Talkback for article: 348, September2004

Creating panoramic views using Hugin, Enblend and The Gimp

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From: François Battail <fb {at} francois.battail.name> [ date: 2004-09-03 ]
Thanks a lot for this nice tutorial, I hope Hugin will be available in Debian SID soon (whatever is it builds fine). With The Gimp, dcraw (plugin for Gimp to import digital cams file using the raw format) we have now workable imaging tools for Linux.

Keep the good work done.
From: Anonymous User [ date: 2004-09-03 ]
binding images should be done with control points in about same "depth". not just avoiding close points but also too distant. there is case of placement where it will also hurt final panorama as bad as close point.
From: Mike [ date: 2004-09-06 ]
Especially with panoramas that include the horizon, you should put horizontal line control points in to keep it straight. In your example, the horizon is slightly curved, but in very wide and short panos, the horizon can wander significantly.

It's similar to the technique described here:

http://hugin.sourceforge.net/tutorials/architectural/en.shtml

Except you use horizontal instead of vertical control points. Pick two points in different spots along the horizon (they can even be from different spots in the same source image) and select horizontal line as the type. I like to use vertical control points as well when the panorama includes objects I know are plumb (like buildings), unless I'm going for a barrel distortion look.

I'm glad you mentioned enblend -- it should be very helpful for those just getting started to know to use it. It took me a while to find out about it, but it's absolutely essential!
From: Vinicius Pinheiro <vinnie.gp(at)gmail.com> [ date: 2004-10-16 ]
Im very grateful for this tutorial!
I've been looking for this for a days in the net and finally i could do my panoram image.
Its perfect. Thank you and keep doing a good job!
From: Martin Wehner <martin_wehner(at)freenet.de> [ date: 2005-03-22 ]
Before switching to the third tab "Control Points" you should
use Autopano to create control points automatically. Do this
by pressing the button "Create Ctrl Points" on the first tab
"Images". This saves a lot of time in setting control points!
You can get Autopano from http://autopano.kolor.com/ .

Since hugin 0.5 there is an option "Optimize positions
(incremental, starting from anchor)" in the fourth tab
"Optimizer". Use this default setting to calculate the
y-positions of the images and to line them up automatically.
Afterwards you can check the result with the menu entry
"View:Preview Window". Only if the images are lined up
properly you should use "Optimize everything" for
fine-tuning.

But if the panorama shown in the preview window is very
curved, then reset all values and choose another position
anchor. Or reset all values and then try another pitch
and/or roll value for the anchor image.

Sometimes it's better to set the horizontal and vertical
angles manually with the sliders in the preview window
instead of calculating them by pressing the button
"Calculate Field of View" in the fifth tab "Stitcher".
This often reduces the black parts in the image and results
in smaller files.

You get also proper results if you use "Cylindrical" for
full 360 degree panoramas.

Set feather width to 0 if you use enblend! Take care that
you order the image names in the command line in a right
way! And yes, I agree that enblend really needs a lot of
memory and time, so do not start enblend if you are in a
hurry!

Autopano, enblend, hugin and Panorama Tools do really a
good job! Take a look at

http://people.freenet.de/martin_wehner/bilder.html#panorama

for viewing some panorama images created with these tools.
(For those who do not speak German: Click on the panorama
thumbnails.)

Here are the download locations for the tools:
http://autopano.kolor.com/ (Autopano)
http://enblend.sourceforge.net/ (enblend)
http://hugin.sourceforge.net/ (hugin)
http://www.tawbaware.com/maxlyons/pano12ml.htm (Panorama Tools)

For viewing 360 degree panoramas I can recommend the
FSPViewer: http://www.fsoft.it/panorama/FSPViewer.htm .

From: Bruno Postle <bruno(at)postle.net> [ date: 2005-05-20 ]
Update May 2005

Compilation of the hugin suite is now much simpler:

* The Panorama Tools library (libpano12) no longer requires java to build.
* Hugin no longer requires the fftw library.
* Hugin no longer requires the vigra library.
From: Denilson [ date: 2005-12-19 ]
About "cropping" the image with Gimp, it will be a lot easier to use the "crop" tool, instead of "select" tool. It is the 12th tool at my gimp toolbox. It is just after "move" tool. The shortcut is Shift+C.

Try it, and you will see this is the best tool for cropping images.

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