擅长:python、mysql、java
<p>可以使用主成分分析(PCA)检查三维曲面是否平坦(如果是平面/直线),可以尝试以下代码:</p>
<pre><code>from sklearn import decomposition
def isPlaneLine(XYZ):
'''
XYZ is n x 3 metrix storing xyz coordinates of n points
It uses PCA to check the dimensionality of the XYZ
th is the threshold, the smaller, the more strict for being
planar/linearity
return 0 ==> randomly distributed
return 1 ==> plane
return 2 ==> line
'''
th = 1e-3
pca = decomposition.PCA()
pca.fit(XYZ)
pca_r = pca.explained_variance_ratio_
t = np.where(pca_r < th)
return t[0].shape[0]
</code></pre>