Comments on: Image resolution and DPI explained

By: Photoshop Ninja

Photoshop Ninja — Thu, 04 Mar 2010 22:52:27 +0000

Strange – maybe try saving them down in a different format, the size shouldn’t be a problem. TIFF would be worth a try.

By: Khaliah

Khaliah — Thu, 18 Feb 2010 16:02:00 +0000

I’m having a bit of an issue with some files I have on Photoshop Elements 8.

For a project, I’m told that the finalized pieces need to be 600 ppi. I have no problem with that, and scanned them in at that resolution. I touched them up in Photoshop, and now, each one is around 10 MB or so.

For some reason, they won’t print. Both I and my client attempted printing them, but they won’t print. Are the file sizes too big?

By: Photoshop Ninja

Photoshop Ninja — Fri, 15 Jan 2010 14:51:54 +0000

To clarify (hopefully!) – when you are working in Photoshop and dragging images from one document to another, dpi has no relevance – think in pure pixels. So you may have one document that’s setup to 10inches x 10inches at 150dpi (1500 x 1500 pixels), and another document that’s setup to 10inches x 10inches at 300dpi (3000 x 3000 pixels). If you drag a layer from the first document (150dpi) into the second document (300dpi), the layer would be exactly half the size in pixel dimensions in relation to the overall document size. You can see that although both images are set to print to 10in x 10in – the first will output to 150dpi and the second will output to 300dpi (that’s where all those extra pixels go… resolution/quality of image!).

On resampling – when chaging the dpi of an image, untick this box. You then will no physically resize the image (unless you really want to do that of-course!).

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By: Andrè

Andrè — Thu, 10 Dec 2009 16:37:19 +0000

But lets say u make a design in photoshop by dragging different images into one which is 72dpi, and the images have different dpis, this means only they will appear bigger in the 72dpi design when dragged in right? so most of the times u will have to shrink it to fit the design….but when doing this and then sending it to print, lets say the design made in 72dpi is gonna be printed in a3, then it wouldnt be worse quality? as long as the images used has clearity and u dont enlarge them when designing right?

It is always prefereable to have high dpi project from beginning but then the pictures have to be high dpi too otherwise they would appear wery small(72dpi) to get same clarity as the 300dpi images is this right?

lets say you design a project in 300dpi a3, then a good quality picture in 300 dpi would take same space as 4 pictures in 75dpi right? but the 75 dpi pictures could have just as much clarity as the 300dpi picture as long as they where their original small size? and if using 75dpi pictures I could just as well design in a 75dpi photoshop project and get just as good quality? or would always 300dpi project setting give higher print quality?

Also after reading this I noticed some of my finished projects where in 72dpi and I tried settting to 300dpi with resampling off, if I had printed this out again would I get a better quality print?