Printing on A0 size

[Rense]

Yesterday I saw an advertisment for printing on A0 size for Eu. 40,--
A0 means that the papersize will be:
Height 1189mm x Width 841mm or in inches (46.81 x 33.11)

If I want to print a photo taken on the 20D (3504px x 2336px) with a resolution at 300dpi on this paper size, I would need an enlargement of about 4 - 5 times.

I'm afraid of introducing pixelation, so my question is:

Has anyone done this before and how did you proceed ?

[Nightcrawler]

You could take a look at Genuine Fractals. I've used it and it produces pretty good results. Though I don't know how it would do at 400-500%.

[Rense]

Jason,
Thanks for your quick reply.

I've taken a quick look at their demoprogram, setting my desired sizes gives an dialogbox stating that the dimensions are to big. So this doesn't work.

[Nightcrawler]

Hmmm. That's interesting. I've never had a problem with it telling me that my sizes are too large, but then again I've never tried resizing something that large. You could try resizing using Photoshop's bicubic setting. There are three different settings for the bicubic resizing. I would think that either the normal or the smoother would be your best bet to reduce the chance of jaggies. You could also resize the image in small increments like 10% until you reach your desired size. Some people say that method works a little better. Also, IrfanView, which is a free file viewer, has Lanzcos resampling for its resizing. It is supposed to be better than bicubic, but from my tests, I only saw a marginal improvement. If none of those things work, you could just let whoever is going to be printing the pic to do the resizing themselves. Sometimes they do a good job. Hopefully this is helpful.

[Rense]

Jason,
I will make a test with 10% increments. I'm not in favor of letting the printer decide the resizing, especially if it means that you have to pay Eu40,-- upfront.
Thanks for answering my question.