Because the pixel vectors connecting with each other are the priority, these uncovered pixel vectors usually have the judgment upon the distance difference with the connected regions conducted to carry out region growing. It is the major reason why CSF is covered by GM and eroded. Therefore, it is necessary to modify the pixel vector, simultaneously calculate the distance difference with all the regions, and grow it into one of the regions with the minimum difference. The minimum distances were found out from the distances between the pixel vectors and all the regions, each corresponding region with the.
