basics

Author: ajithvcoder

basics/.idea/basics.iml

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+/*
+
+Getting arguments
+-----------------
+
+Instructions to run the code
+-----------------------------
+
+> g++ 1_program.cpp -o app `pkg-config --cflags --libs opencv`
+> ./app water air
+
+*/
+
+#include <opencv2/highgui.hpp>
+#include "opencv2/core/core.hpp"
+
+#include <iostream>
+using namespace std;
+using namespace cv;
+
+int main(int argc,char** argv){
+
+
+
+  printf("argc = %d\n",argc);
+  printf("argv = %s\n",argv[0]);
+  printf("argv = %s\n",argv[1]);
+  printf("argv = %s\n",argv[2]);
+
+  printf("printing in a for loop \n");
+
+  for(int i=0;i<argc;++i){
+
+    printf("%s\n",argv[i]);
+  }
+
+  return 0;
+
+}
+

basics/.idea/misc.xml

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+/*
+
+Reading a image
+----------------
+
+Instructions to run the code
+-----------------------------
+
+> g++ 2_program.cpp -o app `pkg-config --cflags --libs opencv`
+> ./app
+
+*/
+
+
+
+#include <opencv2/highgui.hpp>
+#include "opencv2/core/core.hpp"
+#include <iostream>
+
+
+//name space
+using namespace std;
+using namespace cv;
+
+
+
+int main(int argc,char** argv){
+
+  cv::Mat image;
+  image = cv::imread("sample_two.jpeg",CV_LOAD_IMAGE_COLOR);
+  if(!image.data){
+      std::cout<<"could not open or find image"<<std::endl;
+      return -1;
+  }
+
+
+  cv::namedWindow("Display window",cv::WINDOW_AUTOSIZE);
+  cv::imshow("Display window",image);
+
+  cv::waitKey(0);
+  return 0;
+
+}
+
+// x,y,width,height
+// x denotes from how much distance ROI of x start
+// y denotes from how much distance ROI of y start
+// width denotes how much width the picture should be
+// height denotes how much height the picture should be

basics/.idea/modules.xml

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+/*
+Reading a image and finding ROI
+------------------------------
+
+
+Instructions to run the code
+-----------------------------
+
+> g++ 3_program.cpp -o app `pkg-config --cflags --libs opencv`
+> ./app
+
+*/
+
+
+
+#include <opencv2/highgui.hpp>
+#include "opencv2/core/core.hpp"
+
+#include <iostream>
+using namespace std;
+using namespace cv;
+
+int main(int argc,char** argv){
+
+  Mat image;
+
+  image = cv::imread("sample_two.jpeg",CV_LOAD_IMAGE_COLOR);
+  if(!image.data){
+      cout <<"could not open or find image"<< endl;
+      return -1;
+  }
+
+
+  Mat D(image,Rect(50,50,100,100)); //using a rectangle
+  // Rect(x,y,width,height)
+  // from point 50,50 (x,y) 100 pixels to right and 100 pixels down are taken .
+
+
+
+  namedWindow("Display window",cv::WINDOW_AUTOSIZE);
+  imshow("Display window",D);
+
+  waitKey(0);
+  return 0;
+
+}
+
+// x,y,width,height
+// x denotes from how much distance ROI of x start
+// y denotes from how much distance ROI of y start
+// width denotes how much width the picture should be
+// height denotes how much height the picture should be