Error when importing OpenCV 2.4.11 in Python 2.7

Question

Whenever I try to import OpenCV in python 2.7 it gives me the error:

import cv2
ImportError: DLL load failed: %1 is not a valid Win32 application (When using

the x64 version), and when I use the x86 version I get

import cv2
ImportError: numpy.core.multiarray failed to import

also, when I try to import numpy.core.multiarray, it says:

the API was compiled against numpy version 9 but you have version 7
AttributeError: 'module' object has no attribute 'core'

I am using Windows 10 & OpenCV 2.4.11 (I tried opencv 3.0.0 but it gives the same error) & I used this guide to install opencv http://opencvpython.blogspot.co.uk/2012/05/install-opencv-in-windows-for-python.html

The error-message is very clear: you have an outdated numpy version. — deets
– deets, Commented Feb 16, 2016 at 16:30
I don't know how to update it though... I have tried going on to sourceforge and getting the latest installer and then using that, but it still gives the same error. Also pip install numpy --upgrade does nothing. Thanks for helping @deets — ChK
– ChK, Commented Feb 16, 2016 at 19:27
I am using Numpy 1.6.1 as returned by numpy.__version__ @deets — ChK
– ChK, Commented Feb 16, 2016 at 19:40
See here: stackoverflow.com/questions/20999939/… - you need Numpy 1.8 — deets
– deets, Commented Feb 16, 2016 at 19:42
Thanks so much! It worked! Maybe you'll want to write an answer so I can mark it as accepted. You'll probably get some reputation as well @deets — ChK
– ChK, Commented Feb 16, 2016 at 19:55

Peter Mortensen · Accepted Answer · 2016-09-11 10:40:51Z

0

If anything doesn't work, what the main cause can be is that you should download the 32-bit version of OpenCV (3.x) and Python (2.x) because NumPy is not available in a 64-bit version as of now (2016-07-06). You can visit Install OpenCV-Python in Windows (for Windows; for another OS reach the page a step behind).

edited Sep 11, 2016 at 10:40

Peter Mortensen

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answered Jul 6, 2016 at 17:00

Ansh Arora

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