Patent ID: 8515158

Claim:
A method for deriving a representation of an image by processing signals corresponding to the image, the method comprising: processing the image to obtain a three dimensional representation of the image by tracing lines across the image, each line across the image being defined by a first, distance, parameter (d) and a second, angle, parameter (θ), wherein a position on each line is defined by a third, position, parameter (t); and deriving a three dimensional representation of the image represented by said first, second, and third parameters (d, θ, t) and the corresponding pixel value; and using the three dimensional representation of the image to derive the representation of the image, by extracting values of the three dimensional representation for a predetermined value of the first, distance, parameter, and applying a functional along one or more lines of the extracted values of the three dimensional representation, each line extending along values of the second, angle, parameter at a corresponding, variable, value of the third, position, parameter (t), to obtain a one-dimensional function in terms of the third, position, parameter (t).