Sometimes in my scans I get distinct “patches” or areas in the model that have a lot fewer points than the immediate surrounding. Here is a screenshot:
Btw, if it seems this is a bad scan, the model is a pastry so I think the rest of the model came out pretty precise. It’s just I’m wondering about that patch, why does that tend to happen? Is there some setting I can change to prevent that? Why would it suddenly find so much less data in that precise area?
Hi Withnail
It looks like some issues with depth maps…
Can you zoom a bit out so that I can see cameras and then use the INSPECT tool ?
Hi Milos,
Here is the inspect tool:
It looks like I’m missing the green line between a set of images. And also there is a red line going from the second row, to the third row.
I suppose this could be due to a focusing problem? I noticed the first row of photos (from the bottom), is slightly less accurately focused than the rest of the rows. But the problem seems to be between the third and fourth rows of photos?
Hi Withnail
Can you send me the RCPROJ file + folder + images for inspection ?
Hi, I’ve sent you a PM with the Dropbox link to the project.
Hi Withnail
The main issue here is the image quality, ALL images are blurry, hard to say if it is because of camera settings (missing that info on images ! ) or some sort of post-processing…
untitled-11.jpg
You need to get SHARP images - not so blurry like data here, as blurry images tend to cause misalignments ( small to high degree )…
I have realigned + reconstructed it with a bit different settings and it looks OK now… Take it from my PM 
Thanks a lot for taking a look! 
In my defense it was that one row of images that looked as blurry as that. The rest were much sharper, but I need to be a lot more careful when taking pictures for sure.
I reviewed your settings (please don’t be shy about saying why you changed what you changed 
) and I think I understand most of the changes you did. First you set the detector sensitivity to Low, I assume this is better when the images are of lower quality?
You’ve also raised quite a bit the max features per image, and the preselector features. Regarding preselector the manual just says:
“Preselector features This is the number of features that will be used in alignment from the detected. Optimally, set it to 1/4-1/2 of the detected features.”
Where can I find the nr of “detected features”? Is that in fact the “Total projections” nr from the Alignment report?
Hi Withnail
Thanks a lot for taking a look!
much sharper ? not so much… i would NOT use any of them, all images are “too” blurry…
I reviewed your settings (please don’t be shy about saying why you changed what you changed
Yes, LOW can be used to solve this but again it needs a bit of experience when you use them… or you can use a combination of first medium-high ( NOT ultra ) and then LOW…
You’ve also raised quite a bit the max features per image, and the preselector features. Regarding preselector the manual just says:
“Preselector features This is the number of features that will be used in alignment from the detected. Optimally, set it to 1/4-1/2 of the detected features.”
you set say 80k detected points but the PRESELECTOR takes just the desired amount of them ( taking better quality features ) so it takes say 40k points that are used for alignment process. but the final alignment takes from the preselector value points. you can get info on a particular image in the 1Ds view or, when you have it in the 2D view ( image loaded in the view ), set to 1Ds view…
