Design and learn distinctive features from pore-scale facial keypoints

Dong Li, Kin Man Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


Establishing correct correspondences between two faces with different viewpoints has played an important role in 3D face reconstruction and other computer-vision applications. Usually, face images are considered to lack sufficient distinctive features to establish a large number of correspondences on uncalibrated images. In this paper, we investigate pore-scale facial features, which are formed from pores, fine wrinkles, and hair. These features have many characteristics that make them suitable for matching facial images under different variations. Using both biological observation and computer-vision consideration, a new framework is devised for pore-scale facial-feature extraction and matching. The matching difficulty under various skin appearances of different subjects and imaging distortion is also analyzed. For further improving the matching performance and tackling distortions such as varying illuminations and unfocused blurring, a pore-to-pore correspondences dataset is established for training a more distinctive and compact descriptor. Experiments are conducted on a face database containing 105 subjects, and the results prove that the pore-scale features are highly distinctive; face images with a minimum resolution of 600×700 (0.4 mega) pixels contain sufficient details to perform a reliable matching in different poses. Generally, our algorithm can establish between 500 and 2000 correct correspondences on a pair of uncalibrated face images of the same person. Furthermore, the proposed methods can be applied to face recognition, 3D reconstruction, etc.
Original languageEnglish
Pages (from-to)732-745
Number of pages14
JournalPattern Recognition
Issue number3
Publication statusPublished - 1 Jan 2015


  • Face matching
  • Face recognition
  • Face reconstruction
  • Feature extraction
  • Pore-scale facial feature

ASJC Scopus subject areas

  • Software
  • Artificial Intelligence
  • Computer Vision and Pattern Recognition
  • Signal Processing


Dive into the research topics of 'Design and learn distinctive features from pore-scale facial keypoints'. Together they form a unique fingerprint.

Cite this