擅长:python、mysql、java
<p>np.在哪里可以工作:</p>
<pre><code>arr1 = np.where(arr1 == some_given_rgb_trio, arr1, arr2)
</code></pre>
<p>渐变图像示例:</p>
<pre><code>a = np.linspace(0, 255, 256*256*3).reshape(256,256,3).astype(np.uint8)
b = np.rot90(a,1)
c = np.where(a < (50,50,50), a, b)
plt.imshow(c)
plt.show()
</code></pre>