| 摘要 |
- From the image of an object represented by a finite number of intensity levels, the image having been reconstructed from projections acquired from different angles around the object, the invention involves determining, for at least one angle, a distribution representative of the spread of the intensity levels in the image in a predetermined direction. Next, at least one intensity threshold is determined by minimising an objective function estimating the difference between the actual measurement and a simulated measurement for the angle in question, the simulated measurement being a function of the threshold and of the distribution. Then the image is segmented by grouping together the intensity levels into at least two classes delimited by said threshold. - Applicable, in particular, to the characterisation of catalyst supports for petrochemical refining. |
