Organ object contour location method for computer tomography images

摘要

The contour location method uses brightness normalisation of each original image (OI) using the extreme values of the grey value distribution, before subjecting each image point of the normalised image (NI) to a number fuzzy-edge-detection procedures (FEDH, FEDV,FED1,FED2) for locating the horizontal edges, the vertical edges and the diagonal edges respectively. The image point output values provided by the fuzzy logic devices are fed to a mean value stage (M), providing a mean value (CM) compared with a threshold to provide a contour point (C).