How does APP handle correction of lens distortion in images?

Hi Rudy,

Yes it certainly has 😉

It's the dynamic distortion correction feature in the registration engine. APP calculates these distortion profiles of the optics dynamically while integrating. And you can save these modules as well.

The profiles that APP creates are of a much higher degree (6th radial degree with varying Center Of Distortion) than Adobe supports.

The Adobe profiles will not work with enough accuracy to achieve optimal subpixel registration precision in the case of strong optical distortion. I have tested this extensively myself and the distortion correction that APP provides is simply better and more reliable because APP can calculate the distortion profile for your objective/ota, whereas the profiles of Adobe are generic per objective model and thus never precise enough for our purpose. Due to fabrication uncertainties, not all objectives of a certain objective model are exactly the same, so the Adobe profiles will only give you precision limited by the variance in fabrication of those objectives. Therefore these Adobe models can give you only correction with simpler and less accurate models.

The distortion correction in APP is so good that the creation of big automatic mosaics are possible as you are possible aware. Without accurate distortion correction this simply wouldn't be possible.

This is an ultimate example, a fully automatic 70 panel mosaic by Kees Scherer with a registration precision of only 0.1 pixel for the entire mosaic 😉

You can save the camera profile in APP for your camera + objective(s) 😉 that will help as well though.

Kind regards,

Mabula

Hi Mabula:

Thanks for the speedy reply.

This is great news indeed! I suspected that it was probably the Dynamic Distortion Correction feature that did this, and it was, but I had no idea that it was so advanced and accurate a feature! Excellent!

Cheers,
Rudy

You're welcome Rudy 😉