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Forums Lobby MASTER YOUR NIKON CAMERA Nikon D5000/D3000 series (Public) topic #1317
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Subject: "RE: JPG vs RAW, and simple editing RAW" Previous topic | Next topic
JosephK Silver Member Fellow Ribbon awarded for his excellent and frequent contributions and sharing his in-depth knowledge and experience with the community in the Nikonians spirit.   Seattle, WA, US  Nikonian since 17th Apr 2006 Sat 13-Feb-10 10:17 PM
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#7. "RE: JPG vs RAW, and simple editing RAW"
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>JPEGs are compressed files that uncompress when you view them and
>them recompress when they are closed. Like a spring, they
>eventually deteriorate over time.

This is incorrect. Opening and closing the JPG files is not a problem. You are just reading and uncompressing the same data over and over with no changes to that data.

The "damage" happens when you change the data and save the data back to disk as a JPG. It is the saving that does another round of destructive compression. It is the repeated cycle of open-edit-save-close that is bad for jpg files. You can do open-close forever with no loss of data.

The advantage of TIF and other losslessly compressed files is that the edit-save loop can be repeated with no data loss.

---------+---------+---------+
Joseph K
Seattle, WA, USA

  

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A general, generic topicJPG vs RAW, and simple editing RAW [View all] , xjermx , Thu 11-Feb-10 12:43 AM
 
Subject Author Message Date ID
Reply message RE: JPG vs RAW, and simple editing RAW blw Moderator Awarded for his high level of expertise in various areas
11th Feb 2010
1
Reply message RE: JPG vs RAW, and simple editing RAW nateccnn
13th Feb 2010
2
Reply message RE: JPG vs RAW, and simple editing RAW MEMcD Moderator In depth knowledge in various areas
13th Feb 2010
3
Reply message RE: JPG vs RAW, and simple editing RAW Donald Kahn
13th Feb 2010
4
Reply message RE: JPG vs RAW, and simple editing RAW nateccnn
13th Feb 2010
5
Reply message RE: JPG vs RAW, and simple editing RAW Donald Kahn
13th Feb 2010
6
Reply message RE: JPG vs RAW, and simple editing RAW JosephK Silver Member Fellow Ribbon awarded for his excellent and frequent contributions and sharing his in-depth knowledge and experience with the community in the Nikonians spirit.
13th Feb 2010
7
     Reply message RE: JPG vs RAW, and simple editing RAW Donald Kahn
14th Feb 2010
9
Reply message RE: JPG vs RAW, and simple editing RAW xjermx
14th Feb 2010
8
Reply message RE: JPG vs RAW, and simple editing RAW nateccnn
14th Feb 2010
10
Reply message RE: JPG vs RAW, and simple editing RAW rectangularimage Silver Member
16th Feb 2010
11

Forums Lobby MASTER YOUR NIKON CAMERA Nikon D5000/D3000 series (Public) topic #1317 Previous topic | Next topic