초록 ▼

The invention relates to a process for the registration of two different images of the same object consisting of breaking down each of the images into space components representing the distribution of the grey levels of the image, applying a phase registration method to the components to bring about

The invention relates to a process for the registration of two different images of the same object consisting of breaking down each of the images into space components representing the distribution of the grey levels of the image, applying a phase registration method to the components to bring about a correspondence between the components of one image with those of the other image, summating all the results of the bringing into correspondence and detecting, in the image resulting from said sum, the maximum grey level defining the transformation between the two initial images.

대표청구항 ▼

1. A process for the determination of a geometrical transformation between two different images I1 and I2, each constituted by image pixels and representative of the same object, with a view to a superimposing of said two images, comprising the following steps:E13) segmenting each of the images into

1. A process for the determination of a geometrical transformation between two different images I1 and I2, each constituted by image pixels and representative of the same object, with a view to a superimposing of said two images, comprising the following steps:E13) segmenting each of the images into different components and deducing therefrom for each image, a group of thresholded images, E16) registering the thresholded images by a phase-based bringing into correspondence of each image: 16a) by taking, in a group of thresholded images corresponding to the image I1 and in a group of thresholded images corresponding to the image I2, respectively, first and second thresholded image components constituting a first and a second component of a pair of components, 16b) carrying out a transform T for passing each component of the pair of a space range to a dual frequency range, 16c) calculating a phase image for each component of the pair, 16d) calculating, for each pair, a difference between two phase images of the two components of the pair and deducing therefrom a phase difference image, 16e) determining an inverse transform T-1 of the transform T of said phase difference image for determining an offset image and 16f) performing the stages 16a to 16e for each pair of components, E18) summating all the offset images obtained in 16e for determining a total offset image and E20) determining, in each total offset image, a pixel having a maximum value, coordinates of said pixel fixing parameters of the geometrical transformation between the two images I1 and I2.