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Why is it changing my DPI?

Posted: Wed, 25th Nov 2009, 12:01am

Post 1 of 5

TinaC

Force: 400 | Joined: 24th Nov 2009 | Posts: 4

PhotoKey 3 Pro User

Gold Member

So I am importing an image at 2144x1424 @300 dpi. Once I run it through the program and save it, its changing to a 96 dpi file which is NOT suitable for high image printing. How do I get this to not change? The section is greyed out so it will not let me do anything. I set the canvas size to "forground"... I looked back in previous posts but it wasnt helpful... Thanks
Posted: Wed, 25th Nov 2009, 12:52am

Post 2 of 5

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

There does appear to be an oddness in TIFF export that alters the dpi. Its being looked into. It doesn't affect JPG or PNG exports. Bear in mind that it DOES NOT alter the resolution of your image; it just expands the image over a larger area. If you print the exported image at your intended size, the resolution will still be 300 dpi.

For example, if you export an 4x6 image at 300 dpi, your image resolution will be 1200x1800 pixels. The exported image displays at 96 dpi, but this doesn't affect the image resolution, it alters the image size, as the image now appears to be 12.5x18.75 inches, instead of 4x6. So if you print it out at 4x6 the resolution will still be 300 dpi, perfectly acceptable for high quality prints.

If you'd rather avoid the whole issue, then you can export to JPEG, or, if you prefer a high quality format, use PNG. Either way the dpi will stay where it should.
Posted: Wed, 25th Nov 2009, 10:15am

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Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

As Axeman says, if you used PNG or JPG you shouldn't have this problem.

There is a known issue with TIFF images that were are investigating. However, as Axeman correctly states, your image resolution is not being changed at all. As long as you manually set the image to print at 300dpi it should still produce the correct results.
Posted: Sat, 12th Dec 2009, 2:16pm

Post 4 of 5

TinaC

Force: 400 | Joined: 24th Nov 2009 | Posts: 4

PhotoKey 3 Pro User

Gold Member

Thanks I am still skeptical though. I have been removing the backgrounds with photokey and exporting canvas as png to a saved file. When I open it in Photoshop CS3 and go ahead and manipulate & tweak the way I want it by adding my background etc, I review the image size and it says 96 dpi. So you are saying if I change it in photoshop to 300 it will print 300? Because when I initally upload it in Photokey3 it changes the dpi to 96 and the box is greyed out. I am just scared to put this work into my images and then the print quality be horrible.
Posted: Sat, 12th Dec 2009, 7:03pm

Post 5 of 5

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Do you notice that the image size (in inches) is also much much higher in photoshop? The pixel count is still exactly the same. If you change the dpi too 300, and the image size to the size you originally intended, then the actual pixels won't be affected at all. All that changes is the image size, which is currently larger than you intended. We are still wokring on sorting this out.


You are saying that PNG images are changing your dpi? I've only ever seen this with TIFF images, PNG's have always worked perfectly. Are you sure they are PNG files that have this issue?