proj-imim:
Re: PT Documentation
Philo 2000-Apr-21 11:08:59
-----Message d'origine-----
De : John Spikowski <#removed#>
Ë : PROJ-IMIM <#removed#>
Date : vendredi 21 avril 2000 09:21
Objet : PT Documentation
>Philo Wrote:
>
>My procedure is as follow :
>
>1. First I shoot the panorama, 3 fisheye snapshots 120¡ apart
>
><John> I'm using a 180 degree fisheye lens (8mm) with two shots.
>
>2. Using Photoshop I then crop the three photos to a square just on the
limit
>of the fisheye circle
>
><John> Do you save the cropped images as .JPG or .PSD?
With hard disks prices you get now, save the PSD, you will not degrade
further the images with compression !
>
>3. Add a new layer on each photo and place a colored arrow near 4
>corresponding spots between photo 1 and 2, then photo 2 and 3, then photo 3
>and 1. Try to disperse the 4 arrows, but don't chose points too close of
the
>fisheye border, the distortion is heavier here. These arrows are only a
>visual aid, and have nothing to do with the coded arrows provided by
Helmut.
>
><John> I'm new to PhotoShop and the use of layers. I don't have a problem
using
>Pixel Picker to generate "C" lines. If this is a easier way to find like
points
>in both images, then how do you do this? How is Helmut's "markers" used in
>PhotoShop? (Detail Please !!!)
>
Maybe PixelPicker is the way to go now, I gave it a try and it seems to work
fine - except perhaps for the precision (no zoom...) It sure is faster and
less error prone than typing in numbers !
>Hints on switching between layers would also be helpful.
Just click on the layer's thumbnail.
>
>4. Using the Photoshop info, enter the points coordinates in the script
file
>opened in Notepad (I join an empty script file with the parameters I
optimize).
>Tedious, but easy...
>
><John> "PhotoShop info"??? Do you mean the X and Y pixel positions in each
>image? Isn't pixel picker a faster way?
Yes it is ! I didn't tried it at that time !
How is optimizer run from the plug in?
see Sascha Kerschhofer The PTools Absolute Beginners Guide
http://stud4.tuwien.ac.at/~e9127005/ptools/, Using Ptools/Using scripts, it
is well explained... I'm writing yet another tutorial, but it's not
available now...
>Can't the two warped images be seamed visually in Photoshop? Why make
Optimizer
>spend 20+ minutes guessing where the seam should align at?
>
Shure you can do this... it may look right seen as an image, but you will
have broken straight lines when seen with a VR viewer
>5. Run panorama tools optimizer. For a 2400x1200 panorama, the error should
>not exceed 5 pixels, 2 pixels for a 800 x 400 (small but fast to render).
If
>the error is higher, either the shots were bad (heavy tilt for example) or
>more probably you made an error entering coordinates.
>
><John> How much does entering control points help the sticher?
>
>6. Don't forget to re-select the photo layer before running panorama tools
"I
>nsert" or you will get a colored arrow panorama ;-). That's the mistake I
>too often make...
>
><John> How tedious is getting the X and Y coordinates from Photoshop where
you
>have your arrows pointing to?
>
>7. To get a layered photoshop image (useful to fine tune the seams or to
>adjust the color/brightness between the 3 parts of the pano. Yes, this can
>be necessary even with AE-BL lock and 1.3 firmware - you can for example
>perfor a 30 pixels gaussian blur on the masks to smooth the seams), edit
the
>script file and suppress all references to +buf / -buf in the command
lines.
>
><John> is this the script file your using while in PhotoShop? So, you must
>maintain an external script file while working in PhotoShop?
>
There is ony one script file, the one that you give to the optimiser. This
optimiser adds to this file and that's where you must delete buf commands if
you want to keep masks
>
>8. Run panorama tools "Insert" on each image in the right order. Set the
>prefs to "Save full sized result to file"
>
><John> This is where I'm really lost. I have seen four different procedures
and
>using the Buf option.
Again, see Sascha Kerschhofer The PTools Absolute Beginners Guide
here is the quote :
"Open your first file and select Filter - Panorama Tools - Adjust. In dialog
Create Panorama select Insert and Use Script. Click on Browse and select
script.txt in your working directory. Back in dialog Create Panorama click
Ok. The first file is now distorted and inserted into the buffer. Open your
second file and again select Filter - Panorama Tools - Adjust. Since PTools
has remembered the previous setting just click Ok. Repeat this until all
your images are processed. Then select Filter - Pan Controls - Get Pano. The
resulting pano is now opened. "
>
>9. Open the result, make any adjustments necessary, flatten the image and
>save it as a Jpeg file.
>
>How are adjustments made in PhotoShop. (pitch, roll, yaw, tilt, ...) and
the
>results viewed before you save your final image to run in a viewer.
>
>I have to admit, this has to be the most difficult software to understand
and
>use. It's wonderful stuff and Helmut has proven to me that a image can be
made.
>I just wish the documentation would be more clear. Each document I read has
>it's own way of getting the same thing done.
That's true, every one has its method to use a tool. Try to stick with only
one approach until you feel confident enough to try other...
>
>I think more IPIX users would use Helmut's toolset if they could understand
how
>to use it. All reviews I have read say the same thing. "Great tool,
difficult
>to use."
>
>I would like to work with folks here on the list to come up with a simple
>procedure on how to build panorama images. Lets not assume the user has any
>prior knowledge of the tools they would be using.
>
>
I'll try this in my tutorial...
Philo
http://philohome.free.fr