1. The 4.0 version introduces a new high-quality algorithm for facial feature detection. The new version detects 66 facial features (see the Detected Facial Features chapter).
2. The 4.0 version enhances the accuracy of inner facial feature (nose, eyes, and mouth) detection. To make this enhancement possible, facial feature points of the upper part of the head were removed. The following facial feature points (and their corresponding constants) were removed:
FSDKP_FACE_CONTOUR3, FSDKP_FACE_CONTOUR4,
FSDKP_FACE_CONTOUR5, FSDKP_FACE_CONTOUR6,
FSDKP_FACE_CONTOUR7, FSDKP_FACE_CONTOUR8,
FSDKP_FACE_CONTOUR9, FSDKP_FACE_CONTOUR10,
FSDKP_FACE_CONTOUR11
If you were using some of these features, you may calculate their approximate positions by relying on the coordinates of other facial features.
3. You may find that FaceSDK consumes more CPU resources than the previous version. The SDK uses all available CPU cores for face detection and recognition functions, achieving higher speed. If you need the SDK to use just a single core (as in the previous version), use the FSDK_SetNumThreads function.
