如何在MATLAB中将圆柱拟合到分散的3D XYZ点数据? [英] How to fit a cylinder to scattered 3D XYZ point data in MATLAB?

问题描述

我想知道是否有人可以为我提供一些代码示例，以便在MATLAB Curve Fitting Toolbox中使用分散的XYZ点数据?我想将曲面拟合为近似圆柱的点.

I was wondering if it was possible for someone to provide me with some code examples for working with scattered XYZ point data in MATLAB Curve Fitting Toolbox? I would like to fit a surface to points that approximate a cylinder.

谢谢.

推荐答案

在Matlab R2015b及更高版本中，您可以使用

In Matlab R2015b and above, You can use pcfitcylinder to fit a cylinder to a pointCloud object. Let's start with producing an example data to see how it works:

[theta, r, h] = meshgrid(0:.1:6.28, 1, 0:.2:4); % making a cylinder
r = r + 0.05 * randn(size(r)); % adding some radial noise
[x, y, z] = pol2cart(theta, r, h); % transforming the coordinate system
P = (rotx(60) * [x(:), y(:), z(:)]')'; % rotating the data points around x axis
figure;
scatter3(P(:, 1), P(:, 2), P(:, 3))
axis equal

如下创建点云对象:

ptCloud = pointCloud(P);

然后可以安装模型:

maxDistance = 0.02;
model = pcfitcylinder(ptCloud, maxDistance);
hold on
plot(model)

根据您的数据，要获取一个合理的圆柱，您可能需要查看pcfitcylinder并考虑包括其他输入参数.

Depending on your data, to get a reasonable cylinder you might need to take a look at pcfitcylinder and consider including other input arguments.

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