OpenCV 出现 Ruby 错误

Question

我正在使用 ruby-opencv gem 在 ruby 上使用 opencv。我使用 Homebrew 来安装 opencv。 opencv 和 ruby 安装成功，但是当我尝试运行 any example -

时出现以下错误

/usr/local/Cellar/ruby/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/usr/local/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0/ruby-opencv-0.0.14/opencv.bundle, 9): Library not loaded: /usr/local/lib/libpng16.16.dylib (LoadError)
  Referenced from: /usr/local/lib/libopencv_highgui.2.4.dylib
  Reason: Incompatible library version: libopencv_highgui.2.4.dylib requires version 34.0.0 or later, but libpng16.16.dylib provides version 33.0.0 - /usr/local/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0/ruby-opencv-0.0.14/opencv.bundle
    from /usr/local/Cellar/ruby/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /usr/local/lib/ruby/gems/2.2.0/gems/ruby-opencv-0.0.14/lib/opencv.rb:11:in `<top (required)>'
    from /usr/local/Cellar/ruby/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require'
    from /usr/local/Cellar/ruby/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require'
    from /usr/local/Cellar/ruby/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in `require'
    from opencv.rb:1:in `<main>'

我该怎么做才能解决这个问题？

Answer 1

如您在错误消息中所见（此处：requires version 34.0.0 or later, but libpng16.16.dylib provides version 33.0.0）OpenCV 需要 34.00 或更高版本的 libpng（而您有 33.0.0），因此您需要安装此库的更新版本。如果简单 brew install libpng 无法解决问题，请尝试卸载它，然后使用 this solution 重新安装它。

OpenCV 出现 Ruby 错误

OpenCV with Ruby error

ruby

macos

homebrew

opencv

libpng