A number of pixels in a face image clearly corresponds to some extract physiological semantics, such as the eye corners, eye centers, mouth corners, nose tips, etc. These feature points are called facial landmarks. They are generally used to align different face images for accurate matching.
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(2009). Facial Landmarks. In: Li, S.Z., Jain, A. (eds) Encyclopedia of Biometrics. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-73003-5_810
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DOI: https://doi.org/10.1007/978-0-387-73003-5_810
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