opencv读取文件夹中的图片

http://blog.csdn.net/yang6464158/article/details/41622711
http://jingyan.baidu.com/article/656db918a7e848e381249c0e.html
在opencv里读取文件夹里的图是一件很重要的工作，尤其是一组序列图像，然后对每一张图像都进行操作。

方法一，用 filename，sprintf_s，imread

    char filename[100];    Mat srcImage, dstImage;    for (unsigned int i = 0; i < 100; i++)    {        sprintf_s(filename, "E://imageseries//bw_%04d.png", i);        srcImage = imread(filename, 0);//读取文件夹里的图像    if (!srcImage.data){ printf("error!\n"); return false; }        imshow("image", srcImage);        waitKey(1000);...//保存处理的图像到文件夹，在读入程序里面添加sprintf__s(filename, "E://imageseries//after//bw_%04d.png", i);imwrite(filename,dstImage)}

方法二、用VideoCapture sequence
用

    string first_file = "E://imageseries//bw_%04d.png";    VideoCapture sequence(first_file);    if (!sequence.isOpened())    {        cerr << "Failed to open the image sequence!\n" << endl;        return 1;    }    Mat image;    namedWindow("Image sequence", 1);    for (;;){        sequence >> image;        if (image.empty())        {            cout << "End of Sequence" << endl;            break;        }        imshow("Image sequence", image);        waitKey(300);    }

方法三：
string src_image_name = “F:\imageseries\before\”;
string src_image_name_after = “F:\imageseries\after\”;
string src_image_name1 = src_image_name;
char num[3], num1[4] = “1 (“, num2[6] = “).png”;
string num3 = “.png”;
for (i = 1; i <= 3; i++)
{
itoa(i, num, 10);
src_image_name += num1;
src_image_name += num;
src_image_name += num2;
cout << src_image_name << endl;
src = imread(src_image_name, 1);
imshow(src_image_name, src);
}