OpenCV 计算机视觉掩膜操作
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using namespace cv;
int main(int argc, char** argv)
Mat src, dst;
src = imread("D:/OpenCVtest/image/hao.jpg");
if (!src.data)
printf("could not load image...\\n");
return -1;
namedWindow("input image", CV_WINDOW_AUTOSIZE);
imshow("input image", src);
Mat src, dst;
src = imread("D:/OpenCVtest/image/hao.jpg");
if (!src.data)
printf("could not load image...\\n");
return -1;
namedWindow("input image", CV_WINDOW_AUTOSIZE);
imshow("input image", src);
/*
int cols = (src.cols-1) * src.channels();
int offsetx = src.channels();
int rows = src.rows;
int cols = (src.cols-1) * src.channels();
int offsetx = src.channels();
int rows = src.rows;
dst = Mat::zeros(src.size(), src.type());
for (int row = 1; row < (rows - 1); row++)
const uchar* previous = src.ptr<uchar>(row - 1);
const uchar* current = src.ptr<uchar>(row);
const uchar* next = src.ptr<uchar>(row + 1);
uchar* output = dst.ptr<uchar>(row);
for (int col = offsetx; col < cols; col++)
output[col] = saturate_cast<uchar>(5 * current[col] - (current[col- offsetx] + current[col+ offsetx] + previous[col] + next[col]));
*/
double t = getTickCount();
Mat kernel = (Mat_<char>(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
filter2D(src, dst, src.depth(), kernel);
double timeconsume = (getTickCount() - t) / getTickFrequency();
printf("tim consume %.2f\\n", timeconsume);
for (int row = 1; row < (rows - 1); row++)
const uchar* previous = src.ptr<uchar>(row - 1);
const uchar* current = src.ptr<uchar>(row);
const uchar* next = src.ptr<uchar>(row + 1);
uchar* output = dst.ptr<uchar>(row);
for (int col = offsetx; col < cols; col++)
output[col] = saturate_cast<uchar>(5 * current[col] - (current[col- offsetx] + current[col+ offsetx] + previous[col] + next[col]));
*/
double t = getTickCount();
Mat kernel = (Mat_<char>(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
filter2D(src, dst, src.depth(), kernel);
double timeconsume = (getTickCount() - t) / getTickFrequency();
printf("tim consume %.2f\\n", timeconsume);
namedWindow("contrast image demo", CV_WINDOW_AUTOSIZE);
imshow("contrast image demo", dst);
imshow("contrast image demo", dst);
waitKey(0);
return 0;
return 0;
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