[FFmpeg-trac] #5074(undetermined:new): support perceptual hashing
FFmpeg
trac at avcodec.org
Mon Dec 7 19:18:04 CET 2015
#5074: support perceptual hashing
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Reporter: dericed | Owner:
Type: enhancement | Status: new
Priority: wish | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by dericed):
Here's a good introduction to it:
http://bertolami.com/index.php?engine=blog&content=posts&detail
=perceptual-hashing. Also see the citations at
https://en.wikipedia.org/wiki/Perceptual_hashing. Some image search cites
that use perceptual hashing are http://tineye.com/ and
http://images.google.com/.
A use case could be:
- a user has a set of 1,000 files representing source material and
finished work encoded with various lossy encodings
- something like `ffmpeg -i sourcefile.mkv -f perceptualhash
sourcefile_perceptual.txt` could be generate per file which would contain
something similar to the output of framemd5 but with perceptual hashes
instead of md5 values
- the perceptual hashes could then be indexed to reveal relationships
between the media. i.e. these source files contain frames that look like
frames in this edited work.
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Ticket URL: <https://trac.ffmpeg.org/ticket/5074#comment:2>
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