Median filter and mean filter C + + code

mean filter and median filter code

2008-11-24 16:07:36| Category: Programming | Report | Font size Subscription

------------------mean-value filter

BOOL Filterav (unsigned char *image,int height,int width)

{

int i,j;

unsigned char *p= (unsigned char*) malloc (height*width);

for (i=1;i

{

for (j=1;j<width-1;j++)

{

p[i*width+j]= (unsigned char) (((int) image[(i-1) *width+j-1]

+ (int) image[(i-1) *width+j]

+ (int) image[(i-1) *width+j+1]

+ (int) image[i*width+j-1]

+ (int) image[i*width+j]

+ (int) image[i*width+j+1]

+ (int) image[(i+1) *width+j-1]

+ (int) image[(i+1) *width+j]

+ (int) image[(i+1) *width+j+1])/9);

}

}

for (i=1;i

{

for (j=1;j<width-1;j++)

{

IMAGE[I*WIDTH+J]=P[I*WIDTH+J];

}

}

Free (p);

return true;

}

----------------------------Median Filter

BOOL Filtermid (unsigned char *image,int height,int width)

{

int i,j,k,l;

int POS;

unsigned char temp;

unsigned char psr[9];

unsigned char *p= (unsigned char*) malloc (height*width);

for (i=1;i

{

for (j=1;j<width-1;j++)

{//---3*3 window matrix

psr[0]=image[(i-1) *width+j-1];

psr[1]=image[(i-1) *width+j];

psr[2]=image[(i-1) *width+j+1];

PSR[3]=IMAGE[I*WIDTH+J-1];

PSR[4]=IMAGE[I*WIDTH+J];

PSR[5]=IMAGE[I*WIDTH+J+1];

psr[6]=image[(i+1) *width+j-1];

psr[7]=image[(i+1) *width+j];

psr[8]=image[(i+1) *width+j+1];

--------Select Sort

for (k=0;k<9;k++)

{

Pos=k;

for (l=k;l<9;l++)

{

if (Psr[l]<psr[pos])

Pos=l;

}

TEMP=PSR[K];

Psr[k]=psr[pos];

Psr[pos]=temp;

}

------Take the median value

P[I*WIDTH+J]=PSR[4];

}

}

for (i=1;i

{

for (j=1;j<width-1;j++)

{

IMAGE[I*WIDTH+J]=P[I*WIDTH+J];

}

}

Free (p);

return true;

}

Median filter and mean filter C + + code