I am processing photos from a Phase One camera with an accurate camera calibration but Im not sure exactly what is happening when I enter the calibration for processing. Is it using the calibration during processing or are the values I enter only used as a comparison to what Context Capture gets?
Also, the camera came with 3 different calibrations - Australis, USGS, and INPHO. I think I use Australis but Im not positive because if I let Context Capture adjust the calibration, the distortion values are not even close to what I entered.
Any help with understanding the camera calibration aspect of Context Capture would be great.
Thanks!
Thank you again Oto. I understand what the "e" stands for and even though I know very little about camera calibrations, just looking at the numbers, they seem to change quite a bit to me, relatively speaking I guess. But I think the bigger issue is the distortion. I didn't really think of that until I typed the previous response. And when I put all zeros in for K and P and hold it, it comes out almost the same as when I hold the actual calibration values.
Surprise isn't it? The calibration seems unneded for already undistorted photos and Contextcapture even gets worse results doing calibration for already unwarped photos. This is where it seems another SfM sotware Pix4D has made it more proof for starters.
So I found out the images are still distorted when they come out of LMS, there is just very little distortion on these lenses. That means the calibration should work. Do I hold the calibration or let Context Capture adjust it to something different? Am I entering in the correct values? Like I said originally, there are 3 calibrations that came with the camera and the Australis seems like the correct one but I dont know for sure which one to use. Seems like a good calibration should make the results better not worse.
Try with zeroing and also try with letting CC do the calibration.What is your acquisition plan? If you do not make a 3D calibration around an object then the calibration may not be accurate.
I have done both and letting CC do the calibration always gives me better results. The calibration I enter is from the manufacturer and came with the camera. You probably know this but these are really expensive medium format cameras. Is that the wrong calibration to use? Is there another calibration we should perform?
Thanks Oto!