CALIBRATION CONTROLS: Preview: You can specify an intensity value for the previewer and calibration process between 0 and 255. This way, if you use a white grid, you can set the camera iris for say an intensity of 140 in the previewer. When you calibrate, the projectors maximum intensity will be 140 instead of what is set in the Projector Control dialog. However, when you scan, the max intensity in the Projector Control dialog will be used. Thus, once you calibrate, you should turn this feature off. It allows you to set the iris by the calibration grid which is white and then scan things like faces that might be much darker without reseting the iris. Calibration Method: Hall is the present default calibration method based on perspective matrix coefficients.