title: License plate recogntion using OpenCV
body: <p>I got a good Automatic Number Plate Recognition Project from github (<a href="https://github.com/kornelik/anpr" rel="nofollow">https://github.com/kornelik/anpr</a> ). In order to run this we need OpenCV  and Tesseract Optical Character Recognition library (<a href="https://code.google.com/p/tesseract-ocr/" rel="nofollow">https://code.google.com/p/tesseract-ocr/</a>). It works fine in my Ubuntu 12.04 , 32bit system.</p>
  
  <p>The problem is that while I setting the same working code in another system (Ubuntu 12.04 , 32 bit) after configuring OpenCV and Tesseract it produces the following error while making the project.I am struggling to find out what is the issue</p>
  
  <p>The error is</p>
  
  <pre><code>g++ -Wall -Werror -O2 -c main.cpp -o main.o
  g++ -Wall -Werror -O2 -c recognizer.cpp -o recognizer.o
  g++ -Wall -Werror -O2 -c conio.cpp -o conio.o
  g++ -Wall -Werror -O2 -c ocr_char.cpp -o ocr_char.o
  ocr_char.cpp: In constructor ‘anpr::OCRChar::Impl::Impl(const     string&amp;, const string&amp;)’:
  ocr_char.cpp:17:9: error: ‘set’ is not a member of ‘std’
  ocr_char.cpp:17:18: error: expected primary-expression before ‘char’
  ocr_char.cpp:17:18: error: expected ‘;’ before ‘char’
  ocr_char.cpp:23:17: error: ‘goodChars’ was not declared in this     scope
  make: *** [ocr_char.o] Error 1
  </code></pre>