[hugin-ptx] Re: Lens Distrortion Params in EXIF

2008-10-31 Thread paul womack
Jaroslav.Beran wrote: Hi, Klaus, as you can see from my post, lens distortion parameters vary with focal length. There is a high possibility, that they also vary with each camera of the same model. But - if they vary with focal length, it seems to me, that they are calculated by the camera

[hugin-ptx] Re: Lens Distrortion Params in EXIF

2008-10-30 Thread Markku Kolkka
Jaroslav.Beran kirjoitti viestissään (lähetysaika torstai, 30. lokakuuta 2008): But that was not the point of my questions/suggestions. I'm just curious, why these parameters are not used directly by Hugin. Because Olympus hasn't released any public documentation on how to use those

[hugin-ptx] Re: Lens Distrortion Params in EXIF

2008-10-30 Thread J. Schneider
Klaus schrieb: On 30 Oct, 14:52, Jaroslav.Beran [EMAIL PROTECTED] wrote: At least with my cameras, there is only a finite number of zoom positions. So I suspect a rather small lookup table. PTLens works with lookup tables as well and it works fine. Why do I have to difficultly determine lens

[hugin-ptx] Re: Lens Distrortion Params in EXIF

2008-10-30 Thread Jaroslav.Beran
Hi, Klaus, my camera has infinite number of zoom positions, as it has seamless zoom from 6.3 to 63 mm (38 to 380 mm if we speak in terms of 35 mm camera). So it seems to me, that there is no lookup table, but lens distortion parameters are calculated. Regards Jaroslav On 30 Říj, 16:27, Klaus

[hugin-ptx] Re: Lens Distrortion Params in EXIF

2008-10-26 Thread Klaus
Hello Jaroslav, While it is nice to have these values saved, I have found that lense parameters vary within the same camera model. Hence I usually have them optimised from the image data itself, which overall requires a few more control points. Do you have an idea what mathematical model