擅长:python、mysql、java
<p>通过使用适当的<a href="http://en.wikipedia.org/wiki/Five-point_stencil" rel="noreferrer">stencil</a>对数组进行卷积,可以使用卷积来计算laplacian:</p>
<pre><code>from scipy.ndimage import convolve
stencil= (1.0/(12.0*dL*dL))*np.array(
[[0,0,-1,0,0],
[0,0,16,0,0],
[-1,16,-60,16,-1],
[0,0,16,0,0],
[0,0,-1,0,0]])
convolve(e2, stencil, mode='wrap')
</code></pre>