Derek and Sam, Thank you so much for your incredibly helpful replies.
Sam, before I take up your time by sending the image to you, perhaps you or Derek could roughly estimate whether or not what I want to do is possible: My image is 794 x 595 pixels. I would like to have it printed on canvas to a size of 40" x 30". Would it be possible to improve the quality to that extent – or is that asking too much? Would really appreciate your advice. Best regards, Gilly On 14 Jan 2012, at 12:34, Derek Cross wrote: > 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. -- 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.
