Comments on: Find and delete duplicate pictures on your computer http://computertutorflorida.com/2010/07/find-and-delete-duplicate-pictures-on-your-computer/?utm_source=rss&utm_medium=rss&utm_campaign=find-and-delete-duplicate-pictures-on-your-computer Computer repair, personal computer instruction in Safety Harbor, Clearwater, Tampa, St Pete Tue, 07 Feb 2012 14:24:19 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Tweets that mention Find and delete duplicate pictures on your computer | Applications | Computer repair, personal computer instruction in Safety Harbor, Clearwater, Tampa, St Pete -- Topsy.com http://computertutorflorida.com/2010/07/find-and-delete-duplicate-pictures-on-your-computer/comment-page-1/#comment-682 Tweets that mention Find and delete duplicate pictures on your computer | Applications | Computer repair, personal computer instruction in Safety Harbor, Clearwater, Tampa, St Pete -- Topsy.com Mon, 05 Jul 2010 16:57:40 +0000 http://computertutorflorida.com/?p=2179#comment-682 [...] This post was mentioned on Twitter by Scott Johnson, Chris Baltzley. Chris Baltzley said: Thanks, this was REALLY helpful RT: @pctutor Find and delete duplicate pictures on your computer http://goo.gl/fb/zlPm4 [...] [...] This post was mentioned on Twitter by Scott Johnson, Chris Baltzley. Chris Baltzley said: Thanks, this was REALLY helpful RT: @pctutor Find and delete duplicate pictures on your computer http://goo.gl/fb/zlPm4 [...]

]]> By: J G http://computertutorflorida.com/2010/07/find-and-delete-duplicate-pictures-on-your-computer/comment-page-1/#comment-681 J G Mon, 05 Jul 2010 16:14:30 +0000 http://computertutorflorida.com/?p=2179#comment-681 The commentary above didn't make it clear that this program (and some others) actually compare the look of the images rather than the bit by bit content of the files to determine if 2 images are the same (or nearly so). There are many programs that do bit by bit comparisons to find identical files. True image comparison programs characterize the file in some (usually proprietary) manner then compare the signature files. This allow comparison of different size files; files with different color characteristics; border treatments; embedded text; etc and still find duplicates. These programs also take a lot of time to find dups in a large group of files. Since every file must be compared with every other file processing time goes up with the square of the number of files involved. Some other programs in this genre are Picture Relate and DupDetector. VisiPics is the best of the free/low cost lot however. The commentary above didn’t make it clear that this program (and some others) actually compare the look of the images rather than the bit by bit content of the files to determine if 2 images are the same (or nearly so).

There are many programs that do bit by bit comparisons to find identical files. True image comparison programs characterize the file in some (usually proprietary) manner then compare the signature files. This allow comparison of different size files; files with different color characteristics; border treatments; embedded text; etc and still find duplicates. These programs also take a lot of time to find dups in a large group of files. Since every file must be compared with every other file processing time goes up with the square of the number of files involved.

Some other programs in this genre are Picture Relate and DupDetector. VisiPics is the best of the free/low cost lot however.

]]>