Error in installing opencv3 with homebrew and python3

Question

I'm using homebrew installing opencv3 on OSX(EI Captain),

brew install opencv3 --with-contrib --with-python3 --HEAD

and an error occurred:

Updating Homebrew...
==> Installing opencv3 from homebrew/science
==> Cloning https://github.com/opencv/opencv.git
Updating /Users/ksun/Library/Caches/Homebrew/opencv3--git
==> Checking out branch master
==> Cloning https://github.com/opencv/opencv_contrib.git
Updating /Users/ksun/Library/Caches/Homebrew/opencv3--contrib--git
> ==> Checking out branch master
Error: No such file or directory - /private/tmp/opencv3-20170330-14255-bxsn05/3rdparty/ippicv/downloader.cmake

Can u guys help me find out how to fix it?

yjmade · Accepted Answer · 2017-04-05 02:52:33Z

19

I do brew edit opencv3, then comment the following line

inreplace buildpath/"3rdparty/ippicv/downloader.cmake",
  "${OPENCV_ICV_PLATFORM}-${OPENCV_ICV_PACKAGE_HASH}",
  "${OPENCV_ICV_PLATFORM}"

then you can reinstall again with --HEAD

The opencv repository has fix some issue also removed file 3rdparty/ippicv/downloader.cmake, so no need to patch it any more. But they didn't issue a new release, so to install --with-contrib, you have to install with --HEAD, but disable the patch of file 3rdparty/ippicv/downloader.cmake

edited Apr 5, 2017 at 2:52

answered Apr 2, 2017 at 14:57

yjmade

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4 Comments

shalott Over a year ago

This worked for me, but FYI you've got a typo in the code block (ippicv/ippicv.cmake should be ippicv/downloarder.cmake)

user391339 Over a year ago

what is --HEAD and why do we want it?

yjmade Over a year ago

If --HEAD is passed, and formula defines it, install the HEAD version, aka master, trunk, unstable. In this OpenCV case, it download source from github, compile and install

user391339 Over a year ago

OK I find out about HEAD,. --HEAD : "Rather than compiling a tagged OpenCV release (i.e., v3.0, v3.1, etc.) the --HEAD switch instead clones down the bleeding-edge version of OpenCV from GitHub. Why would we bother doing this? Simple. We need to avoid the QTKit error that plagues macOS Sierra systems with the current tagged OpenCV 3 releases (please see the “Avoiding the QTKit/QTKit.h file not found error” section of this blog post for more information)"

wenxi · Accepted Answer · 2017-03-30 17:36:21Z

8

I experienced the same problem. I solved it by running brew install opencv3 --with-contrib --with-python3

I think what happened is that people updated the ../3rdparty/ippicv folder in the repo such that the downloader.cmake file is no longer there, but they have not yet updated the brew formula.

brew install without --HEAD will build opencv3.2.0 which is good enough for me.

answered Mar 30, 2017 at 17:36

wenxi

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2 Comments

user391339 Over a year ago

what is --HEAD anyway ?

user391339 Over a year ago

I learned about HEAD now. it is a bleeding edge github version to avoid certain errors (particularly with mac os sierra QTKit)

jmizv · Accepted Answer · 2020-12-02 12:55:21Z

4

When I searched for the OpenCV Java issue this was the first result. I am posting my answer for anyone using the OpenCV Java to find it useful, too.

I was following this article: https://opencv-java-tutorials.readthedocs.io/en/latest/01-installing-opencv-for-java.html

brew tap homebrew/science 
brew install opencv3 --HEAD --with-contrib --with-java

I tried by removing --HEAD from the above command and I was able to install it sucessfully.

brew install opencv3 --with-contrib --with-java

as per this post: https://github.com/Homebrew/homebrew-science/issues/5498

edited Dec 2, 2020 at 12:55

jmizv

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answered Jun 19, 2017 at 17:49

Siva

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Comments

Cody Gray · Accepted Answer · 2017-09-26 10:40:46Z

1

I have resolved the issue in the following way:

$ brew edit opencv3

Find the following code block and comment all the 4 lines:

if build.with?("python3") && build.with?("python")
  # Opencv3 Does not support building both Python 2 and 3 versions
  odie "opencv3: Does not support building both Python 2 and 3 wrappers"
end

Finally install using the brew install command:

$ brew install opencv3 --with-contrib --with-python3

Reference: http://www.pyimagesearch.com/2017/05/15/resolving-macos-opencv-homebrew-install-errors/

edited Sep 26, 2017 at 10:40

Cody Gray♦

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answered May 15, 2017 at 15:41

Biranchi

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