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// Copyright (C) 2011 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_IMAGE_DAtASET_METADATA_CPP__
#define DLIB_IMAGE_DAtASET_METADATA_CPP__
#include "image_dataset_metadata.h"
#include <fstream>
#include <sstream>
#include <dlib/compress_stream.h>
#include <dlib/base64.h>
#include <dlib/xml_parser.h>
#include <dlib/string.h>
// ----------------------------------------------------------------------------------------
namespace dlib
{
namespace image_dataset_metadata
{
// ------------------------------------------------------------------------------------
const std::string get_decoded_string();
void create_image_metadata_stylesheet_file(const std::string& main_filename)
{
std::string path;
std::string::size_type pos = main_filename.find_last_of("/\\");
if (pos != std::string::npos)
path = main_filename.substr(0,pos+1);
std::ofstream fout((path + "image_metadata_stylesheet.xsl").c_str());
if (!fout)
throw dlib::error("ERROR: Unable to open image_metadata_stylesheet.xsl for writing.");
fout << get_decoded_string();
if (!fout)
throw dlib::error("ERROR: Unable to write to image_metadata_stylesheet.xsl.");
}
void save_image_dataset_metadata (
const dataset& meta,
const std::string& filename
)
{
create_image_metadata_stylesheet_file(filename);
const std::vector<image>& images = meta.images;
std::ofstream fout(filename.c_str());
if (!fout)
throw dlib::error("ERROR: Unable to open " + filename + " for writing.");
fout << "<?xml version='1.0' encoding='ISO-8859-1'?>\n";
fout << "<?xml-stylesheet type='text/xsl' href='image_metadata_stylesheet.xsl'?>\n";
fout << "<dataset>\n";
fout << "<name>" << meta.name << "</name>\n";
fout << "<comment>" << meta.comment << "</comment>\n";
fout << "<images>\n";
for (unsigned long i = 0; i < images.size(); ++i)
{
fout << " <image file='" << images[i].filename << "'>\n";
// save all the boxes
for (unsigned long j = 0; j < images[i].boxes.size(); ++j)
{
const box& b = images[i].boxes[j];
fout << " <box top='" << b.rect.top() << "' "
<< "left='" << b.rect.left() << "' "
<< "width='" << b.rect.width() << "' "
<< "height='" << b.rect.height() << "'";
if (b.difficult)
fout << " difficult='" << b.difficult << "'";
if (b.truncated)
fout << " truncated='" << b.truncated << "'";
if (b.occluded)
fout << " occluded='" << b.occluded << "'";
if (b.has_label() || b.has_head())
{
fout << ">\n";
if (b.has_label())
fout << " <label>" << b.label << "</label>\n";
if (b.has_head())
fout << " <head x='"<< b.head.x() <<"' y='"<< b.head.y() <<"'/>\n";
fout << " </box>\n";
}
else
{
fout << "/>\n";
}
}
fout << " </image>\n";
if (!fout)
throw dlib::error("ERROR: Unable to write to " + filename + ".");
}
fout << "</images>\n";
fout << "</dataset>";
}
// ------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------
class doc_handler : public document_handler
{
std::vector<std::string> ts;
image temp_image;
box temp_box;
dataset& meta;
public:
doc_handler(
dataset& metadata_
):
meta(metadata_)
{}
virtual void start_document (
)
{
meta = dataset();
ts.clear();
temp_image = image();
temp_box = box();
}
virtual void end_document (
)
{
}
virtual void start_element (
const unsigned long ,
const std::string& name,
const dlib::attribute_list& atts
)
{
if (ts.size() == 0)
{
if (name != "dataset")
{
std::ostringstream sout;
sout << "Invalid XML document. Root tag must be <dataset>. Found <" << name << "> instead.";
throw dlib::error(sout.str());
}
else
{
ts.push_back(name);
return;
}
}
if (name == "box")
{
if (atts.is_in_list("top")) temp_box.rect.top() = sa = atts["top"];
else throw dlib::error("<box> missing required attribute 'top'");
if (atts.is_in_list("left")) temp_box.rect.left() = sa = atts["left"];
else throw dlib::error("<box> missing required attribute 'left'");
if (atts.is_in_list("width")) temp_box.rect.right() = sa = atts["width"];
else throw dlib::error("<box> missing required attribute 'width'");
if (atts.is_in_list("height")) temp_box.rect.bottom() = sa = atts["height"];
else throw dlib::error("<box> missing required attribute 'height'");
if (atts.is_in_list("difficult")) temp_box.difficult = sa = atts["difficult"];
if (atts.is_in_list("truncated")) temp_box.truncated = sa = atts["truncated"];
if (atts.is_in_list("occluded")) temp_box.occluded = sa = atts["occluded"];
temp_box.rect.bottom() += temp_box.rect.top()-1;
temp_box.rect.right() += temp_box.rect.left()-1;
}
else if (name == "head" && ts.back() == "box")
{
if (atts.is_in_list("x")) temp_box.head.x() = sa = atts["x"];
else throw dlib::error("<head> missing required attribute 'x'");
if (atts.is_in_list("y")) temp_box.head.y() = sa = atts["y"];
else throw dlib::error("<head> missing required attribute 'y'");
}
else if (name == "image")
{
temp_image.boxes.clear();
if (atts.is_in_list("file")) temp_image.filename = atts["file"];
else throw dlib::error("<image> missing required attribute 'file'");
}
ts.push_back(name);
}
virtual void end_element (
const unsigned long ,
const std::string& name
)
{
ts.pop_back();
if (ts.size() == 0)
return;
if (name == "box" && ts.back() == "image")
{
temp_image.boxes.push_back(temp_box);
temp_box = box();
}
else if (name == "image" && ts.back() == "images")
{
meta.images.push_back(temp_image);
temp_image = image();
}
}
virtual void characters (
const std::string& data
)
{
if (ts.size() == 2 && ts[1] == "name")
{
meta.name = trim(data);
}
else if (ts.size() == 2 && ts[1] == "comment")
{
meta.comment = trim(data);
}
else if (ts.size() >= 2 && ts[ts.size()-1] == "label" &&
ts[ts.size()-2] == "box")
{
temp_box.label = trim(data);
}
}
virtual void processing_instruction (
const unsigned long ,
const std::string& ,
const std::string&
)
{
}
};
// ----------------------------------------------------------------------------------------
class xml_error_handler : public error_handler
{
public:
virtual void error (
const unsigned long
) { }
virtual void fatal_error (
const unsigned long line_number
)
{
std::ostringstream sout;
sout << "There is a fatal error on line " << line_number << " so parsing will now halt.";
throw dlib::error(sout.str());
}
};
// ------------------------------------------------------------------------------------
void load_image_dataset_metadata (
dataset& meta,
const std::string& filename
)
{
xml_error_handler eh;
doc_handler dh(meta);
std::ifstream fin(filename.c_str());
if (!fin)
throw dlib::error("ERROR: unable to open " + filename + " for reading.");
xml_parser::kernel_1a parser;
parser.add_document_handler(dh);
parser.add_error_handler(eh);
parser.parse(fin);
}
// ------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------
// This function returns the contents of the file 'images.xsl'
const std::string get_decoded_string()
{
dlib::base64 base64_coder;
dlib::compress_stream::kernel_1ea compressor;
std::ostringstream sout;
std::istringstream sin;
// The base64 encoded data from the file 'image_metadata_stylesheet.xsl' we want to decode and return.
sout << "PFWfgmWfCHr1DkV63lbjjeY2dCc2FbHDOVh0Kd7dkvaOfRYrOG24f0x77/5iMVq8FtE3UBxtGwSd";
sout << "1ZHOHRSHgieNoeBv8ssJQ75RRxYtFKRY3OTPX5eKQoCN9jUaUnHnR4QZtEHgmKqXSs50Yrdd+2Ah";
sout << "gNyarPZCiR6nvqNvCjtP2MP5FxleqNf8Fylatm2KdsXmrv5K87LYVN7i7JMkmZ++cTXYSOxDmxZi";
sout << "OiCH8funXUdF9apDW547gCjz9HOQUI6dkz5dYUeFjfp6dFugpnaJyyprFLKq048Qk7+QiL4CNF/G";
sout << "7e0VpBw8dMpiyRNi2fSQGSZGfIAUQKKT6+rPwQoRH2spdjsdXVWj4XQAqBX87nmqMnqjMhn/Vd1s";
sout << "W5aoC0drwRGu3Xe3gn9vBL8hBkRXcKndVwPFMPUeADJ2Z2tc8cb9MqwkOCPBKdfQ+w24u/kvjdsQ";
sout << "Kq20+MI2uPOSGbCebui/yMveNYUeot5b4s+ZyRIdcbURUHlQQ68BZQVj0WTw+8ohK7VUpjidF/T+";
sout << "gawZzSnr/HrocEedQL7DyjyVuC03qoFGlwe6Q/4ynndgscVhXyVleneSpOlx/CGOlBKXzwyEpEi8";
sout << "JV4kPhoJ21N5va7iyDgxuikbDT94tFYje9GtXQOPGPERKzxnp6dCor3a5dPLOfmVsvAdEDtr7B3e";
sout << "WJpFbfD4XtFfllWmwxggCqyfvz/q7kMQzhsH623CLRDre9AsIRg830e6T992uKgtXx8QM4GPhsjc";
sout << "leFCNzwDqpeORW7oJ72COj3pgGIn2/BGDWrr1oqu0ACKy7vY32VcgvyFcWbqqdEX71SQ9LcxCbet";
sout << "iwrBJY8n//Whq55kD0hpSffmW+uup6sV8sbAI7rwnCYpfUNQHXgN+5sLot67jhO03FlafaEmrgfT";
sout << "XKjBU+z64tCCy1uwJj8gx0CBVFhr8MPzGkKp3rAaeKzVYZJbC2TkZPL+PMjohL0SDhaXxiwX+pKo";
sout << "VHNRqCmlnrxmB6kikuS5zN5Z6feHW6KNhhcEKuXvDawYNlppJvMt1lE0Q9oKx+JL3Atlm+V8/Q2R";
sout << "fI5DQAaCaxMXdzJcDfNPMHOIcYlkQPIk9cdLqScrbFu9VjFpqGyGoTGOUiiJP4d3peJvEbRgZZ8d";
sout << "SUaF4cycZh4yRSI06rrTGi3wyS5HjRFgS+giS2p0ZUi+7YAt1opbkDhcovTxZGUkuavZBCsjZw3C";
sout << "1CNGurdvhw9mOOL9JY3Vn/wfb9t4ScwaGGrUoeyZHXMARoHYVF1ST7gGOHL2qMRMdXr+k0P3OLxO";
sout << "4DVe0r3v93vpyqd5KgA=";
// Put the data into the istream sin
sin.str(sout.str());
sout.str("");
// Decode the base64 text into its compressed binary form
base64_coder.decode(sin,sout);
sin.clear();
sin.str(sout.str());
sout.str("");
// Decompress the data into its original form
compressor.decompress(sin,sout);
// Return the decoded and decompressed data
return sout.str();
}
}
}
// ----------------------------------------------------------------------------------------
#endif // DLIB_IMAGE_DAtASET_METADATA_CPP__