图像处理基础2

Mat src, dst;

int threshold_value = 127;

int threshold_max = 255;

const char* output_title = "binary image";

void Threshold_dome(int, void*);

Mat gray_src;

int type_value = 2;

int type_max = 5;

 

 int main(int argc, char** argv) {

     

     // 形态学

     char output_win[] = "output image";

     src = imread("D:/opencvsp/pic.png");

     if (!src.data)

     {

          printf("could not load image..\n");

          return -1;

     }

     namedWindow("input img", WINDOW_AUTOSIZE);

     imshow("input img", src);

     //上采样

     pyrUp(src, dst, Size(src.cols * 2, src.rows * 2));

    //降采样

     pyrDown(src, dst, Size(src.cols / 2, src.rows / 2));

     //DOG

     Mat gray_src, g1, g2, dogImg;

     cvtColor(src, gray_src, COLOR_BGR2GRAY);

     GaussianBlur(gray_src, g1, Size(3, 3), 0, 0);

     GaussianBlur(g1, g2, Size(3, 3), 0);

     subtract(g1, g2, dogImg, Mat());

     //归一化

     normalize(dogImg, dogImg, 255, 0, NORM_MINMAX);

     imshow("dogImg", dogImg);

 

 

 

     ///基本阈值操作

     createTrackbar("threshold value:", output_title,&threshold_value,threshold_max, Threshold_dome);

     createTrackbar("threshold value:", output_title, &type_value, type_max, Threshold_dome);

     

     waitKey(0);

     return 0;

 }

 void Threshold_Demo(int, void*) {

     cvtColor(src, gray_src, COLOR_BGR2GRAY);

     //threshold(gray_src, dst, threshold_value, threshold_max, type_value);

     threshold(gray_src, dst, 0, 255, THRESH_OTSU|type_value);  //THRESH_TRIANGLE

     imshow(output_title, dst);

 }

 

Mat src, dst;

     // sobel算子

     char output_win[] = "output image";

     src = imread("D:/opencvsp/pic.png");

     if (!src.data)

     {

          printf("could not load image..\n");

          return -1;

     }

     namedWindow("input img", WINDOW_AUTOSIZE);

     imshow("input img", src);

    //sobelx 方向

     Mat kernel_x = (Mat_<int>(3, 3) << -1, 0, -1, -2, 0, 2, -1, 0, 1);

     filter2D(src, dst, -1, kernel_x, Point(-1, -1), 0.0);

     //Sobel Y 方向

     Mat ying;

     Mat kernel_y = (Mat_<int>(3, 3) << 0, -1, 0, -1, 4, -1, 0, -1, 0);

     filter2D(src, dst, -1, kernel_y, Point(-1, -1), 0.0);

     imshow(output_win, dst);

     int ksize;

     int c = 0;

     int index = 0;

     while (true)

     {

          c = waitKey(500);

          if ((char)c == 27)

          {

              break;

          }

          ksize = 4 + (index % 8) * 2 + 1;

          Mat kernel = Mat::ones(Size(ksize,ksize),CV_32F/(float)(ksize * ksize));

          filter2D(src, dst, -1, kernel, Point(-1, -1));

          index++;

          imshow(output_win,dst);

     }

 

Mat src, dst,gray_src;

 

int t1_value = 50;

int max_value = 255;

int type_max = 5;

 

 int main(int argc, char** argv) {

     src = imread("D:/opencvsp/pic.png");

     if (!src.data)

     {

          printf("could not load image..\n");

          return -1;

     }

     //Laplacian

     //Canny边缘检测

     cvtColor(src, gray_src, COLOR_BGR2GRAY);

     createTrackbar("threshold", "output", &t1_value, max_value, Canny_Demoe);

 

     waitKey(0);

     return 0;

 }

 

 void Canny_Demoe(int, void*) {

     Mat edge_output;

     blur(gray_src, gray_src, Size(3, 3), Point(-1, -1), BORDER_DEFAULT);

     Canny(gray_src, edge_output, t1_value, t1_value * 2, 3, false);

     dst.create(src.size(), src.type());

     Mat mask1 = Mat::zeros(src.size(), src.type());

     src.copyTo(dst, edge_output);

 }

 

 

//霍夫变换直线

     //Canny边缘检测

     Canny(src, gray_src, 100, 200);

     cvtColor(gray_src, dst, COLOR_GRAY2BGR);

     std::vector<Vec4f> plines;

     HoughLinesP(gray_src, plines, 1, CV_PI / 180.0, 10, 0, 0);

     Scalar color = Scalar(0, 0, 255);

     for (size_t i = 0; i < plines.size(); i++)

     {

          Vec4f hline = plines[i];

          line(dst, Point(hline[0], hline[1]), Point(hline[2], hline[3]), color, 3, LINE_AA);

     }

     imshow("outputtitle", dst);

 

 

//霍夫变换直线

     //Canny边缘检测

     Canny(src, gray_src, 100, 200);

     cvtColor(gray_src, dst, COLOR_GRAY2BGR);

     std::vector<Vec4f> plines;

     HoughLinesP(gray_src, plines, 1, CV_PI / 180.0, 10, 0, 0);

     Scalar color = Scalar(0, 0, 255);

     for (size_t i = 0; i < plines.size(); i++)

     {

          Vec4f hline = plines[i];

          line(dst, Point(hline[0], hline[1]), Point(hline[2], hline[3]), color, 3, LINE_AA);

     }

     imshow("outputtitle", dst);

 

     //霍夫变换园检测

     Mat moutout;

     medianBlur(src, moutout, 3);

     cvtColor(moutout, moutout, COLOR_BGR2GRAY);

 

     std::vector<Vec3f> pcircles;

     HoughCircles(moutout, pcircles, HOUGH_GRADIENT, 1, 10, 100, 30, 5, 50);

     src.copyTo(dst);

     for (size_t i = 0; i < pcircles.size(); i++)

     {

          Vec3f cc = pcircles[i];

          circle(dst, Point(cc[0], cc[1]), cc[2], Scalar(0, 0, 255), 2, LINE_AA);

          circle(dst, Point(cc[0], cc[1), 2, Scalar(198, 23, 155), 2, LINE_AA);

     }

     imshow("outputtitle", dst);