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Face and Body Scanning / Deleted
« on: March 11, 2020, 04:33:45 AM »
Deleted
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I haven't used zbrush, so only guessing!
If you have 'decimated and denoised' in zbrush then presumably you will have lost the uv mapping that was originally generated when you first textured the mesh in photoscan.
To generate a new uv map, you will have to either:
1. import the 'decimated and denoised' mesh into photoscan and generate texture using generic mapping (this will generate a new generic uv map for your 'decimated and denoised' mesh
2. do some uv unwrapping of the 'decimated and denoised' mesh in zbrush
3. uv unwrap in some other software
If you do #2 or #3 then you still need to do #1 but using 'keep uv' instead of 'generic' mapping.
You could try disabling them rather than removing them ... or possibly move them to a new chunk and see if they align to each other, then align and merge the two chunks.
try mask out all except the head..... and report back....I have to mask all 120 photos???
To mask quickly, create a quick mesh of the head only on low settings, and then Tools->Imprt Mask -> from model. Then try aligning the photos again with 'constrain features by mask'.
This might give you a better alignment so you can create a better mesh and then import even better masks from that model.
Hello 3D_Scan_Fan,
I think that the following video would be useful for you:
http://www.zbrushworkshops.com/content/jeffrey-wilsons-photogrammetry-webinar-replay
When you start an alignment from scratch there is no information about camera positions. If you've already run the process once, then you are starting with the previously calculated camera positions. You can reset the cameras via a right click on the camera folder.
If you get what appear to be multiple copies of part of the model, then you have a couple of groups of cameras that have aligned amongst themselves, but there are no links between the groups. Adding control points in those areas should help adjust the camera positions.
Instable alignment results is usually caused by the input data problems, like lack of overlap, insufficient texture pattern on the object being scanned and/or quality of images.
If you can post some examples of the input images and correct/bad alignment results for the same project, it will be helpful.