使用conda 安装 python 3.6+opencv3

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之前在ubuntu下安装过，这次想在windows平台弄一个结果忘记怎么搞了，总是出错。

(DL) C:\Users\Administrator>conda install -c menpo opencv3
Fetching package metadata …
Solving package specifications: .
UnsatisfiableError: The following specifications were found to be in conflict:

• opencv3 -> python 2.7*
• python 3.6*
  Use “conda info < package >” to see the dependencies for each >package.

提示opencv3支持python2.7不支持python3.6，明明之前装好的，后来想想估计是opencv3版本比较模糊，要指定个具体版本的。
改用下面的安装命令，不指定版本了，让系统自动推荐最新的opencv

conda install -c menpo opencv

OK

(DL) C:\Users\Administrator>conda install -c menpo opencv
Fetching package metadata …
Solving package specifications: .
Package plan for installation in environment D:\Miniconda3\envs\DL:
The following NEW packages will be INSTALLED:
hdf5: 1.8.20-hac2f561_1 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
icc_rt: 2017.0.4-h97af966_0 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
libopencv: 3.4.2-h20b85fd_0 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
libtiff: 4.0.9-h36446d0_2 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
opencv: 3.4.2-py36h40b0b35_0 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
py-opencv: 3.4.2-py36hc319ecb_0 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
The following packages will be UPDATED:
libpng: 1.6.30-vc14_1 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free --> 1.6.34-h79bbb47_0 https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
Proceed ([y]/n)? y

哦，我用的清华镜像，安装速度贼快。

最后测试一下，没问题。

import cv2

img = cv2.imread(r'F:\Pictures\tiger.jpg')
cv2.imshow('img', img)
cv2.waitKey(0)
cv2.destroyAllWindows()