regionprops:
對labeled的matrix取屬性 STATS = regionprops(L,properties)
area:ROI的面積
Centroid：質心
BoundingBox:包含ROI的最小矩形。返回值：[ul_corner width] ,ul_corner是upper left corner的座標，width是矩形的長寬等（多維類推）
'MajorAxisLength'-- Scalar; the length (in pixels) of the major axis of the ellipse that has the same normalized second central moments as the region. This property is supported only for 2-D input label matrices.
長軸的長度，不過這個橢圓是怎麼來的，不懂
'MinorAxisLength' -- Scalar; the length (in pixels) of the minor axis of the ellipse that has the same normalized second central moments as the region. This property is supported only for 2-D input label matrices.
短軸的長度
Eccentricity：橢圓的 離心率，偏心率
Orientation：x軸和橢圓長軸的夾角
BinaryImage:轉爲二值圖像
FilledImage: BinaryImage填補空心的部分
FilledArea: FilledImage的面積