Opencv .at 方法没有按预期工作？

Question

尝试执行一些简单的转换以使我的相机姿势更易于管理，我将运行归为一期：

    vector< Mat> newpoints; 

    Mat oldpoint =  Mat::zeros(4,1, CV_32F);

    oldpoint.at<float>(3,0) = 1.0;

    Mat translation = Mat::zeros(4, 4, CV_32F);
    Mat rotation = Mat::zeros(4, 4, CV_32F);
    Mat tmp_rot = Mat::zeros(3,3,CV_32F);
    Mat trans;
    Mat rota;

cout << "rearranging coords" << endl;

for(int i = 0; i < tvecs.size(); i++){
    trans = tvecs[i];
    rota = rvecs[i];

    translation.at<float>(0,0) = 1.0;
    translation.at<float>(1,1) = 1.0;
    translation.at<float>(2,2) = 1.0;
    translation.at<float>(3,3) = 1.0;

    translation.at<float>(0,3) = trans.at<float>(0);
    translation.at<float>(1,3) = trans.at<float>(1);
    translation.at<float>(2,3) = trans.at<float>(2);

    Rodrigues(rota, tmp_rot);

    rotation.at<float>(0,0) = tmp_rot.at<float>(0,0);
    rotation.at<float>(0,1) = tmp_rot.at<float>(0,1);
    rotation.at<float>(0,2) = tmp_rot.at<float>(0,2);
    rotation.at<float>(1,0) = tmp_rot.at<float>(1,0);
    rotation.at<float>(1,1) = tmp_rot.at<float>(1,1);
    rotation.at<float>(1,2) = tmp_rot.at<float>(1,2);
    rotation.at<float>(2,0) = tmp_rot.at<float>(2,0);
    rotation.at<float>(2,1) = tmp_rot.at<float>(2,1);
    rotation.at<float>(2,2) = tmp_rot.at<float>(2,2);
    rotation.at<float>(3,3) = 1.0;
}

当我在右侧使用 .at 时，for 中的值分配毫无意义。它们与原始矩阵中的值完全不同。

Answer 1

正如 Micha 所指出的，存在类型不匹配。

修复者：

    tvecs[i].convertTo(trans, CV_32F);
    rvecs[i].convertTo(rota, CV_32F);
    //trans = tvecs[i];
    //rota = rvecs[i];

Opencv .at 方法没有按预期工作？

Opencv .at method not working as intended?

opencv

mat