Abstract: An image scaling method based on a linear extension/contraction mode, includes step I: compressing an original image matrix composed of image pixels in a row by row manner with a Linearlization or OptimalPLR compression method to obtain a line segment segmentation form; step II: lengthening the line segments under Policy I or shortening the line segments under Policy II by resampling at a upscaling or downscaling factor, to obtain an upscaled or downscaled image in the row direction; and step III: upscaling the data upscaled in the row direction in the step II in a column by column manner through the process in the step II, to obtain an image upscaled in the column direction. The method which is an image scaling technique directly based on PLA for data compression, not only can compress static image data, but also can compress image data of dynamic data streams.

Abstract: An image scaling method based on a linear extension/contraction mode, includes step I: compressing an original image matrix composed of image pixels in a row by row manner with a Linearlization or OptimalPLR compression method to obtain a line segment segmentation form; step II: lengthening the line segments under Policy I or shortening the line segments under Policy II by resampling at a upscaling or downscaling factor, to obtain an upscaled or downscaled image in the row direction; and step III: upscaling the data upscaled in the row direction in the step II in a column by column manner through the process in the step II, to obtain an image upscaled in the column direction. The method which is an image scaling technique directly based on PLA for data compression, not only can compress static image data, but also can compress image data of dynamic data streams.

Abstract: An aspect of the present invention provides a method for matching data records held by a plurality of data custodians that relate to a particular entity. One such method comprises the steps of receiving a plurality of clusters of data records from each of the plurality of data custodians (310), comparing related data records received from each of the data custodians (320) and determining whether the related data records relate to the entity based on the result of the comparison (330). The data records in each cluster are representative of a data record held by a respective data custodian. Other aspects of the present invention provide systems and computer program products that embody the methods of the present invention.