Re: Panoramic Digital Negatives
Actually, I'm aware of the difference between dpi and ppi; As I
mentioned below, I said dpi because I was referring to output
resolution, which is measured in d (dots) p (per) i (inch). PPI refers
to capture resolution, and defines the amount of pixels per inch will
build the "digital copy" of a given original. It also refers to monitor
resolution, and defines the amount of pixels per inch a given display
has and uses to show digital content, be it images, or text, or whatever.
I was a first time user of PTMac too, because at that time I had both
platforms, but gave up on Macs since then.
Kees Brandenburg wrote:
Hi Rodolfo and Mike,
It's allways the absolute pixel numbers that count here! PPI (pixels
per inch and not dpi, because we are talking about pixels not dots) is
allways relaltive to your output mode(screen, printer, cellphone, iPod
etc.). When stichtching, height and width of your final image are
determined by the sum of the pixel number you input minus (the
neccesary) overlap and (un)warping loss by the stichching algorithm.
But you can tell PTgui or PTMac the exact number of pixels it has to
output and it down- or even upsamples (by inventing pixels) it for you.
PTMac is a Mac GUI for the panotools library and PTGui was originally
a PC version buti now has also Mac version too. Both apps are excellent
tools, with a somewhat high learning curve though. Photoshop CS3
merging is very easy to use.
On 19-aug-2007, at 1:05, Rodolpho Pajuaba wrote:
I donīt know about PTMac, but Iīm a first time user of PTGui, and it
does not maintain the original dpi - but, may I tell you, i does not
matter, as long as the total pixel count does not change. dpi is a
measure of the resolution of output, it does not alter the amount of
pixels your image has. It will only matter if you send your file to a
software like Quark, or InDesign, that takes in account this data.
When you send it to your inkjet printer, a Lambda or a Frontier, they
will adjust the resolution according to the size you ask to print.
Kees Brandenburg escreveu:
And Photoshop CS3 does excellent stitching/merging with the much
improved photomerge tool
On 18-aug-2007, at 18:52, Mike Kirwan wrote:
I have been experimenting with Arcsoft Panorama 4 and very pleased
with the "positive" results. Now I am importing into Photoshop to
convert to a digital negative and while all works well the output
from this software is always pegged at 200 dpi regardless of the
original dpi of the images. Anyone know of a panoramic stitching
software that maintains the original dpi?