Hello, i’m trying to recreate in 3D a figurine i have. I put figurine on turntable and made a photo of it every 5 degrees. I have about 140 photos of it. (See link 1 for an example of a photo)
I alight photos inside RealityCapture, define the recreation bounding box around figurine and create a model using “high” setting. I’m not getting very good results for some reason.
Hi Vladim
It’s because the subject lacks “features” on the surface. That means flat featureless subjects are always a problem to scan using photogrammetry. You need to use pattern projections or some powders to get it on a model…
I recommend you to take a look at James Busby’s nice tutorial regarding scanning transparent stuff, which is almost the same as featureless subject in your case: http://www.3dscanstore.com/index.php?ro … post_id=19
be read and tracked properly? I’snt they too small and be easily lost? Or be replaced in the process of tracking by the other dark dot that happend to be around and thus ruining calculations?
I kinda assumed details should be much bigger.Or it is fine to have such small similary looking details?
I am in a similar situation at the moment, I like to scan small plastic model parts, but ofcourse they are injection moulded, so they are a little bit glossy and featureless. I have used Tamiya’s “fine” primer and very lightly coated my parts so I get a very small and fine “speckle” pattern on the surface to create a feature rich part. This works great, but the only problem I have is that because the parts are so small, I have to use a macro lens and upon inspecting the images, the tiny dots of primer that look very smooth and flat on the surface with the human eye are very proud of the surface of the parts and so I am getting a bumpy surface result (its picking up the surface height of the paint on the plastic parts)
Wishgranter wrote:
You need to use pattern projections or some powders to get it on a model…
I want to try an alternative method as you mentioned above, how is this achievable with pattern projection? I am using a tripod, lightbox and a turntable method. I have a small, high res projector in my office, can I introduce it to my current setup to project a random noise pattern while rotating my part on the turntable?
Small figurine even if them have good textures required focus bracketing. For such small distance, for macro, F11-F14 still have limited DOF, and some scanned surfaces out of focus. So depend on your camera hardware you probably will need from 7 to 3 focus brackets (but not use photoshop/etc focus stacking!! It only for pleasant view, and not photogrammetry correct)
