<p>我需要检测图像是否被卷曲。所以我使用了一个python代码,它来自另一个stackoverflow帖子:</p>
<pre><code>import numpy as np
from PIL import Image, ImageChops
im = Image.open('img/low2.jpg')
im2 = im.transform(im.size, Image.AFFINE, (1,0,1,0,1,1))
im3 = ImageChops.subtract(im, im2)
im3 = np.asarray(im3)
im3 = np.sum(im3,axis=0)[:-1]
mean = np.mean(im3)
peak_spacing = np.diff([i for i,v in enumerate(im3) if v > mean*2])
mean_spacing = np.mean(peak_spacing)
std_spacing = np.std(peak_spacing)
</code></pre>
<p>我得到了这个错误:</p>
<blockquote>
<p>File "pixelated.py", line 11, in
peak_spacing = np.diff([i for i,v in enumerate(im3) if v > mean*2])
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()</p>
</blockquote>
<p>我该怎么解决这个问题?我是Python的新手,请告诉我任何想法或帮助。在</p>