Camera Alignment Settings

[AntonBlumenstein]

Hey guys,

I'm still working on my little project of scanning an apple.
I'm jusing a studio light setup and mask the apple.

I already got a decent result with the settings I used during the camera alignment and after this using the "reset camera realignment".
If I wouldn't have used the reset command my pointcloud looks kind of wrong.

So my question is what kind of settings are you using to get the best camera alignment in the first run. Or what would you suggest in my case. Current idea is to scan a lot of veggis and fruits.
Thanks for your help guys.


I attached a screenshot of my settings, the masking of a photo and the result.


Anton

[Alexey Pasumansky]

Hello Anton,

Do you have masks applied to all the images in the project?

[AntonBlumenstein]

Hey Alex,

Yes I have, and they all look like the one in the screenshots. So the Apple has a mask around it always.
Thanks for your help!

[Arie]

Hi Anton,
one thing that might help: Using generic preselection the image is downsampled to find potential matches before actually matching the images in full resolution. Since the apples surface is fairly homogeneous and even the available features are fairly similiar to each other, you might want to try unchecking generic preselection. Depending on your image count, it might take a lot longer but I had a couple of projects where this approach yielded way better results.
Good luck!

[AntonBlumenstein]

Hey Arie,

thats sounds like a good try!
I'm going to check it out.

Would you tell me what your prefered Key Points and tie Points are? And on which parameters do you adjust them?


Cheers,
Anton

[Arie]

It depends a bit on the type of project, usually the default settings are a pretty good starting point. Sometimes I increase the key points to 80.000 and tie points to 6000, afterwards using the gradual selection filter. And depending on the overlap, I also use "Adaptive camera model fitting".
Let us know, how it works out for you.
Cheers!

[Alexey Pasumansky]

Hello Anton,

Please keep us informed, if you get better alignment results with all the preselection options disabled.

[AntonBlumenstein]

I will. Can't do it next week because I'm on vacation but I'm going to test it out the week after.

Thanks for the help guys!
cheers,
Anton

[AntonBlumenstein]

Thanks Alex And Arie for your help.
It worked when I changed the settings.

Got a good result with your setting of 80000 and 6000

Thank you very much guys!

Cheers,
Anton