【OpenCV】腐蚀膨胀

腐蚀：
Erosion is the sister of dilation. It computes a local minimum over the area of given kernel.

膨胀：
compute the maximal pixel value overlapped by B and replace the image pixel in the anchor point position with that maximal value.

代码示例

#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"using namespace cv;Mat src, erosion_dst, dilation_dst;int erosion_elem = 0;
int erosion_size = 0;
int dilation_elem = 0;
int dilation_size = 0;
int const max_elem = 2;
int const max_kernel_size = 21;void Erosion(int, void*);
void Dilation(int, void*);int main(int, char** argv)
{const char* filename = "../data/lena.jpg";src = imread(filename, IMREAD_COLOR);if (src.empty()){   return -1;}namedWindow("Erosion Demo", WINDOW_AUTOSIZE);namedWindow("Dilation Demo", WINDOW_AUTOSIZE);moveWindow("Dilation Demo", src.cols, 0);createTrackbar("Element", "Erosion Demo",                                   // 腐蚀方法&erosion_elem, max_elem, Erosion);createTrackbar("Kernel", "Erosion Demo",                                    // 腐蚀掩模大小&erosion_size, max_kernel_size, Erosion);   createTrackbar("Element", "Dilation Demo",                                  // 膨胀方法&dilation_elem, max_elem, Dilation);createTrackbar("Kernel", "Dilation Demo",                                   // 膨胀掩模大小&dilation_size, max_kernel_size, Dilation);Erosion(0, 0);Dilation(0, 0);waitKey(0);return 0;
}void Erosion(int, void*)
{int erosion_type = 0;if (erosion_elem == 0)      { erosion_type = MORPH_RECT; }else if (erosion_elem == 1) { erosion_type = MORPH_CROSS; }else if (erosion_elem == 2) { erosion_type = MORPH_ELLIPSE; }Mat element = getStructuringElement(erosion_type, Size(2 * erosion_size + 1, 2 * erosion_size + 1),   Point(erosion_size, erosion_size));erode(src, erosion_dst, element);                                           // 腐蚀imshow("Erosion Demo", erosion_dst);
}void Dilation(int, void*)
{int dilation_type = 0;if (dilation_elem == 0)      { dilation_type = MORPH_RECT; }            // 矩形else if (dilation_elem == 1) { dilation_type = MORPH_CROSS; }           // 十字型else if (dilation_elem == 2) { dilation_type = MORPH_ELLIPSE; }         // 椭圆Mat element = getStructuringElement(dilation_type, Size(2 * dilation_size + 1, 2 * dilation_size + 1), Point(dilation_size, dilation_size));dilate(src, dilation_dst, element);                                         // 膨胀imshow("Dilation Demo", dilation_dst);
}

运行结果

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【OpenCV】腐蚀膨胀

代码示例

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