Hi everyone, I have a pop 1 and a range 1, with the latter I can’t get a decent scan of my face, with the pop 1 I can do it without problems, I also bought the tablets to calibrate it but nothing. Could it be defective? I can scan other objects but not people’s faces. Do you have any suggestions?
Hi Giovanni, that is really strange because Range 1 is amazing in scanning faces .
From your preview it looks like an issue with calibration.
What calibration boards you purchased for Range 1 ?
I suggest you make marker test scan and see if any overlap happens or marker are not recognized, it will give you an idea if you need calibration .
Also make sure you have lots of light shinning on the boards and best beging the scanner , not use with evening indoor light , wait for the day , Range 1 calibration needs lots of light since it don’t have LED .
Let me know then I can give you another tip after , if you don’t succeed.
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Just use marker mode and see if the markers are captured well and full visible in the viewport while scanning , if you get error like not enough markers it may indicate that you need to recalibrate .
Also please recalibrate again and use lots of day light while doing it , not evening ambient light . Range 1 needs plenty of light for proper calibration .
Let me know after you calibrate it with extra light .
Also if you have older version of Revo Scan 5.4.9 I would suggest to use this one for calibration .
I had problems with losing tracking with faces.
One of the nice techs advised me to scan in the range of “good”, and I stopped losing tracking.
However whenever you scan hair all bets are off.
If your subject is bald, no problems, if you need hair, just download a hair model.
This may not directly be related to your issue, but having scanned a ton of faces at my job, the one thing I can say is that faces is one of the more difficult things to scan for a multitude of reasons. We use an Artec Eva for all our head scans at work and the two issues we run into primarily is skin translucency diffracting the structured light pattern and the fact subjects move too much during scanning. Even if the subject is trying to stay absolutely still, there is a lot of micro movements that are occurring to keep your head in place, to mitigate that I would suggest having something you can have your subject rest their head against that way they can stay stationary. As for translucency, you can probably knock that down by dusting baby powder on the face to increase the skins reflectivity and reduce the diffraction of the structured light pattern. Other issues I have found that can be problematic is the max scanning area of the scanner itself. The Eva’s focal distance sweet spot is about 3 feet or 1 meter, which allows it to capture the entire head in a single frame. Whereas most of Revopoint’s scanners require you to be much closer in order to be in optimal range. At minimum to scan a head, your scanner should be able to capture both the front of the ear and the corner of the eye in one shot, if it’s capable of that, then its able to track enough features per frame to adequately register during the fusion process. Then the only place that would give you a challenge is the forehead since its is the most featureless part of the human face (unless your subject is graced with a lot of widsom lines ), adding a marker here that is easily removeable in scan clean up would help resolve any tracking issues with this area. Not sure if any of this helps but it’s tricks I’ve learned over the years to get a better scan, short of having a plaster casting of the subjects face done that is, but not everyone has access to a SFX shop. 
Also, bare in mind if you’re trying to scan yourself, you’re fighting an uphill battle. I’m not saying its impossible, as there is plenty of proof out there of people successfully doing self scans, but the very act of trying to scan yourself destabilizes you as a subject. your arm is attached to your shoulder which is attached to your neck, by moving the scanner around to scan your face your are causing the the minute muscle movements I mentioned earlier which will cause artifacts in your scan especially around the nose and brow area.
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