Texas Big Face - 3D Face Projection How To

Step 4 Step 3: Camera and Projector Alignment

The final step in facial projection is to align the projected face to the target face.  The camera should already be aligned in the jig as seen here in figure 1.1., so all that remains is aligning the face on the target.  Figure 1.3 shows a person facing the camera with face in the jig. Camera is shown attached & aligned with the jig.
 
First, size the projection so that the top of the head and the bottom of the chin match that of the target.  You may need to adjust the focus and zoom on the camera, and/or the throw of the projector, until you dial the image in correctly.  It is best to project directly onto the face from the same height.  Projecting upward or from the side may or may not produce favorable results.  

Next, align the facial features of the projection to those of the statue.  This should either be the eyes, the tip of the nose, of wherever you placed your tape guides on the "monitor".  Superimpose as many points of reference of the projection onto the points of reference on the target.  The eyes should line up with the eyes, the nose with the nose, the lips with the lips, etc.  Every face has different proportions, so getting close is usually good enough.  

Once you are aligned, try not to further adjust anything else.  Let the jig [1] and person projecting their face (using the "monitor's" taped-off guides) do their job.  Everyone's face has slightly different proportions, so mileage will vary.  We have found that constant tweaking for each new face in the jig will slow down the overall process and is not as fun as just going with the flow.