Is there a Matlab version of the OpenCV function initUndist​ortRectify​Map()?

2020 11 10
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更新时间：2022 6 15
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Yuval Levental
Yuval Levental 2020-11-15

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Answering my own question. There isn't such a function, but finding the (x, y) bounds and Homography matrices from ComputeRectificationParams.m, then using the Homography and undistortion equations, then using interp2 to move forward gives accurate rectification. See https://www.mathworks.com/help///visionhdl/ug/stereoscopic-rectification.html for details.

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ft28
ft28 2022-6-15
Hi Yuval, I am also looking for the mapx and mapy calculation like in OpenCV cvInitUndistortRectifyMap().
How did you solve that with using homography matrix and x,y bounds?
I received these information by using paramStruct = toStruct(stereoParams) and get H1, H2, XBounds, YBounds, but dont have any idea how to proceed now. Do you have any code to share?
Thx
Fatih

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Debasish Samal
Debasish Samal 2020-11-13

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Hi,
The rectifyStereoImages function returns undistorted and rectified versions of the input images using the stereo parameters. I think, this is what you are looking for. Please refer to the documentation of the same to know more about the function.
Thanks.
-Debasish

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Yuval Levental
Yuval Levental 2020-11-13
Hello, I know about this function, but I need something that specifically returns the x and y transformation maps.
For instance, the Undistortion block outputs coordinates (u,v) at https://www.mathworks.com/help///visionhdl/ug/stereoscopic-rectification.html
Is there a similar command in Matlab?

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