Initial check in.

FeaturesMain.cpp

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+
+/*
+ Copyright 2012 Andrew Perrault and Saurav Kumar.
+
+ This file is part of DetectText.
+
+ DetectText is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ DetectText is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with DetectText. If not, see <http:https://www.gnu.org/licenses/>.
+*/
+#include <cassert>
+#include <fstream>
+#include "TextDetection.h"
+#include <opencv/highgui.h>
+#include <exception>
+
+void convertToFloatImage ( IplImage * byteImage, IplImage * floatImage )
+{
+ cvConvertScale ( byteImage, floatImage, 1 / 255., 0 );
+}
+
+class FeatureError : public std::exception
+{
+std::string message;
+public:
+FeatureError ( const std::string & msg, const std::string & file )
+{
+ std::stringstream ss;
+
+ ss << msg << " " << file;
+ message = msg.c_str ();
+}
+~FeatureError () throw ( )
+{
+}
+};
+
+IplImage * loadByteImage ( const char * name )
+{
+ IplImage * image = cvLoadImage ( name );
+
+ if ( !image )
+ {
+ return 0;
+ }
+ cvCvtColor ( image, image, CV_BGR2RGB );
+ return image;
+}
+
+IplImage * loadFloatImage ( const char * name )
+{
+ IplImage * image = cvLoadImage ( name );
+
+ if ( !image )
+ {
+ return 0;
+ }
+ cvCvtColor ( image, image, CV_BGR2RGB );
+ IplImage * floatingImage = cvCreateImage ( cvGetSize ( image ),
+ IPL_DEPTH_32F, 3 );
+ cvConvertScale ( image, floatingImage, 1 / 255., 0 );
+ cvReleaseImage ( &image );
+ return floatingImage;
+}
+
+int mainTextDetection ( int argc, char * * argv )
+{
+ IplImage * byteQueryImage = loadByteImage ( argv[1] );
+ if ( !byteQueryImage )
+ {
+ printf ( "couldn't load query image\n" );
+ return -1;
+ }
+
+ // Detect text in the image
+ IplImage * output = textDetection ( byteQueryImage, atoi(argv[3]) );
+ cvReleaseImage ( &byteQueryImage );
+ cvSaveImage ( argv[2], output );
+ cvReleaseImage ( &output );
+ return 0;
+}
+
+int main ( int argc, char * * argv )
+{
+ if ( ( argc != 4 ) )
+ {
+ printf ( "usage: %s imagefile resultImage darkText\n",
+ argv[0] );
+
+ return -1;
+ }
+ return mainTextDetection ( argc, argv );
+}

README

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+DetectText
+==========
+
+Detect text with stroke width transform.
+
+Dependencies: OpenCV, boost.
+
+To compile:
+g++ -o TextDetection FeaturesMain.cpp TextDetection.cpp -Ipath_to_current_directory
+where path_to_current_directory is replaced with the path to the current directory.
+
+To run:
+./TextDetection input_file output_file dark_on_light
+where dark_on_light is 1 or 0, indicating whether the text is darker or lighter than the background.
+
+GitHub repository:
+https://github.com/aperrau/DetectText
+
+A similar implementation can be found here:
+https://github.com/mfarre/textdetection
+
+More details on the algorithm can be found in:
+http:https://www.cs.cornell.edu/courses/cs4670/2010fa/projects/final/results/group_of_arp86_sk2357/Writeup.pdf