ANSI/NIST-ITL 1-2011 - NIST Visual Image Processing Group ...

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FeaturePoint IDANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationMPEG4FeaturePointAnthropometricPoint Namels 8.1 labiale (orlabrale) superiusli 8.2 labiale (orlabrale) inferiusch 8.38.4cheilionDescriptionThe midpoint of the upper vermillion lineThe midpoint of the lower vermillion lineThe point located at each labial commissuresto Stomion The imaginary point at the crossing of the vertical facialmidline and the horizontal labial fissure between gentlyclosed lips, with teeth shut in the natural positionsa 10.110.2superauraleThe highest point of the free margin of the auriclesba 10.510.6subauraleThe lowest point of the free margin of the ear lobepra 10.9 10.10 preaurale The most anterior point on the ear, located just in front ofthe helix attachment to the headpa postaurale The most postrerior point on the free margin of the earobs 10.310.4otobasionsuperiousThe point of attachment of the helix in the temporal regionobiotobasioninfriousThe point of attachment of the ear lobe to the cheekpo porion (soft) The highest point of the upper margin of the cutaneousauditory meatust tragion The notch on the upper margin of the tragus156DRAFT 2
ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationThe anthropometric landmark code has the format A.B. A specifies the globallandmark of the face to which this landmark belongs, such as nose, mount, etc.B specifies the particular point. In case a Landmark Point has two symmetricalentities (left and right) the right entity always has a greater and even minor codevalue. All landmark points from the left part of the face have odd minor codes,and those from the right part have even minor codes. Both A and B are in therange from 1 to 15. Hence the code A*16 + B is written to the 1 byte landmarkpoint code field, e.g. Feature Point Code ID P or Feature Point Code 3.6 iswritten as 54.The error of an anthropometric 3D landmark point location should be no greaterthan 3mm. The point shall withstand from the nearest point on the surface nofurther than 3mm. The point on the surface is a vertex, or a point on an edge, ora point on a face of the surface.The Z field is not used if the Landmark Point Type is equal to MPEG4 feature oranthropometric 2D landmark. In case the Landmark Point Type equalsanthropometric 3D landmark this field along with the horizontal and verticalpositions denotes the coordinates of the landmark point in the 3D Cartesiancoordinate system. The metric coordinates of 3D landmarks shall be obtained bymultiplying the X, Y, and Z coordinates by a fixed scale of 0.02mm. Note, that theLandmark Point Type field codes the type of the Landmark Point and determinesthe interpretation of the Z coordinate.14.28 Field 10.030: Device monitoring mode / DMMThis optional field provides information describing the level of human monitoringfor the face image capture device. This field will contain an entry from Table 56to indicate the monitoring mode of the biometric sample capture device.CONDITIONTable 56 Device monitoring modesDESCRIPTIONCONTROLLED Operator physically controls the subject to acquirebiometric sampleASSISTEDOBSERVEDPerson available to provide assistance to subjectsubmitting the biometricPerson present to observe operation of the device butprovides no assistanceUNATTENDED No one present to observe or provide assistanceUNKNOWNNo information is known157DRAFT 2
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