wwp@yahoogroups.com:
Suggestions for Optimising Spherical Image Quality for WWP Submission?
Wheaton, Simon 2007-Apr-02 04:42:00
I have only stitched cylindrical panos in the past, and am trying to
stitch my first spherical pano for this current WWP entry.
I guess that in moving from cylindrical to spherical, I will have to
accept lesser quality panos, as there is more information in the
spherical image to fit into each of the WWP maximum file sizes for
preview and full screen, when compared to fitting a cylindrical image
into the same WWP maximum file sizes, is this correct?
I am also using PTGui for the first time, after switching from PTMac for
this WWP submission.
I am outputting a 16-bit low-contrast equirectangular TIFF file from
PTGui for contrast/colour adjustment in Photoshop CS2, and then using
that adjusted 16-bit TIFF file in Pano2QTVR.
In PTGui, I am using the settings 'Optimize using: PTGui', 'Stitch
using: PTGui', 'Blend Using: Enblend', 'Use fast transform: Off', and
'Interpolator: Lanczos' (as that is the default). Will these settings
give me the best output?
What sort of equirectangular dimensions do you use to produce the best
quality final QTVR pano, for both the full screen and the preview WWP
panos?
Do you output at these sizes from PTGui, or do you output from PTGui at
maximum optimum size, and then resize for WWP in Photoshop or similar?
Is it best to sharpen the image in Photoshop when it is an
equirectangular image, or do you convert it to cubic first and sharpen
the faces then? I was thinking that maybe sharpening the equirectangular
image might do something weird to the sharpening when converted to
cubic, due to the distortion at the top and bottom of the
equirectangular image.
Why do people extract the nadir from the image to retouch it, and then
reinsert it, why not just put the nadir image into the stitching
program?
I am using Pano2QTVR to convert the equirectangular image to a QTVR
file.
Do you use Pano2QTVR, or another program, and if another program, does
it produce a better final pano than Pano2QTVR?
What sort of settings do you use in Pano2QTVR for best pano quality?
Do you set the Cube Face Size to the suggested Optimal size?
Is there an advantage to using subdivisions, and if so, which is
subdivision is best?
Do you use different settings for each face, or all the same?
What sort of Tile Quality setting do you aim for?
In the Stitcher section, what Gamma setting and Interpolator setting
should I use?
Thanks,
Simon
Canberra
AUSTRALIA
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