1. A method of processing images in images comprising curvilinear structures, the method comprising the following parallel steps: a step of filtering said images; a decision step intended to select the pixels of the image pertaining to an interesting curvilinear structure, said method being characterized in that the decision step comprises, in parallel, a sub-step of estimating the direction of each image pixel as well as a sub-step of analyzing the connectivity of neighboring pixels based on their directions at the end of the sub-step of estimating the direction of each image pixel, and a sub-step of selecting groups of pixels as a function of the result of said sub-step of analyzing the connectivity of neighboring pixels based on their directions, at the end of said step of filtering.