Hi, i need to sharp an image. Trying to use Lapacian filter but get the same figure as output. Can t find the error in the code
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <math.h>
using namespace cv;
using namespace std;
float laplacian(Mat image,int x,int y)
{
float sum=0;
float value=0;
for(int j = x-1; j <= x+ 1; j++)
{
uchar* data = image.ptr<uchar>(j);
for(int i = y-1; i <= y+1; i++)
{
if (j==x && i==y)
{
value=data[i]*(-8);
}
else value=data[i];
sum=sum+value;
}
}
return sum;
}
Mat paddImage(Mat image,int size,int borderType)
{
Mat padded;
int top, bottom, left, right;
Scalar value;
top = size; bottom = size;
left = size; right = size;
copyMakeBorder( image, padded, top, bottom, left, right, borderType);
return padded;
}
int main( int argc, char** argv )
{
if( argc != 2)
{
cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
return -1;
}
Mat blurred;
blurred=imread(argv[1], CV_LOAD_IMAGE_GRAYSCALE );
namedWindow("blurred", CV_WINDOW_AUTOSIZE );
imshow("blurred", blurred );
Mat padded=paddImage(blurred,1,BORDER_CONSTANT);
namedWindow("blurred pad", CV_WINDOW_AUTOSIZE );
imshow("blurred pad", padded );
for(int j = 1; j < padded.rows-1; j++)
{
uchar* data = padded.ptr<uchar>(j);
for(int i = 1; i < padded.cols-1; i++)
{
data[i]=data[i]-((-1/9)*laplacian(padded,j,i))*data[i];
}
}
namedWindow("sharpen", CV_WINDOW_AUTOSIZE );
imshow("sharpen", padded );
waitKey(0);
return 0;
}
