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 pcfitcylinder
以将圆柱体安装到 pointCloud
对象.让我们从生成示例数据开始看它如何工作:
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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