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  1. #include <iostream>
  2. #include "opencv2\opencv.hpp"
  3.  
  4. using namespace std;
  5. using namespace cv;
  6.  
  7. class Strategy
  8. {
  9. public:
  10.     //uchar *RGB;
  11.     int mean,_count,k;
  12.     virtual ~Strategy() {}
  13.     virtual Mat process_image(Mat &image) = 0;
  14. };
  15.  
  16. class Context
  17. {
  18. public:
  19.     Mat ContextInterface(Strategy *pStrategy,Mat &image);
  20. };
  21.  
  22. class original : public Strategy
  23. {
  24. public:
  25.     virtual ~original() {}
  26.  
  27.     virtual Mat process_image(Mat &image);
  28. };
  29.  
  30. class gray : public Strategy
  31. {
  32. public:
  33.     virtual ~gray() {}
  34.  
  35.     virtual Mat process_image(Mat &image);
  36. };
  37.  
  38. class threshhold : public Strategy
  39. {
  40. public:
  41.     virtual ~threshhold() {}
  42.  
  43.     virtual Mat process_image(Mat &image);
  44. };
  45.  
  46. Mat Context::ContextInterface(Strategy *pStrategy,Mat &image)
  47. {
  48.     return pStrategy->process_image(image);
  49. }
  50.  
  51. Mat original::process_image(Mat &image)
  52. {
  53.     return image;
  54. }
  55.  
  56. Mat gray::process_image(Mat &image)
  57. {
  58.     mean=_count=0;
  59.     for(int i=0; i<image.rows; i++)
  60.     {
  61.         for(int j=0; j<image.cols; j++)
  62.         {
  63.             k=0.333*(image.at<Vec3b>(i,j)[2]+image.at<Vec3b>(i,j)[1]+image.at<Vec3b>(i,j)[0]);
  64.             image.at<Vec3b>(i,j)[2]=image.at<Vec3b>(i,j)[1]=image.at<Vec3b>(i,j)[0]=k;
  65.             mean+=k;
  66.             ++_count;
  67.         }
  68.     }
  69.     return image;
  70. }
  71.  
  72. Mat threshhold::process_image(Mat &image)
  73. {
  74.     for(int i=0; i<image.rows; i++)
  75.     {
  76.         for(int j=0; j<image.cols; j++)
  77.         {
  78.             if(image.at<Vec3b>(i,j)[2]<mean)
  79.             {
  80.                 image.at<Vec3b>(i,j)[2]=image.at<Vec3b>(i,j)[1]=image.at<Vec3b>(i,j)[0]=0;
  81.             }
  82.             else
  83.             {
  84.                 image.at<Vec3b>(i,j)[2]=image.at<Vec3b>(i,j)[1]=image.at<Vec3b>(i,j)[0]=255;
  85.             }
  86.         }
  87.     }
  88.     return image;
  89. }
  90.  
  91.  
  92.  
  93. int main(void)
  94. {
  95.     Mat image=imread("pic3.png", CV_LOAD_IMAGE_COLOR);   // Read the file
  96.     Context* pContext = new Context();
  97.     Strategy* pStrategy;
  98.     int mean;
  99.  
  100.     if(! image.data )                              // Check for invalid input
  101.     {
  102.         cout <<  "Could not open or find the image" << std::endl ;
  103.         return -1;
  104.     }
  105.  
  106.     cout<<image.rows;
  107.  
  108.     //show original picture
  109.     pStrategy = new original();
  110.     namedWindow( "original", CV_WINDOW_AUTOSIZE );// Create a window for display.
  111.     imshow( "original", pContext->ContextInterface(pStrategy,image) );                   // Show our image inside it.
  112.     delete pStrategy;
  113.  
  114.     //show gray picture
  115.     pStrategy = new gray();
  116.     namedWindow( "gray", CV_WINDOW_AUTOSIZE );// Create a window for display.
  117.     imshow( "gray", pContext->ContextInterface(pStrategy,image) );                   // Show our image inside it.
  118.     mean=(pStrategy->mean)/(pStrategy->_count);
  119.     delete pStrategy;
  120.  
  121.     //show threshhold picture
  122.     pStrategy = new threshhold();
  123.     (pStrategy->mean)=mean;
  124.     namedWindow( "threshhold", CV_WINDOW_AUTOSIZE );// Create a window for display.
  125.     imshow( "threshhold", pContext->ContextInterface(pStrategy,image) );                   // Show our image inside it.
  126.     delete pStrategy;
  127.  
  128.     waitKey(0);                                          // Wait for a keystroke in the window
  129.     return 0;
  130. }
  131.  
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https://ideone.com/jP3d3
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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