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Rotating photos in PS?
Old 11-20-2006, 04:13 PM   #1 (permalink)
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is there a way to batch rotate photos in photoshop? I can do it with windows but i've been told that that can harm the image? Anyone got a suggestion?
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Re: Rotating photos in PS?
Old 11-20-2006, 04:28 PM   #2 (permalink)
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If you have the Bridge in CS2, you can hilight the files and batch rotate. This also does not afect the actual file. Not sure about earler versions.

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Re: Rotating photos in PS?
Old 11-20-2006, 04:30 PM   #3 (permalink)
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Quote:
Originally Posted by Titan View Post
is there a way to batch rotate photos in photoshop? I can do it with windows but i've been told that that can harm the image? Anyone got a suggestion?
Sort of a vague question, but if you are asking how you can rotate a group of JPGs in a batch and do it losslessly, then, while it can be done in PS, you'll find it easier in a program like Breezebrowser that has a lossless rotation process that is designed for batch use. If you rotate an image in PS or by any process that does not know about lossless rotation, then you are degrading the image a bit.

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Re: Rotating photos in PS?
Old 11-20-2006, 04:50 PM   #4 (permalink)
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Note: Keep in mind that only when rotating JPG photos does this question of degrading or damaging the images arise. Other formats such as tif, psd, etc., do not have this issue. There are several batch methods in different versions of Photoshop and Bridge that will let you rotate images, but when dealing with JPGs there may be an issue of the degrading process.

Technical Note: The reason that rotating a JPG degrades an image is because when you save the image, it is recompressed and since JPG is a lossy format more information is thrown away each time you save as JPG. The usual way to work with images that start as a JPG (such as from a camera) is to save out a working copy in PSD or TIf and then you can do whatever you want and never lose any further data. When you then convert it back to JPG for posting to the web, you'll have the maximum info available.

Further Note: If you do lots of Photoshop work and you find that your photos normally need Photoshop work to make them their best, then you should consider shooting RAW where you will have the maximum data. You then do your rotate in the RAW converter (and this can be batched) and their is never any question of data loss.

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Re: Rotating photos in PS?
Old 11-20-2006, 05:10 PM   #5 (permalink)
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Excellent, thanks for the advice.
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Re: Rotating photos in PS?
Old 11-20-2006, 08:01 PM   #6 (permalink)
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That brings up a question,...I have rotate selected on my D20, so if I shoot jpg is there a loss of data?
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Re: Rotating photos in PS?
Old 11-20-2006, 11:31 PM   #7 (permalink)
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Quote:
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That brings up a question,...I have rotate selected on my D20, so if I shoot jpg is there a loss of data?
No, because the camera is actually rotating the image based on the RAW data and then saving it to the card as a JPG.
Keep in mind that prior to the image being saved to the card, it is in a basically RAW data format in the camera's internal memory.
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Re: Rotating photos in PS?
Old 11-20-2006, 11:36 PM   #8 (permalink)
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Good to know,..thanks RFS.
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