/**
* Generates a CSV formatted string of steganalysis information.
* <P>
* The directory passed has all it's image files steganalysed and
* the results are returned in a comma separated file format. No spaces
* are used in column headings, and all bar the steganography type are
* numerical values.
*
* @param directory The directory to steganalyse.
* @param laplacelimit The number of laplace values to write out in total.
* @return A string containing a csv file of results.
*/
public string GetCSV(string directory, int laplacelimit)
{
//output progress to console
Console.WriteLine("\n\nCSV Progress: {");
var files = Directory.GetFiles(directory);
var fivepercent = (int) Math.Floor((double) files.Length/20);
var csv = new StringBuilder();
//add all the headings
if (mRunRsAnalysis)
{
var rsa = new RsAnalysis(2, 2);
var rflag = "(rs overlapping)";
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
IEnumerable<string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag + ",";
towrite = towrite.Replace(' ', '-');
csv.Append(towrite);
}
}
//non overlapping
rflag = "(rs non-overlapping)";
for (var i = 0; i < 3; i++)
{
IEnumerable<string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag + ",";
towrite = towrite.Replace(' ', '-');
csv.Append(towrite);
}
}
}
if (mRunSamplePairs)
{
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
//get the right colour
if (i == 0)
{
colour = "-red-";
}
else if (i == 1)
{
colour = "-green-";
}
else
{
colour = "-blue-";
}
csv.Append("SP-Percentage" + colour + ",");
csv.Append("SP-Approximate-Bytes" + colour + ",");
}
}
if (mRunLaplaceGraph)
{
for (var i = 0; i < laplacelimit; i++)
{
csv.Append("Laplace-value-" + i + ",");
}
}
csv.Append("Steganography-Type,Image-Name\n");
//check all the files
for (var i = 0; i < files.Length; i++)
{
//print progress
if (i > 0 && fivepercent > 0)
{
if (i%fivepercent == 0)
{
Console.WriteLine("#");
}
}
if (files[i].EndsWith(".bmp") || files[i].EndsWith(".png")
|| files[i].EndsWith(".jpg"))
{
//file can be worked on.
string flag;
try
{
using (var bitmap = new Bitmap(files[i]))
{
var image = new LockBitmap(bitmap);
image.LockBits();
//run RS analysis
if (mRunRsAnalysis)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, true);
for (var k = 0; k < testresults.Length; k++)
{
csv.Append(testresults[k] + ",");
}
}
//non-overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, false);
for (var k = 0; k < testresults.Length; k++)
{
csv.Append(testresults[k] + ",");
}
}
}
//run Sample Pairs
if (mRunSamplePairs)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var sp = new SamplePairs();
var estimatedlength = sp.DoAnalysis(image, j);
var numbytes = image.Height*image.Width*3/8
*estimatedlength;
csv.Append(estimatedlength + "," + numbytes + ",");
}
}
//run LaplaceGraph
if (mRunLaplaceGraph)
{
var lgres = LaplaceGraph.GetGraph(image);
for (var j = 0; j < laplacelimit; j++)
{
if (lgres.Length <= laplacelimit && j >= lgres.Length)
{
csv.Append("0,");
}
else
{
if (lgres[j][0] != j)
{
csv.Append("0,");
}
else
{
csv.Append(lgres[j][1] + ",");
}
}
}
}
if (files[i].IndexOf("_") >= 0 || files[i].IndexOf("-") >= 0)
{
if (files[i].IndexOf("_") >= 0)
{
flag = files[i].Substring(files[i].IndexOf("_") + 1, files[i].LastIndexOf("."));
}
else
{
flag = files[i].Substring(files[i].IndexOf("-") + 1, files[i].LastIndexOf("."));
}
}
else
{
flag = "none";
}
csv.Append(flag);
//Append in the file name
csv.Append("," + files[i]);
if (csv[csv.Length - 1] == ',')
{
csv.Remove(csv.Length - 1, 1);
}
csv.Append("\n");
image.UnlockBits();
}
}
catch (Exception)
{
//skip the file...
}
//cleanup to speed up memory
GC.Collect();
}
}
//all done
Console.WriteLine("} Complete!");
csv.Append("\n");
return csv.ToString();
}
/**
* Creates an ARFF file of steganography information.
* <P>
* An ARFF file is the natural internal format for WEKA - Waikato
* Environment for Knowledge Analysis. WEKA can also handle CSV
* files but it is much nicer to be able to produce the natural format.
* The same information as per the CSV generator is produced here, just
* in a different format.
*
* @param directory The directory to steganalyse.
* @param laplacelimit The maximum number of laplace values to output.
* @param relationname The internal name of the relation as it will be
* seen in WEKA.
* @return An ARFF formatted file full of the steganalysis information.
* @see www.cs.waikato.ac.nz/ml/weka
*
*/
public string GetARFF(string directory, int laplacelimit, string relationname)
{
var arff = new StringBuilder();
//output progress to console
Console.WriteLine("\n\nARFF Progress: {");
var files = Directory.GetFiles(directory);
var fivepercent = (int)Math.Floor((double)files.Length / 20);
arff.Append("% Steganography Benchmarking Data\n%\n");
arff.Append("% Sourced from automatic generation in Digital Invisible Ink Toolkit\n");
arff.Append("% Generator created by Kathryn Hempstalk.\n");
arff.Append("% Generator copyright under the Gnu General Public License, 2005\n");
arff.Append("\n");
arff.Append("\n@relation '" + relationname + "'\n\n");
//add all the headings
if (mRunRsAnalysis)
{
var rsa = new RsAnalysis(2, 2);
var rflag = "(rs overlapping)";
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
IEnumerable <string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag;
arff.Append("@attribute '" + towrite + "' numeric\n");
}
}
//non overlapping
rflag = "(rs non-overlapping)";
for (var i = 0; i < 3; i++)
{
IEnumerable <string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag;
arff.Append("@attribute '" + towrite + "' numeric\n");
}
}
}
if (mRunSamplePairs)
{
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
arff.Append("@attribute 'SP Percentage" + colour + "' numeric\n");
arff.Append("@attribute 'SP Approximate Bytes" + colour + "' numeric\n");
}
}
if (mRunLaplaceGraph)
{
for (var i = 0; i < laplacelimit; i++)
{
arff.Append("@attribute 'Laplace value " + i + "' numeric\n");
}
}
arff.Append("@attribute 'Steganography Type' {");
//iterate through all the hashmap values...
var stegotypes = GetStegTypes(Directory.GetFiles(directory));
var valuesarray = stegotypes.Values.ToArray();
arff.Append(valuesarray[0]);
for (var i = 1; i < valuesarray.Length; i++)
{
arff.Append("," + valuesarray[i]);
}
arff.Append("}\n");
arff.Append("@attribute 'Image Name' string\n");
arff.Append("\n@data\n");
//check all the files
for (var i = 0; i < files.Length; i++)
{
//print progress
if (i > 0 && fivepercent > 0)
{
if (i % fivepercent == 0 && i != 0)
{
Console.WriteLine("#");
}
}
if (files[i].EndsWith(".bmp") || files[i].EndsWith(".png") ||
files[i].EndsWith(".jpg"))
{
//file can be worked on.
try
{
using (var bitmap = new Bitmap(files[i]))
{
var image = new LockBitmap(bitmap);
image.LockBits();
//run RS analysis
if (mRunRsAnalysis)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, true);
for (var k = 0; k < testresults.Length; k++)
{
arff.Append(testresults[k] + ",");
}
}
//non-overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, false);
for (var k = 0; k < testresults.Length; k++)
{
arff.Append(testresults[k] + ",");
}
}
}
//run Sample Pairs
if (mRunSamplePairs)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var sp = new SamplePairs();
var estimatedlength = sp.DoAnalysis(image, j);
var numbytes = image.Height * image.Width * 3 / 8
* (estimatedlength / 100);
arff.Append(estimatedlength + "," + numbytes + ",");
}
}
//run LaplaceGraph
if (mRunLaplaceGraph)
{
var lgres = LaplaceGraph.GetGraph(image);
for (var j = 0; j < laplacelimit; j++)
{
if (lgres.Length <= laplacelimit && j >= lgres.Length)
{
arff.Append("0,");
}
else
{
if (lgres[j][0] != j)
{
arff.Append("0,");
}
else
{
arff.Append(lgres[j][1] + ",");
}
}
}
}
string flag;
if (files[i].IndexOf("_") >= 0 || files[i].IndexOf("-") >= 0)
{
if (files[i].IndexOf("_") >= 0)
{
flag = files[i].Substring(files[i].IndexOf("_") + 1, files[i].LastIndexOf("."));
}
else
{
flag = files[i].Substring(files[i].IndexOf("-") + 1, files[i].LastIndexOf("."));
}
}
else
{
flag = "none";
}
arff.Append(flag);
arff.Append("," + files[i]);
if (arff[arff.Length - 1] == ',')
{
arff.Remove(arff.Length - 1, 1);
}
arff.Append("\n");
image.UnlockBits();
}
}
catch (Exception)
{
//skip the file...
}
//cleanup to speed up memory
GC.Collect();
}
}
//all done
Console.WriteLine("} Complete!");
return(arff.ToString());
}
/**
* Creates an ARFF file of steganography information.
* <P>
* An ARFF file is the natural internal format for WEKA - Waikato
* Environment for Knowledge Analysis. WEKA can also handle CSV
* files but it is much nicer to be able to produce the natural format.
* The same information as per the CSV generator is produced here, just
* in a different format.
*
* @param directory The directory to steganalyse.
* @param laplacelimit The maximum number of laplace values to output.
* @param relationname The internal name of the relation as it will be
* seen in WEKA.
* @return An ARFF formatted file full of the steganalysis information.
* @see www.cs.waikato.ac.nz/ml/weka
*
*/
public string GetARFF(string directory, int laplacelimit, string relationname)
{
var arff = new StringBuilder();
//output progress to console
Console.WriteLine("\n\nARFF Progress: {");
var files = Directory.GetFiles(directory);
var fivepercent = (int) Math.Floor((double) files.Length/20);
arff.Append("% Steganography Benchmarking Data\n%\n");
arff.Append("% Sourced from automatic generation in Digital Invisible Ink Toolkit\n");
arff.Append("% Generator created by Kathryn Hempstalk.\n");
arff.Append("% Generator copyright under the Gnu General Public License, 2005\n");
arff.Append("\n");
arff.Append("\n@relation '" + relationname + "'\n\n");
//add all the headings
if (mRunRsAnalysis)
{
var rsa = new RsAnalysis(2, 2);
var rflag = "(rs overlapping)";
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
IEnumerable<string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag;
arff.Append("@attribute '" + towrite + "' numeric\n");
}
}
//non overlapping
rflag = "(rs non-overlapping)";
for (var i = 0; i < 3; i++)
{
IEnumerable<string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag;
arff.Append("@attribute '" + towrite + "' numeric\n");
}
}
}
if (mRunSamplePairs)
{
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
arff.Append("@attribute 'SP Percentage" + colour + "' numeric\n");
arff.Append("@attribute 'SP Approximate Bytes" + colour + "' numeric\n");
}
}
if (mRunLaplaceGraph)
{
for (var i = 0; i < laplacelimit; i++)
{
arff.Append("@attribute 'Laplace value " + i + "' numeric\n");
}
}
arff.Append("@attribute 'Steganography Type' {");
//iterate through all the hashmap values...
var stegotypes = GetStegTypes(Directory.GetFiles(directory));
var valuesarray = stegotypes.Values.ToArray();
arff.Append(valuesarray[0]);
for (var i = 1; i < valuesarray.Length; i++)
{
arff.Append("," + valuesarray[i]);
}
arff.Append("}\n");
arff.Append("@attribute 'Image Name' string\n");
arff.Append("\n@data\n");
//check all the files
for (var i = 0; i < files.Length; i++)
{
//print progress
if (i > 0 && fivepercent > 0)
{
if (i%fivepercent == 0 && i != 0)
{
Console.WriteLine("#");
}
}
if (files[i].EndsWith(".bmp") || files[i].EndsWith(".png")
|| files[i].EndsWith(".jpg"))
{
//file can be worked on.
try
{
using (var bitmap = new Bitmap(files[i]))
{
var image = new LockBitmap(bitmap);
image.LockBits();
//run RS analysis
if (mRunRsAnalysis)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, true);
for (var k = 0; k < testresults.Length; k++)
{
arff.Append(testresults[k] + ",");
}
}
//non-overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, false);
for (var k = 0; k < testresults.Length; k++)
{
arff.Append(testresults[k] + ",");
}
}
}
//run Sample Pairs
if (mRunSamplePairs)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var sp = new SamplePairs();
var estimatedlength = sp.DoAnalysis(image, j);
var numbytes = image.Height*image.Width*3/8
*(estimatedlength/100);
arff.Append(estimatedlength + "," + numbytes + ",");
}
}
//run LaplaceGraph
if (mRunLaplaceGraph)
{
var lgres = LaplaceGraph.GetGraph(image);
for (var j = 0; j < laplacelimit; j++)
{
if (lgres.Length <= laplacelimit && j >= lgres.Length)
{
arff.Append("0,");
}
else
{
if (lgres[j][0] != j)
{
arff.Append("0,");
}
else
{
arff.Append(lgres[j][1] + ",");
}
}
}
}
string flag;
if (files[i].IndexOf("_") >= 0 || files[i].IndexOf("-") >= 0)
{
if (files[i].IndexOf("_") >= 0)
{
flag = files[i].Substring(files[i].IndexOf("_") + 1, files[i].LastIndexOf("."));
}
else
{
flag = files[i].Substring(files[i].IndexOf("-") + 1, files[i].LastIndexOf("."));
}
}
else
{
flag = "none";
}
arff.Append(flag);
arff.Append("," + files[i]);
if (arff[arff.Length - 1] == ',')
{
arff.Remove(arff.Length - 1, 1);
}
arff.Append("\n");
image.UnlockBits();
}
}
catch (Exception)
{
//skip the file...
}
//cleanup to speed up memory
GC.Collect();
}
}
//all done
Console.WriteLine("} Complete!");
return arff.ToString();
}
/**
* Generates a CSV formatted string of steganalysis information.
* <P>
* The directory passed has all it's image files steganalysed and
* the results are returned in a comma separated file format. No spaces
* are used in column headings, and all bar the steganography type are
* numerical values.
*
* @param directory The directory to steganalyse.
* @param laplacelimit The number of laplace values to write out in total.
* @return A string containing a csv file of results.
*/
public string GetCSV(string directory, int laplacelimit)
{
//output progress to console
Console.WriteLine("\n\nCSV Progress: {");
var files = Directory.GetFiles(directory);
var fivepercent = (int)Math.Floor((double)files.Length / 20);
var csv = new StringBuilder();
//add all the headings
if (mRunRsAnalysis)
{
var rsa = new RsAnalysis(2, 2);
var rflag = "(rs overlapping)";
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
IEnumerable <string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag + ",";
towrite = towrite.Replace(' ', '-');
csv.Append(towrite);
}
}
//non overlapping
rflag = "(rs non-overlapping)";
for (var i = 0; i < 3; i++)
{
IEnumerable <string> rnames = rsa.GetResultNames();
//get the right colour
if (i == 0)
{
colour = " red ";
}
else if (i == 1)
{
colour = " green ";
}
else
{
colour = " blue ";
}
foreach (var rname in rnames)
{
var aname = rname;
var towrite = aname + colour + rflag + ",";
towrite = towrite.Replace(' ', '-');
csv.Append(towrite);
}
}
}
if (mRunSamplePairs)
{
string colour;
//overlapping
for (var i = 0; i < 3; i++)
{
//get the right colour
if (i == 0)
{
colour = "-red-";
}
else if (i == 1)
{
colour = "-green-";
}
else
{
colour = "-blue-";
}
csv.Append("SP-Percentage" + colour + ",");
csv.Append("SP-Approximate-Bytes" + colour + ",");
}
}
if (mRunLaplaceGraph)
{
for (var i = 0; i < laplacelimit; i++)
{
csv.Append("Laplace-value-" + i + ",");
}
}
csv.Append("Steganography-Type,Image-Name\n");
//check all the files
for (var i = 0; i < files.Length; i++)
{
//print progress
if (i > 0 && fivepercent > 0)
{
if (i % fivepercent == 0)
{
Console.WriteLine("#");
}
}
if (files[i].EndsWith(".bmp") || files[i].EndsWith(".png") ||
files[i].EndsWith(".jpg"))
{
//file can be worked on.
string flag;
try
{
using (var bitmap = new Bitmap(files[i]))
{
var image = new LockBitmap(bitmap);
image.LockBits();
//run RS analysis
if (mRunRsAnalysis)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, true);
for (var k = 0; k < testresults.Length; k++)
{
csv.Append(testresults[k] + ",");
}
}
//non-overlapping
for (var j = 0; j < 3; j++)
{
var rsa = new RsAnalysis(2, 2);
var testresults =
rsa.DoAnalysis(image, j, false);
for (var k = 0; k < testresults.Length; k++)
{
csv.Append(testresults[k] + ",");
}
}
}
//run Sample Pairs
if (mRunSamplePairs)
{
//overlapping
for (var j = 0; j < 3; j++)
{
var sp = new SamplePairs();
var estimatedlength = sp.DoAnalysis(image, j);
var numbytes = image.Height * image.Width * 3 / 8
* estimatedlength;
csv.Append(estimatedlength + "," + numbytes + ",");
}
}
//run LaplaceGraph
if (mRunLaplaceGraph)
{
var lgres = LaplaceGraph.GetGraph(image);
for (var j = 0; j < laplacelimit; j++)
{
if (lgres.Length <= laplacelimit && j >= lgres.Length)
{
csv.Append("0,");
}
else
{
if (lgres[j][0] != j)
{
csv.Append("0,");
}
else
{
csv.Append(lgres[j][1] + ",");
}
}
}
}
if (files[i].IndexOf("_") >= 0 || files[i].IndexOf("-") >= 0)
{
if (files[i].IndexOf("_") >= 0)
{
flag = files[i].Substring(files[i].IndexOf("_") + 1, files[i].LastIndexOf("."));
}
else
{
flag = files[i].Substring(files[i].IndexOf("-") + 1, files[i].LastIndexOf("."));
}
}
else
{
flag = "none";
}
csv.Append(flag);
//Append in the file name
csv.Append("," + files[i]);
if (csv[csv.Length - 1] == ',')
{
csv.Remove(csv.Length - 1, 1);
}
csv.Append("\n");
image.UnlockBits();
}
}
catch (Exception)
{
//skip the file...
}
//cleanup to speed up memory
GC.Collect();
}
}
//all done
Console.WriteLine("} Complete!");
csv.Append("\n");
return(csv.ToString());
}