Abstract: Methods and neural network accelerator for online selection of number formats for network parameters of a neural network.

Abstract: A mechanism for performing a discrete Fourier-related transform using a hardware accelerator that comprises fixed-function circuitry including convolution hardware configured to perform one or more convolution operations. A matrix multiplication operation used in the discrete Fourier-related transform is performed by the convolution hardware using a convolution operation. A convolution kernel for the convolution operation is derived from a weight matrix representing a multiplicand or multiplier of the matrix multiplication operation.

Abstract: A method and data processing system for implementing a neural network containing at least one matrix multiplication operation. The matrix multiplication operation is mapped to a graph of neural network operations including at least one element-wise operation. The at least one element-wise operation is implemented in fixed-function hardware of a neural network accelerator.

Abstract: Methods for implementing an exponential operation, and a softmax neural network layer, in neural network accelerator hardware, and a data processing system for implementing the exponential operation and a data processing system for implementing the softmax layer. The exponential operation or softmax layer is mapped to a plurality of elementary neural network operations, and the neural network accelerator hardware evaluates these operations, to produce the result of the operation or layer respectively.

Abstract: A method and data processing system implement a neural network containing at least one matrix multiplication operation. The matrix multiplication operation is mapped to a graph of neural network operations including at least one transformation and at least one convolution. The at least one convolution is implemented in fixed-function hardware of a neural network accelerator.

Abstract: The invention provides for a method and related computer program for deconvolving a digital image captured by way of a lens arrangement of an image capture device including, in combination with an expression representative of the optical transfer function of the lens arrangement, the step of retrieving metadata associated with the image capture device at the time of image capture and employing retrieved metadata as at least one parameter within the said expression.