ISO/IEC 24779-4:2017
(Main)Information technology — Cross-jurisdictional and societal aspects of implementation of biometric technologies — Pictograms, icons and symbols for use with biometric systems — Part 4: Fingerprint applications
Information technology — Cross-jurisdictional and societal aspects of implementation of biometric technologies — Pictograms, icons and symbols for use with biometric systems — Part 4: Fingerprint applications
ISO/IEC 24779-4:2017 contains a set of symbols, icons and pictograms to help the general public understand the concepts and procedures for using electronic systems that collect and/or process fingerprints. This set of symbols, icons and pictograms is designed to be used to - identify the type of biometric device, - provide static instructions related to a fingerprint device, - display dynamic real-time information related to the fingerprint device, and - indicate the status of the fingerprint device. To provide this functionality, the set of symbols, icons and pictograms includes both directional symbols, icons and pictograms and real-time action or feedback symbols, icons and pictograms. The fingerprint device symbols, icons and pictograms can be categorized as - finger/hand general biometric, - kind of finger, four fingers or hand device, - finger/hand placement, - biometric position and impression which needs to be presented next, - hand orientation (switched hands), - finger/hand quality feedback, - press (more or less), - raise/lower angle, - finger/hand positioning, - hand/finger orientation, - necessary finger/hand movement (forward, backward, lateral), - rotation, - change angle, and - rolling finger(s). Although the symbols, icons and pictograms are presented individually, it is intended that the symbols, icons and pictograms be combined to fully illustrate the fingerprinting interaction. Alternative illustrations might be used; for example, in a customs or immigration environment, procedures constructed from the individual symbols, icons and pictograms could additionally be presented as - a series of posters while waiting to use the biometric system, - a series of transitional frames in a biometric booth, - an animated video or series of transitional frames while waiting to use the biometric system, and - instructional leaflets to read while waiting to use the biometric system. This multi-part International standard focuses on communication with the data capture subject. Operators could use this International standard, but they might need additional symbols and information.
Technologies de l'information — Aspects sociétaux et trans-juridictionnels de la mise en oeuvre des technologies biométriques — Pictogrammes, icônes et symboles pour utilisation avec les systèmes biométriques — Partie 4: Applications des empreintes digitales
General Information
Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 24779-4
First edition
2017-01
Information technology — Cross-
jurisdictional and societal aspects
of implementation of biometric
technologies — Pictograms, icons
and symbols for use with biometric
systems —
Part 4:
Fingerprint applications
Technologies de l’information — Aspects sociétaux et trans-
juridictionnels de la mise en oeuvre des technologies biométriques —
Pictogrammes, icônes et symboles pour utilisation avec les systèmes
biométriques —
Partie 4: Applications des empreintes digitales
Reference number
ISO/IEC 24779-4:2017(E)
©
ISO/IEC 2017
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ISO/IEC 24779-4:2017(E)
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ISO/IEC 24779-4:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Individual symbols, icons and pictograms . 2
4.1 General . 2
4.2 General symbol indicating fingerprint application . 2
4.3 Finger/hand placement. 3
4.4 Finger/hand quality feedback . 6
4.4.1 Press (more or less) . 6
4.4.2 Raise/lower angle . 7
5 Finger/hand positioning . 8
5.1 General . 8
5.2 Overlay visual guidance for finger/hand orientation . 9
5.3 Necessary finger/hand movement .11
5.3.1 Lateral movements .11
5.3.2 Forward/backward movements .14
5.4 Rotation .17
5.4.1 General.17
5.4.2 Rotate clockwise .17
5.4.3 Rotate Counter-Clockwise .18
5.5 Change angle .20
5.5.1 General.20
5.5.2 Raise/increase finger angles .20
5.5.3 Lower/decrease finger angles .22
5.6 Rolling finger(s) .23
5.7 Testing of hand-positioning visual guidance .24
Annex A (informative) Usability testing approach .25
Annex B (informative) Usability study of corrective visual guidance — Lateral, forward/
backward and rotating movements .30
Annex C (informative) Stepwise illustrations of the animation of Figure 30 .34
Bibliography .37
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ISO/IEC 24779-4:2017(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical
activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work. In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/IEC JTC1, Information technology, Subcommittee
SC 37, Biometrics.
A list of all parts in the ISO/IEC 24779 series can be found on the ISO website.
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ISO/IEC 24779-4:2017(E)
Introduction
A major public application of biometric recognition today is likely to be passports, but in the near
future, it is probable that biometric recognition will be used in other public devices. These devices will
be located in a variety of environments including unsupervised, a device supervised by an attendant or
only partly supervised — for example, an attendant supervising a number of devices or devices observed
via CCTV and an audio link. Language-independent pictograms, icons and symbols that indicate the
biometric modality and illustrate actions and behaviour required will be particularly important for
occasional users. In general, it is desirable for there to be more than one mode of presentation (e.g.
visual and audible or tactile). Only visual presentation is addressed in ISO/IEC 24779.
It is recommended that pictograms, icons and symbols are used in the enrolment process, so that the
subject becomes familiar with their meaning.
A standard family of pictograms, icons and symbols is required since in the absence of widely used
standard pictograms, icons and symbols, manufacturers will adopt their own proprietary printed
pictograms, icons and symbols for display on screens. This is likely to lead to confusion for public users
of self-service devices.
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INTERNATIONAL STANDARD ISO/IEC 24779-4:2017(E)
Information technology — Cross-jurisdictional and societal
aspects of implementation of biometric technologies —
Pictograms, icons and symbols for use with biometric
systems —
Part 4:
Fingerprint applications
1 Scope
This document contains a set of symbols, icons and pictograms to help the general public understand
the concepts and procedures for using electronic systems that collect and/or process fingerprints. This
set of symbols, icons and pictograms is designed to be used to
— identify the type of biometric device,
— provide static instructions related to a fingerprint device,
— display dynamic real-time information related to the fingerprint device, and
— indicate the status of the fingerprint device.
To provide this functionality, the set of symbols, icons and pictograms includes both directional
symbols, icons and pictograms and real-time action or feedback symbols, icons and pictograms. The
fingerprint device symbols, icons and pictograms can be categorized as
— finger/hand general biometric,
— kind of finger, four fingers or hand device,
— finger/hand placement,
— biometric position and impression which needs to be presented next,
— hand orientation (switched hands),
— finger/hand quality feedback,
— press (more or less),
— raise/lower angle,
— finger/hand positioning,
— hand/finger orientation,
— necessary finger/hand movement (forward, backward, lateral),
— rotation,
— change angle, and
— rolling finger(s).
Although the symbols, icons and pictograms are presented individually, it is intended that the symbols,
icons and pictograms be combined to fully illustrate the fingerprinting interaction.
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Alternative illustrations might be used; for example, in a customs or immigration environment,
procedures constructed from the individual symbols, icons and pictograms could additionally be
presented as
— a series of posters while waiting to use the biometric system,
— a series of transitional frames in a biometric booth,
— an animated video or series of transitional frames while waiting to use the biometric system, and
— instructional leaflets to read while waiting to use the biometric system.
This multi-part International standard focuses on communication with the data capture subject.
Operators could use this International standard, but they might need additional symbols and
information.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Individual symbols, icons and pictograms
4.1 General
The symbols and icons for aiding the fingerprint presentations are shown in the following figures.
1)
The symbols, icons and pictograms included in this clause have undergone usability testing . The
symbols, icons and pictograms were tested with representative users using two different methods.
The first round of testing used interviews. Using this approach, the interviewers described the context
in which the symbols, icons and pictograms were to be used and asked each participant to identify
the meaning of each symbol, icon or pictogram. This testing was followed by operational testing or
task-based testing where participants were asked to take actions and interact with fingerprint devices
based on the symbols, icons or pictograms. A more detailed description of the testing procedures and
results are presented in Annex A.
4.2 General symbol indicating fingerprint application
The following symbol should be used to indicate that a fingerprint application is in place.
1) Research conducted by the National Institute of Standards and Technology (NIST).
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Figure 1 — Fingerprint application [IEC 60417-6338]
On biometric systems, this symbol is used to indicate that the system is dedicated to fingerprint
applications.
There should also be an indication of the finger(s) to be used.
4.3 Finger/hand placement
The platen and fingers are visualized at equal value or identical line width to better convey pressing
and touching, and to prevent hovering. Fingernails are included to reinforce hand orientation and
prevent “hovering” over the platen. In the full procedure, these symbols, icons and pictograms should
be accompanied by a consistent profile image (see Figures 7, 8 and 9) to reinforce pressing and not
hovering.
Symbols, icons and pictograms visualizing other fingers than those shown above can be drawn
equivalently.
Figure 2 — Finger/hand placement, index finger of right hand [IEC 60417-6339-1]
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On biometric systems, this symbol is used to indicate that the system requests the index finger of the
right hand to be placed on the platen.
A mirrored graphical symbol may be used to indicate that the system requests the index finger of the
left hand to be placed on the platen.
NOTE 1 The meaning of this graphical symbol depends on its orientation.
Figure 3 — Finger/hand placement, four fingers of right hand [IEC 60417-6339-2]
On biometric systems, this symbol is used to indicate that the system requests the four fingers of the
right hand to be placed on the platen.
A mirrored graphical symbol may be used to indicate that the system requests the four fingers of the
left hand to be placed on the platen.
NOTE 2 The meaning of this graphical symbol depends on its orientation.
Figure 4 — Finger/hand placement, thumb of right hand [IEC 60417-6339-3]
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On biometric systems, this symbol is used to indicate that the system requests the thumb of the right
hand to be placed on the platen.
A mirrored graphical symbol may be used to indicate that the system requests the thumb of the left
hand to be placed on the platen.
NOTE 3 The meaning of this graphical symbol depends on its orientation.
Figure 5 — Finger/hand placement, thumbs of left and right hands [IEC 60417-6340-1]
On biometric systems, this symbol is used to indicate that the system requests the thumbs of the left
and right hands to be placed together on the platen.
Figure 6 — Finger/hand placement, index fingers of left and right hands [IEC 60417-6340-2]
On biometric systems, this symbol is used to indicate that the system requests the index fingers of the
left and right hands to be placed together on the platen.
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4.4 Finger/hand quality feedback
4.4.1 Press (more or less)
To reinforce pressing and not hovering, each main fingerprinting symbol should be accompanied by a
consistent “press” image. In the complete procedure, this has been visualized as a profile of a generalized
finger or thumb, either at a downward angle, or side angle (to reflect the general orientation of the
device). For a dynamic “Press more/less” indicator on the device itself, a simple + or – sign can suffice,
as the device can provide more context about what is “more” or “less” required.
Figure 7 — Press [IEC 60417-6341]
On biometric systems, this symbol is used to indicate that the system requests the finger should be
placed on the platen.
Figure 8 — Increase pressure [IEC 60417-6342-1]
On biometric systems, this symbol is used to indicate that the system requests the finger/hand should
be placed on the platen with increased pressure.
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Figure 9 — Decrease pressure [IEC 60417-6342-2]
On biometric systems, this symbol is used to indicate that the system requests the finger/hand should
be placed on the platen with decreased pressure.
4.4.2 Raise/lower angle
The following symbols should be used in order to indicate that the subject needs to raise or to lower the
angle of the finger(s).
Figure 10 — Raise angle [IEC 60417-6344-1]
On biometric systems, this symbol is used to indicate that the subject needs to raise the angle of the
finger(s).
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Figure 11 — Lower angle [IEC 60417-6344-2]
On biometric systems, this symbol is used to indicate that the subject needs to lower the angle of the
finger(s).
5 Finger/hand positioning
5.1 General
The following figures in Clause 5 provide real-time guidance to the biometric subjects on how to adjust
and correct their hand positioning from an undesirable position. This visual guidance is only to be used
in an interactive environment, i.e. the fingerprint scanning system is capable of detecting the erroneous
conditions of a subject’s hand positioning and providing immediate feedback in a visual form. This
visual guidance is not suitable for cases where information is only communicative and not operational,
such as posters, hand-outs or procedural instructions. Thus, it is logical to interactively display this
visual guidance, called for by erroneous situations, on an electronic monitor that can show the current
system status of the scanning process and the corresponding visual guidance.
This visual guidance is only applicable under the following conditions:
— a fingerprint scanning process is in progress;
— the system is capable of detecting whether or not the subject’s hand positioning is within acceptable
criteria and capable of providing real-time and interactive feedback on the scanning status.
Indicators other than this visual guidance may be used to provide feedback to the subject (e.g. for
completion of an action).
In Clause 5, the dotted figures of four fingers or thumb are examples of indicators given by biometric
products. In real uses, the shape of the figure should be similar, but might be changed.
The small darker corner images are intended as distinctive, bullet-like reminders that would sit in
contrast to any potential visual guidance that might appear in the platen display. The small icons serve
as reminders (to the biometric subjects) of the desired print image being captured. Icons are small in
nature and need to be simplistic to communicate its intended meaning without cluttering the display
where other information (e.g. the fingerprint image, the positioning guidance, etc.) is present and is
competing for users’ attention. The symbols designated for finger placement in 4.3 can be adapted and
used as small icons. However, symbols used as icons do have a potential for confusion as the intention
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of their use is different. A symbol is asking for action of the subject, whereas a small icon is giving
information and an indication of context.
5.2 Overlay visual guidance for finger/hand orientation
The overlay visual guidance provides a general guidance for the biometric subjects on where to place
their hands and thumbs on the system’s scanning platen. The following figures (Figures 12 to 15) show
examples of how the overlays with associated icons are presented in proportion to a scanning platen.
If the display of a preview with overlay is not supported by the used sensor, a similar animation shall
be used to provide similar dynamic user guidance. The small darker corner images shall be present as
defined for the preview with overlay.
Figure 12 — Overlay (right four fingers)
Figure 13 — Overlay (left four fingers)
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Figure 14 — Overlay (right thumb)
Figure 15 — Overlay (left thumb)
During the scanning process, the biometric subject would follow each overlay visual guidance and place
his/her hand on the platen accordingly, and the system should display a live video (e.g. on a monitor) of
the subject’s fingerprint and any necessary corrective visual guidance depending on the subject’s hand
positioning, before capturing the fingerprint. Figure 16 shows an example of a live video capture with a
subject’s right four fingers.
NOTE The fingerprint was intentionally blurred to protect the privacy of the test subject.
In this example, a corrective visual guidance of “Move left” will be needed.
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Figure 16 — Example of a right four fingers requiring “Move left” adjustment
5.3 Necessary finger/hand movement
5.3.1 Lateral movements
5.3.1.1 General
When the fingerprint scanning system detects that the subjects’ hands/thumbs are either off to the
right or left, the system will display corrective visual guidance to guide subjects on adjusting their
hand positioning laterally. It should be noted that the visual guidance cannot tell the subjects how much
lateral movement is needed. However, through interactive position detections and feedback from the
system, the subjects will be able to assume desirable hand positions after few corrective movements.
5.3.1.2 Move right
The following figures (Figures 17 to 20) show corrective visual guidance to guide subjects to move
their hands/thumbs to the right. There are three components in each visual representation: (1) the
overlay; (2) a small icon indicating which hand (e.g. right or left hand) and print (e.g. four fingers or
thumb) are being scanned, with a small arrow showing the desirable moving direction; and (3) a big
arrow also indicating the desirable moving direction. It is recommended that the third component, i.e.
the big arrow, be implemented with some animation (e.g. slight horizontal movement from left to right)
to reinforce the desirable corrective direction.
Figure 17 — Move right (right four fingers)
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Figure 18 — Move right (left four fingers)
Figure 19 — Move right (right thumb)
Figure 20 — Move right (left thumb)
5.3.1.3 Move left
The following figures (Figures 21 to 24) show corrective visual guidance to guide subjects to move
their hands/thumbs to the left. There are three components in each visual representation: (1) the
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overlay; (2) a small icon indicating which hand (e.g. right or left hand) and print (e.g. four fingers or
thumb) are being scanned, with a small arrow showing the desirable moving direction; and (3) a big
arrow also indicating the desirable moving direction. It is recommended that the third component, i.e.
the big arrow, be implemented with some animation (e.g. slight horizontal movement from right to left)
to reinforce the desirable corrective direction.
Figure 21 — Move left (right four fingers)
Figure 22 — Move left (left four fingers)
Figure 23 — Move left (right thumb)
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Figure 24 — Move left (left thumb)
5.3.2 Forward/backward movements
5.3.2.1 General
When the fingerprint scanning system detects that the subjects’ hands/thumbs are either too close to
the top or to the bottom of the scanning platen, the system will display these corrective visual guidance
to guide subjects on adjusting their hand position. It should be noted that the visual guidance could not
tell the subjects how much movement of forward or backward is needed. However, through interactive
position detections and feedback from the system, the subjects will be able to assume desirable hand
positions after few corrective movements.
EXAMPLE It is more understandable for the users to show visual instructions with animation. An example
of stepwise illustrations of the animation of Figure 30 is given in Annex C.
5.3.2.2 Move forward
The following figures (Figures 25 to 28) show corrective visual guidance to guide subjects to move
forward their hands/thumbs. There are three components in each visual representation: (1) the
overlay; (2) a small icon indicating which hand (e.g. right or left hand) and print (e.g. four fingers or
thumb) are being scanned, with a small arrow showing the desirable moving direction; (3) a big arrow
also indicating the desirable moving direction. It is recommended that the third component, i.e. the big
arrow, be implemented with some animation (e.g. slight forward movement) to reinforce the desirable
corrective direction.
Figure 25 — Move forward (right four fingers)
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Figure 26 — Move forward (left four fingers)
Figure 27 — Move forward (right thumb)
Figure 28 — Move forward (left thumb)
5.3.2.3 Move backward
The following figures (Figures 29 to 32) show corrective visual guidance to guide subjects to move
their hands/thumbs backward. There are three components in each visual representation: (1) the
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overlay; (2) a small icon indicating which hand (e.g. right or left hand) and print (e.g. four fingers or
thumb) are being scanned, with a small arrow showing the desirable moving direction; (3) a big arrow
also indicating the desirable moving direction. It is recommended that the third component, i.e. the big
arrow, be implemented with some animation (e.g. slight backward movement) to reinforce the desirable
corrective direction.
Figure 29 — Move backward (right four fingers)
Figure 30 — Move backward (left four fingers)
Figure 31 — Move backward (right thumb)
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Figure 32 — Move backward (left thumb)
5.4 Rotation
5.4.1 General
When the fingerpri
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