So, I have a print file measuring 8400 x 1998 pixels. Now, I would like to print this as big as possible, going with 240 PPI.
This would yield a print 35 inches long by 8.325 inches long.

What are your thoughts on being able to stretch this print up to 12 inches tall? Would it be possible through interpolation/upsizing of the print using CS4? My calculations yield that if it could be made 12 inches tall, it would be 50.4 inches long.

Thanks.

 

Just try it an see.

 

Well, I'm planning to do a large scale panorama from this, on stretched canvas. Thus, it is fairly expensive, and wish to get it right the first time.

 

The print in question is underneath:

Antarctic Panorama

I have permission from the photographer to print the file, so that's not a problem.

However, when I plug the file into CS4, in Image Size, it gives me:
116.667 x 27.75 inches @ 72 ppi. I'm thinking that it can be upsized to 240 ppi and dropped to 50.45 x 12.00 inches.

Your thoughts?

 

When you plug in the new width of the image you can also change the dpi at the same time. 300 dpi yields a file about 10.5 mp. Should be fine- there are plenty of pixels there for the print.

You might want to check with some local sign shops for pricing- lots of them have the canvas and their prices are cheaper than so-called art or giclee printers who are probably using similar equipment.

Here's a piece of the image sized up at 300dpi w/CS2...

 

do a test strip to see the resolution.

 

Why not print it at 160dpi from the get-go?

 

That would seem like the easiest thing. After talking with a couple of local shops, it seems like the print provided should go to 18 inches tall by 75 (ish) inches long, at an adequate ppi (in the 240 range), and still look awesome. I'll definitely take a picture of this beast when she's up.