Mechanical piece

[Rémi Deletrain]

Hi everyone,

I try to reconstruct a mechanical piece, but AliceVision don't succes to build it.

I don't have point cloud after SFM process.

RealityCapture build it so I think the problem are AliceVision settings.

I don't know where is the problem. It's possible to help me ?

Sensor data : Sony;H3113;6.17

Pictures

[Peter Falkingham]

Where did you get 6.17 from?  This website says the sensor size is 1/2.3", which is 11.4mm.  So I added Sony; H3113; 11.4

I ran it with that added to the sensor database, and it worked fine:

[Peter Falkingham]

Sorry, missed the link to the website: https://www.phonemore.com/sony-xperia-xa2-h3113/specs/3882 

[Rémi Deletrain]

Hi Peter,

Thanks for your replay !

For 6.17 value see answer of Yann Lanthony in this post -- https://groups.google.com/forum/#!topic/alicevision/MiZt9k3VMJ8

For my first test I used like you 11.4mm but I don't have good result.

You used default settings ?

[Peter Falkingham]

Intruiging.  Yes, this is default settings (I often turn on guided matching for feature matching, but deliberately didn't here).  I also ran with my database containing 6.17, as suggested by Yann, and it worked fine, matching all 20 cameras in the first dataset.  Given Yann's response in the other thread, presumably the mesh would be cleaner with 6.17 (I haven't let these run to mesh because I can't tie up my computer at the moment).

So it matches all 20 cameras on default settings regardless of whether the database contains 6.17 or 11.4

[Rémi Deletrain]

I try with MechanicalPiece_2 (img_2) and I have a good result.

But with MechanicalPiece_1 (img_1) view port doesn't have point...