參考資訊:
https://docs.opencv.org/master/d7/d9f/tutorial_linux_install.html
main.cpp
#include <opencv2/core/utility.hpp> #include <opencv2/imgproc.hpp> #include <opencv2/imgcodecs.hpp> #include <opencv2/highgui.hpp> #include <iostream> using namespace cv; using namespace std; int threshval = 100; static void on_trackbar(int, void *) { char buf[255] = {0}; sprintf(buf, "%d", threshval); Mat img(250, 250, CV_8UC3, Scalar(128, 255, 255)); putText(img, buf, Point(80, 100), FONT_HERSHEY_SIMPLEX, 1, (0, 0, 0), 1, LINE_AA); imshow("trackbar", img); } int main(int argc, const char **argv) { namedWindow("trackbar", WINDOW_AUTOSIZE); createTrackbar("Threshold", "trackbar", &threshval, 255, on_trackbar); on_trackbar(threshval, 0); waitKey(0); return 0; }
CMakeLists.txt
cmake_minimum_required(VERSION 2.8) project(main) find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) add_executable(main main.cpp) target_link_libraries(main ${OpenCV_LIBS})
編譯並且執行
$ cmake . $ make $ ./main
完成