Proper Way For Poster Sized Prints

[Mario.]

I am curious as to which resizing, sampling, and sharpening methods people are using for larger prints.

Can you give me a walk through of your inport settings (resolution, dpi, etc.) and any other recommendations? :) Thanks!

[Dchemist]

I simply crop to the size I want in CS3 at 300 DPI. The software uses a bicubic routine to resample the image and it works great. What do you consider large - I have done 20x30 and was pleased with the results.

[tim]

My workflow:
1) Open RAW file in Photoshop via ACR.
2) Resize to 20x30" at 300dpi (or for my other lab 250dpi) using the recommended algorithm in the photoshop image size command - I think it's bicubic softener for enlargements, bicubic sharpener for reductions.
3) Save as Q12 JPG
4) Send file to lab

[chris.bailey]

What do you mean by larger?

I would use Tims workflow for prints up to say 20x30 printed at lab but for REALLY big prints (I regularly print up to A0 for client presentations) you will be forced to drop the resolution and I have successfully dropped down to around 100.

Go easy on the sharpening on big prints as the sharpening artefacts start getting very visible. For big prints I dont normally sharpen at all as the cons outweigh the pros.