opencv_image_process_snippets.txt

/*二値化
Mat img2;
threshold(gray_img, img2, 0, 255, CV_THRESH_BINARY | CV_THRESH_OTSU );

*/

/*輪郭抽出
	vector< vector<cv::Point> > contours;
	cv::findContours(img2, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);

	// 抽出した輪郭を描画
	cv::Mat contourImage(img2.size(), CV_8U, cv::Scalar(255));
	const int drawAllContours = -1;
	cv::drawContours(contourImage, contours, drawAllContours, cv::Scalar(0));
	// 画像の表示
	cv::imshow("Contour Image", contourImage);*/
/*
	Mat im_sobel, im_laplacian, im_canny, im_tmp;
	Sobel(gray_img, im_tmp, CV_32F, 1, 1);
	convertScaleAbs(im_tmp, im_sobel, 1, 0);
	Laplacian(gray_img, im_tmp, CV_32F, 3);
	convertScaleAbs(im_tmp, im_laplacian, 1, 0);
	Canny(gray_img, im_canny, 50, 200);
	imshow("Grayscale", gray_img);
	imshow("Sobel", im_sobel);
	imshow("Laplacian", im_laplacian);
	imshow("Canny", im_canny);*/
	
/*　拡大・縮小
	Mat er;
	erode(adptImg, er, Mat(), Point(-1, -1), 1, BORDER_CONSTANT, morphologyDefaultBorderValue());
	imshow("eroded", er);
	Mat dil;
	dilate(adptImg, dil, Mat(), Point(-1, -1), 1, 0, morphologyDefaultBorderValue());
	imshow("dilated", dil);*/