mirror of
https://github.com/opencv/opencv.git
synced 2024-12-16 02:19:12 +08:00
a64b51dd94
Usage of imread(): magic number 0, unchecked result * docs: rewrite 0/1 to IMREAD_GRAYSCALE/IMREAD_COLOR in imread() * samples, apps: rewrite 0/1 to IMREAD_GRAYSCALE/IMREAD_COLOR in imread() * tests: rewrite 0/1 to IMREAD_GRAYSCALE/IMREAD_COLOR in imread() * doc/py_tutorials: check imread() result
187 lines
5.4 KiB
C++
187 lines
5.4 KiB
C++
#include "opencv2/core.hpp"
|
|
#include "opencv2/core/core_c.h"
|
|
#include "opencv2/imgproc.hpp"
|
|
#include "opencv2/imgcodecs.hpp"
|
|
|
|
#include "imagestorage.h"
|
|
#include <stdio.h>
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
using namespace std;
|
|
using namespace cv;
|
|
|
|
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 str;
|
|
std::ifstream file(_filename.c_str());
|
|
if ( !file.is_open() )
|
|
return false;
|
|
|
|
while( !file.eof() )
|
|
{
|
|
std::getline(file, str);
|
|
str.erase(str.find_last_not_of(" \n\r\t")+1);
|
|
if (str.empty()) break;
|
|
if (str.at(0) == '#' ) continue; /* comment */
|
|
imgFilenames.push_back(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++], IMREAD_GRAYSCALE );
|
|
if( src.empty() ){
|
|
last %= count;
|
|
continue;
|
|
}
|
|
round += last / count;
|
|
round = round % (winSize.width * winSize.height);
|
|
last %= count;
|
|
|
|
_offset.x = std::min( (int)round % winSize.width, src.cols - winSize.width );
|
|
_offset.y = std::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, 0, 0, INTER_LINEAR_EXACT );
|
|
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.ptr(point.y) + 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) ), 0, 0, INTER_LINEAR_EXACT );
|
|
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;
|
|
size_t elements_read = fread( &tmp, sizeof( tmp ), 1, file );
|
|
if( elements_read != 1 )
|
|
CV_Error( CV_StsBadArg, "Can not get new positive sample. The most possible reason is "
|
|
"insufficient count of samples in given vec-file.\n");
|
|
elements_read = fread( vec, sizeof( vec[0] ), vecSize, file );
|
|
if( elements_read != (size_t)(vecSize) )
|
|
CV_Error( CV_StsBadArg, "Can not get new positive sample. Seems that vec-file has incorrect structure.\n");
|
|
|
|
if( feof( file ) || last++ >= count )
|
|
CV_Error( CV_StsBadArg, "Can not get new positive sample. vec-file is over.\n");
|
|
|
|
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 );
|
|
}
|