Date: Sun, 6 Sep 2009 22:31:12 -1000 From: parv@pair.com To: modulok@gmail.com Cc: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>, freebsd-questions@freebsd.org Subject: Re: Is there such thing as a 'soft checksum' tool? Message-ID: <20090907083112.GA2787@holstein.holy.cow> In-Reply-To: <44skf0c6zq.fsf@lowell-desk.lan> References: <64c038660909050933h25a91edcw56688993f5557ad2@mail.gmail.com> <44skf0c6zq.fsf@lowell-desk.lan>
next in thread | previous in thread | raw e-mail | index | archive | help
in message <44skf0c6zq.fsf@lowell-desk.lan>, wrote Lowell Gilbert thusly... > > Modulok <modulok@gmail.com> writes: (I am replyin to Lowell's reply for I do not have OP.) > > I'm not even sure such a tool exists, but it's worth asking: > > > > I'm looking for a pseudo-checksum tool for use with catalogging > > images. For example, a strict checksum algorithm, like the sha > > family, will produce a dramatically different checksum for two > > files which differ by only a single bit. I'm looking for > > something where two images images, which are similar, get a > > proportionally similar checksum. When I speak of similarities > > I'm referring to their image patterns. i.e two images of > > differing sizes, which are otherwise identical, would produce > > very similar checksums. So the closer the checksums are, the > > more similar two given images are. > > > > Does anyone know of anything like this? See if this ... http://www.stonehenge.com/merlyn/LinuxMag/col50.html ... fits. - parv --
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090907083112.GA2787>