Change Read Only Properties to writable?
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Using the vision toolbox for camera calibration you get the cameraParams out. These params are only read. How is it possible to do some changes in these params or a good way to by pass these limia
cameraParams=estimateCameraParameters(imagePoints, worldPoints)
Why I want to change it, I want to use a different radial and tangential distortion which I found in C+ with OpenCV and create a undistorted image and it's undistorted points.
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wei le
2018년 3월 7일
편집: wei le
2018년 3월 7일
cameraParameters = vision.CameraParameters returns an object that contains the intrinsic, extrinsic, and lens distortion parameters of a camera. cameraParameters = vision.CameraParameters(Name,Value) configures the camera parameters object properties, specified as one or more Name,Value pair arguments. Unspecified properties use default values.
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Dima Lisin
2015년 2월 16일
Hi Joep,
You can create another cameraParameters object using the constructor, and pass in all the parameters using name-value pairs. Fore example, let's say you have cameraParams1, and you want to replace its radial and tangential distortion coefficients. You can do the following:
cameraParams2 = cameraParameters('IntrinsicMatrix', ...
cameraParams1.IntrinsicMatrix, 'RadialDistortion', [0.2, -0.1], ...
'TangentialDistortion', [0.1, 0.1]);
Out of curiosity, what makes you think that the distortion coefficients you found using OpenCV are better?
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Dima Lisin
2015년 2월 17일
편집: Dima Lisin
2015년 2월 17일
Yes, the matrix is transposed, because of the different vector-matrix multiplication convention used by the MATLAB Computer Vision System toolbox. But also the pixel coordinates in OpenCV are off by 1, relative to those in MATLAB. In matlab the center of the top-left pixel of the image is (1,1). In OpenCV it is (0,0). That's why the optical center (u0, v0) will be one less in OpenCV.
I was wrong about the units of the distortion coefficients. They are, in fact, dimensionless. Please see my answer to your other question.
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Joel David Berkson
2021년 7월 1일
Found a much better way to do this! Use the 'toStruct' function on the cameraparamets (this converts it to a normal struct that can be editted) then use the cameraParameters function to convert it back :-)
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