[ptx] Any need for automatic batch correction of barrel and pincusion distorsion?

[Tim Jacobs]

Hello Mattias,
Check out clens at http://sourceforge.net/projects/panotools. It does
exactly this for a large number of camera/lens combinations that have
been calibrated. In clens, the camera is also determined via exif data
so you can actually batch correct images taken with different camera
(as long as they have been calibrated).

Tim 


On Sat, 18 Dec 2004 12:07:06 +0100, Mattias <traesket at glocalnet.net> wrote:
> Hi!
> 
> I have made a quick hack to automatically correct barrel and pincusion
> distorsion in images taken by a digital camera.
> 
> The concept is simple:
> 1: Read the EXIF tag embedded in the image.
> 2: Use the tag "FOCAL LENGTH" to pick a set of correction parameters
> from a correction table specific for the camera/lens.
> 3: Use the parameters to correct the image.
> 
> The beauty in this is that it can be done in batch mode. You can take
> 200 pictures and feed the images to a script that processes the images
> for you. Since all information needed to correct each image is embedded
> in the image, it is simple. Once you have determined the correction
> table for your camera/lens, of course.
> 
> I recently used the hack to correct a large number of images from an
> indoors photo job I did. And it was of great value to me.
> 
> Now, I have only made a hack. It is kind of a concept demonstrator. But
> it works great.
> It needs further work. It should also consider that object distance
> affects the distorsion somewhat.
> 
> I wonder, is there anyone else but me that could find use for this kind
> of program?
> 
> I am no wizard in optics... but know some of the physics, and I could
> use some expert tips in the future.
> 
> Any suggestions on any other maillists I should post this on?
> 
> Regards:
> Mattias S
> 
>