Exercise $7$: Display the results of the edge$-$detection filtering:

a$)$ Display the edge$-$detection filtered image $($Sobel filter$)$ processed in the spatial domain.

b$)$ Display the edge$-$detection filtered image $($Sobel filter$)$ processed in the frequency domain.$\%$ create the spacial filtered image

h$1=$ fspecial$(\text{'}$sobel$\text{'})$;

spacial$\_$filtered $=$ imfilter$($double$($cman$),$ h$1,0,$ 'conv'$)$;

figure$(1)$; imshow$($abs$($spacial$\_$filtered$),[])$

$\%\%$

PQ $=$ size$($cman$)$;

CMAN $=$ fft$2($double$($cman$))$;

H$1=$ fft$2($double$($h$1),$PQ$(1),$ PQ$(2))$;

F$\_$CMAN $=$ H$1.*$CMAN;

ffi $=$ ifft$2($F$\_$CMAN$)$;

figure$(2)$; imshow$($abs$($ffi$),[])$

Results:

After loading the 'cameraman.tif', display the results of the average filtering:

a$)$ Display the average filtered image $(\text{'}$average$\text{'}$ filter with size$=5)$ processed in the spatial domain.

b$)$ Display the average filtered image $(\text{'}$average$\text{'}$ filter with size$=5)$ processed in the frequency domain.

Code for Results A and B