.jpg size issue from PS CS

[chad]

I'm working with a .jpeg in Photoshop CS and am having a size/resolution change depending on what mode i'm in(rgb/cmyk). The problem I keep running into is for some reason when saving a cmyk bitmap it sizes the image to 72 ppi and increases the over all size.

EX. image is cmyk 12 x 12 @ 100ppi in PS CS.
I open in Postershop for printing and it's now 16.667 x 16.667.

So I opened it in Corel Draw and Photopaint to double check and its now 16.667 x 16.667 @ 72 ppi, as it was in postershop. I then opened it in PS CS to check and its still the original 12 x 12 @ 100.

Now, If I repeat the above but make it an RGB image, the size is not changed at all in any program. The problem with that is I can't use an RGB image for what i'm doing.

Has anyone had this issue or know of a way to resolve it so that I can save a CMYK .jpg and have it open at the proper size/resolution in my other programs?

[Broacher]

Ze problem is... until, I think it was, Photoshop 6, there wasn't anything in a jpg file that told an app what resolution it was intended to be, Adobe added something to their JPG header tags that embeds the 'intended' resolution, only, but just Adobe products pick this up.

It's not that difficult to work around though. It's not as if you're losing any actual resolution, it's just the size. If you plae a JPG into CorelDraw it'll come automatically in at 72 ppi and bigger than if you did, say, in AI or ID. But what's the big deal about resizing it manually? In Corel, you can click the 'Resample Bitmap' button, lock the file size, and dial in the new resolution. The image will shrink to fit a higher res, and you won't lose a pixel of info. If you do a lot of these, just assign a shortcut key to this function, or go one more and make it a macro.

Or, if you're lazier, like me-- you can just drag the image down and keep an eye on the status bar which gives you the effective resolution as well as the colour space of the image you're working on.

[chad]

Yes, that is what i've been doing. Going into corel isn't really a big deal, but it's more of an issue with Postershop as it doesn't tell you a resolution. I can work around it fine, but when/if I'm not here and someone else comes in to do a job we've previously produced they're gonna be working at the wrong size if they just run the file with out the job tickets, which happens more than it should. Guess it serves them right for cutting corners. haha.

Thanks.