OSXでOpenCVのテスト

capture.cpp

#include <cstdlib>
#include <opencv2/opencv.hpp>

int main(int argc, char* argv[]) {
  cv::VideoCapture cap(0);
  if (!cap.isOpened()) {
    std::cerr << "Cannot open camera device." << std::endl;
    exit(1);
  }

  const char* wCapture = "Capture";
  cv::namedWindow(wCapture, cv::WINDOW_AUTOSIZE);

  int ksizeMinus1 = 12;
  cv::createTrackbar("ksize-1", wCapture, &ksizeMinus1, 30);

  cv::Mat frame;
  cap >> frame;

  int width = frame.cols;
  int height = frame.rows;
  cv::Rect r(cv::Point(width / 4, height / 4), cv::Point(3 * width / 4, 3 * height / 4));

  while (1) {
    cap >> frame;

    int ksize = ksizeMinus1 + 1;
    cv::Mat target = frame(r);
    cv::blur(target, target, cv::Size(ksize, ksize));

    cv::imshow(wCapture, frame);

    if (cv::waitKey(30) == 0x1B) {
      break;
    }
  }

  cv::destroyAllWindows();

  return 0;
}

Makefile

CXX=clang++
CXXFLAGS=-Wall
LDLIBS=-lopencv_core -lopencv_highgui -lopencv_imgproc

capture: capture.cpp
	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDLIBS)