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66 lines
1.4 KiB
C++

#include <stdio.h>
#include <opencv2/opencv.hpp>
using namespace cv;
void
Sharpen (const Mat & myImage, Mat & Result)
{
CV_Assert (myImage.depth () == CV_8U); // accept only uchar images
Result.create (myImage.size (), myImage.type ());
const int nChannels = myImage.channels ();
for (int j = 1; j < myImage.rows - 1; ++j)
{
const uchar *previous = myImage.ptr < uchar > (j - 1);
const uchar *current = myImage.ptr < uchar > (j);
const uchar *next = myImage.ptr < uchar > (j + 1);
uchar *output = Result.ptr < uchar > (j);
for (int i = nChannels; i < nChannels * (myImage.cols - 1); ++i)
{
*output++ = saturate_cast < uchar > (5 * current[i]
- current[i - nChannels] -
current[i + nChannels] -
previous[i] - next[i]);
}
}
Result.row (0).setTo (Scalar (0));
Result.row (Result.rows - 1).setTo (Scalar (0));
Result.col (0).setTo (Scalar (0));
Result.col (Result.cols - 1).setTo (Scalar (0));
}
int
main (int argc, char **argv)
{
if (argc != 2)
{
printf ("Usage: SharpenImage image.jpg\n");
return -1;
}
Mat image;
image = imread (argv[1], 1);
if (argc != 2 || !image.data)
{
printf ("No image data\n");
return -1;
}
Mat result;
Sharpen (image, result);
namedWindow ("Sharpen Image", CV_WINDOW_AUTOSIZE);
// imshow("Sharpen Image", image);
imshow ("Sharpen Image", result);
waitKey (0);
return 0;
}