SYSTEM FOR PROCESSING A SERIES OF IMAGE HAVING MUCH NOISE AND MEDICAL EXAMINATION INSTRUMENT INCLUDING SUCH SYSTEM

摘要

PROBLEM TO BE SOLVED: To improve noise of a series of images that represent a very small object such as catheter or optical fiber by including an recursive temporal filtering means, a two-dimensional spatial filtering means and a means which applies a scalar function to a movement probability scale. SOLUTION: An iterative temporal filtering means is formed among a sample to which a previous sequence image that is already filtered corresponds, an image having much noise and the previous filtered image and includes an adding means that forms a sum with a sample to which a difference image weighted with an iterative coefficient Kt corresponds. A two-dimensional space filter F2 D reinforces a spatially coherent sample and offers a motion probability scale βt that is linked to the spatially coherent sample. A calculating means 24 applies a scalar function f1 to the scale βt to generate the coefficient Kt that depends on the scale βt .