void rotate(cv::Mat& src, double angle, cv::Mat& dst){
//cout << RANDCOL << "R O T A T I N G" << endlr;
//int len = std::max(src.cols, src.rows);
cv::Point2f ptCp(src.cols*0.5, src.rows*0.5);
//cv::Point2f pt(len/2., len/2.);
cv::Mat M = cv::getRotationMatrix2D(ptCp, angle, 1.0);
cv::warpAffine(src, dst, M, src.size(), cv::INTER_CUBIC); //Nearest is too rough,
}
Mat Normalized::SkewDetectionUsesCentreOfMass(int upper, int lower)
{
cout << "upper = " << upper << endl;
cout << "lower = " << lower << endl;
cv::Rect crop(0, upper, this->word.cols, lower - upper);
Mat word_removed_baseline = this->word(crop).clone();
//Mat word_removed_baseline = this->word.clone();
//imwrite("D:/word_removed_baseline.jpg", word_removed_baseline);
int x_CoM_left, x_CoM_right;
int y_CoM_left, y_CoM_right;
cv::line(word_removed_baseline, cv::Point(word_removed_baseline.cols / 2, 0), cv::Point(word_removed_baseline.cols / 2, word_removed_baseline.rows), Scalar(128, 128, 128));
x_CoM_left = this->xCentroid(word_removed_baseline, 0, 0, word_removed_baseline.cols / 2, word_removed_baseline.rows);
x_CoM_right = this->xCentroid(word_removed_baseline, word_removed_baseline.cols / 2, 0, word_removed_baseline.cols, word_removed_baseline.rows) + word_removed_baseline.cols / 2;
y_CoM_left = this->yCentroid(word_removed_baseline, 0, word_removed_baseline.cols / 2, word_removed_baseline.rows);
y_CoM_right = this->yCentroid(word_removed_baseline, word_removed_baseline.cols / 2, word_removed_baseline.cols, word_removed_baseline.rows);
float slope = float(y_CoM_right - y_CoM_left) / (x_CoM_right - x_CoM_left);
cv::line(word_removed_baseline, cv::Point(x_CoM_left, y_CoM_left), cv::Point(x_CoM_right, y_CoM_right), Scalar(128, 128, 128));
//float slope = -10;
float theta = atan(slope) * 180 / M_PI;
//cout << "left (x, y) = (" << x_CoM_left << ", "<< y_CoM_left << ")"<< endl;
//cout << "right (x, y) = (" << x_CoM_right << ", " << y_CoM_right << ")" << endl;
//cout << "slope = " << slope << endl;
cout << "theta = " << theta << endl;
if (theta <= 15) {
cv::Point2f ptCp(0, 0);
cv::Mat M = cv::getRotationMatrix2D(ptCp, theta, 1);
cv::warpAffine(word, word, M, word.size(), INTER_LINEAR, cv::BORDER_CONSTANT, cv::Scalar(255, 255, 255)); //Nearest is too rough,
}
else {
cout << "Nghieng qua khong lam gi ca" << endl;
}
//imshow("Rotate", word);
//imwrite("D:/Rotate.jpg", word);
return word_removed_baseline;
}