A method for obtaining a probability in a 3D probability map, includes: obtaining at least one value of at least one parameter for each stop of a 3D moving window, wherein a first, second, third and fourth of the stops are partially overlapped, the first and second stops are shifted from each other by a distance equal to a first dimension of a computation voxel, the first and third stops are shifted from each other by a distance equal to a second dimension of the computation voxel, and the first and fourth stops are shifted from each other by a distance equal to a third dimension of the computation voxel；；； matching the at least one value to a classifier to obtain a first probability for each stop of the 3D moving window；；and calculating a second probability for the computation voxel based on information associated with the first probabilities for the first through fourth stops.一種獲取三維機率圖中機率的方法，包括：為三維移動窗口的每個停止點獲取至少一個參數的至少一個數值，其中第一、第二、第三和第四個停止點部分重疊，第一和第二停止點彼此偏移，其偏移等於一計算體素的一第一尺寸的距離，第一和第三停止點彼此偏移，其偏移等於計算體素的一第二尺寸的距離，並且第一和第四停止點彼此偏移，其偏移等於計算體素的一第三尺寸的距離；將所述至少一個數值與分類器匹配，以獲得3D移動窗口的每個停止點的第一機率；並且依據與第一到第四停止點的第一機率相關聯的訊息，以計算出計算體素的第二機率。
