Re: Is there such thing as a 'soft checksum' tool?

2009-09-08 Thread perryh
Mel Flynn mel.flynn+fbsd.questi...@mailing.thruhere.net wrote: On Monday 07 September 2009 05:09:53 Michael David Crawford wrote: M I'm looking for a pseudo-checksum tool for use with M cataloging images. One way you could approach it might be to use a blur filter ... Small differences

Re: Is there such thing as a 'soft checksum' tool?

2009-09-08 Thread Michaël Grünewald
per...@pluto.rain.com wrote: Mel Flynn mel.flynn+fbsd.questi...@mailing.thruhere.net wrote: However, thinking about this inquiry and JPEG in the same sentence has given me an idea that might help the OP: JPEG is a lossy compression, with the degree of loss related to the chosen image quality,

Re: Is there such thing as a 'soft checksum' tool?

2009-09-07 Thread parv
in message 44skf0c6zq@lowell-desk.lan, wrote Lowell Gilbert thusly... Modulok modu...@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

Re: Is there such thing as a 'soft checksum' tool?

2009-09-07 Thread Modulok
Modulok modu...@gmail.com writes: 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

Re: Is there such thing as a 'soft checksum' tool?

2009-09-07 Thread Mel Flynn
On Monday 07 September 2009 05:09:53 Michael David Crawford wrote: M I'm looking for a pseudo-checksum tool for use with cataloging images. I've seen such tools advertised, but they were proprietary products and only worked on windows. One way you could approach it might be to use a blur

Re: Is there such thing as a 'soft checksum' tool?

2009-09-06 Thread Lowell Gilbert
Modulok modu...@gmail.com writes: 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

Re: Is there such thing as a 'soft checksum' tool?

2009-09-06 Thread Michael David Crawford
M I'm looking for a pseudo-checksum tool for use with cataloging images. I've seen such tools advertised, but they were proprietary products and only worked on windows. One way you could approach it might be to use a blur filter to blur each of your images, and then to compare the blurred

Is there such thing as a 'soft checksum' tool?

2009-09-05 Thread Modulok
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

Re: Is there such thing as a 'soft checksum' tool?

2009-09-05 Thread Charlie Kester
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

Re: Is there such thing as a 'soft checksum' tool?

2009-09-05 Thread Karl Vogel
On Sat, 5 Sep 2009 10:33:03 -0600, Modulok modu...@gmail.com said: M I'm looking for a pseudo-checksum tool for use with cataloging images. M For example, a strict checksum algorithm, like the sha family, will M produce a dramatically different checksum for two files which differ by M only a