Fig 7. The extraction process of contours of apples with different sizes.
(a) The large apple (b) HSV transform of the large apple (c) Contour extraction of the large apple (d) The medium apple (e) HSV transform of the medium apple (f) Contour extraction of the medium apple (g) The small apple (h) HSV transform of the small apple (i) Contour extraction of the small apple.