Weakened bones radiographically TO IMAGES

摘要

1. A system (100) for selecting an object (Ob) of the original image, said object circuit described (C), wherein the system (100) comprises: - a gradient block (100) for computing the gradient field of the original image on the basis of the original image, - smoothing unit (120) for smoothing the gradient field of the original image, u integrating unit (130) for calculating the image of the object by integrating the smoothed gradient field of the original image and thus select an object (Ob) of the original image, wherein ayasya in that at each point of the original image, smoothing is given two-dimensional kernel convolution, which is the product of the first one-dimensional convolution kernel in a first direction substantially parallel to the contour (C) at the point on the contour, wherein, a point corresponds to the intersection contour normal to a contour extending through the corresponding point of the original image and is closest to the corresponding point of the original image and a second one-dimensional convolution kernel in a second direction substantially normal to the contour (C) to mention th point on konture.2. The system (100) according to claim 1, further comprising a coordinate unit (105) for: - parameterisation circuit (C), u converting the rectangular coordinates (x, y) in the original image to coordinates (s, n) on the basis of the contour, wherein s (x, y) represents the value of the parameter points on the parameterized circuit (C), corresponding to the intersection of the normals to the contour (C), extending through the point (x, y), where n (x, y) represents the signed distance between a point (x , y) in the original image and the contour (C), and, thus, the distance from the mark takes the same sign for points