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include < stdio . h >
include < math . h >
include < time . h >
void applyGaussianBlur ( float src [ 5 ] [ 5 ] , float dst [ 5 ] [ 5 ] , int h , int w , float kernel [ 3 ] [ 3 ] ) {
for ( int i = 1 ; i < h - 1 ; i + + ) {
for ( int j = 1 ; j < w - 1 ; j + + ) {
dst [ i ] [ j ] = 0 ;
for ( int ki = - 1 ; ki < = 1 ; ki + + ) {
for ( int kj = - 1 ; kj < = 1 ; kj + + ) {
dst [ i ] [ j ] + = src [ i + ki ] [ j + kj ] * kernel [ 1 + ki ] [ 1 + kj ] ;
}
}
}
}
}
int main ( ) {
float src [ 5 ] [ 5 ] = {
{ 0 , 0 , 0 , 0 , 0 } ,
{ 0 , 1 , 2 , 3 , 0 } ,
{ 0 , 4 , 5 , 6 , 0 } ,
{ 0 , 7 , 8 , 9 , 0 } ,
{ 0 , 0 , 0 , 0 , 0 }
} ;
float dst [ 5 ] [ 5 ] = { 0 } ;
float kernel [ 3 ] [ 3 ] = {
{ 1.0 / 16 , 2.0 / 16 , 1.0 / 16 } ,
{ 2.0 / 16 , 4.0 / 16 , 2.0 / 16 } ,
{ 1.0 / 16 , 2.0 / 16 , 1.0 / 16 }
} ;
clock_t start = clock ( ) ;
applyGaussianBlur ( src , dst , 5 , 5 , kernel ) ;
clock_t end = clock ( ) ;
printf ( " 结果： \n " ) ;
for ( int i = 0 ; i < 5 ; i + + ) {
for ( int j = 0 ; j < 5 ; j + + ) {
printf ( " %.2f " , dst [ i ] [ j ] ) ;
}
printf ( " \n " ) ;
}
printf ( " 步骤1运行time： \n " , ( double ) ( end - start ) / CLOCKS_PER_SEC ) ;
return 0 ;
}
