Q: i am creating an album in photos. On some photos there is a small triiangle which says low resolution or the photo is zoomed too m ... more
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May 11, 2016 6:43 PMby LarryHN,By album do you actually mean a Photo Photo Book?
If so then those photos will not be optimal quality in the printed book - that warning comes on at either 150 DPI or 180 DPI ( there is some discussion of which and I have not seen Apple issues an exact statement on it_ - but either is pretty much the lower range for really good quality - as to the final results that depends on the pixel dimensions of the photos and the size of the final print - a 140 DPI image is still going to look fine to most people - a 50 DPI image will not look good to very many people
Going ahead or not is your choice - you should preview using this method - Preview a print project in Photos or iPhoto to avoid issues - Apple Support
I probably would not order one with any photos that are less than 130 DPI or so - unless they were critical to the book and could not be printed smaller
LN
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May 12, 2016 6:23 AMby hprin1012,Thank you for your reply. Yes, I did mean a Photo Photo Book... Apple has changed the terminology only making it more confusing for us oldies! I am not familiar with DPI's... I just take the pictures wth my Canon camera and iPhone , upload them to my computer and then place them in the album (photo photo book). I did preview the photo book ( i created a PDF file) and as I said in my original query the photos looked fine there and showed up just as I have them on my computer. How can I check on the DPI's of a photo and /or make the necessary changes so that the print version will be ok?
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May 12, 2016 6:51 AMby LarryHN,DPI - Dot (or pixels) per inch
Take the pixel dimension of the image and divide by the inched of the printed Photo - that gives you dots per inch
300 or more is excellent -- 200 to 300 is good - 150 to 200 is ok - 100 to 150 may be acceptable to some - below 100 is ppoor and should be used only if there is no alternative
so is a print is going to be 8"x10" it needs to be at least 1200x1500 pixels and 2400x3000 is better
LN
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May 12, 2016 8:31 AMby Old Toad,These are the dpi preferences for an iPhoto 9.6.1 book:
What Apple uses for Photo is still a mystery as they are not included in the Photos preference file as they are in iPhoto's preference file. The best we can do is assume it's the same for Photos and base your judgement to use or not use a photo on the figures above as well as how you think they look.
