擅长:python、mysql、java
<p>将OpenCV的<a href="https://docs.opencv.org/3.0-beta/modules/imgcodecs/doc/reading_and_writing_images.html?highlight=imread#cv2.imread" rel="nofollow noreferrer">imread()</a>函数与<a href="https://www.tutorialspoint.com/python/os_listdir.htm" rel="nofollow noreferrer">os.listdir()</a>一起使用,比如</p>
<pre><code>import numpy as np
import cv2
import os
instances = []
# Load in the images
for filepath in os.listdir('images/'):
instances.append(cv2.imread('images/{0}'.format(filepath),0))
print(type(instances[0]))
</code></pre>
<blockquote>
<p>class 'numpy.ndarray'</p>
</blockquote>
<p>这将返回一个列表(=<code>instances</code>),其中存储图像的所有灰度值。对于彩色图像,只需设置<code>.format(filepath),1</code>。</p>