Comments on: Reader questions and comments re: JPEG http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/ Mon, 01 Aug 2011 02:29:37 +0000 hourly 1 http://wordpress.org/?v= By: eckenheimer http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/comment-page-1/#comment-307 eckenheimer Fri, 17 Aug 2007 19:45:00 +0000 http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/#comment-307 In my previous comment, I should have added that if saving any image long term in jpeg format, you need to keep an "original" which is never altered and make any changes only to copies of it. This is because, as Sally correctly pointed out, each save after a change to a jpeg image degrades its quality slightly. Sorry I omitted that critical bit of information. <br/><br/>As for the format falling out of favor, that is a hazard that plagues all digital formats. I have no idea which image formats will exist in ten years, and wouldn't bet money on which current formats will still be useable five years from now. In my previous comment, I should have added that if saving any image long term in jpeg format, you need to keep an “original” which is never altered and make any changes only to copies of it. This is because, as Sally correctly pointed out, each save after a change to a jpeg image degrades its quality slightly. Sorry I omitted that critical bit of information.

As for the format falling out of favor, that is a hazard that plagues all digital formats. I have no idea which image formats will exist in ten years, and wouldn’t bet money on which current formats will still be useable five years from now.

]]> By: Sally J. http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/comment-page-1/#comment-302 Sally J. Tue, 14 Aug 2007 02:58:00 +0000 http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/#comment-302 You're right, Denise -- that was GIF. <br/><br/>There's a <a HREF="http://en.wikipedia.org/wiki/Gif" REL="nofollow">wikipedia entry</a> that explains what happened. You’re right, Denise — that was GIF.

There’s a wikipedia entry that explains what happened.

]]> By: Moultrie Creek http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/comment-page-1/#comment-299 Moultrie Creek Sun, 12 Aug 2007 20:41:00 +0000 http://practicalarchivist.com/reader-questions-and-comments-re-jpeg/#comment-299 Great discussion! I seem to remember years ago there were some issues about patents or something for one or more formats (GIF maybe?). What kinds of strings are attached to the various formats and how does that affect us? Great discussion! I seem to remember years ago there were some issues about patents or something for one or more formats (GIF maybe?). What kinds of strings are attached to the various formats and how does that affect us?

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