METHOD FOR IMPROVING ABILITY TO RECOGNISE MATERIALS IN X-RAY INSPECTION SYSTEM, AND X-RAY INSPECTION SYSTEM

摘要

FIELD: physics.;SUBSTANCE: method includes steps of recording at least two absorption X-ray images of an object to be inspected at different energies, mathematically modelling the object by a number of layers assuming a particular material for each layer, wherein an absorption coefficient describes the absorption capacity of a layer, the number of layers is less than or equal to the number of X-ray images and at least one layer is assumed to be a material to be recognised during the inspection, decomposing the absorption coefficient of each layer into a path-dependent factor and an energy-dependent factor, calculating the path-dependent factors for all layers from the absorption X-ray images using the absorption equation, calculating at least one synthetic image from the sum of all layers of the product of the absorption coefficients and the weighting factors and evaluating the synthetic image.;EFFECT: improved ability to recognise material using an X-ray inspection system.;7 cl, 6 dwg