PanoTools:
Re: PTGui - Eqirectangular Tiff Output - DPI Question
John Houghton 2005-Mar-31 19:31:14
Just divide the pixel dimensions by the ppi resolution setting of the
file. This gives the nominal print size. Print programs will
generally print the image at that print size, but many will also
allow you to print the image at a smaller or larger size. Printing
it larger will tend to give reduced quality, as the available pixels
will have to spread over a larger area. There is no maximum size:
the bigger it gets, the worse it will look. Printing at around 240
to 300 pixels per inch will give you high quality. The law of
diminishing returns sets in above that.
John
--- In #removed#, "russellcobley2004"
<#removed#> wrote:
>
> Thanks Joost!
>
> I should have checked your site first!
>
> However this leads to another question... Assuming my output .tif
> file from PTGui is 6900x3450 pixels and 93mb, what is the maximum
> centimetre dimensions I could print it?
>
> I am new to printing out panos so I apologise if this is rather
> simple to others!
>
> Is there a formula I could use to calculate the max print size at
> different DPI/LPI resolutions?
>
> Thanks and best regards,
> Russell
>
> --- In #removed#, Joost Nieuwenhuijse <#removed#>
> wrote:
> > Hi Russel,
> >
> > The resolution does not matter, please see (5.4):
> > http://www.ptgui.com/support.html#5_4
> >
> > Joost
> >
> >
> > russellcobley2004 wrote:
> > >
> > > Hi,
> > >
> > > I have noted that the single .tif output from PTGui, after
> running
> > > through enblend, results in an image with a 72dpi resolution. My
> > > source
> > > input images are all 300dpi .tif's. I am interested in printing
> out
> > > some of my panos.
> > >
> > > Why does PTGui output .tif files at 72dpi? I know that I can
> change
> > > the
> > > resolution in Photoshop but that of course reduces the actual
> image
> > > size. Is there a way a retaining the PTGui output .tif's pixel
> > > dimensions but change the resolution from 72dpi to 300dpi for
> > > printing.
> > > Or is my only option to change the resolution in Photoshop and
> live
> > > with the reduced image size?
> > >
> > > If anyone who prints panos from PTGui/Panotools output who can
> offer
> > > some advice, I would be very grateful!
> > >
> > > Thanks
PanoTools Wiki: http://wiki.panotools.org
PanoTools Extended Topic Forum: http://forum.panotools.info
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/PanoTools/
<*> To unsubscribe from this group, send an email to:
#removed#
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/