FIDENTIS DATABASE

The FIDENTIS 3D Face Database (F3D-FD, FIDENTIS Database) a biometric database of human 3D faces and associated documentation accessible via web-based environment. The objective of the database is to serve as a reference sample mapping inter- or intra-population variation for the purpose of clinical diagnostics and advancing research in biomedical areas and to facilitate research and development in the field of 3D face recognition by providing an access to large-scale quantitative data.

DATABASE APPLICATION

The database serves as a stand-alone reference sample mapping facial morphology of current Czech population and for analysis of age changes. Generally, the database can be used not only for scientific purposes but also in clinical or applied areas, such as orthodontics, biometrics or forensic sciences.

MODELS AVAILABILITY

Given the ID-sensitive biometric nature, the full access to database is restricted to authorized personnel only. A stripped-down public version of the database is available upon request and signing a legally binding agreement. At the moment, a set of 200 models is being prepared for this publication.

MODELS FORMAT

The models in the database are processed and available in *obj format which can be easily converted into other formats, such as *ply or *stl.

FIDENTIS ANALYST INTEGRATION

Within the FIDENTIS project the database is also integrated into developed FIDENTIS Analyst software, where its use is linked to database-specific software functions. The models are used for validating reliability of identification algorithms based on human face. For example it could serve for verification if two models of the same individual acquired by different device or with time lapse can be matched reliably.

Database structure

The database contains these types of 3D data. Suffix-appended scan IDs refer to the type accordingly.

Raw edited models

(are original partial 3D scans (frontal and two semi-lateral) with high definition texture cropped manually of background and additional noise including distorted polygons or texture imperfections (available for Vectra M1 and Vectra H1 only, 3 partial models per face model is included). Labeling: ID_L, ID_R, ID_F for left semi-lateral, right semi-lateral and frontal scans.

Raw merged models

include complete one-piece face scans (with ears) as created by a third party application (Vectra M1) or Vectra Mirror scripts (Vectra XT, Vectra H1); posterior parts of model have been trimmed; the scans have been edited for polygon overlapping, cleaned and translated to the origin of coordinate system (placed at tip of the nose). Labeling: ID_CA.

Edited models

are uniformly trimmed models that encompass frontal parts of the face without ears; the scans have been translated to the origin of coordinate system (placed at tip of the nose) (available for Vectra M1, H1 and XT). Labeling: ID_ECA.

Note that raw models (original unedited scans) including technical noise and unwanted background are not included into the database.

Landmarks

are sets of 42 landmarks collected for each scan in “raw merged” and “edited” categories. Data acquisition was conducted according to definitions as stated below. For the “edited models” category, landmarks located beyond the trimmed line of the face lose the attachment to the mesh surface and are disabled by default (i.e., present in the file but invisible on the mesh).

Associated documentation

is a list of specifications attached to a 3D model featuring information regarding the recording device, data type (raw, edited, merged…), mesh resolution, texture (present, absent, partial), person’s sex, age1 (a number which equals to the date of birth extracted from the date of scanning), age2 (a number of years from birth to the last birthday), nationality, residence, highest achieved level of education.

Technical specifications

3D models included in the database are principally available in “obj” format. The texture is presented in “jpg” format with resolution of 12Mpx in size (horizontal and vertical) and 96 dpi. The number of vertices is variable and dependent on the acquisition device.

Landmarks are presented in “xml” format which contains labels of landmarks, values of X, Y, Z-coordinates and status for a given mesh (enabled/disabled).

Access

Biometric data in the database are protected under Act No. 101/2000 Coll., on the protection of personal data. Full access to the database is restricted to members of the Fidentis research group exclusively. Two secured levels of the database are available to the public by means of secure authentication.

Promo Fidentis 3D Face Database (Promo Fidentis Data)

The Promo Fidentis database is a set of exemplary 3D scans illustrating the content of the database. It composes of examples to the original scanned data, associated documentation and generated average models to demographic groups (sex, nationality, age groups). Sample data to single-scan and multi-scan entries are provided. Access of granted upon request. Interested party must register by means of filling a registration form and follow the Terms of Use. Registered users are authorized to access the Promo Fidentis Database unlimited times.

Extended Public Fidentis 3D Face Database

The Extended Public Fidentis 3D Face Database is a stripped down licensed version of the database and associated documentation. The accessible portion of the database composes of 200 Vectra M1-generated facial scans of adult individuals, of whom 121 are females, 79 are males, associated sets of landmarks and documentation. In order to grant the permit to access the licensed dataset applicants are asked to present their project or to specify intentions adequately to the research team leaders and to sign the License Agreement for the Extended Public Fidentis 3D Face Database.

How to participate

Fidentis project representatives and team members strongly encourage individuals or groups to participate in data collection directed at enlarging the database. 3D face scanning is a quick safe procedure which poses no health risks. Upon participating every volunteer is granted a PDF file containing his/her 3D scan and a link for downloading an interactive smartphone application featuring the 3D scan. Data acquisition is principally conducted at the Laboratory of Morphology and Forensic Anthropology, Brno, Czech Republic, but scanning at a remote location can be also arranged. Interested parties should contact the Fidentis team at lamorfa@fidentis.cz

Demographic profile of the database

To date, 3D face scans from 2,029 participants have been collected and listed in the database. In majority, individuals are being recruited from the present-day Czech population. Adult participants originate mostly from cohorts of undergraduate and post-graduate students enrolled at the project’s home university (Masaryk University, Brno, Czech Republic). Sub-adult participants have been added courtesy of several local elementary schools. Prior to being scanned all adult participants are asked to sign an informed consent form. On behalf of minors, forms are signed by their parents or legal guardians.

NATIONALITY – ADULTS
AGE DISTRIBUTION
HIGHEST LEVEL OF EDUCATION ACHIEVED – adult individuals

Data examples

Landmark definitions

ORBITAL REGION
  • Exocanthion (ex)*
    The point at the outer commissure of the eye where the outer margin of the upper eyelid meets the lower eyelid. If the precise spot cannot be found then the location is in the intersection of imaginary lines obtained by prolonging the eyelid margins. The point is bilateral.
  • Endocanthion (en)*
    The point at the inner commissure of the eye where the inner margin of the upper eyelid meets the lower eyelid. It is the most medial point at the lacrimal caruncle. In case a skin fold is present (epicanthus, plica mongolica, plica marginalis fetis) and the point is not visible, by Kolar and Salter’s recommendations (1997) the landmark is defined as the point where the fold crosses the lower eyelid. In this case the points are not homologous. The point is bilateral.
  • Palpebra superior (pas)*
    The point which is located at the intersection of a line going through the eye center (parallel to the mid-sagittal plane) and the caudal (lower) margin of the upper eyelid. The eye center is defined as the half distance between exocanthion and endocanthion. Together with the palpebra inferior point the landmark determines the eye height. The point is bilateral
  • Palpebra inferior (pai)*
    The point which is located at the intersection of a line going through the eye center (parallel to the mid-sagittal plane) and the upper margin of the lower eyelid. Together with the palpebra superior point the landmark determines the eye height. The point is bilateral.
NASAL REGION
  • Glabella (g)*
    The outermost midline point between the eyebrows.
  • Subnasale (sn)*
    The lowest posterior midline point at the angle formed by the outline of nasal septum and upper lip.
  • Alare (al)*
    The most lateral anterior point of wing of the nose. The point is bilateral.
  • Nasion (n)*
    The point in the midline on the nasal root, the deepest point of the nasal root.
  • Pronasale (prn)
    The most anterior midline point of the nasal tip with the head positioned in the Frankfurt horizontal plane. If the nasal tip is bifid the point is located in the mid-sagittal plane between the elevations.
Mandibular region and lower part of the face
  • Gnathion (gn)*
    The most anterior inferior point located in the midline at the lower margin of the mandible.
  • Gonion I (goI)*
    The lateral inferior point located at the mandibular angle. The point is bilateral. (Digitized on texture-less 3D models).
  • Zygion II (zy)*
    The most lateral point of the face located on line running through the two eye centers. From lateral view the point is located at the extension to the posterior eyebrow margin (alternatively, at the eyebrow margin). The eye centers are defined as intersection of line connecting exo/endocanthion and of palpebra superior/inferior. The point is bilateral.
  • Pogonion (pg)*
    The most anterior midline point located at the chin with the head positioned in the Frankfurt horizontal plane.
ORAL REGION
  • Labrale superius (ls)
    The midpoint of the upper vermilion line. From lateral view this point is mostly covered by other parts of the lips. In case of bow-shaped upper vermilion the point is located in the mid-distance between cheilion points. (by Farkas 1994, modified)
  • Stomion (sto)*
    The point located at the intersection of the closed mouth fissure and the midline. If the mouth is open the point is localized at the lower margin of the upper lip.
  • Labrale inferius (li)
    The most anterior midline point at the lower margin of lower vermilion. (by Fetter 1967, modified).
  • Cheilion (ch)*
    The point located at the labial commissure. The point is bilateral.
  • Crista philtri (cp)*
    The point located at the place where the line, which is going through the highest margins of the upper vermilion, meets the lower margin of crista philtri. The point is bilateral.
  • Sublabiale (sl)*
    The midpoint of the mentolabial sulcus (the ridge between the chin and the lower lip, not the vermilion). The point is located at the flexion point of the concavity.
AURICULAR REGION
  • Tragion (t)*
    The point located at the upper margin of tragus in the little notch where the cartilage is attached with the head positioned in the Frankfurt horizontal place. The point is bilateral.
  • Superaurale (sa)*
    The most superior point located at the upper margin of the auricle with the head positioned in the Frankfurt horizontal plane. The point is bilateral.
  • Subaurale (sba)
    The most inferior point located at the lower margin of the earlobe with the head positioned in the Frankfurt horizontal plane. If the “attached earlobe” appearance is present the point is identical to the Otobasion inferius point. The point is bilateral.
  • Postaurale (pa)*
    The most posterior point of the posterior margin of the auricle (when the head is positioned in the Frankfurt horizontal plane). The point is bilateral.
  • Otobasion superius (obs)*
    The point where the upper margin of the auricle attaches to the head. The point is bilateral.
  • Otobasion inferius (obi)*
    The point where the earlobe attaches to the cheek skin (lower attachment). The point is bilateral.
  • Praeaurale (pra)*
    The point at the intersection of the line between Otobasion superius and Otobasion inferius points, at the level of the Postaurale point. The point is bilateral.

* adapted from Fetter (1967)

References

Farkas, L. G. (1994): Examination. In Farkas, L. G. (ed.). Anthropometry of the head and face. 2nd ed. New York: Raven Press, p. 3-56.

Fetter, V. et al. (1967): Antropologie. 1st edition. Praha: Academia. 706 s.

Kolar, JC and Salter, EM (1997): Craniofacial Anthropometry. Practical measurement of the head and face for clinical, surgical and research use. Charles C Thomas: Springfield, 334 pp. Cited by https://www.facebase.org/facial_norms/notes/6262

The project has been approved by the Ethics Committee at Masaryk University.