Digital Signal Processing Reference
In-Depth Information
(3) Calculate extended spatial frequency SF of the obtained image edge, and then
calculate the weights of each edge of the image:
SF
w
=
i
i
K
(10)
=
SF
n
n
1
(4) Weighted obtained image edge,finally synthesize the new edge, namely:
K
=
G
=
w
n
g
(11)
n
n
1
Among them, G is the new edge image, K is the number of extracted edge
(
K=M
N
×
, g
n
is the extracted edge with different structural element, w
n
is the
weights for each edge of the weighted synthesis.
3
The Simulation Results
The
comparison results
of
improved multi-structure and multi-faceted morphological
edge detection and the conventional edge detection are shown in Figure 4, the
selected multi-structure elements are square, diamond, and disc-shaped structural
elements scale of 2 , the selected multi-faceted structural elements set are linear
structural elements of 0 °, 45 °, 90 °, 135 ° direction.
(a)
(b) (c)
(d) (e) (f)
Fig. 4.
Comparison of the edge extraction results (a) Input image (b)Prewitt operator results (c)
Log operator results(d) Canny operator results(e)Conventional morphological extracted results
(f)Results of improved morphological method
