Hello everyone
I took a hundred pictures of people wearing black clothe with a camera matrix and try Align the images
when align is complete the results make me so sad------4/100cams what the… :o :o :o
as you can see,so dark
even I try mask the background to the white still not work
Lots of control points?
Or maybe make a super contrasted version of the pics and let it do the alignment on those.
Then swap in the normal pics for texturing (I think RC has a do/don’t use for alignment and preferred/do/don’t use for texturing flags)
If you were going to do a lot of it, maybe get a depth scanner to help with the modelling (model on lidar/ir depth then texture with rgb images). There is a cute ipad scanner (structure.io?) that might give you interesting results. Of course there are ipad apps that use the structure scanner to do some modelling on the ipad. https://structure.io/use/3d-scanning
I haven’t used one… but looks like a nice system. There is also the David scanner system that projects patterns onto the model to capture shapes (now owned by HP but hardware for it is open platform)
Good luck
Jennifer
You are trying to align something that has very few features.
That will not work.
If you have a fixed camera rig you can do the following:
Put an object there that has a lot of features.
Take the pictures.
Align the object.
Export your alignment.
Take pictures of the target person.
Import alignment.
Reconstruct.
Jennifer Cross wrote:
Lots of control points?
Or maybe make a super contrasted version of the pics and let it do the alignment on those.
Then swap in the normal pics for texturing (I think RC has a do/don’t use for alignment and preferred/do/don’t use for texturing flags)If you were going to do a lot of it, maybe get a depth scanner to help with the modelling (model on lidar/ir depth then texture with rgb images). There is a cute ipad scanner (structure.io?) that might give you interesting results. Of course there are ipad apps that use the structure scanner to do some modelling on the ipad. https://structure.io/use/3d-scanning
I haven’t used one… but looks like a nice system. There is also the David scanner system that projects patterns onto the model to capture shapes (now owned by HP but hardware for it is open platform)
Good luck
Jennifer
Hi Jennifer
Control points not work. 
I have other pictures is a girl wearing Sparkling different colors gem on black skirt。 So I align images Calualte model , I found except the black part in skirt of all the other are built successfully, even the gems on the skirt. except the black part…
I think is a super contrasted version means black and white right ?
about ipad… i’ll try
thank you jennifer
Hi gw950619
As other pointed to the solution, you need to use ControlPoints or XMPs ( transfering properly solved camera params from reference scann ) but even then reconstructing this sort of dataset wil be problematic as is outisde of photogrammetry possibilities. I see you have RAW files used there. send me the dataset so can take a look on waht is possible to recover from the RAW files. it can help a bit. Contact me on my email.
For longtherm solution, you need to have patterns projected on the subject to solve too dark-bright featureless subjects.
gw950619 wrote:
Jennifer Cross wrote:
Lots of control points?
Or maybe make a super contrasted version of the pics and let it do the alignment on those.
Then swap in the normal pics for texturing (I think RC has a do/don’t use for alignment and preferred/do/don’t use for texturing flags)If you were going to do a lot of it, maybe get a depth scanner to help with the modelling (model on lidar/ir depth then texture with rgb images). There is a cute ipad scanner (structure.io?) that might give you interesting results. Of course there are ipad apps that use the structure scanner to do some modelling on the ipad. https://structure.io/use/3d-scanning
I haven’t used one… but looks like a nice system. There is also the David scanner system that projects patterns onto the model to capture shapes (now owned by HP but hardware for it is open platform)
Good luck
JenniferHi Jennifer
Control points not work.
You might just need more of them - it took 6-7 to re-attach a dangling image on a recent test run
gw950619 wrote:
I have other pictures is a girl wearing Sparkling different colors gem on black skirt。 So I align images Calualte model , I found except the black part in skirt of all the other are built successfully, even the gems on the skirt. except the black part…
I think is a super contrasted version means black and white right ?
about ipad… i’ll try
Not so much just contrasty, but play with the colour levels to give the software something to grab onto
Here is your image tweeking the black levels up using bright/contrast
and another using GIMP’s curve tool to push the blacks up and leave the rest mostly alone
GIMP is scriptable so you could apply the curves to all pictures in a folder…
Just throwing out ideas… hope something is helpful in there!
Jennifer