add camera parameters for the tutorial

[AleksandrPanov]

Fixes #3045
For the pose estimation example, the camera parameters are required. To work with examples from the tutorial, default camera parameters were added:

Size imgSize = inputImage.size();
cameraMatrix = Mat::eye(3, 3, CV_64FC1);
cameraMatrix.at<double>(0, 0) = cameraMatrix.at<double>(1, 1) = 650;
cameraMatrix.at<double>(0, 2) = imgSize.width / 2;
cameraMatrix.at<double>(1, 2) = imgSize.height / 2;
distCoeffs = Mat(5, 1, CV_64FC1, Scalar::all(0));

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  Patch to opencv_extra has the same branch name.
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[alalek]

AleksandrPanov self-assigned this 4 days ago

Assignment to author blocks PR merging.
This means that author wants/needs to do something (it is better to use "convert to draft" for such cases)

[AleksandrPanov]

AleksandrPanov self-assigned this 4 days ago

Assignment to author blocks PR merging. This means that author wants/needs to do something (it is better to use "convert to draft" for such cases)

Sorry, I didn't know that. In this PR, nothing else needs to be done.