External edits

fotojenic777

• 2017年09月03日 12:52

A much documented "feature" is that C1 does not allow edits on small files (less than 512 on long side). I have hundreds of small b&W images from my parents that I have scanned but didn't take care in their orientation at time of scan consequently I have loads that I would like to rotate; nothing else just rotate. I know a number of other users on this forum expressed a wish to be able to do DAM style edits; keywords, rotate, description etc.

I have used Preview to rotate a few test images and even with C1 open, once I exit from Preview the images rotate in C1 - result. Can anyone think of any pitfalls I might be creating for myself further down the line?

Ultimately I will raise a ticket with support to be absolutely sure.

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  Ian Wilson

  Moderator

  • 2017年09月03日 13:45

  

  One thing that comes to mind is that you might want to keep a copy of your un-rotated original scans. When you rotate the JPG in preview, it will degrade the quality a bit, as JPG editing does, so having the original in reserve might be worth doing.
  
  Ian

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  fotojenic777

  • 2017年09月03日 14:37

  Thanks Ian, you make a very good point. Enough of a reason to not do it, especially on such small files.

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  fotojenic777

  • 2017年09月03日 14:48

  On a copy I opened it in Preview and rotated and saved it 20 times. Apart from the size changing between a vertical and horizontal orientation there was no discernible degradation of the image. I'm guessing either I'm lucky with this size file or I would need to perform many more orientation changes to have an effect.

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  Permanently deleted user

  • 2017年09月03日 22:31

  Maybe write a rotation tag to the metadata (I don't know how).
  
  The jpeg rotation seems to be a major issue when the resolution is not a multiple of 8.
  
  Here is some theory http://www.impulseadventure.com/photo/l ... ation.html

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  fotojenic777

  • 2017年09月04日 10:08

  Thanks gusferlizi

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