Patent ID: 6341179
Filing Date: 2002-01-22
Classification: G06T

Abstract:
A method for generating a corrected image of an object by:(i) employing scanning means (12) to scan an object and derive an image data set from signals received from the object, and (i) manipulating the data set to reduce unwanted artefact effects associated with the object and produce corrected image data to yield an artefact-reduced image, characterised in that manipulating the data set incorporates the steps of: a) providing a focus criterion for the image data set prior to correction, b) generating a trial artefact corresponding to a possible artefact cause, c) producing a manipulated version of the image data set in which the trial artefact is counteracted and providing a focus criterion for this version, d) varying the trial artefact and repeating the preceding step iteratively to produce a manipulated version of the image data set compensated for a version of the trial artefact associated with optimisation of the focus criterion to the extent obtainable by iteration, and e) producing corrected image data from a manipulated version of the image data set associated with optimisation of the focus criterion.