I read its ability to use the built-in Android face detector to find the position of faces in a bitmap. Does anyone know any examples of this using the camera as an input?
This is possible using the face detection APIs in ICS. Refer to the camera section on this page: http://developer.android.com/sdk/android-4.0.html
You must register a FaceDetectionListener and then call camera.startFaceDetection() . Please read the link above for more details.
FaceDetectionListener
camera.startFaceDetection()
I wrote some code examples. It's not perfect since it worked, but the face detection bit works just fine:
https://docs.google.com/open?id=0B2Nu5U2Cz81qZExGQ25sWVdRd21IOExUUTZsZzFoZw
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