Photo dpi

[mfatty500]

How do I check to see of the photo has enough dpi, if the photo came from an iphone? I'm reading that i need more than 200 dpi to print to keychains etc. It is already 261 dpi? I'm confused. I'm using X3 and photo-paint. And what steps do I take to correct it.
Thanks
Mike

[galerion]

I have my mug template set to 300 dpi and tend to think anything under 7 megapixel is going to not look all that good, as a rule of thumb if you need to stretch the image to fill your template then its a bad image if you need to shrink it then its a good image.

[pisquee]

It's not just the dots per inch that matters, that's only half the story, as the amount of dots that's also important, as the two are relative.
Ideally you want images supplied to be the correct size and at 300dpi.

Or, you could have an image which is half the size, but 600dpi, or double the size and 150dpi...

Set up a template for the size of the item you want to print, and then load in the image... if it is at least the same size - i.e fits or is bigger then you're fine. If it's a lot smaller then try scaling it up - you may get away with it, or it may look rubbish.

You can always do test prints on a normal paper printer before wasting sublimation blanks first.

[logobear]

It is very easy to get hung up on this, I have a booklet printed with examples right down to 10dpi so clients can make their own assessment of what THEY think is acceptable quality.
Find the total number of pixels in the image, and divide by the length of the item in inches.
In my experience clients are a lot less critical than us printers.......and generally think 100dpi is acceptable, and often a lot less....
so if a phone is 6inches high, then for 100dpi you need 600pixels.
In actual fact it is very difficult to appreciate any resolution above 200dpi, which is why 300dpi is considered professional.

[dazzul]

I did once do a set of phone cases with the same image just at different DPI to show people, most didnt give monkeys.

Mind you the only time i will print less then 300dpi is on phone cases, i print everything else at 300dpi

[logobear]

what you print at, and what resolution the image is can be 2 very different things ......

[mfatty500]

Thanks for the replies

[mfatty500]

Then when I go print I get the "issues" window saying it is under 96 dpi, I then convert to bitmap and select 300 dpi and then it will have no issues, and then I print.

[galerion]

If you open a new doc choose your width, hight and set your resolution to 300 pixels/inch. Then open the pic you want to use copy it go back to the new doc and past as a new layer now you scale as needed. If your doing that already then I don't know why you would get that message. Here's a example of a low res picture on a 300 dpi mug document [ATTACH=CONFIG]2554[/ATTACH] see it is really small vs the document if I was to use the pic tool to stretch it out it would look crappy when printed if it had been from a 10 megapixel camera the picture would be bigger than the mug doc and I would need to use the pic tool to scale it down but it would look good when printed.

[mfatty500]

Are you doing this in photo-paint or X3, or does it matter?