By default Identifier ships with a CPU face-detector named FaceDetector2. This Face Detector is CPU based and works down to a minimum face size of 80x80 pixels. It is extremely well tested and robust.
However, from Identifier 1.3.X there is a new GPU based face detector, currently in beta. This is superior face-detector and will detect faces down to 60x60 pixels. This will be the default face-detector in Identifier 1.4 and above.
To use the new face-detector you need to add the following value to the registry HKEY_CURRENT_USER\Software\Digital Barriers\SmartVis Identifier to FaceDetector=FaceDetector5.
Stop Identifier.
Start regedit as Administrator.
Navigate to and select HKEY_CURRENT_USER\Software\Digital Barriers\SmartVis Identifier.
Right click on SmartVis Identifier -> New -> String Value.
Enter name for the key FaceDetector
Double click on the key and change value to FaceDetector5
Next you need to add the threshold that FaceDetector5 uses. For this you need to add another new key/value pair.
Finally, restart Identifier.
To switch back to the original Face Detector simply delete these registry keys and restart Identifier.