I've just added 2GB of memory for a total of 4. I've read all the cautions about using the 3GB switch and will put that off for now. So for the moment I'm limited to CS2 using only 2GBs.
My question is, when I load Bridge or when I use a plug-in such as Fred Mirinda's SI Pro 2 - Stair Interpolation Pro, do they use the memory above the 2GB limit?
Thanks.
BTW I'm running XT Pro 32 on a P4 duel channel
#1
Why are you using Stair Interpolation (and dealing with all of it's artifacts) if you have Photoshop CS or CS2?
And each application can use 2 Gig out of your total RAM -- so yes, you will be using more than 2 Gig in total.
#2
I'm using Stair Inerpolation because I am under the impression that it is superior to CS2 in that regard when expanding an image shot in 35mm to, for example, 24 X 36 or larger.
Am I misinformed on this matter?
#3
No, Stair/Step Interpolation gives inferior results and just introduces nasty artifacts compared to Bicubic Smoother interpolation.
#4
Chris,
At the risk of hijacking the thread....
What situations or applications are the different interpolation methods best suited for? Or to put it a slightly different way, when would a user pick one over another?
Thanks,
Art
#5
Until Chris responds, the general rules I (sort of) go by are:
Down-sizing by more than 20%: Bicubic Sharper
Up-sizing by more than 20%: Bicubic Smoother
Up or down-size @ less than 20%: Bicubic
I freely admit that these are arbitrary limits that I often violate depending on the image.
#6
I think the truth of the matter is that if there were a numerical or procedural determinant it would have been found by now.
But there are so many factors and i'd guess that some of these are how the algorithms interact with image complexity and detail.
#7
Deebs,
That was sort of the direction in which I was heading too... For instance, if you have an image with large areas of solid color without much detail, intuitively, I'd pick smoother.
Another rule of thumb I heard mentioned when the improved interpolation methods first shipped was to up-size to 110% with sharper and then down-size to the finished size with smoother.
Art
#8
The step/110% stuff came from before Photoshop CS (and was still wrong).
#9
Okay, so what's the best way to enlarge an image -- from 35mm to 40' X 60' and larger?
#10
Begin with a correctly exposed, sharp image :-)
Use Bicubic Smoother
Sharpen after resizing.
#11
From 35mm to 60' (18,288mm)? You're dreaming...
#12
I gave Dunford the benefit of the doubt and assumed inches.
For "normal" portrait sizes the accepted resolution to work at is 300ppi. However (and this is what Howard means when he said it depends on the viewing distance) when you go to poster sizes and beyond, it is quite acceptable to target a much lower output resolution.
Those huge billboards look great from a distance, yet when you get up close all you see is a mush of dots. Those billboards can be - and have been - produced from 35mm, or the digital equivalent, format.
#13