written 8.1 years ago by | • modified 8.1 years ago |
Mumbai University > Electronics and telecommunication > Sem 7 > image and video processing
Marks: 05
Years: MAY 2016
written 8.1 years ago by | • modified 8.1 years ago |
Mumbai University > Electronics and telecommunication > Sem 7 > image and video processing
Marks: 05
Years: MAY 2016
written 8.1 years ago by |
The various Edge detection masks are:-
I. Roberts Mask
II. Prewitts Mask
III. Sobel Mask
I. Roberts Mask
i. Following is the Roberts Mask
|∇F|=|Z5–Z9|+|Z6–Z8|
The values of the Roberts Mask are:
and
The values of the two Roberts Mask are:
II. Prewitts Mask
∇F= x- gradient + y-gradient
i.e.∇F=|(Z7+Z8+Z9)–(Z1+Z2+Z3)|+|(Z3+Z6+Z9)–(Z1+Z4+Z7)|
Thus from this equation we get the Prewitts mask as:
III. Sobels Mask
∇ F = x- gradient + y-gradient
i.e. ∇F=|(Z7+2Z8+Z9)–(Z1+2Z2+Z3)|+|(Z3+2Z6+Z9)–(Z1+2Z4+Z7)|
From this equation, the sobels mask is as follows