Questions888
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Q: iphoto low quality pictures

I'm making a photobook and it says a few of my pictures may print at a lower quality. I'm just wondering what lower quality means: its a little pixelated or completely blurry. Any suggestions?

iPhoto '08, iOS 7.0.4

Posted on Dec 14, 2013 10:00 AM

by LarryHN,Solvedanswer
LarryHN LarryHN
Level 10 (85,668 points)
Photos for Mac
A:

You can create a PDF of the book according to this Apple Document and check it to see if the image will meed your expectations: iPhoto, Aperture: Previewing an order in iPhoto or Aperture

Not actually a good test as a 72 DPI image looks perfect on a display screen but prints terrible - best to go by actual printed DPI rather than screen display since a screen is a totally different anminal and both colors and resolution work completely differently for screens

 

Apple's suggested minimum pixel dimensions for disserent size prints are in the link I provided

 

doing the calulation I recommended is the best idea

 

the basic rule is that photo smust be 150 DPI or more for good prints - so you divide the pixels in each dimension by the inches being printed in that difection - if the answer is 149 then things should be fine - it is is 25 then things will be very bad

 

LN

Posted on Dec 14, 2013 10:21 AM

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Q: iphoto low quality pictures

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  • by LarryHN,

    LarryHN LarryHN Dec 14, 2013 10:10 AM in response to Questions888
    Level 10 (85,668 points)
    Photos for Mac
    Dec 14, 2013 10:10 AM in response to Questions888

    How high is up?

     

    It means that it may print at a lower quality - it may be a little pixelated or a lot pixelated

     

    How much totally depends on the pixel size of the photo and the physical size of the print

     

    http://support.apple.com/kb/TS1135

     

    the basic rule is that photo smust be 150 DPI or more for good prints - so you divide the pixels in each dimension by the inches being printed in that difection - if the answer is 149 then things should be fine - it is is 25 then things will be very bad

     

    LN

  • by Old Toad,Helpful

    Old Toad Old Toad Dec 14, 2013 10:15 AM in response to Questions888
    Level 10 (141,679 points)
    Photos for Mac
    Dec 14, 2013 10:15 AM in response to Questions888

    What are the pixel dimensions of the pictures giving that warning and what size frame are they in? According to iPhoto's preference file the warning occurs in iPhoto 7 (08) if the resulting dpi falls below 180 (BookWarningImageDPI). 

    iP7dpi.PNG

     

     

    You can determine what size image will be at the cutoff  by dividing the pixel dimensions of the image by 140. 

     

    So if you had a 1600 x 1200 image the size would be around 8.8" x 6.6".

     

    You can create a PDF of the book according to this Apple Document and check it to see if the image will meed your expectations: iPhoto, Aperture: Previewing an order in iPhoto or Aperture

     

    Happy Holidays

  • by LarryHN,Solvedanswer

    LarryHN LarryHN Dec 14, 2013 10:21 AM in response to Old Toad
    Level 10 (85,668 points)
    Photos for Mac
    Dec 14, 2013 10:21 AM in response to Old Toad

    You can create a PDF of the book according to this Apple Document and check it to see if the image will meed your expectations: iPhoto, Aperture: Previewing an order in iPhoto or Aperture

    Not actually a good test as a 72 DPI image looks perfect on a display screen but prints terrible - best to go by actual printed DPI rather than screen display since a screen is a totally different anminal and both colors and resolution work completely differently for screens

     

    Apple's suggested minimum pixel dimensions for disserent size prints are in the link I provided

     

    doing the calulation I recommended is the best idea

     

    the basic rule is that photo smust be 150 DPI or more for good prints - so you divide the pixels in each dimension by the inches being printed in that difection - if the answer is 149 then things should be fine - it is is 25 then things will be very bad

     

    LN

  • by Old Toad,Helpful

    Old Toad Old Toad Dec 14, 2013 10:53 AM in response to LarryHN
    Level 10 (141,679 points)
    Photos for Mac
    Dec 14, 2013 10:53 AM in response to LarryHN

    If you view the PDF at Acutal Size you cab get an idea of what the pixelation/blurriness will be.

  • by Questions888,

    Questions888 Questions888 Dec 14, 2013 11:14 AM in response to Questions888
    Level 1 (0 points)
    Dec 14, 2013 11:14 AM in response to Questions888

    i previewed the book as a pdf and blew up the pictures... some are a little pixilated but i can deal... thanks for your help