Abstract: The present disclosure relates to a persistent data structure employed as a tree structure with a frequent pattern mining paradigm. The number of nodes in the tree structure scales linearly with respect to the number unique items within the itemsets associated with the nodes. With the disclosed pattern mining paradigm, compressed representations of maximal patterns may be mined with the goal of detecting a frequent maximal pattern covers in a top down approach. Thus, large patterns are detected before their subsets yielding a significant reduction in computation time. The persistent data structure is a dynamic data structure which may be updated to add or delete nodes or transactional information without the need for recreating the entire tree structure. Furthermore, the persistent data structure may be run by a computing system either locally or on a parallelized distributed computing architecture to increase operational performance.

Abstract: Method, system and media for authenticating a subject as a user. Embodiments generate visual stories specific to the user and for which the subject must select the corresponding images from among a plurality of decoy images. Gaze tracking can be used to determine which images the user has selected without allowing an observer to learn which images have been selected. Images for the visual story can be retrieved from the user's social networking profile, and corresponding text storied generated to indicate which images should be selected. Multiple security levels are possible by varying the number of story images and decoy images.

Abstract: Method, system and media for authenticating a subject as a user. Embodiments generate visual stories specific to the user and for which the subject must select the corresponding images from among a plurality of decoy images. Gaze tracking can be used to determine which images the user has selected without allowing an observer to learn which images have been selected. Images for the visual story can be retrieved from the user's social networking profile, and corresponding text storied generated to indicate which images should be selected. Multiple security levels are possible by varying the number of story images and decoy images.

Abstract: A method, system, and medium are provided for identifying terrestrial objects that have changed in a certain manner. One embodiment of the method includes receiving a query that includes one or more inputs, which are related to 1) a first terrestrial object (“first object”) and 2) source change-detection information that describes change associated with the first object; applying the query to a dataset that includes indexed information that describes the imagery; based on the one or more inputs, receiving a query result by identifying a set of regions in the dataset that are respectively associated with change information that is similar to that of the source change-detection information; and presenting on a presentation device indications of at least a portion of the identified set of regions.

Abstract: A method, system, and medium are provided for identifying terrestrial objects that have changed in a certain manner. One embodiment of the method includes receiving a query that includes one or more inputs, which are related to 1) a first terrestrial object (“first object”) and 2) source change-detection information that describes change associated with the first object; applying the query to a dataset that includes indexed information that describes the imagery; based on the one or more inputs, receiving a query result by identifying a set of regions in the dataset that are respectively associated with change information that is similar to that of the source change-detection information; and presenting on a presentation device indications of at least a portion of the identified set of regions.

Abstract: A method, system, and medium are provided for presenting aspects of change associated with a geographic area that has been captured by high-resolution, remotely sensed imagery.

Abstract: A method, system, and medium are provided for detecting change in a geographic area. One embodiment includes receiving a set of remotely sensed imagery that depicts the geographic area, automatically identifying changes in physical features of the geographic area by comparing, without user intervention, the set of remotely sensed imagery to a dataset of previously stored remotely sensed imagery that also depicts the geographic area, and deriving a change-quality measurement associated with the set of remotely sensed imagery, wherein the change-quality measurement quantifies a suitability of comparison of the set of remotely sensed imagery to the previously stored remotely sensed imagery.

Abstract: A method, system, and medium are provided for revising a first set of search results related to high-resolution satellite imagery. One embodiment of the method includes receiving a query that seeks high-resolution, remotely sensed images of geographic areas that have changed consistent with a given change signature; returning indications of the geographic areas; and presenting a first set of images that corresponds to the indications; presenting a set of feedback of options in connection with each of the set of images, wherein the feedback options include one or more of a more-like-this option and a less-like-this option; such that a second set of images can be identified based on receiving input by way of the feedback options.

Abstract: A method, system, and medium are provided for identifying terrestrial objects that have changed in a certain manner. One embodiment of the method includes receiving a query that includes one or more inputs, which are related to 1) a first terrestrial object (“first object”) and 2) source change-detection information that describes change associated with the first object; applying the query to a dataset that includes indexed information that describes the imagery; based on the one or more inputs, receiving a query result by identifying a set of regions in the dataset that are respectively associated with change information that is similar to that of the source change-detection information; and presenting on a presentation device indications of at least a portion of the identified set of regions.

Abstract: A method, system, and medium are provided for identifying terrestrial objects that have changed in a certain manner. One embodiment of the method includes receiving a query that includes one or more inputs, which are related to 1) a first terrestrial object (“first object”) and 2) source change-detection information that describes change associated with the first object; applying the query to a dataset that includes indexed information that describes the imagery; based on the one or more inputs, receiving a query result by identifying a set of regions in the dataset that are respectively associated with change information that is similar to that of the source change-detection information; and presenting on a presentation device indications of at least a portion of the identified set of regions.

Abstract: A method, system, and medium are provided for detecting change in a geographic area. One embodiment includes receiving a set of remotely sensed imagery that depicts the geographic area, automatically identifying changes in physical features of the geographic area by comparing, without user intervention, the set of remotely sensed imagery to a dataset of previously stored remotely sensed imagery that also depicts the geographic area, and deriving a change-quality measurement associated with the set of remotely sensed imagery, wherein the change-quality measurement quantifies a suitability of comparison of the set of remotely sensed imagery to the previously stored remotely sensed imagery.

Abstract: A method, system, and medium are provided for revising a first set of search results related to high-resolution satellite imagery. One embodiment of the method includes receiving a query that seeks high-resolution, remotely sensed images of geographic areas that have changed consistent with a given change signature; returning indications of the geographic areas; and presenting a first set of images that corresponds to the indications; presenting a set of feedback of options in connection with each of the set of images, wherein the feedback options include one or more of a more-like-this option and a less-like-this option; such that a second set of images can be identified based on receiving input by way of the feedback options.

Abstract: A method, system, and medium are provided for identifying facilitating storage and retrieval of information associated with high-resolution, remotely sensed imagery. In one embodiment, a data structure includes information derived from change-detection information associated with remotely sensed imagery, which change-detection information is useable by the application program, and wherein the data structure includes a plurality of change indexes, each of which (1) indicates change in a given item from a first state to a second state and (2) is associated with a feature set that includes one or more of item-texture features and item-spectral features, wherein each of the change indexes is an entropy balanced statistical (EBS) k-d tree index that describes features associated with items within a geographic area that is reflected in the imagery, and wherein the features include one or more of the item-texture features and item-spectral features.

Abstract: A method, system, and medium are provided for presenting aspects of change associated with a geographic area that has been captured by high-resolution, remotely sensed imagery.