blocks|key|1702234|text|最有可能的是，imread调用没有成功。确保镜像"C:\Users\Pravin\Desktop\a.jpeg“存在。(扩展名.jpeg似乎不同寻常，也许它必须是.jpg?)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1702235|此外，请按照Hyperboreus的建议，尝试在文件名"C:/Users/Pravin/Desktop/a.jpg“中使用正斜杠，或转义反斜杠|1702236|"C:\\Users\\Pravin\\Desktop\\a.jpg"|code-block|syntax|javascript|1702237|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Most likely, the imread call didn't succeed. Make sure the image "C:\Users\Pravin\Desktop\a.jpeg" exists. (The extension .jpeg seems unusual, maybe it has to be .jpg?)

Also, as Hyperboreus suggests, please, try using forward slashes in the filename "C:/Users/Pravin/Desktop/a.jpg", or escape backslashes 

<pre><code>"C:\\Users\\Pravin\\Desktop\\a.jpg"
</code></pre>

blocks|key|2168847|text|错误提示您打开的图像不满足条件height+>+0和width+>+0。这可能有几个原因。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2168848|大多数情况下，这是由于imread中给出的镜像地址不存在。|2168849|有时也可能是因为编译器无法加载图像。例如，如果您在记事本中编写了一些随机字符串并将文件另存为a.jpg，则编译器可能无法加载它。|2168850|entityMap^0|F|A|Q|9|0|B|6|0|1A|5|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

The error says that the image you opened doesn't satisfy the condition <code>height &gt; 0</code> and <code>width &gt; 0</code>. This may have several reasons.

Most of the times, it is due to an inexistent image address given in <code>imread</code>. 

Sometimes it may be also because the complier failed to load the image. For example, if you write some random strings in notepad and save the file as <code>a.jpg</code>, the compiler may not be able to load it.

blocks|key|2168852|text|试试这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2168853|import+numpy+as+np
import+cv2
img+=+cv2.imread('E:/Images/ece/1.png',1)
cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()|code-block|syntax|javascript|2168854|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this...

<pre><code>import numpy as np
import cv2
img = cv2.imread('E:/Images/ece/1.png',1)
cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
</code></pre>

blocks|key|5698407|text|这是因为，python编译器找不到该位置的图像。如果您复制python工作目录中的图像并执行此操作。这对我很管用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5698408|++++#+keep+image+in+the+current+working+directory
++++img=cv2.imread('roi.jpg',1)+
++++cv2.imshow('image',img)|code-block|syntax|javascript|5698409|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It is because, python compiler cannot find the image in the place. if you copy the image in the python working directory and do this. it worked for me.

<pre class="lang-py prettyprint-override"><code> # keep image in the current working directory
 img=cv2.imread('roi.jpg',1) 
 cv2.imshow('image',img)
</code></pre>

blocks|key|1704759|text|对我来说，当我把jpeg改成jpg时，它就起作用了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1704760|试试这个，也许能行得通|1704761|import+numpy+as+np
import+cv2
img=cv2.imread('C:\Users\Pravin\Desktop\a.jpg',1)++++#changed+image+format+to+jpg
cv2.namedWindow('img',cv2.WINDOW_NORMAL)
cv2.Waitkey(10000)
cv2.imshow('cv2.WINDOW_NORMAL',img)
cv2.destoryAllWindows()|code-block|syntax|javascript|1704762|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For me it worked when i just changed jpeg to jpg

Try this, may be it will work 

<pre><code>import numpy as np
import cv2
img=cv2.imread('C:\Users\Pravin\Desktop\a.jpg',1) #changed image format to jpg
cv2.namedWindow('img',cv2.WINDOW_NORMAL)
cv2.Waitkey(10000)
cv2.imshow('cv2.WINDOW_NORMAL',img)
cv2.destoryAllWindows()
</code></pre>

Hi friends i just now installed opencv and checking the basic code but it results in error. The code is 

<pre><code>import numpy as np
import cv2
img=cv2.imread('C:\Users\Pravin\Desktop\a.jpeg',1)
cv2.namedWindow('img',cv2.WINDOW_NORMAL)
cv2.Waitkey(10000)
cv2.imshow('cv2.WINDOW_NORMAL',img)
cv2.destoryAllWindows()
</code></pre>

The error for cv2.imshow() is 

<pre><code>Traceback (most recent call last):
 File "&lt;pyshell#3&gt;", line 1, in &lt;module&gt;
cv2.imshow('image',img)
error: ..\..\..\src\opencv\modules\highgui\src\window.cpp:261: error: (-215)
size.width&gt;0 &amp;&amp; size.height&gt;0
</code></pre>

It was very helpful to me with your answer.
Thanks in advance

why cv2.imshow() results in error in my python compiler?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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朋友们，我刚刚安装了opencv并检查了基本代码，但它导致了错误。代码是import numpy as npimport cv2img=cv2.imread('C:\Users\Pravin\Desktop\a.jpeg',1)cv2.namedWindow('img',cv2.WINDOW_NORMAL)cv2.Wa...

问为什么cv2.imshow()在我的python编译器中导致错误？
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问为什么cv2.imshow()在我的python编译器中导致错误？EN