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#include "cv.h"
#include "imagestorage.h"
#include <stdio.h>
#include <iostream>
#include <fstream>
bool CvCascadeImageReader::create( const String _posFilename, const String _negFilename, Size _winSize )
{
return posReader.create(_posFilename) && negReader.create(_negFilename, _winSize);
}
CvCascadeImageReader::NegReader::NegReader()
{
src.create( 0, 0 , CV_8UC1 );
img.create( 0, 0, CV_8UC1 );
point = offset = Point( 0, 0 );
scale = 1.0F;
scaleFactor = 1.4142135623730950488016887242097F;
stepFactor = 0.5F;
}
bool CvCascadeImageReader::NegReader::create( const String _filename, Size _winSize )
{
String dirname, str;
std::ifstream file(_filename.c_str());
if ( !file.is_open() )
return false;
size_t pos = _filename.rfind('\\');
char dlmrt = '\\';
if (pos == String::npos)
{
pos = _filename.rfind('/');
dlmrt = '/';
}
dirname = pos == String::npos ? "" : _filename.substr(0, pos) + dlmrt;
while( !file.eof() )
{
std::getline(file, str);
if (str.empty()) break;
if (str.at(0) == '#' ) continue; /* comment */
imgFilenames.push_back(dirname + str);
}
file.close();
winSize = _winSize;
last = round = 0;
return true;
}
bool CvCascadeImageReader::NegReader::nextImg()
{
Point _offset = Point(0,0);
size_t count = imgFilenames.size();
for( size_t i = 0; i < count; i++ )
{
src = imread( imgFilenames[last++], 0 );
if( src.empty() )
continue;
round += last / count;
round = round % (winSize.width * winSize.height);
last %= count;
_offset.x = min( (int)round % winSize.width, src.cols - winSize.width );
_offset.y = min( (int)round / winSize.width, src.rows - winSize.height );
if( !src.empty() && src.type() == CV_8UC1
&& offset.x >= 0 && offset.y >= 0 )
break;
}
if( src.empty() )
return false; // no appropriate image
point = offset = _offset;
scale = max( ((float)winSize.width + point.x) / ((float)src.cols),
((float)winSize.height + point.y) / ((float)src.rows) );
Size sz( (int)(scale*src.cols + 0.5F), (int)(scale*src.rows + 0.5F) );
resize( src, img, sz );
return true;
}
bool CvCascadeImageReader::NegReader::get( Mat& _img )
{
CV_Assert( !_img.empty() );
CV_Assert( _img.type() == CV_8UC1 );
CV_Assert( _img.cols == winSize.width );
CV_Assert( _img.rows == winSize.height );
if( img.empty() )
if ( !nextImg() )
return false;
Mat mat( winSize.height, winSize.width, CV_8UC1,
(void*)(img.data + point.y * img.step + point.x * img.elemSize()), img.step );
mat.copyTo(_img);
if( (int)( point.x + (1.0F + stepFactor ) * winSize.width ) < img.cols )
point.x += (int)(stepFactor * winSize.width);
else
{
point.x = offset.x;
if( (int)( point.y + (1.0F + stepFactor ) * winSize.height ) < img.rows )
point.y += (int)(stepFactor * winSize.height);
else
{
point.y = offset.y;
scale *= scaleFactor;
if( scale <= 1.0F )
resize( src, img, Size( (int)(scale*src.cols), (int)(scale*src.rows) ) );
else
{
if ( !nextImg() )
return false;
}
}
}
return true;
}
CvCascadeImageReader::PosReader::PosReader()
{
file = 0;
vec = 0;
}
bool CvCascadeImageReader::PosReader::create( const String _filename )
{
if ( file )
fclose( file );
file = fopen( _filename.c_str(), "rb" );
if( !file )
return false;
short tmp = 0;
if( fread( &count, sizeof( count ), 1, file ) != 1 ||
fread( &vecSize, sizeof( vecSize ), 1, file ) != 1 ||
fread( &tmp, sizeof( tmp ), 1, file ) != 1 ||
fread( &tmp, sizeof( tmp ), 1, file ) != 1 )
CV_Error_( CV_StsParseError, ("wrong file format for %s\n", _filename.c_str()) );
base = sizeof( count ) + sizeof( vecSize ) + 2*sizeof( tmp );
if( feof( file ) )
return false;
last = 0;
vec = (short*) cvAlloc( sizeof( *vec ) * vecSize );
CV_Assert( vec );
return true;
}
bool CvCascadeImageReader::PosReader::get( Mat &_img )
{
CV_Assert( _img.rows * _img.cols == vecSize );
uchar tmp = 0;
fread( &tmp, sizeof( tmp ), 1, file );
fread( vec, sizeof( vec[0] ), vecSize, file );
if( feof( file ) || last++ >= count )
return false;
for( int r = 0; r < _img.rows; r++ )
{
for( int c = 0; c < _img.cols; c++ )
_img.ptr(r)[c] = (uchar)vec[r * _img.cols + c];
}
return true;
}
void CvCascadeImageReader::PosReader::restart()
{
CV_Assert( file );
last = 0;
fseek( file, base, SEEK_SET );
}
CvCascadeImageReader::PosReader::~PosReader()
{
if (file)
fclose( file );
cvFree( &vec );
}
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