Date: Sat, 5 Sep 2009 11:16:03 -0700 From: Charlie Kester <corky1951@comcast.net> To: freebsd-questions@freebsd.org Subject: Re: Is there such thing as a 'soft checksum' tool? Message-ID: <20090905181603.GA387@comcast.net> In-Reply-To: <64c038660909050933h25a91edcw56688993f5557ad2@mail.gmail.com> References: <64c038660909050933h25a91edcw56688993f5557ad2@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat 05 Sep 2009 at 09:33:03 PDT Modulok wrote: >List, > >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? libpuzzle might be what you're looking for. There's a tool called ftwin that uses libpuzzle to find duplicate or only-slightly-modified files. http://libpuzzle.pureftpd.org/project/libpuzzle http://jok.is-a-geek.net/ftwin.php Both of these are in the portstree. ;-)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090905181603.GA387>