Shooting Head scans this weekend and will be sharing my set up as well as the hardware and costs associations
I am almost done setting up my mobile head scan rig with 5 cameras to try and compete with a 32 camera set up.
Reason. Cost! and mobility!! Can I get an effective pipeline and level of quality from 5 cameras on one tripod? Being able to be mobile instead or requiring a model to come to a space has a big advantage both on time and finance the issues is can I get a pro level result at roughly 1/7th the cost?
Below is an initial quick test i played with in zbrush while adjusting camera angles. This was a fast shot of my girlfriend from 25 shots.
Raw out of reality capture minus the symmetry for a bad lens on the right side. This is without cross polarizing if you want to follow
the build and changes I make along with details for the mobile rig check the thread next week here:
Light Kit : Strobe or Flash:
2 profoto D1
A cheap, Mobile, and effective alternative is Youngnuo YN685 wireless Flash
https://www.bhphotovideo.com/c/product/1247484-REG/yongnuo_yn685_n_yn685_wireless_ttl_speedlite.html?ap=y&gclid=CjwKCAjwtvnbBRA5EiwAcRvnptYgZKU5zZv0N2cbznZjToo_EGWLsZzbkUuRxkrC3hWlvq_LZdjCfRoC6qoQAvD_BwE&smp=y
These will also save a ton for cross polarizing film. Simply tape it directly over the flash total cost for film this way is about 15 to 19$
Polarizing Film and Modifiers:
Profoto Zoom reflector modifiers
I have some great soft-box and beauty dish modifiers. The photographer in me wants to use these however for texture acquisition I think the value is lost
and the cost of finding and buying polarizing film large enough to cover the soft box goes through the roof into hundreds of dollars.
Using Zoom modifiers should give me enough heat dissipation to use small polorizing film sheets and allow me to pick up for under $20
Downside is that the zoom reflectors will cast a harsher light on the model creating shadows so shooting through a scrim may be a solution if it doesn’t de -polorize the light.
You can pick up used zoom reflectors off ebay for under 100$ but id suggest waiting on my test results before grabbing some in you are interested. Polarizing film is about $15 to 18 a foot but from what I have found so far that’s only up to 17 inches wide. Personally I uses a 3 foot octobox and beauty dish as well as a 1 x 4 softbox so picking up 2 zoom reflectors actually saves significantly here.
This weekends test session will be to see how effective using these zoom modifiers will work.
For answers like this I turn to my favorite photogrammetry group you may want to check out here:
https://www.facebook.com/groups/3dphotogrammetry/?ref=group_header
Lens:
One of the biggest cost factors is cameras but you can always rent as a solution here. I find the best value so far in photogrammetry is in investing in great lenses having said that for polarizing lens filters I’m going with mostly amazon basics that are about 1/5th the price 15 to 25 vs 85 to 100+ each again this is a part of the coming weeks test to see if lower quality lens filters make the cut.
I will post screen grabs from reality capture sometime next week for before and after. If you are interested you can check out this great PDF recommended by Eugene Fokin here https://docs.sharktacos.com/photography/xpol.html