QQ:609162385
https://blog.csdn.net/cqltbe131421
直接上代码:
Mat MainWindow::applyLookUp(const cv::Mat& image, const cv::Mat& lookup) {
Mat result;
cv::LUT(image, lookup, result);
return result;
}
void MainWindow::LutFunc(Mat &I)
{
Mat lut(1, 256, CV_8U);
for (int i = 0; i < 256; i++) {
lut.at<uchar>(i) = 255 - i;
}
I = applyLookUp(I, lut);
}
void MainWindow::AtFunc(Mat &I)
{
for (int i = 0; i < I.rows; ++i)
for (int j = 0; j < I.cols; ++j)
I.at<uchar>(i, j) = 255 - I.at<uchar>(i, j);
}
void MainWindow::PtrFunc(Mat &I)
{
for (int i = 0; i < I.rows; ++i)
{
uchar *p = I.ptr<uchar>(i);
for (int j = 0; j < I.cols; ++j)
{
p[j] = 255 - p[j];
}
}
}
void MainWindow::IteratorFunc(Mat &I)
{
MatIterator_<uchar> it, end;
for (it = I.begin<uchar>(), end = I.end<uchar>(); it != end; ++it)
*it = 255 - *it;
}