner square used for detecting isolated small features to
highlight. This size defines what we mean by "small". It should
be an odd number. (default 5)
- --intermediate-dir arg
- A directory where intermediate images should be placed. This is our
equivalent of debug or trace output.
- -v [ --verbose ]
- Write progress info to stderr.
- --format arg
- The output format for statistics, may be text (the default), json or
none.
- -t [ --log-timestamp ]
- Annotate progress info with elapsed time.
AUTHOR¶
Tim Starling <tstarling@wikimedia.org>