PanoTools mailing list archive

Mailinglist:PanoTools NG
Sender:Andreas Siegert
Date/Time:15-Mar-2012 20:00:20 +0000
Subject:Re: How to find lens correction parameters with the calibrate_lens_gui


On 15.03.2012 19:49, Bruno Postle wrote:
> Click on any lines that you don't think are worth using, they'll be 
> marked as red and won't be used in the lens distortion calculation.
Well, if I had anything to click on. The algorithm doesn't find too many.

> You could also try a subject with a few more lines in it...
I tried my cutting board with a grid. It did not find any line in there.

> Alternatively take multiple photos from different directions, as 
> many as you like, and load them in the Calibrate Lens tool all at 
> the same time - This is equivalent to a single photo with lots of 
> lines.
Tried that as well. At max I had one line per image.

I am wondering what the algorithm likes...
Maybe I am mistaken, but doesn't the Canny algorithm have more
parameters than the tool exposes?




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