Hi Gilly Glad to be of help. The other thing you need to consider when using JPGs is compression. You often need to reduce file size (say for uploading purposes). If you compress the image too much you'll get unfortunate "artifacts" in the image. It's best practice to keep the original image and work on a copy, then you can always go back and do it again if you have a problem. And finally always keep the colour space to sRGB (or AdobeRGB 1998) – you won't normally ned to convert it to CMYK. Cheers Derek
On 6 Dec 2012, at 12:41, Gillian Snoxall <[email protected]> wrote: > Thank you so much, Derek! You have gone to a great deal of trouble to answer > my question – and have certainly taught me a lot. I do appreciate your help. > > Gilly > > > > On 6 Dec 2012, at 12:25, Derek Cross wrote: > >> Regarding image resolution, rule-of-thumb – for commercial printing, allow >> 300 pixels per inch (PPI)) . This allows two pixels per line screen. For >> inkjet printing you can come down to lower resolutions - maybe 200 PPI. >> >> To work out the optimal size you can print divide the image's pixel >> dimensions by the proposed PPI. In the above example, dividing 2804px by 300 >> and 2035 by 300 = 9.34inchs x 6.78 inches (237 172mm). As A5 is 210 x 172 >> this would be adequate for an A5 print and would probably scale up to A4 >> satisfactory. >> >> Derek >> >> >> On 6 Dec 2012, at 10:35, David Ransom <[email protected]> wrote: >> >>> Hi Gilly, >>> >>> I would say that it would print at good quality at about A5 size and >>> probably still acceptable at A4, depending of course on the quality of the >>> photograph. >>> >>> David >>> >>> >>> On 6 December 2012 10:30, Gillian Snoxall <[email protected]> >>> wrote: >>> Can anyone tell me what is the maximum size photo I could have printed from >>> the image described below? >>> >>> [see attached file: Screen Shot 2012-12-06 at 10.23.17.png] >>> >>> Gilly >>> >>> > > > -- > You received this message because you are subscribed to the Google Groups > "Sussex Mac User Group" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/smug?hl=en-GB.
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