Resizing BIG time

[Jen]

Hi,
I am supposed to make composite images for panels 4 feet x 8 feet.
But the original images I have been given for this are 15 inches x 20 inches 300 dpi, many are in LAB.
I only need to use about 3 or 4 images per panel which means that the original I have been given need to up-sized if I maintain 300 dpi.

Question would 150 dpi be good enough?

What is the best way to up-size?
In the document?
before dragging it into the new document?

And I know this will be a slow process, I am fiddling with a 4 gig file now!

Thanks for any help or advice.

Jen

[thom]

Jen

When you scale them make sure resampleing is checked
150 dpi will not look good, keep it ao 300.
Also I don't know why this works but it does,
scale the image at 110% untill you get the size you need.
Tests were done and I ran some myself, If you create an action that scales 110 this will help keep the grain in the image at an min.
It sounds strange and its time cosuming but it works.

Thom

[Lesa]

FYI, I wrote a tutorial on upsizing images (http://www.graphicreporter.com/tutorials/photoshop_enlargingimages.html) several months back, maybe it'll help!