Hi
I have used RC for a while .It’s fantastic.
I notice a small problem from my latest scan.
Some area are suddenly more rough than the others.
And their outline are quite clear and straight.
I used lazy Susan for the object rotation and camera set on a tripod with remote control.Images’ quality are not bad .
images attached are examples
How can I avoid this ? Thanks
Interesting, I’ve been seeing quite a lot of this sort of surface triangulation but putting it down to specular features or an artifact of choosing the wrong smoothing parameters (I’m smoothing then simplifying and get residual single triangle peaks/dents in the mesh).
Here is a smoothed, simplified surface showing the pimples:
Capture.JPG
(clip from un textured part of https://sketchfab.com/models/4749c14243 … 732bd34ee7 )
Or mine may be completely unrelated… Nice scan setup btw - was it a commercial rig or something you put together?
Hi XF
its clear sign of bad alignment, some of the cams are not properly aligned so you get mesh artifacts. Have you used default settings or ? Please make screenshot of them and post here. )
you captured the project in RAWs or JPGs form camera ?
Wishgranter wrote:
Hi XF
its clear sign of bad alignment, some of the cams are not properly aligned so you get mesh artifacts. Have you used default settings or ? Please make screenshot of them and post here. )
you captured the project in RAWs or JPGs form camera ?
I thought it might be ,but dont know how to improve it .I used default setting.
And I had another try today ,but change “images overlap” setting to high ,and “max features per image” to 20k and “per image” to 60k. The end model is even worse.
Jennifer Cross wrote:
Interesting, I’ve been seeing quite a lot of this sort of surface triangulation but putting it down to specular features or an artifact of choosing the wrong smoothing parameters (I’m smoothing then simplifying and get residual single triangle peaks/dents in the mesh).
Here is a smoothed, simplified surface showing the pimples:Capture.JPG
(clip from un textured part of https://sketchfab.com/models/4749c14243 … 732bd34ee7 )
Or mine may be completely unrelated… Nice scan setup btw - was it a commercial rig or something you put together?
I’m not sure if it to do with smoothing .It looks very weird in vertex mode.
It’s just a test on scanning small object .
Here is the result 
The surface seems slightly shiny to me, especially the red part at the bottom.
As Wishgranter said, it’s a misalignment.
You can try and add some control points, which should help a bit.
Did you use the inspection tool?
It might show you the areas where the cameras are not tied together properly.
Götz Echtenacher wrote:
The surface seems slightly shiny to me, especially the red part at the bottom.
As Wishgranter said, it’s a misalignment.
You can try and add some control points, which should help a bit.
Did you use the inspection tool?
It might show you the areas where the cameras are not tied together properly.
Thanks
The red area is the painted area with some highlight ,white and pink area are rough ceramic .Black is in between.
I thought control points is for measurement ,never used before .Same as inspection tool.
Götz Echtenacher wrote:
The surface seems slightly shiny to me, especially the red part at the bottom.
As Wishgranter said, it’s a misalignment.
You can try and add some control points, which should help a bit.
Did you use the inspection tool?
It might show you the areas where the cameras are not tied together properly.
Hi Götz Echtenacher
I’m trying to add control points.
What is the red triangle sign means ?
Thanks
Hi XP,
it’s all covered in help and the forum.
It means that RC thinks the error is too big.
I think above 2 the number gets red and the triangle appears.
It is the difference between your definition of a singular point (via CP) and RC’s tie points in the area in pixels.
Activate a 2D view and go to scene and tick “show residuals” or something like that.
Then you can see orange lines which will give you a better idea of alignment problems.
In your case, that’s probably a good sign because RC has had some trouble finding the right matches.
Just define a few CPs and align again.
If all the errors are below 0.5, it should be fine.
However, it is likely that there will now be other spots where the misalignment will have increased.
Just continue this procedure until you are satisfied.
And yes, it does take time and effort, there is no way around it apart from taking more images (which can be much quicker).
Götz Echtenacher wrote:
Hi XP,
it’s all covered in help and the forum.
It means that RC thinks the error is too big.
I think above 2 the number gets red and the triangle appears.
It is the difference between your definition of a singular point (via CP) and RC’s tie points in the area in pixels.
Activate a 2D view and go to scene and tick “show residuals” or something like that.
Then you can see orange lines which will give you a better idea of alignment problems.In your case, that’s probably a good sign because RC has had some trouble finding the right matches.
Just define a few CPs and align again.
If all the errors are below 0.5, it should be fine.
However, it is likely that there will now be other spots where the misalignment will have increased.
Just continue this procedure until you are satisfied.
And yes, it does take time and effort, there is no way around it apart from taking more images (which can be much quicker).
Thanks very much Götz Echtenacher .
I have tried adding 2 CP at the rough area ,which get a nice result,smooth with detail and a few lumps .
But I also notice the other areas ,used to be ok now are very noisey.
So I kept adding more Cp(total 10).I dont think result improved ,some parts are even more rough.
About adding more photos .Does lighting ,camera lens need match the previous one?
So you see what I mean! 
You need to play around with the CPs - it’s a bit of hit and miss.
It is possible to do it, but you need a lot of patience.
Sometimes, only one misplaced CP can mess everything up.
Lens is not so important, as long as there are around 10-20 images with the other lens.
Light is only important, if you want a good quality texture.
But for that you can deactivate the new photos again…
The background should be the same as well.
But if it is as blurry as your sample, it might just be ok.
If possible, try a unicolor background…