Abstract: A processing element for a neural network comprises a plurality of adder units configurable into a one of a plurality of different tree configurations, each adder unit having two variable inputs and at least one control input determining a respective operation to be performed by the adder unit. The operation comprises one of: a sum or a comparison of the variable inputs. In at least one of the configurations, a first sub-set of the plurality of adder units are provided in a first layer of a tree for receiving the variable inputs and for performing a selected operation on the inputs, the units being configurable to provide outputs to a second sub-set of adder units of the tree, with a final sub-set of adder units providing at least one output for the configuration of adder tree.

Abstract: A method for correcting a distorted input image includes determining a local region of an image to be displayed and dividing the region into an array of rectangular tiles, each tile corresponding to a distorted tile with a non-rectangular boundary within the input image. For each tile of the local region, maximum and minimum memory address locations of successive rows of the input image sufficient to span the boundary of the distorted tile are determined. Successive rows of the distorted input from between the maximum and minimum addresses are read. Distortion of the non-rectangular portion of the distorted input image is corrected to provide a tile of a corrected output image which is stored.

Abstract: A method for correcting a distorted input image includes determining a local region of an image to be displayed and dividing the region into an array of rectangular tiles, each tile corresponding to a distorted tile with a non-rectangular boundary within the input image. For each tile of the local region, maximum and minimum memory address locations of successive rows of the input image sufficient to span the boundary of the distorted tile are determined. Successive rows of the distorted input from between the maximum and minimum addresses are read. Distortion of the non-rectangular portion of the distorted input image is corrected to provide a tile of a corrected output image which is stored.