// 驗證碼識別.cpp: 定義控制檯應用程式的入口點。
//

#include "stdafx.h"
#include "opencv2/opencv.hpp"
using namespace cv;


int main()
{
    Mat src, grayImage, thresholdImage;
    src = imread("charc.png");
    if (src.empty()) {
        return -1;
    }
    namedWindow("src");
    imshow("src",src);

    //轉換成灰度影象
    cvtColor(src, grayImage, CV_BGRA2GRAY);
    namedWindow("gray"
 
);
    imshow("gray", grayImage);


    //轉換成二值影象
    adaptiveThreshold(grayImage, thresholdImage, 255, ADAPTIVE_THRESH_MEAN_C, THRESH_BINARY, 15, 3);
    namedWindow("thresholdImage");
    imshow("thresholdImage", thresholdImage);


    Mat temp1,temp2;
    Mat kelner = getStructuringElement(MORPH_RECT, Size(3
 
, 3), Point(-1, -1));
    erode(~thresholdImage,temp1, kelner, Point(-1,-1)); //腐蝕
    dilate(temp1, temp2, kelner, Point(-1, -1)); //膨脹
    bitwise_not(temp2, temp2); //影象反色
    namedWindow("morph");
    imshow("morph", temp2);

    waitKey();
    return 0;
}