Strange behaviour of thumbnails when importing .jpg files

Le_Lion_07

• 2011年11月01日 08:11

Hello from France.

The problem (Media Pro 1.1 and Windows 7) : when importing .jpg files, all thumbnails are in horizontal position, including the ones from photos which were shooted in vertical position (the option "Use the integrated thumbnails" is unchecked).

But if I look at the thumbnails in W7 explorer, they are (sometimes) also wrong. I think this comes from Adobe Bridge because if I rotate a photo directly in Photoshop, there is no problem.

So, I rotate the wrong thumbnails with W7 explorer (right clic > rotate). Then coming back to Media Pro, I select one of these photos and I regenerate the thumbnail. Result : the thumbnail appears inverted (up/down) ! I must say that I never had any problem like this with Expression Media.

I know this problem concerns the database only, not the photos themselves, but is there a solution to resolve it ?

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  Jason821

  • 2011年11月01日 12:54

  This looks to be connected to my post below: Jpeg orientation on import.
  
  The Windows viewers have never been able to read and apply the metadata which tells them to display an image in the vertical format. Viewers such as Nikon View and Capture1's own file browser do. Note that there's a difference between having metadata telling the viewer to rotate the view by 90 degrees upon display, and destructively altering the pixels to rotate an image through 90 degrees. It may or may not be the case any more with W7, but it certainly used to be, that rotation using windows picture viewers would do the latter and there was a warning to that effect.
  
  What appears to be happening is that MP doesn't always understand the metadata telling it to display in portrait format unless the image is processed somehow. In your case, you are rotating by transposing pixels in windows, through 90 degrees, and then MP takes this and applies the metadata rotation instruction (which it had previously ignored), and rotates through another 90 degrees, giving you an upside-down image.
  
  If I take a portrait-format jpeg which is straight from the camera, programmes such as NV, C1, Lightroom, etc. will display it properly, yet MP displays the thumbnail on its side in landscape format. MP is clearly ignoring the rotation metadata which other programmes apply correctly.

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  Le_Lion_07

  • 2011年11月01日 17:01

  Thank you for these informations.
  
  After deleting all the "wrong" pics from the MP catalog, then reimporting them, all was right.

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