Qt 5.3 下OpenCV 2.4.11 开发（13）腐蚀与膨胀

默认的腐蚀与膨胀操作，原理：点击打开链接

#include <QCoreApplication>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{   
    Mat src = imread("lena.jpg", 0);
    Mat dst, eroded, dilated;
    Mat element(7, 7, CV_8U, Scalar(1));
    threshold(src, dst, 100, 255, THRESH_BINARY_INV);//二图像值化
    namedWindow("dst", 0);
    imshow("dst", dst);

    erode(dst, eroded, Mat());//腐蚀
    namedWindow("eroded", 0);
    imshow("eroded", eroded);

    dilate(dst, dilated, Mat());//膨胀
    namedWindow("dilated", 0);
    imshow("dilated", dilated);

    waitKey(0);
}

函数介绍：

1、threshold 函数用于将灰度图像处理为二值化图像，第一个参数为输入的灰度图像，第二个参数为输出的二值化图像，第三个参数为阈值，第四个参数为满足阈值条件的像素转变成的数据，第五个参数为正反切换。还有一个THRESH_BINARY，效果相反。

在加入了强度系数之后：

#include <QCoreApplication>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{   
    Mat src = imread("lena.jpg", 0);
    Mat dst, eroded, dilated;
    Mat element(7, 7, CV_8U, Scalar(1));
    threshold(src, dst, 100, 255, THRESH_BINARY_INV);
    namedWindow("dst", 0);
    imshow("dst", dst);

    erode(dst, eroded, element);
    namedWindow("eroded", 0);
    imshow("eroded", eroded);

    dilate(dst, dilated, element);
    namedWindow("dilated", 0);
    imshow("dilated", dilated);

    waitKey(0);
}

函数介绍：

1、element 矩阵是腐蚀和膨胀的强度，这里用的是7*7的结构元素。