Abstract: A circuit arrangement includes a preprocessing circuit configured to obtain context information related to a user location, a learning circuit configured to determine a predicted user movement based on context information related to a user location to obtain a predicted route and to determine predicted radio conditions along the predicted route, and a decision circuit configured to, based on the predicted radio conditions, identify one or more first areas expected to have a first type of radio conditions and one or more second areas expected to have a second type of radio conditions different from the first type of radio conditions and to control radio activity while traveling on the predicted route according to the one or more first areas and the one or more second areas.

Abstract: A method for detecting an image edge within a dithered image. A pixel within a support region is selected for processing. The differences between pixel values in the region and the selected pixel are computed to form a current difference map. Whether the selected pixel in the region differ by no more than one resolution level from any other pixel of the region is determined from the current difference map. An edge is determined not to exist within the region if the difference map for a region contains no values differing by more than one resolution level. An edge is determined to exist within a region if the difference map for the selected pixel and region contain values differing by more than one resolution level. Alternatively, a difference map for the selected region of support is determined and compared to a table of all possible valid difference maps. If a corresponding difference map is found within the table then an edge does not exist within the presently processed region of support.

Abstract: A method for inverse dithering a dithered image using a filter selected from a set of filters arranged in a preselected order is disclosed. Upon receipt of a selected portion of a dithered image, the selected portion is up-multiplied from a first amplitude resolution to a second amplitude resolution. The up-multiplied dithered image at the second amplitude resolution is then filtered by the selected filter coefficients to generate the inverse dithered image.

Abstract: A method for selecting a filter from among a plurality of ordered filters within an inverse dithering system is disclosed. In response to receipt of a number of filter parameters associated with the plurality of ordered filters and a selected portion of a dithered image, a determination is made of the region of support for the plurality of filters from the filter parameters. From these regions of support, a lowest ordered filter having a region of support that excludes an image edge in the selected portion of the dithered image is selected.

Abstract: A method of reconstructing an image from a dithered image. A predefined set of filters having different regions of support is established. Each filter is defined by a number of filter coefficients and an impulse response function which defines the filter response for a region of support outside of which the impulse response is zero. Filters are organized according to indexes and this organization represents the order in which the filters are considered during a filter selection process. The filter selection process selects a filter constrained by the rule that the filter selected must only perform low-pass filtering on a region of support that does not contain edges of an image. Due to the organization of the filter set, the filter selection process first selects the largest filter from the filter set that fits within the region about the current processed pixel. If there is an edge of an image within the support region of the first selected filter, the next smaller filter is selected.

Abstract: A method and apparatus for inverse dithering a dithered image is disclosed. The system includes a plurality of digital filters which are organized according to a preselected order. A selection module enables the selection of one filter from the plurality of filters according to the preselected order to filter a presently selected portion of the dithered image. The selected portion of the dithered image is then processed based upon the selected filter to generate a portion of the inverse dithered image.