116 dpi & 44 dpi...

[FGPhotography]

I need some advice... or, education on this matter.. lol

I am printing a 11"x8.5" Hard cover photo book from Mpix.com and it alerted me that a few of my background images are low quality (They're zoomed in on, the one's the program is concerned about)... Now, I've made an album before where it'd given me a low res warning (Mac), but printed beautifully... So, what does this potentially mean for the album? Should I look at changing them, or do you think it'll be okay?

Here's the album: Wedidng Album

and the pages i'm getting a warning about are pages:
6
7
8
9
10
11
14
15
40
and 41

It's telling me the images are 116 dpi & 44 dpi...What do you think? I want to send this album in this evening/tomorrow morning.... Your help is greatly appreciated! Thank you!

[RecurrentNerve]

True print resolution is 300dpi, anything less than that and the image will be pixellated. You won't be able to see this on screen because screen resolution is 72dpi. How you managed to get a 44dpi image I don't know!

You may find that images straight out of your camera show in software as 72dpi. However, it will also be huge dimension-wise, so you can resize it to 300dpi at a useable size.

[teaking]

I have read alot of conflicting evidance on printing and resolutions it depends on the machine used a normal inkjet printer 116dpi would probably look terrible, how ever on a high end lab or laser machine the same 116dpi image could look good. The general rule of 300dpi is for inkjet and commercial print runs. The distribution of ink on paper is not the same as pixels on a screen which is what high end machines take advantage of.

This is an interesting extract from the cambridge in colour site:
"If we take your 250 dpi and if we assume that that 25.4 millimeters per inch is actually close enough to 25 millimeters per inch then 250 dpi would equate to (250 / 25) = 10 pixels per linear millimeter or 10 x 10 = 100 pixels in a single square millimeter. Could your eyes resolve ONE HUNDRED tone changes in a single square millimeter? (mine neither - and probably not even with a magnifying glass) ... especially at normal viewing distances."

The 44dpi image I probably wouldnt touch how ever the other image may be ok its more about the quality of the file than the resolution (up to a point). Its all down to personal preference and your standards.

[OsmosisStudios]

Originally Posted by RecurrentNerve

True print resolution is 300dpi, anything less than that and the image will be pixellated. You won't be able to see this on screen because screen resolution is 72dpi. How you managed to get a 44dpi image I don't know!

No.

300DPI is standard print resolution, but you wont notice anything till about 75 or so. Even then, it'd have to be a rather large print and a rather close examination.

[RecurrentNerve]

300DPI is standard print resolution, but you wont notice anything till about 75

In which case why is the standard 300?

[teaking]

The 300 is standard because it dates back to pre-press printing and 4 colour print runs and even screen printing they all required resolutions of around 300 to give optimum quality. But now with newer machines this is less of a problem it all depends on what you are having printing and the print process, with screen printing you probably do still need high resolution images... but with photographs not so much if you want to be safe use 150-200PPI/DPI as a ball park figure but like "Os" said even 75PPI/DPI can give good.

[FGPhotography]

Thank you everyone, I did all I could to try and bump the DPI up a bit before i sent the book off... I got it back today and it turned out perfect!!! I faded that particular background image so if it did come back pixilated it wouldn't be to huge of a deal, but it didn't come back pixilated at all thank goodness!!!! =) Thank you all again for all your help =) and education!