Question

我已经安装了tesseract-ocr（0.1.5）宝石。

还安装了依赖关系（tesseract / 3.04.00和leptonica / 1.72）

Mac OS X Yosemity。

当我rake db:migrate时出现错误：

rake aborted!
CompilationError: compile error: see logs at /var/folders/xg/g9n7qvns5z1gsr_yjh09n1nm0000gn/T/.ffi-inline-501/d2f8bb8a1867b800ff8ad69a3b850c91521b3760.log
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/compilers/gcc.rb:35:in `compile'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/builders/c.rb:114:in `shared_object'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/builders.rb:90:in `block in build'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/builders.rb:87:in `instance_eval'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/builders.rb:87:in `build'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/inline.rb:54:in `singleton_inline'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/ffi-inline-0.0.4.3/lib/ffi/inline/inline.rb:39:in `inline'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:30:in `<module:BaseAPI>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:27:in `<module:C>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:25:in `<module:Tesseract>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:25:in `<top (required)>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:83:in `<top (required)>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/api.rb:26:in `<top (required)>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract-ocr.rb:35:in `<top (required)>'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
/Users/user/work/project/config/application.rb:17:in `<top (required)>'
/Users/user/work/project/Rakefile:4:in `<top (required)>'

在日志中：

g++ -dynamic -bundle -fPIC    -o /var/folders/xg/g9n7qvns5z1gsr_yjh09n1nm0000gn/T/.ffi-inline-501/d2f8bb8a1867b800ff8ad69a3b850c91521b3760.dylib /var/folders/xg/g9n7qvns5z1gsr_yjh09n1nm0000gn/T/.ffi-inline-501/d2f8bb8a1867b800ff8ad69a3b850c91521b3760.cpp -ltesseract 2>>/var/folders/xg/g9n7qvns5z1gsr_yjh09n1nm0000gn/T/.ffi-inline-501/d2f8bb8a1867b800ff8ad69a3b850c91521b3760.log
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:171:10: error: no matching member function for call to 'SetImage'
                                api->SetImage(pix);
                                ~~~~~^~~~~~~~
/usr/local/include/tesseract/baseapi.h:354:8: note: candidate function not viable: 1st argument ('const Pix *') would lose const qualifier
  void SetImage(Pix* pix);
       ^
/usr/local/include/tesseract/baseapi.h:341:8: note: candidate function not viable: requires 5 arguments, but 1 was provided
  void SetImage(const unsigned char* imagedata, int width, int height,
       ^
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:183:49: error: cannot initialize a parameter of type 'tesseract::TessResultRenderer *' with an lvalue of type 'STRING *'
                                return api->ProcessPages(filename, NULL, 0, output);
                                                                            ^~~~~~
/usr/local/include/tesseract/baseapi.h:542:63: note: passing argument to parameter 'renderer' here
                    int timeout_millisec, TessResultRenderer* renderer);
                                                              ^
/Users/user/.rvm/gems/ruby-2.2.2@project/gems/tesseract-ocr-0.1.5/lib/tesseract/c/baseapi.rb:189:65: error: cannot initialize a parameter of type 'tesseract::TessResultRenderer *' with an lvalue of type 'STRING *'
                                return api->ProcessPage(pix, page_index, filename, NULL, 0, output);
                                                                                            ^~~~~~
/usr/local/include/tesseract/baseapi.h:558:40: note: passing argument to parameter 'renderer' here
                   TessResultRenderer* renderer);
                                       ^

我该如何解决？

更新：这不是重复的问题。它没有帮助Error setting up the tesseract OCR in gem in rails

Answer 1

Tesseract开发人员在版本3.0.4中改变了一些东西，并且tesseract-ocr gem与它失去了兼容性。我看到的最佳解决方案是降级。您可以在Mac上安装以前版本的Tesseract，使用brew info tesseract查找。如果是这样，请使用brew switch。我最近做了brew cleanup，所以我不得不卸载tesseract并从旧公式中安装它，如下所示：

$ brew uninstall tesseract
$ brew install https://raw.githubusercontent.com/Homebrew/homebrew/8ba134eda537d2cee7daa7ebdd9f728389d9c53e/Library/Formula/tesseract.rb

这将安装似乎有效的Tesseract 3.02.02_3d。您可以在tesseract-ocr repo找到更多信息并跟踪此问题。

Answer 2

如果您不想降级Tesseract，另一种快速而又脏的方法是将Tesseract作为shell命令执行并打开它保存的文件以访问内容（注意：字符串插值在shell中有效）命令）

input_image = 'input.tif'
`tesseract #{input_image} output -l eng`
file = File.open('output.txt')

Answer 3

从生成的日志中显示我丢失了头文件，我的问题是我引用了错误的版本，所以，将这些代码添加到gem文件为我解决了问题

ENV['CFLAGS'] = '-I/usr/local/Cellar/tesseract/3.02.02_3/include -I/usr/local/Cellar/leptonica/1.71_1/include'
ENV['LDFLAGS'] = '-L/usr/local/Cellar/tesseract/3.02.02_3/lib -L/usr/local/Cellar/leptonica/1.71_1/lib'

也要检查你自己的tesseract版本和leptonica

mac os x上的Tesseract-ocr gem问题

3 个答案: