Rule of thumb, allow 300ppi (pixels per inch) for good quality prints, though you can get away with 200ppi. That means if you want to print a photograph to say 5 inches by 7 inches, you need a pixel dimension of 1500px x 2100px (300 x 5" by 300 x 7").
There are a number of programs, including Photoshop, and plugins such as onOne's Perfect Resize, that can increase the pixel dimensions by interpolating (sampling) the surrounding pixels. How successful this will be will depend on the size and the quality of the original photograph and the amount of enlargement. The process tends to soften the image so a little subsequent sharpening using (funnily enough) the unsharp filter in Photoshop will help. Derek On 13 Jan 2012, at 22:15, Gillian Snoxall wrote: > Fantastic, Sam! That would be wonderful. I'll research the requirements and > get back to you. > > Regards, > > Gilly > > > On 13 Jan 2012, at 18:35, Sam - MacAmbulance wrote: > >> Hi Gilly >> >> You can resize the image in Photoshop so that it's larger. Did they give you >> a size that it should be? >> >> I know someone who uses PerfectResize, a plugin for Photoshop, to upscale >> images. It's quite good at interpreting the quality. If you send me the >> image I can ask them to size it up to whatever the website requires. >> >> Regards >> >> Sam >> MacAmbulance >> Providing affordable Apple & PC services >> >> Sam Mullen >> 07747 778022 >> http://www.macambulance.co.uk >> [email protected] >> > > > -- > 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. -- 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.
