EdgeBoard采集图片

基于opencv可以通过EdgeBoard采集图片

#include <fstream>

#include <iostream>

#include <opencv2/highgui.hpp>

#include <opencv2/opencv.hpp>

using namespace std;

using namespace cv;

int main(int argc, char *argv[]) {

 

  std::string writePath = "/root/workspace/SmartCarToolKits/c++/temp";//这里是绝对路径

  /*注意：

    使用 0 和 /dev/video0 的分辨率不同：

      0           : opencv 内部的采集，可能是基于 V4L2, 分辨率：1280 * 960

      /dev/video0 : 基于Gstreamer ， 分辨率：640 * 480

  */

  VideoCapture capture(0);

  capture.open(0, cv::CAP_V4L);

  if (!capture.isOpened()) {

    std::cout << "can not open video device "  << std::endl;

    return 1;

  }

  capture.set(cv::CAP_PROP_FOURCC, CV_FOURCC('M', 'J', 'P', 'G'));

  capture.set(cv::CAP_PROP_FPS, 60);

  capture.set(cv::CAP_PROP_FRAME_WIDTH, 640);

  capture.set(cv::CAP_PROP_FRAME_HEIGHT, 480);

  double rate = capture.get(CAP_PROP_FPS);

  double width = capture.get(CAP_PROP_FRAME_WIDTH);

  double height = capture.get(CAP_PROP_FRAME_HEIGHT);

  std::cout << "Camera Param: frame rate = " << rate << " width = " << width

            << " height = " << height << std::endl;

  std::string window_name = "usbcamera";

  namedWindow(window_name, WINDOW_NORMAL);

  std::string name;

  int i=0;

  int width_ = 640;

  int height_ = 480;

  //Mat frame;

  while (1) {

    //if (!capture.read(frame)) {

      //std::cout << "no video frame" << std::endl;

      //continue;

    //}

    Mat frame;

    capture >> frame;

    if (32 == waitKey(20)) {      //空格拍照

      name = writePath + to_string(i)+".jpg";

      imwrite(name, frame);

      cout << name << endl;

      i++;

    }

    if (97 == waitKey(10)) {      //'a'退出

      break;

    }

    imshow(window_name, frame);

    //waitKey(1);

  }

  //capture.release();

}