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Permlink Replies: 7 - Pages: 1 - Last Post: Jan 10, 2017 2:59 PM Last Post By: Notjohn
ecktrekor

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dpi's in Createspace
Posted: Jan 9, 2017 2:43 PM
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Help! How do I change my cover image to 300dpi in Createspace. I can change the size, but not the dpi.

Edited by: ecktrekor on Jan 9, 2017 2:44 PM
writerbn

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Re: dpi's in Createspace
Posted: Jan 9, 2017 3:17 PM   in response to: ecktrekor in response to: ecktrekor
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If your original image wasn't at a sufficiently high resolution, then you're going to have to fake the resolution by scaling it using Photoshop or an equivalent app. This will result in a degraded image, however.

As an example, let's say your original image was 1800 x 2700 pixels. That would be sufficient for a 6" x 9" cover at 300 dpi (1800/300 = 6; 2700/300 = 9). There would be no loss of image quality in that situation.

However, if your original image was only 216 x 324 pixels, you would get an extremely degraded image if you scaled it to 6" x 9" because the effective resolution would only be 36 dpi.

Here's a handy calculator that may help: http://www.scantips.com/calc.html
Notjohn

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Re: dpi's in Createspace
Posted: Jan 9, 2017 3:43 PM   in response to: ecktrekor in response to: ecktrekor
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Did you upload a Word doc, or create a PDF from Word? That can result in 200 dpi, which will cause a warning in Createspace. However, I've never been bothered by the results. I currently have a proof coming, one that threw up several warnings, so I may have a different take on this matter by the end of the week.

If there's any doubt, get a physical proof copy so you can see for yourself. The online proof just doesn't do the job.

Assuming you're talking about CreateSpace here. If you're using KDP Print, well, you were warned!

Good luck! -- NJ

The book: Notjohn's Guide to E-Book Formatting (revised and updated for 2017)

The blog: http://notjohnkdp.blogspot.com
Melinda Clayton

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Re: dpi's in Createspace
Posted: Jan 9, 2017 3:47 PM   in response to: Notjohn in response to: Notjohn
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On a side note, if you select to "Print to PDF" from Word instead of Save, you'll preserve your 300 dpi - a trick I just recently discovered.
ecktrekor

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Re: dpi's in Createspace
Posted: Jan 9, 2017 4:49 PM   in response to: Notjohn in response to: Notjohn
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Appreciate the responses to my 300dpi question. Using Gimp, I sized the book cover at 6.25" x 9.50". If I am not mistaken, the default dpi's were set at 72. As Notjohn said, I received a Createspace warning that the image should be 300dpi. I did order a proof copy, which looked O.K. to me, but I would still like to know how to go to 300dpi's using Gimp or picmonkey to obtain the optimum image.

Thanks again

Karl

Edited by: ecktrekor on Jan 9, 2017 4:51 PM
writerbn

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Re: dpi's in Createspace
Posted: Jan 9, 2017 5:11 PM   in response to: ecktrekor in response to: ecktrekor
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Not sure about GIMP, but in Photoshop, it's in the Image menu, under "Image Size". GIMP should be pretty similar.

Keep in mind, as I said earlier, that if you don't have sufficient resolution to begin with, the software will interpolate the necessary pixels (add pixels by using a best-guess algorithm). Createspace won't care, though, whether your pixels are real or manufactured, but the image quality will be lower.

Edit: here you go: https://docs.gimp.org/2.2/en/gimp-tutorial-quickie-scale.html

Edited by: writerbn on Jan 9, 2017 5:12 PM
Alex Ryan

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Re: dpi's in Createspace
Posted: Jan 10, 2017 8:18 AM   in response to: ecktrekor in response to: ecktrekor
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Most of my stock images (my own photos, that is) were low resolution but large in size. I scaled a template in MS Publisher to create a large 22"x17" picture and overlaid 72 dpi photos. They compressed very nicely for both ebook and print book cover purposes.

Both Kindle and KDP Print (and probably Createspace too, but I don't know) don't actually care about DPI, but rather a minimum pixel count and will automatically resize the image preserving the pixel count and correspondingly increasing the DPI in the final product.
Notjohn

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Re: dpi's in Createspace
Posted: Jan 10, 2017 2:59 PM   in response to: Alex Ryan in response to: Alex Ryan
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Print editions rely on dots per inch (dpi). 300 dpi is usually considered the minimum, which is why it is a bad idea to make a PDF from a Word file (which saves by default as 200 dpi). However, I have generally found that images that raise a warning in CreateSpace for being under 300 ppi actually seem quite satisfactory in the printed book.

Don't confuse dpi with ppi, which (ppi) is a matter for digital reproduction. A image at 72 ppi, if large enough in its outside dimensions, will look just fine on a compute screen or a Kindle e-reader. Amazon's help pages aren't much help when it comes to this question. If you upload an image that is 1000 pixels by 1500 pixels, it doesn't matter in the slights (for purposes of an e-book) whether it was scanned as 72 ppi or 300 ppi or indeed 1200 ppi. The image is exactly the same.

But that's not true for print editions. There, the image should be the physical size of the printed image (say 4.5 inches by 6 inches) but scanned at 300 ppi or higher.

Good luck! -- NJ

The book: Notjohn's Guide to E-Book Formatting (revised and updated for 2017)

The blog: http://notjohnkdp.blogspot.com
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