二值化图像中统计每列行白点的数量

小v 2021-4-26 1179 0

    opencv 统计一列或者一行种某个像素的数量

    二值化种统计每列行白点的数量

    int nRow = thresh.rows;

    int nCol = thresh.cols;

    int cnt =0;

    for (int i = 0; i < nRow; i++)

{

    uchar *data = thresh.ptr<uchar>(i);

    for (int j = 0; j < nCol; j++)

{

    if (*data == 255)

    cnt ++;

    *data++;

}

    // 数量的阈值

    if(cnt < 200)

{

    uchar *da  = thresh.ptr<uchar>(i);

    for (int j = 0; j < nCol; j++)

{

    *da =0;

    *da++;

}

    }else

{

    uchar *da  = thresh.ptr<uchar>(i);

    for (int j = 0; j < nCol; j++)

{

    *da =255;

    *da++;

}

}

    printf("%d point count: %d\n",i,cnt);

    cnt =0;

}