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ASTM E3149-18

(Guide)

Standard Guide for Facial Image Comparison Feature List for Morphological Analysis

Standard Guide for Facial Image Comparison Feature List for Morphological Analysis

SIGNIFICANCE AND USE
4.1 Morphological analysis used for facial comparison should utilize consistent terminology and methodology. This guide provides a standard set of facial components, characteristics, and descriptors to be used as a framework in conjunction with a systematic method of analysis for facial image comparison.  
4.2 The order of the facial components in this set is presented from the top of the face to the bottom, not in order of importance or priority.  
4.3 Within this guide, the term “face” generally refers to the face, head, and neck inclusively unless specified otherwise.  
4.4 There are several instances in this guide in which the term “distance” or “approximate distance” is used. When this term is used in this guide, it does not mean to imply that the precise value of this dimension shall be determined, but rather the relative size of this dimension compared to the overall width or height of the face, if not otherwise specified. In this guide, it is recommended that photoanthropometry not be used at all because of its limitations.
SCOPE
1.1 This guide defines a set of facial components, characteristics, and descriptors to be considered during a morphological facial comparison (see FISWG Best Practices for Facial Image Comparison Feature List for Morphological Analysis).  
1.2 This set of facial components, characteristics, and descriptors describes the facial features that may be visible and comparable between images.  
1.3 This guide defines a standard set of facial components, characteristics, and descriptors that should be used for facial comparison.  
1.4 This guide does not define the comparison process itself, just the feature set to be used during such comparisons.  
1.5 This guide does not define a classification system to constrain how those descriptors shall be articulated as applied to samples.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Jul-2018
ICS
35.240.15 - Identification cards. Chip cards. Biometrics
Technical Committee
E30 - Forensic Sciences
Drafting Committee
E30.12 - Digital and Multimedia Evidence
Current Stage
Ref Project

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ASTM E3149-18 - Standard Guide for Facial Image Comparison Feature List for Morphological Analysis
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E3149 − 18 An American National Standard
Standard Guide for
Facial Image Comparison Feature List for Morphological
1
Analysis
This standard is issued under the fixed designation E3149; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This guide defines a set of facial components, 3.1 Definitions:
characteristics, and descriptors to be considered during a 3.1.1 characteristic descriptors, n—minutiae of the compo-
morphological facial comparison (see FISWG Best Practices nent characteristics.
for Facial Image Comparison Feature List for Morphological
3.1.2 component characteristics, n—detailed features of the
Analysis).
facial components.
1.2 This set of facial components, characteristics, and de-
3.1.3 facial components, n—gross features considered in
scriptors describes the facial features that may be visible and
virtually all comparisons.
comparable between images.
4. Significance and Use
1.3 This guide defines a standard set of facial components,
characteristics, and descriptors that should be used for facial
4.1 Morphological analysis used for facial comparison
comparison.
should utilize consistent terminology and methodology. This
guide provides a standard set of facial components,
1.4 Thisguidedoesnotdefinethecomparisonprocessitself,
characteristics, and descriptors to be used as a framework in
just the feature set to be used during such comparisons.
conjunction with a systematic method of analysis for facial
1.5 This guide does not define a classification system to
image comparison.
constrain how those descriptors shall be articulated as applied
4.2 The order of the facial components in this set is
to samples.
presented from the top of the face to the bottom, not in order
1.6 This standard does not purport to address all of the
of importance or priority.
safety concerns, if any, associated with its use. It is the
4.3 Within this guide, the term “face” generally refers to the
responsibility of the user of this standard to establish appro-
face, head, and neck inclusively unless specified otherwise.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.4 There are several instances in this guide in which the
1.7 This international standard was developed in accor-
term “distance” or “approximate distance” is used. When this
dance with internationally recognized principles on standard-
term is used in this guide, it does not mean to imply that the
ization established in the Decision on Principles for the
precise value of this dimension shall be determined, but rather
Development of International Standards, Guides and Recom-
the relative size of this dimension compared to the overall
mendations issued by the World Trade Organization Technical
width or height of the face, if not otherwise specified. In this
Barriers to Trade (TBT) Committee.
guide, it is recommended that photoanthropometry not be used
at all because of its limitations.
2. Referenced Documents
2 5. Facial Feature List
2.1 FISWG Standards:
FISWG Best Practices for Facial Image Comparison Feature 5.1 The following feature list contains nineteen (19) facial
List for Morphological Analysis components, each of which is further divided into two levels of
detail.
5.2 The facial components are gross features to be consid-
1
This guide is under the jurisdiction of ASTM Committee E30 on Forensic
ered in virtually all comparisons. The tables in 5.3 further
Sciences and is the direct responsibility of Subcommittee E30.12 on Digital and
expands each facial component into a set of component
Multimedia Evidence.
Current edition approved Aug. 1, 2018. Published August 2018. DOI: 10.1520/
characteristics and their associated characteristic descriptors.
E3149-18.
2
Available from Facial Identification Scientific Working Group (FISWG), NOTE1—Inthefigures,dottedlinesindicatetheposition,orientation,or
http://www.fiswg.org/documents. location of the feature, or combination thereof.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E3149 − 18
TABLE 4 Hair
5.3 Facial Components—The human facial components are
Component Characteristics Characteristic Descriptors
multifaceted and when imaging conditions allow, it may be
Hair  Shape/spatial distribution (including
possible to subdiv
...

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