great model on my old camera but mess on new one (same pics/angles/settings)
Hello,
I already contacted the support about my current issue and sadly, the answer I had was that I was not doing photogrammetry correctly. I've been doing photogrammetry for "only" one year and half but still, I think I had enough experience with 200 models to know how to proceed and what to avoid.
So today I did a test with my lumix gh5 and my lumix gx9, both have same sensor, same settings and same aperture/iso/shutter speed. Shooted in raw. Same lens same focal length (60mm).
I tried to do as much as possible the same pictures from same distance and angles, as it was outdoor. I ended with 408 pictures from my gh5 and 345 with my gx9.
Gh5 get 407/408 aligned while gx9 had 3 components and the bigger (as well as others) is completely messy.
Even if I made a few shots more with gh5, such a difference in these results can't only be linked to this I think.
So now I have to figure why this happens as it already cost me a lot of lost days and hours and hours of work on my computer.
I don't think/know it's software fault, might be (certainly) issue with my new camera or some hidden setting that would be different, but I must say I regret I had the answer that I was working bad and to read some tutorials.
Following models are results on gh5/gx9 on preview reconstruction mode.
-
Hi,
Based on the screenshots, your shooting technique is not the best. You are basically shooting panoramas which is not optimal for photogrammetry. I advise you to follow the advice from the support team.
You should create an envelope of cameras around the scanned object to get the best results. Something like this:
350 images all aligned on default settings in a single component. I guarantee you if you change your technique, you'll get better results.
-
Obviously I did these tests only to see if the messed up result would be on both camera, not to do a perfect scan. And of course it worked, 407 pics on 408 (99.75%) of pics aligned
The following model is with my method and the result is good considering it's only on preview reconstruction and colorized, not textured.
I'll turn to a professional photographer so I can finally solve my issue with the problematic camera.
Thank you for your time.
-
Yes, of course. I just tried to give you a general tip, so you don't waste time in the future.
To elaborate, I know from experience that shooting with the panorama style causes misalignments and visible errors in the model or noisy surfaces.
For this specific case, I think that fewer images caused the multiple components. It can take only one missing photo that breaks the connection. I believe it is this simple and there is no problem with the camera. Every time something went wrong for me, it was the photos. Either the distribution of the images or their quality.
I am sorry, but I don't have any more advice for you. Good luck with the project. Maybe someone else can give you better advice.
-
I understand you try to help but as I said in the first post here, it's sad you only approach the issue this way.
This is not the first time I get this kind of answer, feels like you guys don't really consider the description of our experience.
I already said one of your collegue blamed the process to cause this and you do the exact same thing right after my post. This is why I will not ask support for help anymore I guess unless it's a question about software itself.
And I'm not upset while I write this, I just wanted to tell you so maybe you (team) could improve to help better in the future.
Ps : 95% of my models turned great until I change my camera, from then 80 to 90% is complete waste. I didn't change my way of taking pics or forgot how to do photography. That's what I would have like you to consider, both here and by e-mail.
Have a nice day.
-
Hi The-Runaway,
we are sorry, that you feel it like this.
If it is possible, can you send us your datasets?
Also, can you please taking images using Jakub's way with both cameras of something simple if this problem will repeat? And send us also this second dataset?
We will test them and send them to our developer team to analyze, if there is some kind of problem with that camera.
Again, sorry for the inconveniences.
Please sign in to leave a comment.
Comments
7 comments