opencv笔记二（矩阵边界填充）

矩阵的边界填充类型

Mat C =(Mat_<uchar>(3,3)<<1,2,3,4,5,6,7,8,9);
    uchar *data = NULL;
    for (int row = 0; row < C.rows; row++)
    {
        data = (uchar *)C.ptr<uchar>(row);
        cout << "[";
        for (int col = 0; col < C.cols; col++)
        {
            cout << (int)data[col] << " ";
        }
        cout << "]"  << endl;
    }
    Mat D;
    copyMakeBorder(C, D, 2, 2, 2, 2, BORDER_REPLICATE);
    for (int row = 0; row < D.rows; row++)
    {
        data = (uchar *)D.ptr<uchar>(row);
        cout << "[";
        for (int col = 0; col < D.cols; col++)
        {
            cout << (int)data[col] << " ";
        }
        cout << "]"  << endl;
    }
    cout << endl;

结果

其他填充类型：

//! Various border types, image boundaries are denoted with `|`
//! @see borderInterpolate, copyMakeBorder
enum BorderTypes {
    BORDER_CONSTANT    = 0, //!< `iiiiii|abcdefgh|iiiiiii`  with some specified `i`
    BORDER_REPLICATE   = 1, //!< `aaaaaa|abcdefgh|hhhhhhh`
    BORDER_REFLECT     = 2, //!< `fedcba|abcdefgh|hgfedcb`
    BORDER_WRAP        = 3, //!< `cdefgh|abcdefgh|abcdefg`
    BORDER_REFLECT_101 = 4, //!< `gfedcb|abcdefgh|gfedcba`
    BORDER_TRANSPARENT = 5, //!< `uvwxyz|abcdefgh|ijklmno`

    BORDER_REFLECT101  = BORDER_REFLECT_101, //!< same as BORDER_REFLECT_101
    BORDER_DEFAULT     = BORDER_REFLECT_101, //!< same as BORDER_REFLECT_101
    BORDER_ISOLATED    = 16 //!< do not look outside of ROI
};