Abstract:
A server computer receives web request events corresponding to web requests issued by users. Each web request event includes: a cookie that identifies the user computer that originated the corresponding web request; an IP address corresponding to the user computer; and a date/time stamp indicating when the corresponding web request was received at a web server. The server stores the web request events. The server selects a subset of the web request events, all of which are associated with the same cookie. Then the server computes a geographical location corresponding to the user computer, where the computation uses the IP address associated with the web request event. The server determines the local time and day of week corresponding to the web request. The server then classifies the user computer based, at least in part, on a usage pattern corresponding to the web request events in the subset.
Abstract:
A TV audience survey system for determining the TV viewing activities of a plurality of individuals in a household includes a master device and multiple tags, each tag assigned to an individual. After an individual logs into the system and starts watching the TV, the master device communicates with the corresponding tag repeatedly to accumulate data representing the individual's TV viewing activities. Such data can be used to determine when the individual stops watching the TV for an extended period of time without logging out of the system and when the household member remains watching the TV after logging or being logged out of the system. The master device then reports the accumulated data to a remote server, which uses the data to determine whether the individual complies with the logging protocol defined by the TV audience survey system and update the TV viewership data associated with this household.
Abstract:
A modelling system is provided in which a model generation computer (3) stores within a model database (17) a plurality of principle component analysis models (18-1-18n) for modelling individuals. The principle component analysis models (18-1-18-n) are generated from data sets of individuals sharing identifying characteristics e.g. the same gender/ethnicity/age etc. When a new image is to be modelled using the system, characterising data for the new individual is received together with an image of that individual. The characterising data is used to select from the model database (17) a principle component analysis model (18-1-18-n) where the principle component analysis model selected comprises a model generated utilising images of individuals sharing the identifying characteristics corresponding to the characterisation data for the individual to be modelled.
Abstract:
A gaze tracking system (1,3,8) is provided which obtains images of an operator (9) and processes the images to associate the images with coordinates of where the operators gaze is directed towards.In order to identify images where an operator is looking in the same direction, images obtained by a camera (8) are first processed using the retinex algorithm. Image patches from the processed image are then compared with stored feature images and an initial classification based upon the correspondence between areas of the processed image and the stored feature images is determined. This initial classification is then further processed and each image is assigned a single classification. The areas identified by different classifications are then determined so that classifications assigned to adjacent images identify points closer together and classifications never assigned to an adjacent images identify points further apart.
Abstract:
In an image processing system, a three-dimensional computer model is created of a real-world static background scene. Video images of objects moving on the background are recorded and processed to identify the portions of the image corresponding to the moving objects and to calculate the corresponding positions in the three-dimensional computer model. Each moving object is represented by at least one vertical plane in the three-dimensional computer model. Images, comprising the simulated background and the moving object planes onto which are rendered the video data of the moving object recorded by the video camera, are displayed to the user from any desired viewing direction(s).