US20070088735A1 - Optimization-based visual context management - Google Patents
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/903—Querying
- G06F16/9038—Presentation of query results
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/248—Presentation of query results
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/30—Information retrieval; Database structures therefor; File system structures therefor of unstructured textual data
- G06F16/33—Querying
- G06F16/332—Query formulation
- G06F16/3329—Natural language query formulation or dialogue systems
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- G06T11/00—2D [Two Dimensional] image generation
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Definitions
- the present invention generally relates to information-seeking systems and, more particularly, to optimization-based techniques for visual context management in such information-seeking systems.
- visual context management a process that dynamically determines how to incorporate newly requested information into an existing visual context so that users can comprehend all relevant information as a coherent whole.
- visual context refers to a visual scene that a user perceives when issuing a query.
- Such a process is often subject to diverse constraints (e.g., ensuring semantic continuity and minimizing visual clutter) and unanticipated information introduced during a human-computer conversation. For example, the introduction of a particular visual object to convey a new piece of data may be affected by the existing visual objects for presenting related pieces of data. Without integrating new information into an existing scene, a user may have difficulty in comparing and combining information.
- Principles of the invention provide improved visual context management techniques. Such improved visual context management techniques may be used to create improved information-seeking systems.
- a technique for updating an existing visual display to incorporate new information comprises obtaining new information requested by a subsequent user query, and dynamically deriving one or more visual transformations for updating at least a portion of the existing display to incorporate the new information, wherein the transformation derivation is modeled as an optimization operation which attempts to balance visual context management constraints and to achieve a desired presentation of intended information.
- the step of dynamically deriving visual transformations to incorporate new information into the existing display may further comprise modeling the visual context management constraints as feature-based desirability metrics.
- the feature-based metrics may measure one or more of a display overlap value, a perceptual landmark preservation value, a transition smoothness value, a visual ordering value, a visual clutter value.
- the feature-based metrics may be formulated using user information, e.g., a data navigation preference of the user.
- the step of dynamically deriving visual transformations to incorporate new information into the existing display may further comprise performing the optimization operation such that the desirability metrics are maximized for one or more visual transformation operators.
- the optimization operation may comprise a global optimization technique, e.g., a simulated-annealing technique.
- principles of the invention model visual context management as an optimization problem.
- One main objective is to find a set of optimal visual transformations that maximize the satisfaction of all relevant constraints (e.g., ensuring semantic continuity and minimizing visual clutter).
- principles of the invention are capable of deriving a set of near optimal visual transformations by simultaneously balancing a comprehensive set of constraints.
- Such techniques are easily extensible, since they preferably use feature-based metrics to uniformly model all visual context management constraints.
- FIG. 1 is a diagram illustrating an intelligent, context-sensitive information-seeking system employing a visual context management component, according to one embodiment of the present invention
- FIG. 2 is a diagram illustrating a first recorded user-system conversation fragment, according to one embodiment of the present invention
- FIG. 3 is a diagram illustrating a visual context management framework, according to one embodiment of the present invention.
- FIG. 4 is a diagram illustrating a visual output generation methodology, according to one embodiment of the present invention.
- FIG. 5 is a diagram illustrating a second recorded user-system conversation fragment, according to one embodiment of the present invention.
- FIG. 6 is a diagram illustrating a third recorded user-system conversation fragment, according to one embodiment of the present invention.
- FIG. 7 is a diagram illustrating a fourth recorded user-system conversation fragment, according to one embodiment of the present invention.
- FIG. 8 is a diagram illustrating a fifth recorded user-system conversation fragment, according to one embodiment of the present invention.
- FIG. 9 is a diagram illustrating a computer system suitable for implementing an information-seeking system, according to one embodiment of the present invention.
- data objects to broadly refer to any type of data content that is intended to be presented (e.g., a list of house listings residing in a real-estate database or a list of hotels existing on a website).
- media objects broadly to refer to any type of media that is available to be used to present the data content, such as but not limited to speech, text, and graphics.
- context to refer to the situation where the presentation of the intended data content is given. This may include information, such as but not limited to, the tasks that users are performing, the conversation context that has been established during the human-computer interaction, the user model including user preferences and interests, and the environment model including device properties.
- principles of the present invention provides a framework, system, and methods for dynamically updating an existing visual display associated with an information-seeking system to effectively incorporate new information requested by subsequent user queries.
- Such techniques dynamically derive one or more visual transformations for updating at least a portion of the existing display to incorporate new information, wherein visual context management is modeled as an optimization operation which attempts to balance diverse visual context management constraints and to achieve a desired presentation of intended information.
- FIG. 1 a diagram illustrates an intelligent, context-sensitive information-seeking system employing a visual context management component, according to one embodiment of the present invention. It is to be appreciated that such a system may also be referred to as a “conversation system” since a sequence of one or more queries and one or more responses between a user and the system may generally be referred to as a conversation.
- a conversation a sequence of one or more queries and one or more responses between a user and the system may generally be referred to as a conversation.
- information-seeking system 100 comprises interpretation module 102 , conversation management module 104 , content determination module 106 , context management module 108 and presentation design module 110 .
- conversation management module 104 may be used by conversation management module 104 .
- context management module 108 may be used by context management module 108 .
- visual context management techniques of the invention are preferably implemented in presentation design module 110 .
- the input to system 100 is a user request, given in one or more forms (e.g., through a graphical user interface or by speech and gesture).
- interpretation module 102 is employed to understand the meaning of the request.
- conversation management module 104 decides the suitable system actions at a high level. Depending on the context, it may decide to honor the user request directly by presenting the requested data or it may choose to ask the user additional questions. Since a high-level system act does not describe the exact content to be presented, it is then sent to content determination module 106 to be refined.
- Content determination module 106 decides the proper data content of a response based on the interaction context (e.g., how much data is retrieved based on the current user query and the available presentation resource such as time and space).
- Context management module 108 manages and provides needed contextual information for making various decisions (e.g., the user interests and preferences). While not limited thereto, there are three common types of contexts: conversation context; user context; and the environment context. Such information may be stored in one or more databases.
- the conversation information records the sequences of user requests and the computer responses.
- the user information includes user preferences and interests.
- the environment information includes the information about the system environment, e.g., what type of display is used.
- a media allocation component (not expressly shown but which may, for example, be the one described in U.S. patent application Ser. No. 11/031,951, filed Jan. 7, 2005 and entitled “Optimization-Based Media Allocation,” the disclosure of which is incorporated by reference herein) may be used to allocate different media to convey the intended data in the form of one or more data-media mappings.
- presentation design module 110 Such results are then sent to presentation design module 110 to be presented.
- visual context management techniques of the invention are preferably implemented in presentation design module 110 .
- the information-seeking system 100 supports context-sensitive information access and exploration through use of intelligent multimodal conversation. Specifically, the system allows users to express their information requests in context using multiple modalities, including natural language, graphical user interface (GUI), and gesture. Moreover, the system dynamically creates a tailored response, including visual and spoken outputs, e.g., see FIG. 2 . While the information-seeking system may be implemented in any variety of applications, two illustrative applications are used herein to describe features of the system, namely, a real-estate application that helps users to search for residential properties and a hospitality application that aids users in finding hotels and relevant amenities (e.g., restaurants).
- a real-estate application that helps users to search for residential properties
- a hospitality application that aids users in finding hotels and relevant amenities (e.g., restaurants).
- the information-seeking system automatically creates its response in three steps.
- the system decides the type of a response.
- the system decides to present the requested houses directly.
- the system may formulate different types of responses. For example, it may ask the user to supply additional constraints if the retrieved data set is very large.
- the system determines the content of the response.
- the system selects a subset of house attributes such as the price and style.
- the system designs the form of the response using suitable media and presentation techniques. For example, in system response R 1 in FIG. 2 , the system uses graphics to display house data on a map and speech to summarize the number of retrieved houses.
- the information-seeking system creates a response R 2 that emphasizes the cheapest house while preserving most of the existing visual context of R 1 .
- the system zooms in on the requested house and keeps others to their minimum (response R 2 ′).
- visual context to refer to a visual scene that a user perceives when issuing a query. Without integrating new information into an existing scene, a user may have difficulty in comparing and combining information. For example, if response R 2 displays only the cheapest house, the user may not easily relate this house to others retrieved earlier.
- the information-seeking system tailors its response to a user request at run time.
- Principles of the invention focus on visual context management, a process that dynamically determines how to incorporate newly requested information into an existing visual context so that users can comprehend all relevant information as a coherent whole. More precisely, visual context management is used to derive a set of visual transformations, which updates the existing context to incorporate the new information. For example, to obtain response R 2 in FIG. 2 , the system updates R 1 by adding details to the cheapest house and simplifying other retrieved houses.
- FIG. 3 a diagram illustrates a presentation design module (e.g., module 110 in FIG. 1 ), according to one embodiment of the present invention. More particularly, FIG. 3 depicts an example embodiment of an optimization-based visual context management framework. That is, the visual context management techniques, implemented by the presentation design module, dynamically determine how to incorporate newly requested information into an existing visual context so that users can comprehend all relevant information as a coherent whole.
- the input to framework 300 includes existing context (as will be explained in more detail below) and presentation results in the form of one or more data objects to be conveyed and a set of one or more available media objects.
- the data objects may be a set of houses requested by a user to be presented, and the media objects may include available media to be used such as speech, text, and graphics.
- visual context manager 302 an optimized presentation is generated. Illustrative details of how such an optimized presentation may be generated will now be explained.
- FIG. 4 provides an overview of operations of presentation design module 300 ( FIG. 3 ), also referred to herein as a visual designer.
- the visual designer automatically creates a visualization to address a given user query.
- it is a three-step process.
- a sketch generator creates a visual sketch, which uses a set of visual objects to encode the data to be visualized.
- a conventional sketch generation technique may be used, by way of example only, the techniques described in M. Zhou and M. Chen, “Automated Generation of Graphic Sketches by Examples,” IJCAI '03, pp. 65-71, 2003, the disclosure of which is incorporated by reference herein.
- a visual layout manager determines the size and location of the visual objects in the sketch. Specifically, the process automatically derives a set of spatial layout constraints, such as ensuring visual balance and avoiding object occlusion.
- the process may use a non-linear constraint solver to solve geometric constraints (e.g., proportional and layering constraints), and a space manager to position floating objects (e.g., callouts and textual labels).
- a context manager updates the existing visual context to incorporate the sketch.
- the process may be implemented as a three-step pipeline, these three steps may be inter-twined.
- the layout manager since the layout manager knows little about what the context manager would do, it may need to relocate the objects after the context manager decide what to keep/delete. To avoid going back and forth between the two steps, the layout manager may compute a range of candidate size and location parameters for each visual object in the scene.
- a user's data navigation preference impacts visual context management.
- query U 2 in FIG. 2 may imply that the user is browsing the data
- query U 2 ′ may suggest that the user is filtering the data.
- the system may uses language cues, such as words “just” or “which one,” to infer the user intention. Accordingly, for query U 2 , the system preserves most of the visual context to facilitate further data browsing (response R 2 ), while zooming in on the cheapest house for query U 2 ′ to satisfy data filtering (response R 2 ′).
- a user's conversation preference affects visual context management.
- the system assumes that a user conducts a continuous conversation and interprets a user query in the context of previous queries.
- query U 3 in FIG. 5 is issued after query U 1 in FIG. 2 .
- the system presents the requested city data while preserving the relevant houses shown in response R 1 .
- a user may want to start a new context.
- the system may permit a user to click on a “new context” button to indicate his context switching preference.
- the user issues query U 4 in FIG. 6 to switch to a new context. In this case, the system creates a new visual output that only shows the requested school data.
- various visualization constraints such as maintaining continuity across displays and minimizing visual clutter, influence visual context management.
- the system incorporates the requested city data in the context of relevant houses.
- the system displays the requested restaurants along with the hotels retrieved earlier, although the restaurants and the hotels are remotely related according to our data ontology.
- the system also maintains important perceptual landmarks and provides smooth transitions. For example, in FIG. 2 , the system preserves the geographical landmarks, such as the Hudson River and major highways, which helps to anchor the visual transition. Moreover, the system ensures smooth visual transitions to allow users to keep track of the changes. For example, the system may animate camera changes and visual object updates.
- the system considers a wide variety of visual context management constraints, including accommodating user preferences, ensuring visual continuity, and minimizing visual clutter. These constraints often exhibit inter-dependencies and may even conflict with one another. For example, preserving semantic continuity may violate a visual clutter reduction constraint. It thus would be very difficult to maintain a coherent visual context using simple heuristics, which may not be able to balance all constraints.
- a visual context is continuously updated during a user-system conversation.
- S t denotes the visual context at the beginning of the turn
- S t+1 is the visual context at the end of the turn.
- Visual context S t consists of a set of visual objects.
- the visual context contains objects such as retrieved houses and cities (R 1 ).
- R 1 retrieved houses and cities
- Feature foci describes the current query focus, while scope includes all information to appear in the new scene.
- foci are the requested train stations, while scope includes both the train stations and the house constraining the train stations.
- a visual object is an encoding of a data object and has basic visual properties, such as color, size, and location.
- data features such as category to describe the semantic category of the encoded data
- visual features such as prominence to specify how a visual encoding may be perceived.
- Table 1 below lists semantic features that the system uses. Among these features, we focus on explaining three complex ones: data importance (dImportance), visual importance (vImportance), and visual prominence (prominence).
- Visual object-level features Category semantic category of data defined in a data ontology Landmark whether an object is a landmark specified by ontology shapeComplexity how complex a shape it is - a pre-assigned score dImportance* how semantically important it is to the current context vImportance* how visually important it is to the current context prominence* how visually prominent it appears
- Visual scene-level features Volume* number of visual objects in a scene colorVariety* number of different colors in a scene Shape Variety* number of different geometric shapes in a scene
- Data importance indicates how important a data object is to a given user turn. All data objects start with the same importance value (0.0).
- the system dynamically updates the data importance in two ways. First, the system uses its content selector to decide the data importance. If the content selector chooses a data object to present at a given user turn, it updates the importance of this object accordingly. For query U 8 in FIG. 8 , the content selector selects the requested train station data with the highest importance and the house constraining the train stations with a lower importance. If a data object is not selected, its importance is then reduced using a time decay function. For example, to respond to U 2 in FIG. 2 , the system does not select the houses shown earlier, except the cheapest one. Accordingly, their importance values are reduced at turn U 2 . In a special case where a user starts a new context, the system resets the importance to 0.0 for non-selected data.
- the system uses the data relationships to decide data importance. This is very useful when the content selector assigns the same importance to multiple data objects.
- R 1 FIG. 2
- the content selector assigns the same importance to all retrieved houses. Since these houses are not mentioned in U 3 ( FIG. 5 ), their importance is reduced. However houses located in Hartsdale are more semantically relevant to U 3 than others are. As a result, the system better preserves these houses to provide the user a useful context to comprehend the retrieved city data ( FIG. 5 ).
- ⁇ is a function indicating the relevance value of the relation r between d and d′ j in a database.
- the system uses a data ontology to look up the data relation r between d and d′ j . It then uses the database to verify the relation.
- d be a house
- d′ j be a city in a database.
- d′ j be a city in a database.
- a house is located-in a city.
- I d ⁇ ( d , t + 1 ) ⁇ val , if ⁇ ⁇ d ⁇ ⁇ is ⁇ ⁇ selected ⁇ ⁇ at ⁇ ⁇ turn ⁇ ⁇ t + 1 0.0 , if ⁇ ⁇ new ⁇ ⁇ context ⁇ ⁇ starts , otherwise Max ⁇ [ I d ⁇ ( d , t ) ⁇ exp ⁇ ( - ⁇ ) , R s ⁇ ( d , D ′ ) ] ( 1 )
- Visual importance While data importance assesses how a visual object is related to a user query semantically, visual importance measures how the visual object is related to the current query foci spatially.
- visual importance measures how the visual object is related to the current query foci spatially.
- Visual prominence measures how easily a visual object can be perceived by a user. It is modeled using three basic visual variables: color, size, and location. Given a visual object v, we define its color prominence P 1 (v), size prominence P 2 (v), and location prominence P 3 (v).
- Color prominence states that the more contrast a visual object produces against a background, the more prominent it can be perceived. For example, a red object is more prominent than a yellow object against a white background.
- Location prominence states that objects placed near the center of a display are more prominent than those located elsewhere:
- Visual operators can be categorized based on their effects. We have identified four groups of operators: camera operators that modify the parameters of a camera, appearance operators that update visual appearance (e.g., Highlight), geometry operators that change geometric properties (e.g., Move and Scale), and structural operators that modify a scene structure (e.g., Add). Table 2 below lists operators that the system uses. Depending on the actual implementation, an operator may exhibit different visual effects. For example, we may implement Delete by making objects transparent or simply hiding them.
- Feature operand denotes visual objects that an operator manipulates, and feature parameter holds the specific information that is required to perform the intended transformation.
- operator Scale has one parameter scaleFactor.
- Feature effect is a function measuring what properties of the operands are to be modified after the operation. For example, Scale changes the size of an object.
- feature cost estimates the cost of performing the intended visual transformation. Cost measures the perceptual cost needed for a user to perceive the transformation. For example, it is more costly for a user to perceive object movements than highlighting effects.
- features temporal-priority, startTime and endTime control the timing of applying an operator.
- a number of constraints influence visual context management, including user preferences and visualization constraints.
- visual momentum metrics assess the coherence of a visual context across displays.
- Visual structuring metrics evaluate the structural coherence of a visual context after the new information is integrated.
- Our purpose here is not to enumerate a complete set of visual context management constraints, instead we show how to formulate key constraints quantitatively. For simplicity, all feature/metric values are normalized to lie between [0, 1].
- Visual momentum measures a user's ability to extract and integrate information across multiple displays. Since the amount of visual momentum is proportional to a user's ability of comprehending information across displays, the system tries to maximize the visual momentum when updating a visual context. Specifically, we employ three techniques that are applicable to our visual context management task: 1), maximizing both semantic and visual overlaps of consecutive displays, 2) preserving perceptual landmarks, and 3), ensuring smooth visual transitions.
- inv( v i,t+1 ) Avg[inv_loc( v i,t , v i,t+1 ), inv_size(v i,t , v i,t+1 ), inv_color(v i,t , v i,t+1 )].
- Perceptual landmarks are distinguishable features that anchor a visual context transition, which in turn helps users to relate information in successive scenes.
- the Westchester county map serves as a common background for displays depicted in FIGS. 2 and 4 - 6 and key geographical landmarks such as major rivers and highways persist in scenes whenever possible (e.g., Hudson river in FIG. 2 ).
- L ( S t+1 ) L t+1 /N, (5) where L t+1 is the number of landmarks existing in visual context S t+1 , and N is the total number of landmarks existing in an entire application.
- the above metric states that the less mental cost that an operator incurs, the more smooth transition that a user perceives.
- ⁇ ⁇ ( S t + 1 ) ⁇ i ⁇ ⁇ j ⁇ l - ⁇ l ⁇ ( d i , v i ) ⁇ P ⁇ ( v j ) - l ⁇ ( d j , v j ) ⁇ P ⁇ ( v i ) ⁇ ( 8 )
- d i a nd d j are data objects, and v i and v j are their corresponding encoding at turn t+1.
- P t+1 ( ) computes the visual prominence by Formula 3.
- Minimizing Visual Clutter A visually cluttered presentation may create confusions and make the scene impossible to scan.
- N the total of visual objects in S t+1
- shape Variety( ) and shapeComplexity( ) are two features defined in Table 1.
- the input to the algorithm is visual context S at the beginning of user turn t+1, and a new scene S′ to be integrated.
- the algorithm uses a “temperature” parameter T to populate the desired result list iteratively (lines 2 - 15 ).
- routine find_operator( ) uses a greedy strategy to find a top candidate (line 5 ). Specifically, it computes a reward( ) for applying already selected operators and an operator op to a visual object that has not been updated by the same operator (Formula 10). It then ranks all candidates by their reward values and returns the top one.
- the algorithm tests whether the reward be greater than that of using the existing result set alone (lines 7 - 8 ). If it is better, the candidate is then added to the result set (line 9 ). Otherwise, it tests whether the current control probability is greater than a random number generated by rand( ) between [0, 1] (line 10 ). If it is true, the candidate is then added (line 11 ).
- parameter T controls the probability of accepting sub-optimal operators. It is then gradually reduced so that the algorithm is less likely to accept suboptimal operators (line 14 ).
- T When the algorithm eventually converges (i.e., T reaches a target minimum temperature), it returns a set of visual operators that maximizes our objective function in Formula 10 (line 16 ).
- the complexity find_operator( ) is O(n 2 ⁇ m 2 ), where n is the total number of visual objects in S t and S′, and m is the number of available operators. Since the number of steps in temperature decrease and the total number of samples evaluated at each temperature are constants, the total complexity of our algorithm is O(n 2 ⁇ m 2 ).
- the system groups the operators by their type and by their operands. For example, the system groups together all Highlight operators that have the same type of operands. The system then determines the order of applying these operators. Operators within a group may be applied at the same time. Such application guides users to recognize perceptual groupings during visual transition. For example, highlighting a group of houses simultaneously allows users to perceive them as a group. Moreover, operators in different groups are ordered by their temporal priority. For example, Delete normally occurs before Add to prevent the obsolete data from clobbering the new data. Now we statically define the temporal priority for each type of operator.
- three steps are used to set up the visual context management method.
- the inventive approach to visual context management is applicable to the broader problem of creating better visualizations.
- it can be used in a GUI-driven interactive visualization system, where a more coherent visualization can he produced to integrate information obtained across multiple turns of user interaction.
- our optimization-based approach dynamically balances a comprehensive set of constraints for diverse interaction situations. It is also easily extensible, since we can easily incorporate new features/constraints. We have applied our work to two different applications, and our study shows that the system performs adequately against human designers.
- FIG. 9 a diagram illustrates a computer system suitable for implementing an information-seeking system, according to one embodiment of the present invention.
- the illustrative architecture of FIG. 9 may be used in implementing any and all of the components and/or steps described in the context of FIGS. 1 through 8 .
- the computer system 900 may be implemented in accordance with a processor 902 , a memory 904 , I/O devices 906 , and a network interface 908 , coupled via a computer bus 910 or alternate connection arrangement.
- processor as used herein is intended to include any processing device, such as, for example, one that includes a CPU (central processing unit) and/or other processing circuitry. It is also to be understood that the term “processor” may refer to more than one processing device and that various elements associated with a processing device may be shared by other processing devices.
- memory as used herein is intended to include memory associated with a processor or CPU, such as, for example, RAM, ROM, a fixed memory device (e.g., hard drive), a removable memory device (e.g., diskette), flash memory, etc.
- input/output devices or “I/O devices” as used herein is intended to include, for example, one or more input devices (e.g., keyboard, mouse, etc.) for entering data to the processing unit, and/or one or more output devices (e.g., speaker, display, etc.) for presenting results associated with the processing unit.
- input devices e.g., keyboard, mouse, etc.
- output devices e.g., speaker, display, etc.
- network interface as used herein is intended to include, for example, one or more transceivers to permit the computer system to communicate with another computer system via an appropriate communications protocol.
- software components including instructions or code for performing the methodologies described herein may be stored in one or more of the associated memory devices (e.g., ROM, fixed or removable memory) and, when ready to be utilized, loaded in part or in whole (e.g., into RAM) and executed by a CPU.
- ROM read-only memory
- RAM random access memory
- the present invention also includes techniques for providing visual context management services.
- a service provider agrees (e.g., via a service level agreement or some informal agreement or arrangement) with a service customer or client to provide visual context management services. That is, by way of one example only, the service provider may host the customer's web site and associated applications. Then, in accordance with terms of the contract between the service provider and the service customer, the service provider provides visual context management services that may include one or more of the methodologies of the invention described herein.
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EP (1) | EP1952275A4 (ja) |
JP (1) | JP4949407B2 (ja) |
CN (1) | CN101292240B (ja) |
CA (1) | CA2625726C (ja) |
WO (1) | WO2007046847A2 (ja) |
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Also Published As
Publication number | Publication date |
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CN101292240A (zh) | 2008-10-22 |
US9298855B2 (en) | 2016-03-29 |
CN101292240B (zh) | 2012-03-28 |
EP1952275A4 (en) | 2009-04-08 |
EP1952275A2 (en) | 2008-08-06 |
JP2009512061A (ja) | 2009-03-19 |
CA2625726C (en) | 2019-03-05 |
WO2007046847A2 (en) | 2007-04-26 |
US20080306988A1 (en) | 2008-12-11 |
CA2625726A1 (en) | 2007-04-26 |
JP4949407B2 (ja) | 2012-06-06 |
WO2007046847A3 (en) | 2008-02-14 |
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