opencv提取水平和垂直线

main.cpp

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#include <istream> #include <opencv2/opencv.hpp>   using namespace cv; using namespace std;     int main(int argc, char **argv) {     Mat src, gray_dst, bin_dst, h_dst, v_dst, dst;     //    加载图片     src = imread("../../picture/chars.png", 1);     if (!src.data) {         printf("No image data \n");         return -1;     }     char src_title[] = "src";     namedWindow(src_title, WINDOW_AUTOSIZE);     imshow(src_title, src);     // 转换成灰度图像     char gray_title[] = "gray";     namedWindow(gray_title, WINDOW_AUTOSIZE);     cvtColor(src, gray_dst, COLOR_BGR2GRAY);     imshow(gray_title, gray_dst);     //转换成二值图像     char bin_title[] = "bin";     namedWindow(bin_title, WINDOW_AUTOSIZE);     adaptiveThreshold(~gray_dst, bin_dst, 255, ADAPTIVE_THRESH_MEAN_C, THRESH_BINARY, 15, -2);     imshow(bin_title, bin_dst);     // 提取水平直线     char h_title[] = "h";     Mat h = getStructuringElement(MORPH_RECT, Size(src.cols / 16, 1), Point(-1, -1));     Mat tmp1;     erode(bin_dst, tmp1, h);     dilate(tmp1, h_dst, h);     // 提取水平直线等价api     // morphologyEx(bin_dst, h_dst, MORPH_OPEN, h);     namedWindow(h_title, WINDOW_AUTOSIZE);     imshow(h_title, h_dst);     // 提取垂直直线     char v_title[] = "v";     Mat v = getStructuringElement(MORPH_RECT, Size(1, src.rows / 16), Point(-1, -1));     Mat tmp2;     erode(bin_dst, tmp2, v);     dilate(tmp2, v_dst, v);     // 提取垂直直线等价api     // morphologyEx(bin_dst, v_dst, MORPH_OPEN, v);     namedWindow(v_title, WINDOW_AUTOSIZE);     imshow(v_title, v_dst);     //  字符提取     char dst_title[] = "dst";     Mat kernel = getStructuringElement(MORPH_RECT, Size(3, 3), Point(-1, -1));     // Mat tmp3;     // erode(bin_dst, tmp3, kernel);     // dilate(tmp3, dst, kernel);     morphologyEx(bin_dst, dst, MORPH_OPEN, kernel);     bitwise_not(dst, dst);     blur(dst, dst, Size(3, 3), Point(-1, -1));     namedWindow(dst_title, WINDOW_AUTOSIZE);     imshow(dst_title, dst);     //    等待按键     waitKey(0);     return 0; }