Patent Publication Number: US-2023139857-A1

Title: Coded vision system

Description:
RELATED APPLICATIONS 
     This application is a continuation of and claims the priority benefit of U.S. patent application Ser. No. 16/740,386, filed Jan. 10, 2020, which is a continuation of and claims the priority benefit of U.S. patent application Ser. No. 16/277,684, filed Feb. 15, 2019, which is a continuation of and claims the priority benefit of U.S. patent application Ser. No. 15/667,345, filed Aug. 2, 2017, which claims the priority benefit of U.S. Provisional Application Ser. No. 62/446,753, filed Jan. 16, 2017, each of which are hereby incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     Embodiments of the present disclosure relate generally to virtual display and, more particularly, but not by way of limitation, to computer vision using coded user data. 
     BACKGROUND 
     Client devices, such as smartphones, have image sensors that enable users to view their environments through displays of the client devices. However, users cannot currently use their social media content to interact with each other through the displays. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To easily identify the discussion of any particular element or act, the most significant digit or digits in a reference number refer to the figure (“FIG.”) number in which that element or act is first introduced. 
         FIG.  1    is a block diagram showing an example messaging system for exchanging data (e.g., messages and associated content) over a network. 
         FIG.  2    is block diagram illustrating further details regarding a messaging system having an integrated virtual object machine learning system, according to example embodiments. 
         FIG.  3    is a schematic diagram illustrating data which may be stored in a database of a messaging server system, according to certain example embodiments. 
         FIG.  4    is a schematic diagram illustrating a structure of a message, according to some embodiments, generated by a messaging client application for communication. 
         FIG.  5    is a schematic diagram illustrating an example access-limiting process, in terms of which access to content (e.g., an ephemeral message and associated multimedia payload of data) or a content collection (e.g., an ephemeral message story) may be time-limited (e.g., made ephemeral). 
         FIG.  6    shows internal functional components of a coded vision system, according to some example embodiments. 
         FIG.  7    shows a flow diagram for a method of implementing computer vision using coded user data, according to some example embodiments. 
         FIGS.  8 A and  8 B  show example user interfaces of computer vision using coded user data, according to some example embodiments. 
         FIG.  9    shows a flow diagram for a method for implementing augmented reality using user data and a coded image feature, according to some example embodiments. 
         FIGS.  10 A-C  show an example client device implementing augmented reality using user data and coded image features, according to some example embodiments. 
         FIG.  11    shows a method for implementing augmented reality using user data and coded image features, according to some example embodiments. 
         FIG.  12    is a block diagram illustrating a representative software architecture, which may be used in conjunction with various hardware architectures herein described. 
         FIG.  13    is a block diagram illustrating components of a machine, according to some example embodiments, able to read instructions from a machine-readable medium (e.g., a machine-readable storage medium) and perform any one or more of the methodologies discussed herein. 
     
    
    
     DETAILED DESCRIPTION 
     The description that follows includes systems, methods, techniques, instruction sequences, and computing machine program products that embody illustrative embodiments of the disclosure. In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide an understanding of various embodiments of the inventive subject matter. It will be evident, however, to those skilled in the art, that embodiments of the inventive subject matter may be practiced without these specific details. In general, well-known instruction instances, protocols, structures, and techniques are not necessarily shown in detail. According to some example embodiments, a first user can display an object using an image sensor of a client device (e.g., smartphone). The object is recognized as a scannable code linked to a second user&#39;s social media account or avatar user account (e.g., Bitmoji® account). A first avatar for the first user is then arranged to appear interacting with a second avatar of the second user. The arrangement of the two interacting avatars may be preconfigured based on characteristics of the first avatar, the second avatar, or their relationship on a social media platform. In some example embodiments, when the object is recognized as linked to a given user&#39;s account, social media content (e.g., user images) is integrated into a image display as augmented reality elements. For example, a user can scan a code of another user, and the live video feed displayed on the user&#39;s phone can appear to have bubbles emanating from the code in the live video feed. The avatars or other augmented reality elements can be positionally anchored to the code in the live video feed. Further actions may be triggered by scanning the code, such as prompting a popup menu to add the user that corresponds to the scanned code or install an app linked on the server side to a company associated with the scanned code. 
       FIG.  1    is a block diagram showing an example messaging system  100  for exchanging data (e.g., messages and associated content) over a network. The messaging system  100  includes multiple client devices  102 , each of which hosts a number of applications including a messaging client application  104 . Each messaging client application  104  is communicatively coupled to other instances of the messaging client application  104  and a messaging server system  108  via a network  106  (e.g., the Internet). 
     Accordingly, each messaging client application  104  is able to communicate and exchange data with another messaging client application  104  and with the messaging server system  108  via the network  106 . The data exchanged between messaging client applications  104 , and between a messaging client application  104  and the messaging server system  108 , includes functions (e.g., commands to invoke functions) as well as payload data (e.g., text, audio, video, or other multimedia data). 
     The messaging server system  108  provides server-side functionality via the network  106  to a particular messaging client application  104 . While certain functions of the messaging system  100  are described herein as being performed by either a messaging client application  104  or by the messaging server system  108 , it will be appreciated that the location of certain functionality within either the messaging client application  104  or the messaging server system  108  is a design choice. For example, it may be technically preferable to initially deploy certain technology and functionality within the messaging server system  108 , but to later migrate this technology and functionality to the messaging client application  104  where a client device  102  has a sufficient processing capacity. 
     The messaging server system  108  supports various services and operations that are provided to the messaging client application  104 . Such operations include transmitting data to, receiving data from, and processing data generated by the messaging client application  104 . This data may include message content, client device information, geolocation information, media annotation and overlays, message content persistence conditions, social network information, and live event information, as examples. Data exchanges within the messaging system  100  are invoked and controlled through functions available via user interfaces (UIs) of the messaging client application  104 . 
     Turning now specifically to the messaging server system  108 , an Application Programming Interface (API) server  110  is coupled to, and provides a programmatic interface to, an application server  112 . The application server  112  is communicatively coupled to a database server  118 , which facilitates access to a database  120  in which is stored data associated with messages processed by the application server  112 . 
     The API server  110  receives and transmits message data (e.g., commands and message payloads) between the client devices  102  and the application server  112 . Specifically, the API server  110  provides a set of interfaces (e.g., routines and protocols) that can be called or queried by the messaging client application  104  in order to invoke functionality of the application server  112 . The API server  110  exposes various functions supported by the application server  112 , including account registration; login functionality; the sending of messages, via the application server  112 , from a particular messaging client application  104  to another messaging client application  104 ; the sending of media files (e.g., images or video) from a messaging client application  104  to a messaging server application  114  for possible access by another messaging client application  104 ; the setting of a collection of media data (e.g., a story); the retrieval of such collections; the retrieval of a list of friends of a user of a client device  102 ; the retrieval of messages and content; the adding and deletion of friends to and from a social graph; the location of friends within the social graph; and opening application events (e.g., relating to the messaging client application  104 ). 
     The application server  112  hosts a number of applications and subsystems, including the messaging server application  114 , an image processing system  116 , and a social network system  122 . The messaging server application  114  implements a number of message-processing technologies and functions, particularly related to the aggregation and other processing of content (e.g., textual and multimedia content) included in messages received from multiple instances of the messaging client application  104 . As will be described in further detail, the text and media content from multiple sources may be aggregated into collections of content (e.g., called stories or galleries). These collections are then made available, by the messaging server application  114 , to the messaging client application  104 . Other processor- and memory-intensive processing of data may also be performed server-side by the messaging server application  114 , in view of the hardware requirements for such processing. 
     The application server  112  also includes the image processing system  116 , which is dedicated to performing various image processing operations, typically with respect to images or video received within the payload of a message at the messaging server application  114 . 
     The social network system  122  supports various social networking functions and services and makes these functions and services available to the messaging server application  114 . To this end, the social network system  122  maintains and accesses an entity graph (e.g., entity graph  304  in  FIG.  3   ) within the database  120 . Examples of functions and services supported by the social network system  122  include the identification of other users of the messaging system  100  with whom a particular user has relationships or whom the particular user is “following,” and also the identification of other entities and interests of a particular user. 
     The application server  112  is communicatively coupled to a database server  118 , which facilitates access to a database  120  in which is stored data associated with messages processed by the messaging server application  114 . 
       FIG.  2    is block diagram illustrating further details regarding the messaging system  100 , according to example embodiments. Specifically, the messaging system  100  is shown to comprise the messaging client application  104  and the application server  112 , which in turn embody a number of subsystems, namely an ephemeral timer system  202 , a collection management system  204 , an annotation system  206 , and a coded vision system  250 . 
     The ephemeral timer system  202  is responsible for enforcing the temporary access to content permitted by the messaging client application  104  and the messaging server application  114 . To this end, the ephemeral timer system  202  incorporates a number of timers that, based on duration and display parameters associated with a message or collection of messages (e.g., a SNAPCHAT Story), selectively display and enable access to messages and associated content via the messaging client application  104 . Further details regarding the operation of the ephemeral timer system  202  are provided below. 
     The collection management system  204  is responsible for managing collections of media (e.g., collections of text, image, video, and audio data). In some examples, a collection of content (e.g., messages, including images, video, text, and audio) may be organized into an “event gallery” or an “event story.” Such a collection may be made available for a specified time period, such as the duration of an event to which the content relates. For example, content relating to a music concert may be made available as a “story” for the duration of that music concert. The collection management system  204  may also be responsible for publishing an icon that provides notification of the existence of a particular collection to the user interface of the messaging client application  104 . 
     The collection management system  204  furthermore includes a curation interface  208  that allows a collection manager to manage and curate a particular collection of content. For example, the curation interface  208  enables an event organizer to curate a collection of content relating to a specific event (e.g., delete inappropriate content or redundant messages). Additionally, the collection management system  204  employs machine vision (or image recognition technology) and content rules to automatically curate a content collection. In certain embodiments, compensation may be paid to a user for inclusion of user-generated content into a collection. In such cases, the curation interface  208  operates to automatically make payments to such users for the use of their content. 
     The annotation system  206  provides various functions that enable a user to annotate or otherwise modify or edit media content associated with a message. For example, the annotation system  206  provides functions related to the generation and publishing of media overlays for messages processed by the messaging system  100 . The annotation system  206  operatively supplies a media overlay (e.g., a SNAPCHAT Geofilter or filter) to the messaging client application based on a geolocation of the client device  102 . In another example, the annotation system  206  operatively supplies a media overlay to the messaging client application  104  based on other information, such as social network information of the user of the client device  102 . A media overlay may include audio and visual content and visual effects. Examples of audio and visual content include pictures, texts, logos, animations, and sound effects. An example of a visual effect includes color overlaying. The audio and visual content or the visual effects can be applied to a media content item (e.g., a photo) at the client device  102 . For example, the media overlay includes text that can be overlaid on top of a photograph generated by the client device  102 . In another example, the media overlay includes an identification of a location (e.g., Venice Beach), a name of a live event, or a name of a merchant (e.g., Beach Coffee House). In another example, the annotation system  206  uses the geolocation of the client device  102  to identify a media overlay that includes the name of a merchant at the geolocation of the client device  102 . The media overlay may include other indicia associated with the merchant. The media overlays may be stored in the database and accessed through the database server  118 . 
     In one example embodiment, the annotation system  206  provides a user-based publication platform that enables users to select a geolocation on a map and upload content associated with the selected geolocation. The user may also specify circumstances under which particular content should be offered to other users. The annotation system  206  generates a media overlay that includes the uploaded content and associates the uploaded content with the selected geolocation. 
     In another example embodiment, the annotation system  206  provides a merchant-based publication platform that enables merchants to select a particular media overlay associated with a geolocation via a bidding process. For example, the annotation system associates the media overlay of a highest-bidding merchant with a corresponding geolocation for a predefined amount of time. 
     The coded vision system  250  manages tracking an object in different images, according to some example embodiments. Further details of the coded vision system  250  are discussed below with reference to  FIGS.  6 - 11   . Although the coded vision system  250  is illustrated in  FIG.  2    as being integrated into the messaging client application  104 , it is appreciated that in some example embodiments, the coded vision system  250  is integrated into other systems, such as the application server  112 . Further, in some example embodiments, some engines of the coded vision system  250  may be integrated into the application server  112  (e.g., to provide server side support to client generated requests) and some may be integrated into the client device  102  (e.g., to generate requests). 
       FIG.  3    is a schematic diagram illustrating data  300  which may be stored in the database  120  of the messaging server system  108 , according to certain example embodiments. While the content of the database  120  is shown to comprise a number of tables, it will be appreciated that the data could be stored in other types of data structures (e.g., as an object-oriented database). 
     The database  120  includes message data stored within a message table  314 . An entity table  302  stores entity data, including an entity graph  304 . Entities for which records are maintained within the entity table  302  may include individuals, corporate entities, organizations, objects, places, events, and so forth. Regardless of type, any entity regarding which the messaging server system  108  stores data may be a recognized entity. Each entity is provided with a unique identifier, as well as an entity type identifier (not shown). 
     The entity graph  304  furthermore stores information regarding relationships and associations between or among entities. Such relationships may be social, professional (e.g., work at a common corporation or organization), interested-based, or activity-based, merely for example. 
     The database  120  also stores annotation data, in the example form of filters, in an annotation table  312 . Filters for which data is stored within the annotation table  312  are associated with and applied to videos (for which data is stored in a video table  310 ) and/or images (for which data is stored in an image table  308 ). Filters, in one example, are overlays that are displayed as overlaid on an image or video during presentation to a recipient user. Filters may be of various types, including user-selected filters from a gallery of filters presented to a sending user by the messaging client application  104  when the sending user is composing a message. Other types of filters include geolocation filters (also known as geo-filters) which may be presented to a sending user based on geographic location. For example, geolocation filters specific to a neighborhood or special location may be presented within a user interface by the messaging client application  104 , based on geolocation information determined by a Global Positioning System (GPS) unit of the client device  102 . Another type of filter is a data filter, which may be selectively presented to a sending user by the messaging client application  104 , based on other inputs or information gathered by the client device during the message creation process. Examples of data filters include a current temperature at a specific location, a current speed at which a sending user is traveling, a battery life for a client device  102 , or the current time. 
     Other annotation data that may be stored within the image table  308  is so-called “lens” data. A “lens” may be a real-time special effect and sound that may be added to an image or a video. In some example embodiments, the lens is stored as lens metadata which is retrievable as content  1135 , discussed in further detail below. 
     As mentioned above, the video table  310  stores video data which, in one embodiment, is associated with messages for which records are maintained within the message table  314 . Similarly, the image table  308  stores image data associated with messages for which message data is stored in the message table  314 . The entity table  302  may associate various annotations from the annotation table  312  with various images and videos stored in the image table  308  and the video table  310 . 
     A story table  306  stores data regarding collections of messages and associated image, video, or audio data, which are compiled into a collection (e.g., a SNAPCHAT Story or a gallery). The creation of a particular collection may be initiated by a particular user (e.g., each user for whom a record is maintained in the entity table  302 ). A user may create a “personal story” in the form of a collection of content that has been created and sent/broadcast by that user. To this end, the user interface of the messaging client application  104  may include an icon that is user-selectable to enable a sending user to add specific content to his or her personal story. 
     A collection may also constitute a “live story,” which is a collection of content from multiple users that is created manually, automatically, or using a combination of manual and automatic techniques. For example, a “live story” may constitute a curated stream of user-submitted content from various locations and events. Users whose client devices have location services enabled and are at a common location or event at a particular time may, for example, be presented with an option, via a user interface of the messaging client application  104 , to contribute content to a particular live story. The live story may be identified to the user by the messaging client application  104 , based on his or her location. The end result is a “live story” told from a community perspective. 
     A further type of content collection is known as a “location story,” which enables a user whose client device  102  is located within a specific geographic location (e.g., on a college or university campus) to contribute to a particular collection. In some embodiments, a contribution to a location story may require a second degree of authentication to verify that the end user belongs to a specific organization or other entity (e.g., is a student on the university campus). 
       FIG.  4    is a schematic diagram illustrating a structure of a message  400 , according to some embodiments, generated by a messaging client application  104  for communication to a further messaging client application  104  or the messaging server application  114 . The content of a particular message  400  is used to populate the message table  314  stored within the database  120 , accessible by the messaging server application  114 . Similarly, the content of a message is stored in memory as “in-transit” or “in-flight” data of the client device  102  or the application server  112 . The message  400  is shown to include the following components:
         A message identifier  402 : a unique identifier that identifies the message  400 .   A message text payload  404 : text to be generated by a user via a user interface of the client device  102  and that is included in the message  400 .   A message image payload  406 : image data captured by a camera component of a client device  102  or retrieved from memory of a client device  102  and included in the message  400 .   A message video payload  408 : video data captured by a camera component or retrieved from a memory component of the client device  102  and included in the message  400 .   A message audio payload  410 : audio data captured by a microphone or retrieved from the memory component of the client device  102  and included in the message  400 .   Message annotations  412 : annotation data (e.g., filters, stickers, or other enhancements) that represents annotations to be applied to the message image payload  406 , message video payload  408 , or message audio payload  410  of the message  400 .   A message duration parameter  414 : a parameter value indicating, in seconds, the amount of time for which content of the message  400  (e.g., the message image payload  406 , message video payload  408 , and message audio payload  410 ) is to be presented or made accessible to a user via the messaging client application  104 .   A message geolocation parameter  416 : geolocation data (e.g., latitudinal and longitudinal coordinates) associated with the content payload of the message  400 . Multiple message geolocation parameter  416  values may be included in the payload, with each of these parameter values being associated with respective content items included in the content (e.g., a specific image in the message image payload  406 , or a specific video in the message video payload  408 ).   A message story identifier  418 : identifier values identifying one or more content collections (e.g., “stories”) with which a particular content item in the message image payload  406  of the message  400  is associated. For example, multiple images within the message image payload  406  may each be associated with multiple content collections using identifier values.   A message tag  420 : one or more tags, each of which is indicative of the subject matter of content included in the message payload. For example, where a particular image included in the message image payload  406  depicts an animal (e.g., a lion), a tag value may be included within the message tag  420  that is indicative of the relevant animal. Tag values may be generated manually, based on user input, or may be automatically generated using, for example, image recognition.   A message sender identifier  422 : an identifier (e.g., a messaging system identifier, email address, or device identifier) indicative of a user of the client device  102  on which the message was generated and from which the message  400  was sent.   A message receiver identifier  424 : an identifier (e.g., a messaging system identifier, email address, or device identifier) indicative of a user of the client device  102  to which the message is addressed.       

     The contents (e.g., values) of the various components of the message  400  may be pointers to locations in tables within which content data values are stored. For example, an image value in the message image payload  406  may be a pointer to (or address of) a location within the image table  308 . Similarly, values within the message video payload  408  may point to data stored within the video table  310 , values stored within the message annotations  412  may point to data stored in the annotation table  312 , values stored within the message story identifier  418  may point to data stored in the story table  306 , and values stored within the message sender identifier  422  and the message receiver identifier  424  may point to user records stored within the entity table  302 . 
       FIG.  5    is a schematic diagram illustrating an access-limiting process  500 , in terms of which access to content (e.g., an ephemeral message  502 , and associated multimedia payload of data) or a content collection (e.g., an ephemeral message story  504 ), may be time-limited (e.g., made ephemeral). 
     An ephemeral message  502  is shown to be associated with a message duration parameter  506 , the value of which determines an amount of time that the ephemeral message  502  will be displayed to a receiving user of the ephemeral message  502  by the messaging client application  104 . In one embodiment, where the messaging client application  104  is a SNAPCHAT application client, an ephemeral message  502  is viewable by a receiving user for up to a maximum of seconds, depending on the amount of time that the sending user specifies using the message duration parameter  506 . 
     The message duration parameter  506  and the message receiver identifier  424  are shown to be inputs to a message timer  512 , which is responsible for determining the amount of time that the ephemeral message  502  is shown to a particular receiving user identified by the message receiver identifier  424 . In particular, the ephemeral message  502  will only be shown to the relevant receiving user for a time period determined by the value of the message duration parameter  506 . The message timer  512  is shown to provide output to a more generalized ephemeral timer system  202 , which is responsible for the overall timing of display of content (e.g., an ephemeral message  502 ) to a receiving user. 
     The ephemeral message  502  is shown in  FIG.  5    to be included within an ephemeral message story  504  (e.g., a personal SNAPCHAT Story, or an event story). The ephemeral message story  504  has an associated story duration parameter  508 , a value of which determines a time duration for which the ephemeral message story  504  is presented and accessible to users of the messaging system  100 . The story duration parameter  508 , for example, may be the duration of a music concert, where the ephemeral message story  504  is a collection of content pertaining to that concert. Alternatively, a user (either the owning user or a curator user) may specify the value for the story duration parameter  508  when performing the setup and creation of the ephemeral message story  504 . 
     Additionally, each ephemeral message  502  within the ephemeral message story  504  has an associated story participation parameter  510 , a value of which determines the duration of time for which the ephemeral message  502  will be accessible within the context of the ephemeral message story  504 . Accordingly, a particular ephemeral message  502  may “expire” and become inaccessible within the context of the ephemeral message story  504 , prior to the ephemeral message story  504  itself expiring in terms of the story duration parameter  508 . The story duration parameter  508 , story participation parameter  510 , and message receiver identifier  424  each provide input to a story timer  514 , which operationally determines whether a particular ephemeral message  502  of the ephemeral message story  504  will be displayed to a particular receiving user and, if so, for how long. Note that the ephemeral message story  504  is also aware of the identity of the particular receiving user as a result of the message receiver identifier  424 . 
     Accordingly, the story timer  514  operationally controls the overall lifespan of an associated ephemeral message story  504 , as well as an individual ephemeral message  502  included in the ephemeral message story  504 . In one embodiment, each and every ephemeral message  502  within the ephemeral message story  504  remains viewable and accessible for a time period specified by the story duration parameter  508 . In a further embodiment, a certain ephemeral message  502  may expire, within the context of the ephemeral message story  504 , based on a story participation parameter  510 . Note that a message duration parameter  506  may still determine the duration of time for which a particular ephemeral message  502  is displayed to a receiving user, even within the context of the ephemeral message story  504 . Accordingly, the message duration parameter  506  determines the duration of time that a particular ephemeral message  502  is displayed to a receiving user, regardless of whether the receiving user is viewing that ephemeral message  502  inside or outside the context of an ephemeral message story  504 . 
     The ephemeral timer system  202  may furthermore operationally remove a particular ephemeral message  502  from the ephemeral message story  504  based on a determination that it has exceeded an associated story participation parameter  510 . For example, when a sending user has established a story participation parameter  510  of 24 hours from posting, the ephemeral timer system will remove the relevant ephemeral message  502  from the ephemeral message story  504  after the specified 24 hours. The ephemeral timer system  202  also operates to remove an ephemeral message story  504  either when the story participation parameter  510  for each and every ephemeral message  502  within the ephemeral message story  504  has expired, or when the ephemeral message story itself has expired in terms of the story duration parameter  508 . 
     In certain use cases, a creator of a particular ephemeral message story  504  may specify an indefinite story duration parameter  508 . In this case, the expiration of the story participation parameter for the last remaining ephemeral message  502  within the ephemeral message story  504  will determine when the ephemeral message story  504  itself expires. In this case, a new ephemeral message  502 , added to the ephemeral message story  504 , with a new story participation parameter  510 , effectively extends the life of an ephemeral message story  504  to equal the value of the story participation parameter  510 . 
     In response to the ephemeral timer system  202  determining that an ephemeral message story  504  has expired (e.g., is no longer accessible), the ephemeral timer system  202  communicates with the messaging system  100  (e.g., specifically, the messaging client application  104 ) to cause an indicium (e.g., an icon) associated with the relevant ephemeral message story  504  to no longer be displayed within a user interface of the messaging client application  104 . Similarly, when the ephemeral timer system  202  determines that the message duration parameter  506  for a particular ephemeral message has expired, the ephemeral timer system  202  causes the messaging client application  104  to no longer display an indicium (e.g., an icon or textual identification) associated with the ephemeral message  502 . 
       FIG.  6    shows internal functional components of a coded vision system  250 , according to some example embodiments. The components themselves are communicatively coupled (e.g., via appropriate interfaces) to each other and to various data sources, so as to allow information to be passed between the applications or so as to allow the applications to share and access common data. Furthermore, the components access the database  120  via the database server  118 . As illustrated, the coded vision system  250  comprises a user interface engine  610 , a detection engine  620 , a network interface engine  630 , an action engine  640 , and the tracking engine  650 . The user interface engine  610  manages generating user interface elements for display on the client device. Further, the user interface engine  610  manages receiving user interface actions through an input/output (I/O) device of the client device, such as a touch screen. The detection engine  620  manages scanning the live feed images and detecting different shapes or codes depicted in the live feed. The network interface engine  630  is configured to send requests for content to a server, such as coded vision system  250 , according to some example embodiments. The action engine  640  is configured to generate augmented reality elements using user data from an account that is identified using the image feature. In some example embodiments, the action engine  640  is located on a server (e.g., in coded vision system  250 ), as discussed with reference to  FIG.  11    below. The tracking engine  650  manages tracking the image feature in the live feed and anchoring the augmented reality elements with respect to the image feature. 
       FIG.  7    shows a flow diagram for a method  700  of implementing augmented reality using coded user data, according to some example embodiments. At operation  705 , the detection engine identifies an image feature in a live feed. At operation  710 , the network interface engine  630  accesses user data associated with the detected image feature. At operation  715 , action engine  640  generates overlay content with the user data. In some embodiments, at operation  715 , the action engine  640  receives the overlay content from a server configured to generate the overlay content, as discussed in further detail below. At operation  720 , the action engine  640  anchors the overlay content to the image feature in the live feed. 
       FIGS.  8 A and  8 B  show an example of a client device performing the method  700  of  FIG.  7   , according to some example embodiments. In particular,  FIG.  8 A  shows a client device  800  displaying a user interface  805  for implementing augmented reality using coded user data. The user interface  805  is generated by the user interface engine  610  from a client application (e.g., coded vision system  250 ) executing on the client device  800 , according to some embodiments. As illustrated, the user interface  805  is displaying one or more frames (e.g., live video) from a camera on the backside (not depicted) of client device  800 . In the one or more frames, an image feature  810  is depicted. In some example embodiments, the image feature is coded with dots, lines, or other types of coding that the detection engine can use to identify a user associated with the image feature  810 . Further details of an example approaches using image features are described in: application Ser. No. 15/262,942, titled “PRESENTING AN AUGMENTED REALITY WITHIN A CUSTOM GRAPHIC,” Attorney Docket No. 4218.373US1, filed on Sep. 12, 2016; U.S. Pat. No. 9,111,164, titled “CUSTOM FUNCTIONAL PATTERNS FOR OPTICAL BARCODES,” Attorney Docket No. 4218.013US1, filed on Jan. 19, 2015; application Ser. No. 14/595,712, titled “GUIDED PERSONAL IDENTITY BASED ACTIONS,” Attorney Docket No. 4218.010US1, filed on Jan. 13, 2015; and application Ser. No. 15/074,629, titled “FACIAL PATTERNS FOR OPTICAL BARCODES,” Attorney Docket No. 4218.331US1, filed on Jan. 19, 2015; which are hereby incorporated by reference in entirety. 
       FIG.  8 B  shows the client device  800  with the user interface displaying augmented reality elements, according to some example embodiments. After the image feature is scanned and the coding is used to identify a corresponding user and user profile on the application server  112 , the coded vision system  250  uses user data stored in the user profile (e.g., stored in database  120 ) to generate overlay content for the live feed. In the example shown, image post data (e.g., images from ephemeral messages  502  published by the user over social media) are used to populate one or more bubbles  815 . The one or more bubbles  815  are part of an animation sequence that depicts the bubbles as emanating from the image feature  810 , according to some example embodiments. 
     Further, upon the image feature being scanned and the user profile being identified, a add button  820  can be shown with the overlay content. The add button  820  allows the user operating client device  800  (not depicted) to add the user whose image feature was scanned as a friend on the social graph. After the users are friends, they may then exchange ephemeral messages  502  using their respective message client applications (e.g., message client app  504 ). 
       FIG.  9    shows a flow diagram for a method  900  for implementing augmented reality using user data and a coded image feature, according to some example embodiments. At operation  905 , the detection engine  620  identifies an image feature in a live feed. At operation  907 , the detection engine  620  determines that the image feature is associated with a user profile of a first user. At operation  910 , the network interface engine  630  accesses the first user&#39;s user data on a server, e.g., application server  112 . At operation  915 , the network interface engine  630  accesses a second user&#39;s user data on the server. The second user is the user that is operating the coded vision system through another the client device. At operation  920 , the action engine  640  generates a combined depiction that shows the user data of the first user interacting with user data of the second user. At operation  925 , the action engine  640  overlays the combined depiction over the live feed. At operation  930 , the action engine  640  anchors the combined depiction to the image feature in the live feed. For example, the combined depiction is anchored to the image feature such that when the client device is moved to view the image feature from different angles, the combined depiction keeps its position with respect to the image feature in the live feed.  FIGS.  10 B and  10 C , discussed below, further show an example of anchoring a combined depiction as the client device (a smartphone) is rotated around the image feature. 
       FIGS.  10 A-C  show an example client device  1000  implementing augmented reality using user data and coded image features, according to some example embodiments. In particular, as illustrated in the example of  FIG.  10 A , the client device  1000  includes a user interface  1005  that is managed by the user interface engine  610 . As illustrated, the user interface  1005  is displaying a live feed of image data from an image sensor located on the backside (not depicted) of the client device  1000 . The live feed comprises one or more image frames played sequentially (e.g., a live video feed). In the live feed, an image feature  1010  is depicted. The image feature  1010  is an image that the detection feature is pre-configured to recognize. Further, according to some example embodiments, the image feature has one or more dots or bars that correspond to a code language (e.g., a barcode) that identifies a user account of a user. The detection engine  620  is configured to identify the image feature  1010  and use the code (e.g., dot configuration) to identify a user account of a user. In this way, the image feature  1010  functions as an account identifier for a user. 
       FIG.  10 B  shows an example of the client device  1000  displaying a combined depiction of user data from two different users, according to some example embodiments. As illustrated, in response to the image feature  1010  being scanned and the user account of a user being identified, a combined depiction  1015  (e.g., combined avatar) is generated that depicts first user data  1020  of a first user interacting with second user data  1025  of a second user. In some example embodiments, the first user data  1020  is an avatar created by the first user (e.g., user whose user profile is identified by the code in image feature  1010 ) and the second user data  1025  is another avatar created by the second user (e.g., user of the client device  1000 ). The combined depiction  1015  is generated using a combined avatar template that specifies how each avatar should be arranged or configured so that the avatars appear to be interacting with each other. 
       FIG.  10 C  shows an example of the client device  1000  displaying a combined depiction of user data from two different users from a different perspective, according to some example embodiments. To maintain the appearance that the image feature  1010  is the source of the augmented reality elements (e.g., one or more bubbles  815  in  FIG.  8 B  or the combined depiction  1015 ), tracking is implemented. In particular, for example, a tracking engine  650  is implemented to anchor the augmented reality elements to the image feature. In this way, with reference to  FIG.  8 B , the one or more bubbles  815  can be played as an animation that makes the image feature  810  appear as the source of the bubbles. Similarly, with reference to  FIG.  10 C , the combined depiction  1015  may be animated so the first avatar (e.g., user data  1020 ) and the cartoon present appear to pop out of the image feature  1010 . Further, as illustrated in  FIG.  10 C , as the user (not depicted) moves the client device  1000 , thereby causing the image feature  1010  to move in the live feed, the tracking engine  650  tracks the image feature location and anchors the augmented reality elements to the image feature location at a fixed position. Further, as the user rotates the client device  1000  around the image feature  1010 , the tracking engine  650  can rotate the combined depiction  1015  to face the user. Further, rotation of the client device  1000  may cause the depicted augmented elements (e.g., combined depiction) to rotate in three-dimensions, animate (e.g., cartoon confetti may be depicted as falling across the user interface  1005 ), and so forth. In some embodiments, the augmented elements are three-dimensional models that can animate or be modified (e.g., rotated about the image feature  1010 ) in response to manipulation (e.g., movement) of the client device  1000 . 
       FIG.  11    shows a method  1100  for implementing augmented reality using user data and coded image features, according to some example embodiments. In  FIG.  11   , operations performed on the application server are executed using an example of a coded vision system  250 , which in  FIG.  11    is labeled as a app engine  1111 . The operations external to the app engine  1111  are executed on the coded vision system  250  on client device  102 . At operation  1105 , the coded vision system  250  detects an image feature through its image sensor. In some example embodiments, the image feature is imaged in the live feed. To trigger the detection engine  620  to scan and identify the image feature, the user performs a user action (e.g., screen tap) on the code in the live feed, according to some example embodiments. At operation  1110 , the detection engine  620  runs a code checker that checks whether the code in the image feature is valid. In some example embodiments, all codes are generated using an equation or algorithm. In those embodiments, the detection engine  620  can use the equation or algorithm to check whether the code is valid. If the code is not valid, the user interface engine  610  generates an error message (e.g. “Scanned code not valid.”) for display on the display screen of the client device. 
     If the code is valid, at operation  1115 , the user interface engine  610  generates a “Loading” message for display on the client device. Further, the code from the image feature or the image feature image data is transmitted to the app engine  1111  for further processing. At operation  1120 , the app engine  1111  receives the code or the image feature image data and uses it to locate a user profile of a user. The image feature is thus an identifier for the user profile account. At operation  1125 , data is transmitted to the client device  102 . In some embodiments, the data includes an user account identifier (e.g., “snapcode identifier”), a uniform resource locator (URL) for a content package, and a bitmoji ID, where a Bitmoji® is a name for a type of reconfigurable avatar designed by the user. Bitmoji&#39;s are accessible as part of a network platform connectable to over a network as a service. The content package may include content such as lens metadata (e.g., video filter data), that can configure the live feed to display a video effect (e.g., blur, swirl, augmented reality clouds animated to appear raining). In some embodiments, the content  1135  is accessible to the user only if the user scans a given image feature. In those embodiments, some image features may be owned/managed by a company. The company may configure a video effect to show their logo, brand name, or promotional item. Upon scanning the image feature, the company&#39;s content package may be unlocked in that that the content package URL is sent to the user device. Further, according to some example embodiments, the content includes a combined depiction template identifier. 
     At operation  1130 , the coded vision system  250  requests the content  1135  by directing a request to the URL. In response, the app engine  1111  sends the content  1135  to the client device  102 , and the client device  102  prepares to render the content at operation  1140 . At operation  1145 , if the content does not require a combined depiction (e.g., a “friendmoji” that shows two avatars interacting with each other), the coded vision system  250  displays the content (e.g. applies a video effect to the live feed) at operation  1150 . On the other hand, if, at operation  1145 , the content does require a combined depiction, then at operation  1155 , the coded vision system  250  sends a request to a server target (e.g., an action engine  760  executed on app engine having an address “/bitmoji/image”), requesting the combined depiction content. In some embodiments, the request of operation includes an identifier identifying the first user account, the second user account, and the type of combined depiction content to be used. In some example embodiments, the contented displayed at operation  1150  includes one or more of: a combined avatar of the two users (e.g., a scanning user and a user whose scannable image was scanned), overlay content using images from ephemeral messages  502 , or an add button (e.g., add button  820 ,  FIG.  8 B ). 
     In some example embodiments, the client device stores a complete list of combined depiction templates and IDs, and an action engine  1160  on the app engine  1111  manages generating the combined depictions. Once the action engine  1160  generates the combined depiction  1165 , it sends the combined depiction  1165  to the client device  102 . The client device receives the combined depiction and anchors the combined depiction  1165  to the image feature in the live feed, as discussed above. In some example embodiments, if at operation  1145  the content requires a combined depiction, but the user associated with the image feature does not have an avatar (e.g., a Bitmoji®) configured, the action engine prepares fall back content. For example, instead of an avatar popping out of a present (as depicted in combined depiction  1165 ) the present can be animated as exploding with confetti. 
       FIG.  12    is a block diagram illustrating an example software architecture  1206 , which may be used in conjunction with various hardware architectures herein described.  FIG.  12    is a non-limiting example of a software architecture, and it will be appreciated that many other architectures may be implemented to facilitate the functionality described herein. The software architecture  1206  may execute on hardware such as a machine  1200  of  FIG.  12    that includes, among other things, processors, memory, and I/O components. A representative hardware layer  1252  is illustrated and can represent, for example, the machine  1200  of  FIG.  12   . The representative hardware layer  1252  includes a processing unit  1254  having associated executable instructions  1204 . The executable instructions represent the executable instructions of the software architecture  1206 , including implementation of the methods, components, and so forth described herein. The hardware layer  1252  also includes a memory/storage  1256 , which also has the executable instructions  1204 . The hardware layer  1252  may also comprise other hardware  1258 . 
     In the example architecture of  FIG.  12   , the software architecture  1206  may be conceptualized as a stack of layers where each layer provides particular functionality. For example, the software architecture  1206  may include layers such as an operating system  1202 , libraries  1220 , frameworks/middleware  1218 , applications  1216 , and a presentation layer  1214 . Operationally, the applications  1216  and/or other components within the layers may invoke API calls  1208  through the software stack and receive a response in the form of messages  1212 . The layers illustrated are representative in nature and not all software architectures have all layers. For example, some mobile or special-purpose operating systems may not provide a frameworks/middleware  1218 , while others may provide such a layer. Other software architectures may include additional or different layers. 
     The operating system  1202  may manage hardware resources and provide common services. The operating system  1202  may include, for example, a kernel  1222 , services  1224 , and drivers  1226 . The kernel  1222  may act as an abstraction layer between the hardware and the other software layers. For example, the kernel  1222  may be responsible for memory management, processor management (e.g., scheduling), component management, networking, security settings, and so on. The services  1224  may provide other common services for the other software layers. The drivers  1226  are responsible for controlling or interfacing with the underlying hardware. For instance, the drivers  1226  include display drivers, camera drivers, Bluetooth® drivers, flash memory drivers, serial communication drivers (e.g., Universal Serial Bus (USB) drivers), Wi-Fi® drivers, audio drivers, power management drivers, and so forth depending on the hardware configuration. 
     The libraries  1220  provide a common infrastructure that is used by the applications  1216  and/or other components and/or layers. The libraries  1220  provide functionality that allows other software components to perform tasks in an easier fashion than by interfacing directly with the underlying operating system  1202  functionality (e.g., kernel  1222 , services  1224 , and/or drivers  1226 ). The libraries  1220  may include system libraries  1244  (e.g., C standard library) that may provide functions such as memory allocation functions, string manipulation functions, mathematical functions, and the like. In addition, the libraries  1220  may include API libraries  1246  such as media libraries (e.g., libraries to support presentation and manipulation of various media formats such as MPEG4, H.264, MP3, AAC, AMR, JPG, or PNG), graphics libraries (e.g., an OpenGL framework that may be used to render two dimensional (2D) and three dimensional (3D) graphic content on a display), database libraries (e.g., SQLite that may provide various relational database functions), web libraries (e.g., WebKit that may provide web browsing functionality), and the like. The libraries  1220  may also include a wide variety of other libraries  1248  to provide many other APIs to the applications  1216  and other software components/modules. 
     The frameworks/middleware  1218  provide a higher-level common infrastructure that may be used by the applications  1216  and/or other software components/modules. For example, the frameworks/middleware  1218  may provide various graphic user interface (GUI) functions, high-level resource management, high-level location services, and so forth. The frameworks/middleware  1218  may provide a broad spectrum of other APIs that may be utilized by the applications  1216  and/or other software components/modules, some of which may be specific to a particular operating system  1202  or platform. 
     The applications  1216  include built-in applications  1238  and/or third-party applications  1240 . Examples of representative built-in applications  1238  may include, but are not limited to, a contacts application, a browser application, a book reader application, a location application, a media application, a messaging application, and/or a game application. The third-party applications  1240  may include an application developed using the ANDROID™ or IOS™ software development kit (SDK) by an entity other than the vendor of the particular platform, and may be mobile software running on a mobile operating system such as IOS™, ANDROID™, WINDOWS® Phone, or other mobile operating systems. The third-party applications  1240  may invoke the API calls  1208  provided by the mobile operating system (such as the operating system  1202 ) to facilitate functionality described herein. 
     The applications  1216  may use built-in operating system functions (e.g., kernel  1222 , services  1224 , and/or drivers  1226 ), libraries  1220 , and frameworks/middleware  1218  to create user interfaces to interact with users of the system. Alternatively, or additionally, in some systems, interactions with a user may occur through a presentation layer, such as the presentation layer  1214 . In these systems, the application/component “logic” can be separated from the aspects of the application/component that interact with a user. 
       FIG.  13    is a block diagram illustrating components of a machine  1300 , according to some example embodiments, able to read instructions from a machine-readable medium (e.g., a machine-readable storage medium) and perform any one or more of the methodologies discussed herein. Specifically,  FIG.  13    shows a diagrammatic representation of the machine  1300  in the example form of a computer system, within which instructions  1316  (e.g., software, a program, an application, an applet, an app, or other executable code) for causing the machine  1300  to perform any one or more of the methodologies discussed herein may be executed. As such, the instructions  1316  may be used to implement modules or components described herein. The instructions  1316  transform the general, non-programmed machine  1300  into a particular machine programmed to carry out the described and illustrated functions in the manner described. In alternative embodiments, the machine operates as a standalone device or may be coupled (e.g., networked) to other machines. In a networked deployment, the machine  1300  may operate in the capacity of a server machine or a client machine in a server-client network environment, or as a peer machine in a peer-to-peer (or distributed) network environment. The machine  1300  may comprise, but not be limited to, a server computer, a client computer, a personal computer (PC), a tablet computer, a laptop computer, a netbook, a set-top box (STB), a personal digital assistant (PDA), an entertainment media system, a cellular telephone, a smartphone, a mobile device, a wearable device (e.g., a smart watch), a smart home device (e.g., a smart appliance), other smart devices, a web appliance, a network router, a network switch, a network bridge, or any machine capable of executing the instructions  1316 , sequentially or otherwise, that specify actions to be taken by the machine  1300 . Further, while only a single machine  1300  is illustrated, the term “machine” shall also be taken to include a collection of machines that individually or jointly execute the instructions  1316  to perform any one or more of the methodologies discussed herein. 
     The machine  1300  may include processors  1310 , memory/storage  1330 , and I/O components  1350 , which may be configured to communicate with each other such as via a bus  1302 . The memory/storage  1330  may include a memory  1332 , such as a main memory, or other memory storage, and a storage unit  1336 , both accessible to the processors  1310  such as via the bus  1302 . The storage unit  1336  and memory  1332  store the instructions  1316  embodying any one or more of the methodologies or functions described herein. The instructions  1316  may also reside, completely or partially, within the memory  1332 , within the storage unit  1336 , within at least one of the processors  1310  (e.g., within the processor&#39;s cache memory), or any suitable combination thereof, during execution thereof by the machine  1300 . Accordingly, the memory  1332 , the storage unit  1336 , and the memory of the processors  1310  are examples of machine-readable media. 
     The I/O components  1350  may include a wide variety of components to receive input, provide output, produce output, transmit information, exchange information, capture measurements, and so on. The specific I/O components  1350  that are included in a particular machine  1300  will depend on the type of machine. For example, portable machines such as mobile phones will likely include a touch input device or other such input mechanisms, while a headless server machine will likely not include such a touch input device. It will be appreciated that the I/O components  1350  may include many other components that are not shown in  FIG.  13   . The I/O components  1350  are grouped according to functionality merely for simplifying the following discussion and the grouping is in no way limiting. In various example embodiments, the I/O components  1350  may include output components  1352  and input components  1354 . The output components  1352  may include visual components (e.g., a display such as a plasma display panel (PDP), a light-emitting diode (LED) display, a liquid-crystal display (LCD), a projector, or a cathode ray tube (CRT)), acoustic components (e.g., speakers), haptic components (e.g., a vibratory motor, resistance mechanisms), other signal generators, and so forth. The input components  1354  may include alphanumeric input components (e.g., a keyboard, a touch screen configured to receive alphanumeric input, a photo-optical keyboard, or other alphanumeric input components), point-based input components (e.g., a mouse, a touchpad, a trackball, a joystick, a motion sensor, or other pointing instruments), tactile input components (e.g., a physical button, a touch screen that provides location and/or force of touches or touch gestures, or other tactile input components), audio input components (e.g., a microphone), and the like. 
     In further example embodiments, the I/O components  1350  may include biometric components  1356 , motion components  1358 , environment components  1360 , or position components  1362  among a wide array of other components. For example, the biometric components  1356  may include components to detect expressions (e.g., hand expressions, facial expressions, vocal expressions, body gestures, or eye tracking), measure biosignals (e.g., blood pressure, heart rate, body temperature, perspiration, or brain waves), identify a person (e.g., voice identification, retinal identification, facial identification, fingerprint identification, or electroencephalogram-based identification), and the like. The motion components  1358  may include acceleration sensor components (e.g., accelerometer), gravitation sensor components, rotation sensor components (e.g., gyroscope), and so forth. The environment components  1360  may include, for example, illumination sensor components (e.g., photometer), temperature sensor components (e.g., one or more thermometers that detect ambient temperature), humidity sensor components, pressure sensor components (e.g., barometer), acoustic sensor components (e.g., one or more microphones that detect background noise), proximity sensor components (e.g., infrared sensors that detect nearby objects), gas sensors (e.g., gas sensors to detect concentrations of hazardous gases for safety or to measure pollutants in the atmosphere), or other components that may provide indications, measurements, or signals corresponding to a surrounding physical environment. The position components  1362  may include location sensor components (e.g., a GPS receiver component), altitude sensor components (e.g., altimeters or barometers that detect air pressure from which altitude may be derived), orientation sensor components (e.g., magnetometers), and the like. 
     Communication may be implemented using a wide variety of technologies. The I/O components  1350  may include communication components  1364  operable to couple the machine  1300  to a network or devices  1370  via a coupling  1382  and a coupling  1372 , respectively. For example, the communication components  1364  may include a network interface component or other suitable device to interface with the network  1380 . In further examples, the communication components  1364  may include wired communication components, wireless communication components, cellular communication components, Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components to provide communication via other modalities. The devices  1370  may be another machine or any of a wide variety of peripheral devices (e.g., a peripheral device coupled via a USB). 
     Moreover, the communication components  1364  may detect identifiers or include components operable to detect identifiers. For example, the communication components  1364  may include Radio Frequency Identification (RFID) tag reader components, NFC smart tag detection components, optical reader components (e.g., an optical sensor to detect one-dimensional barcodes such as Universal Product Code (UPC) barcode, multi-dimensional barcodes such as Quick Response (QR) code, Aztec code, Data Matrix, Dataglyph, MaxiCode, PDF413, Ultra Code, UCC RSS-2D barcode, and other optical codes), or acoustic detection components (e.g., microphones to identify tagged audio signals). In addition, a variety of information may be derived via the communication components  1364 , such as location via Internet Protocol (IP) geolocation, location via Wi-Fi® signal triangulation, location via detecting an NFC beacon signal that may indicate a particular location, and so forth. 
     Glossary 
     “CARRIER SIGNAL” in this context refers to any intangible medium that is capable of storing, encoding, or carrying instructions for execution by the machine, and includes digital or analog communications signals or other intangible media to facilitate communication of such instructions. Instructions may be transmitted or received over the network using a transmission medium via a network interface device and using any one of a number of well-known transfer protocols. 
     “CLIENT DEVICE” in this context refers to any machine that interfaces to a communications network to obtain resources from one or more server systems or other client devices. A client device may be, but is not limited to, a mobile phone, desktop computer, laptop, PDA, smartphone, tablet, ultrabook, netbook, multi-processor system, microprocessor-based or programmable consumer electronics system, game console, set-top box, or any other communication device that a user may use to access a network. 
     “COMMUNICATIONS NETWORK” in this context refers to one or more portions of a network that may be an ad hoc network, an intranet, an extranet, a virtual private network (VPN), a local area network (LAN), a wireless LAN (WLAN), a wide area network (WAN), a wireless WAN (WWAN), a metropolitan area network (MAN), the Internet, a portion of the Internet, a portion of the Public Switched Telephone Network (PSTN), a plain old telephone service (POTS) network, a cellular telephone network, a wireless network, a Wi-Fi® network, another type of network, or a combination of two or more such networks. For example, a network or a portion of a network may include a wireless or cellular network and the coupling may be a Code Division Multiple Access (CDMA) connection, a Global System for Mobile communications (GSM) connection, or another type of cellular or wireless coupling. In this example, the coupling may implement any of a variety of types of data transfer technology, such as Single Carrier Radio Transmission Technology (1×RTT), Evolution-Data Optimized (EVDO) technology, General Packet Radio Service (GPRS) technology, Enhanced Data rates for GSM Evolution (EDGE) technology, third Generation Partnership Project (3GPP) including 3G, fourth generation wireless (4G) networks, Universal Mobile Telecommunications System (UMTS), High-Speed Packet Access (HSPA), Worldwide Interoperability for Microwave Access (WiMAX), Long-Term Evolution (LTE) standard, others defined by various standard-setting organizations, other long-range protocols, or other data transfer technology. 
     “EMPHEMERAL MESSAGE” in this context refers to a message that is accessible for a time-limited duration. An ephemeral message may be a text, an image, a video, and the like. The access time for the ephemeral message may be set by the message sender. Alternatively, the access time may be a default setting or a setting specified by the recipient. Regardless of the setting technique, the message is transitory. 
     “MACHINE-READABLE MEDIUM” in this context refers to a component, a device, or other tangible media able to store instructions and data temporarily or permanently and may include, but is not limited to, random-access memory (RAM), read-only memory (ROM), buffer memory, flash memory, optical media, magnetic media, cache memory, other types of storage (e.g., Erasable Programmable Read-Only Memory (EPROM)), and/or any suitable combination thereof. The term “machine-readable medium” should be taken to include a single medium or multiple media (e.g., a centralized or distributed database, or associated caches and servers) able to store instructions. The term “machine-readable medium” shall also be taken to include any medium, or combination of multiple media, that is capable of storing instructions (e.g., code) for execution by a machine, such that the instructions, when executed by one or more processors of the machine, cause the machine to perform any one or more of the methodologies described herein. Accordingly, a “machine-readable medium” refers to a single storage apparatus or device, as well as “cloud-based” storage systems or storage networks that include multiple storage apparatus or devices. The term “machine-readable medium” excludes signals per se. 
     “COMPONENT” in this context refers to a device, a physical entity, or logic having boundaries defined by function or subroutine calls, branch points, APIs, or other technologies that provide for the partitioning or modularization of particular processing or control functions. Components may be combined via their interfaces with other components to carry out a machine process. A component may be a packaged functional hardware unit designed for use with other components and a part of a program that usually performs a particular function of related functions. Components may constitute either software components (e.g., code embodied on a machine-readable medium) or hardware components. A “hardware component” is a tangible unit capable of performing certain operations and may be configured or arranged in a certain physical manner. In various example embodiments, one or more computer systems (e.g., a standalone computer system, a client computer system, or a server computer system) or one or more hardware components of a computer system (e.g., a processor or a group of processors) may be configured by software (e.g., an application or application portion) as a hardware component that operates to perform certain operations as described herein. A hardware component may also be implemented mechanically, electronically, or any suitable combination thereof. For example, a hardware component may include dedicated circuitry or logic that is permanently configured to perform certain operations. A hardware component may be a special-purpose processor, such as a Field-Programmable Gate Array (FPGA) or an Application-Specific Integrated Circuit (ASIC). A hardware component may also include programmable logic or circuitry that is temporarily configured by software to perform certain operations. For example, a hardware component may include software executed by a general-purpose processor or other programmable processor. Once configured by such software, hardware components become specific machines (or specific components of a machine) uniquely tailored to perform the configured functions and are no longer general-purpose processors. It will be appreciated that the decision to implement a hardware component mechanically, in dedicated and permanently configured circuitry, or in temporarily configured circuitry (e.g., configured by software) may be driven by cost and time considerations. Accordingly, the phrase “hardware component” (or “hardware-implemented component”) should be understood to encompass a tangible entity, be that an entity that is physically constructed, permanently configured (e.g., hardwired), or temporarily configured (e.g., programmed) to operate in a certain manner or to perform certain operations described herein. 
     Considering embodiments in which hardware components are temporarily configured (e.g., programmed), each of the hardware components need not be configured or instantiated at any one instance in time. For example, where a hardware component comprises a general-purpose processor configured by software to become a special-purpose processor, the general-purpose processor may be configured as respectively different special-purpose processors (e.g., comprising different hardware components) at different times. Software accordingly configures a particular processor or processors, for example, to constitute a particular hardware component at one instance of time and to constitute a different hardware component at a different instance of time. 
     Hardware components can provide information to, and receive information from, other hardware components. Accordingly, the described hardware components may be regarded as being communicatively coupled. Where multiple hardware components exist contemporaneously, communications may be achieved through signal transmission (e.g., over appropriate circuits and buses) between or among two or more of the hardware components. In embodiments in which multiple hardware components are configured or instantiated at different times, communications between or among such hardware components may be achieved, for example, through the storage and retrieval of information in memory structures to which the multiple hardware components have access. For example, one hardware component may perform an operation and store the output of that operation in a memory device to which it is communicatively coupled. A further hardware component may then, at a later time, access the memory device to retrieve and process the stored output. Hardware components may also initiate communications with input or output devices, and can operate on a resource (e.g., a collection of information). 
     The various operations of example methods described herein may be performed, at least partially, by one or more processors that are temporarily configured (e.g., by software) or permanently configured to perform the relevant operations. Whether temporarily or permanently configured, such processors may constitute processor-implemented components that operate to perform one or more operations or functions described herein. As used herein, “processor-implemented component” refers to a hardware component implemented using one or more processors. Similarly, the methods described herein may be at least partially processor-implemented, with a particular processor or processors being an example of hardware. For example, at least some of the operations of a method may be performed by one or more processors or processor-implemented components. Moreover, the one or more processors may also operate to support performance of the relevant operations in a “cloud computing” environment or as a “software as a service” (SaaS). For example, at least some of the operations may be performed by a group of computers (as examples of machines including processors), with these operations being accessible via a network (e.g., the Internet) and via one or more appropriate interfaces (e.g., an API). The performance of certain of the operations may be distributed among the processors, not only residing within a single machine, but deployed across a number of machines. In some example embodiments, the processors or processor-implemented components may be located in a single geographic location (e.g., within a home environment, an office environment, or a server farm). In other example embodiments, the processors or processor-implemented components may be distributed across a number of geographic locations. 
     “PROCESSOR” in this context refers to any circuit or virtual circuit (a physical circuit emulated by logic executing on an actual processor) that manipulates data values according to control signals (e.g., “commands,” “op codes,” “machine code,” etc.) and which produces corresponding output signals that are applied to operate a machine. A processor may, for example, be a Central Processing Unit (CPU), a Reduced Instruction Set Computing (RISC) processor, a Complex Instruction Set Computing (CISC) processor, a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), an ASIC, a Radio-Frequency Integrated Circuit (RFIC), or any combination thereof. A processor may further be a multi-core processor having two or more independent processors (sometimes referred to as “cores”) that may execute instructions contemporaneously. 
     “TIMESTAMP” in this context refers to a sequence of characters or encoded information identifying when a certain event occurred (for example, giving date and time of day, sometimes accurate to a small fraction of a second).