Save as JPG

there is a TIFF file.
 i can't save as JPG sometimes with Photoshop.
do you know why?
Hiroyuki TamuraField EngineerAsked:
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DVation191Commented:
hiroyuki718,
With the TIF loaded in photoshop, go to Image > Mode ... and change it to grayscale. You should then be able to save it as a jpeg.

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Hiroyuki TamuraField EngineerAuthor Commented:
thanks, DVation191!
is there anyway not change color to grayscale?
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DVation191Commented:
Not that I'm aware of...at least not in Photoshop.
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SlynkyCommented:
Hi, DVation191,

Well, that does seem a bit odd.  I mean, people scan and save as TIFF all the time and output color JPGs, don't they?

Hmmmm...

Regards,
Slynky
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SlynkyCommented:
DVation191,

Yep, I just loaded up a TIF from our Public Affairs office and it allowed me to "Save as" JPG.

So, hiroyuki718, do you get an error message when it does not work right?  Or is the option to "Save as JPG" NOT there?  What version of PS and operating system, please?  And, can you think of anything that might be different about the TIFF files that DO save as JPG (from the TIFF files that do NOT save as a JPG)?

Cheers!
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DVation191Commented:
It has to do with the mode you are working in. Slynky, if you took that TIF that you are able to save as a jpeg and change the mode to bitmap, the jpeg option will be gone...at least it does on my copy of Photoshop CS
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SlynkyCommented:
DVation191,

-> It has to do with the mode you are working in. Slynky, if you took that
-> TIF that you are able to save as a jpeg and change the mode to bitmap,
-> the jpeg option will be gone...at least it does on my copy of Photoshop CS

Yes, that's true. But the questioner asked why he could save some TIFFs as JPG and not other TIFFs as JPG.  The fact that I can do it from TIFF to JPG and the questioner can do it sometimes indicate it IS possible.  What really needs to be fixed is finding out why some and others not.  

I only popped in because it looked as if the questioner was being led to believe the only way to save a TIFF to JPG was to convert it to greyscale and that's not the case.

Cheers!
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DVation191Commented:
Well there are differences between tiffs. For instance, open up any file and try to save it as a tiff...you'll be prompted with various compression and color methods. As to which one actually makes it so its not in bitmap mode when it opens is beyond my expertise. The tiffs he and I are both opening are indeed valid tiff files...therefore nothing is "wrong" per se, I'd me more apt to blame Photoshop for requiring the image mode be specific when saving as jpeg.
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SlynkyCommented:
DVation191,

"Well there are differences between tiffs. For instance, open up any file and try to save it as a tiff...you'll be prompted with various compression and color methods. As to which one actually makes it so its not in bitmap mode when it opens is beyond my expertise. The tiffs he and I are both opening are indeed valid tiff files...therefore nothing is "wrong" per se, I'd me more apt to blame Photoshop for requiring the image mode be specific when saving as jpeg."

And here, we agree, I think.  Which is the reason I asked the questioner if there might be some difference in TIFF files that he might think of.  Like, where they came from or how they were created.  

I don't claim to be extremely knowledgeable on graphic formats but if I can save a CMYK TIFF to JPG (with no other mode changes), then, to me, it's possible.  And if not, as you suggest, something in SOME of the TIFFs he works with is preventing it.  Figuring out what that is, is the real puzzle, I think, even IF Photoshop is being...well...overly strict (smile).  

Perhaps posting an image he CAN save as a JPG versus one he CANNOT save as a JPG might be a start to solving it (if possible).

Best regards,
Slynky
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lherrouCommented:
hiroyuki718,

Here's why: TIF supports layers. Photoshop will not save a layered TIF as a JPEG using Save As, only by using Save for Web. If you convert the image to BMP, the layers are lost, and you can Save As in a JPG format. You can also go to Layer -> Flatten and then once the layers are gone, you can "Save As".

Cheers,
LHerrou
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Hiroyuki TamuraField EngineerAuthor Commented:
thank you, all:)
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