Nadir/Zenith patching workflow
- Since there has been quite a bit of discussion on this in the "ptgui project
failing" thread, I thought I'd share my workflow, but in a new thread.
What I've done is create some Photoshop actions and two PTGui templates that
automate a lot of the steps.
The two PTGui templates are as follows:
1 Extract Nadir 8K.pts
2 Insert Nadir 8K.pts
(I tried to upload these to the wiki, but it doesn't accept .pts files, and
renaming to .doc or .txt didn't work either. I'm more than happy to email
these upon request. If there is a way to upload .pts files to the wiki, that
would be great.)
The Photoshop actions are:
Save Nadir Export
Open Patch to Fix
Flatten and Save Patch
Open Fixed Nadir
(Feeling a bit thick here, because I couldn't upload the atn file, even
though it looks like that format is allowed... Help!)
Here are the steps I take:
1. Open the equirectangular stitched image. The dimensions of my stitches
are 8192 x 4096 pixels. I use layers, so any problems with content that can
be fixed by adjusting the layer masks I do first.
2. Once I'm ready to work on the nadir patching, I run the Save Nadir
Export action. This flattens the image, saves it as export.tif with
transparency in my H:\~~PTGui Templates folder with Copy and Without Layers
options, then goes back to the previous history state. That last step
restores your layers, and your equirectangular image remains open.
3. Launch PTGui Batch Stitcher and open the "1 Extract Nadir 8K.pts"
file. This template uses the h:\~~PTGui Templates\export.tif file you just
created as its source, for Panorama Settings the projection is Rectilinear
with 90 degree hFOV and vFOV, pitch of 90, and saved as a 2048 x 2048 tif
named H:\~~PTGui Templates\patch.tif, no layers. This takes a couple of
seconds to run. When the batch stitcher is finished, go back to Photoshop.
4. In Photoshop, run the Open Patch to Fix action, which opens H:\~~PTGui
5. Create a new layer in this image in Photoshop, use whatever tools and
techniques you prefer to make the nadir hole disappear, then run the Flatten
and Save Patch action. (This is pure laziness on my part. All it does is
flatten the patch file, save it, and close it.)
6. Go back to the PTGui Batch Stitcher and open "2 Insert Nadir 8K.pts".
This uses H:\~~PTGui Templates\patch.tif as its source image and has the
following settings: Panorama Settings is Equirectangular with 360 degree
hFOV and 180 vFOV, Pitch of -90, Width of 8192 x 4096, and saved as
H:\~~PTGui Templates\nadir.tif, no layers.
7. Once the batch stitcher is done, which takes less than a minute, go
into Photoshop and run the Open Fixed Nadir action. This simply opens
H:\~~PTGui Templates\nadir.tif. Drag the layer from nadir.tif onto your
original image while holding down the Shift key, (so that the positioning
remains the same), and you're all set. I double click on the layer and name
it "nadir" for easier reference.
8. Save, and you're done.
9. If you need to do zenith patching, the process is identical, except in
Photoshop, first choose Image|Rotate Canvas|Flip Canvas Vertical. After
completing step 7, repeat the menu process to flip it right side up.
I hope this helps. I've found it very helpful in streamlining the repetitive
tasks that otherwise can trip me up. As I said, I'm more than happy to email
the related files to anyone, or if there is a way to post these to the wiki
site, then let me know.
[Non-text portions of this message have been removed]
Thanks for the suggestion! I've uploaded the three files now. Hope they
> -----Original Message-----
> From: PanoToolsNG@yahoogroups.com [mailto:PanoToolsNG@yahoogroups.com] On
> Behalf Of Thomas Rauscher
> Sent: Sunday, August 31, 2008 3:32 PM
> To: PanoToolsNG@yahoogroups.com
> Subject: Re: [PanoToolsNG] Nadir/Zenith patching workflow
> Mark D. Fink wrote, On 29.08.2008 19:27 Uhr:
> > ..., or if there is a way to post these to the wiki
> > site, then let me know.
> You can put those files into a ZIP archive and post this file in the wiki.