private void loadImage_Click(object sender, EventArgs e)
{
loadDialog.FileName = "*.*";
DialogResult res = loadDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
if (image != null)
{
image.Dispose();
}
string ext = Path.GetExtension(loadDialog.FileName);
if (ext == ".png" || ext == ".bmp" || ext == ".jpg")
{
try
{
image = Image.FromFile(loadDialog.FileName);
imageBox.Image = image;
OutputConsole.Write(string.Format("Image loaded \nTotal pixels = {0}", image.Width * image.Height));
OutputConsole.Write(string.Format("Maximum file size for this image = {0} - (file size digits + file name character count) bytes", FileSizeFormatProvider.GetFileSize((image.Width * image.Height) - 2)));
currentMode = Mode.Image;
audio = null;
audioLabel.Visible = false;
}
catch
{
image = null;
imageBox.Image = null;
}
}
}
}
private void linear_CheckedChanged(object sender, EventArgs e)
{
if (linear.Checked)
{
OutputConsole.Write("Using linear steganography algorithm (Fastest)");
}
}
private void loadWavFile_Click(object sender, EventArgs e)
{
DialogResult res = loadWav.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
audio = File.ReadAllBytes(loadWav.FileName);
WavAudio wav = new WavAudio(audio);
if (wav.data != null)
{
OutputConsole.Write(string.Format("Audio loaded \nSamples found: {0}", wav.totalSamples));
OutputConsole.Write(string.Format("Maximum file size for this file = {0} - (file size digits + file name character count) bytes", FileSizeFormatProvider.GetFileSize(wav.bytesAvailable)));
currentMode = Mode.Audio;
if (image != null)
{
image.Dispose();
}
image = null;
imageBox.Image = null;
audioLabel.Text = string.Format("Using Wav File: {0}", loadWav.SafeFileName);
audioLabel.Visible = true;
}
else
{
audio = null;
}
}
}
private static void EncodeMessageLinear(ref Bitmap img, string text)
{
int maxLinear = img.Width * img.Height;
string pass = string.Format("{0}x{1}={2}", img.Width, img.Height, maxLinear);
AESEncrypt encrypt = new AESEncrypt();
int c = 0;
string encrypted = encrypt.EncryptString(text, pass);
OutputConsole.Write(string.Format("Text encrypted \n{0}", encrypted));
OutputConsole.Write("Processing image...");
if (encrypted.Length < maxLinear)
{
for (int i = 0; i < encrypted.Length; i++)
{
Point point = LinearIndexToPoint(i, img.Width, img.Height);
Color pixel = img.GetPixel(point.X, point.Y);
char letter = encrypted[i];
int value = Convert.ToInt32(letter);
Color n = EncodePixel(pixel, value);
img.SetPixel(point.X, point.Y, n);
c = i;
}
//Null value placed at the end to indicate end of text - or using 255 for better hiding
Point pointEnd = LinearIndexToPoint(c, img.Width, img.Height);
Color pixelEnd = img.GetPixel(pointEnd.X, pointEnd.Y);
img.SetPixel(pointEnd.X, pointEnd.Y, EncodePixel(pixelEnd, 0));
OutputConsole.Write("Finished embedding encrypted text");
}
else
{
OutputConsole.Write("Error: Image size doesn't support encrypted text size");
img = null;
}
}
public static string GetDecryptedTextFromImageLinear(Image image)
{
Bitmap img = new Bitmap(image);
int maxLinear = image.Width * image.Height;
string pass = string.Format("{0}x{1}={2}", image.Width, image.Height, maxLinear);
AESEncrypt encrypt = new AESEncrypt();
string text = string.Empty;
int value = 0;
int i = 0;
OutputConsole.Write("Processing image...");
do
{
Point point = LinearIndexToPoint(i, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
i++;
if (value != 255)
{
text += Convert.ToChar(value);
}
} while (value != 255);
try
{
OutputConsole.Write(string.Format("String found: \n{0}", text));
OutputConsole.Write("Decrypting text...");
return(encrypt.DecryptString(text, pass));
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return(null);
}
}
private void random_CheckedChanged(object sender, EventArgs e)
{
if (random.Checked)
{
OutputConsole.Write("Using random steganography algorithm (Requires prime number generation, slow for huge images/wav files, once the generator has reached the needed number it can process files quickly)");
}
//OutputConsole.Write("Using random steganography algorithm (Not recommended for huge files or text near 60% image pixels or more than 10% of available bytes in wav files)");
}
private void randomM2_CheckedChanged(object sender, EventArgs e)
{
//Removed
if (randomM2.Checked)
{
OutputConsole.Write("Using random method 2 steganography algorithm (Poor performance on small files, but better performance than random using bigger files) \nWorks only with files...");
}
}
public Form1()
{
InitializeComponent();
OutputConsole.Bind(console);
random.Checked = true;
currentMode = Mode.Image;
stopwatch = new Stopwatch();
}
private void encryptButton_Click(object sender, EventArgs e)
{
if (currentMode == Mode.Image && image != null)
{
Bitmap encrypted;
if (random.Checked || randomM2.Checked)
{
encrypted = Test1.InsertEncryptedTextToImage(image, textBox.Text);
}
else
{
encrypted = Test1.InsertEncryptedTextToImageLinear(image, textBox.Text);
}
if (encrypted != null)
{
saveDialog.FileName = "*.*";
DialogResult res = saveDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
encrypted.Save(saveDialog.FileName);
OutputConsole.Write("Image saved");
}
}
}
if (currentMode == Mode.Audio && audio != null)
{
byte[] file;
if (random.Checked)
{
file = AudioSteganography.EncryptText(audio, textBox.Text);
}
else
{
file = AudioSteganography.EncryptTextLinear(audio, textBox.Text);
}
if (file != null)
{
DialogResult res = saveWav.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllBytes(saveWav.FileName, file);
OutputConsole.Write("Wav file saved");
}
}
}
}
public static byte[] EncryptTextLinear(byte[] wav, string text)
{
WavAudio audio = new WavAudio(wav);
uint value = 0;
string pass = string.Format(audio.bitsPerSample.ToString());
AESEncrypt encrypt = new AESEncrypt();
string encrypted = encrypt.EncryptString(text, pass);
OutputConsole.Write(string.Format("Text encrypted \n{0}", encrypted));
if (encrypted.Length <= Math.Floor((double)(audio.totalSamples / 8)))
{
uint n = 0;
OutputConsole.Write("Seed generated");
OutputConsole.Write("Processing wav file...");
for (int i = 0; i < encrypted.Length; i++)
{
value = encrypted[i];
for (int x = 0; x < 8; x++)
{
uint sample = n;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
n++;
}
}
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = n;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
n++;
}
audio.Save();
OutputConsole.Write(string.Format("Text encrypted... used {0} samples", encrypted.Length * 8));
OutputConsole.Write("Saving wav file");
return(audio.data);
}
else
{
return(null);
}
}
public WavAudio(byte[] data)
{
this.data = data;
Array.Copy(data, 0, header, 0, 0x2E);
channels = BitConverter.ToUInt16(data, 0x16);
bitsPerSample = BitConverter.ToUInt16(data, 0x22);
if (bitsPerSample == 8 || bitsPerSample == 16 || bitsPerSample == 24 || bitsPerSample == 32)
{
totalSamples = (BitConverter.ToUInt32(data, 0x2A) / channels) / (bitsPerSample / 8);
samples = new uint[totalSamples];
int i = 0;
for (int n = 0; n < totalSamples; n++)
{
switch (bitsPerSample)
{
case 8:
samples[n] = data[start + i];
break;
case 16:
default:
samples[n] = BitConverter.ToUInt16(data, start + i);
break;
case 24:
samples[n] = BitConverter.ToUInt32(data, start + i) & 0xFFFFFF;
break;
case 32:
samples[n] = BitConverter.ToUInt32(data, start + i);
break;
}
i += (int)(bitsPerSample / 8);
}
bytesAvailable = (long)Math.Floor((double)(totalSamples / 8));
}
else
{
OutputConsole.Write("This file is incompatible, bits per sample must be 8, 16, 24 or 32");
this.data = null;
}
}
public static List <BigInteger> getPrimes(BigInteger m)
{
if (max < m)
{
IncreaseMax(m);
}
while (index < m)
{
OutputConsole.Write($"Current index:{index}, needed:{m}");
Thread.Sleep(1000);
}
List <BigInteger> list = new List <BigInteger>();
lock (primeList)
{
list = primeList.Where(n => n <= m).ToList();
}
return(list);
}
private void decryptButton_Click(object sender, EventArgs e)
{
if (currentMode == Mode.Image && image != null)
{
string text;
if (random.Checked || randomM2.Checked)
{
text = Test1.GetDecryptedTextFromImage(image);
}
else
{
text = Test1.GetDecryptedTextFromImageLinear(image);
}
if (text != null)
{
textBox.Text = text;
OutputConsole.Write("Text decrypted");
}
else
{
//MessageBox.Show("This image doesn't have an encrypted text or an error occurred");
}
}
if (currentMode == Mode.Audio && audio != null)
{
string text;
if (random.Checked)
{
text = AudioSteganography.DecryptText(audio);
}
else
{
text = AudioSteganography.DecryptTextLinear(audio);
}
if (text != null)
{
textBox.Text = text;
OutputConsole.Write("Text decrypted");
}
}
}
public static string DecryptTextLinear(byte[] wav)
{
WavAudio audio = new WavAudio(wav);
string text = string.Empty;
uint n = 0;
uint value = 0;
string pass = string.Format(audio.bitsPerSample.ToString());
AESEncrypt encrypt = new AESEncrypt();
OutputConsole.Write("Processing wav file...");
do
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = n;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
n++;
}
if (value != 0)
{
text += Convert.ToChar(value);
}
} while (value != 0);
OutputConsole.Write("Decrypting text...");
try
{
return(encrypt.DecryptString(text, pass));
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return(null);
}
}
private void encryptFile_Click(object sender, EventArgs e)
{
if (currentMode == Mode.Image && image != null)
{
loadFileDialog.FileName = "*.*";
DialogResult res = loadFileDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
file = File.ReadAllBytes(loadFileDialog.FileName);
filename = loadFileDialog.SafeFileName;
OutputConsole.Write("Added File to buffer");
Bitmap encrypted;
stopwatch.Restart();
if (random.Checked)
{
encrypted = Test1.InsertFileToImage(image, file, filename);
}
else
{
if (linear.Checked)
{
encrypted = Test1.InsertFileToImageLinear(image, file, filename);
}
else
{
encrypted = Test1.InsertFileToImage2(image, file, filename);
}
}
if (encrypted != null)
{
stopwatch.Stop();
OutputConsole.Write(string.Format("Process completed in {0} ms", stopwatch.ElapsedMilliseconds));
saveDialog.FileName = "*.*";
DialogResult res2 = saveDialog.ShowDialog();
if (res2 == System.Windows.Forms.DialogResult.OK)
{
encrypted.Save(saveDialog.FileName);
OutputConsole.Write("Image saved");
}
}
stopwatch.Reset();
}
}
if (currentMode == Mode.Audio && audio != null)
{
loadFileDialog.FileName = "*.*";
DialogResult res = loadFileDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
byte[] file;
stopwatch.Restart();
if (random.Checked)
{
file = AudioSteganography.EncryptFile(audio, File.ReadAllBytes(loadFileDialog.FileName), loadFileDialog.SafeFileName);
}
else
{
if (linear.Checked)
{
file = AudioSteganography.EncryptFileLinear(audio, File.ReadAllBytes(loadFileDialog.FileName), loadFileDialog.SafeFileName);
}
else
{
file = AudioSteganography.EncryptFile2(audio, File.ReadAllBytes(loadFileDialog.FileName), loadFileDialog.SafeFileName);
}
}
if (file != null)
{
stopwatch.Stop();
OutputConsole.Write(string.Format("Process completed in {0} ms", stopwatch.ElapsedMilliseconds));
DialogResult res2 = saveWav.ShowDialog();
if (res2 == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllBytes(saveWav.FileName, file);
OutputConsole.Write("Wav file saved");
}
}
stopwatch.Reset();
}
}
}
public static HiddenFile GetFileFromImage2(Image image)
{
try
{
Bitmap img = new Bitmap(image);
int maxLinear = image.Width * image.Height;
SeedRNG generator = new SeedRNG((maxLinear + image.Width).GetHashCode(), maxLinear, true);
OutputConsole.Write("Seed generated");
string text = string.Empty;
int value = 0;
//Read file length
OutputConsole.Write("Processing image...");
OutputConsole.Write("Reading metadata...");
do
{
Point point = LinearIndexToPoint(generator.NextN, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
if (value != '#')
{
text += Convert.ToChar(value);
}
} while (value != '#' && char.IsNumber((char)value));
int filelength = int.Parse(text);
OutputConsole.Write(string.Format("Extracted file size: {0} bytes", filelength));
text = string.Empty;
value = 0;
//Read filename
do
{
Point point = LinearIndexToPoint(generator.NextN, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
if (value != 0)
{
text += Convert.ToChar(value);
}
} while (value != 0);
string filename = text;
OutputConsole.Write(string.Format("Extracted file name: {0}", filename));
byte[] file = new byte[filelength];
for (int i = 0; i < filelength; i++)
{
Point point = LinearIndexToPoint(generator.NextN, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
file[i] = (byte)value;
}
OutputConsole.Write(string.Format("Extracted file content"));
HiddenFile f = new HiddenFile(file, filename);
f.cipherFile((maxLinear + img.Width).GetHashCode());
OutputConsole.Write("Ciphering file...");
return(f);
}
catch (Exception e)
{
OutputConsole.Write("Error: File not found");
Console.WriteLine(e.Message);
return(null);
}
}
public static byte[] EncryptFile2(byte[] wav, byte[] file, string filename)
{
WavAudio audio = new WavAudio(wav);
uint value = 0;
int extraBytes = 2 + filename.Length + file.Length.ToString().Length;
HiddenFile f = new HiddenFile(file, filename);
OutputConsole.Write(string.Format("File size: {0} bytes", file.Length));
f.cipherFile((int)audio.totalSamples);
if (file.Length <= Math.Floor((double)(audio.totalSamples / 8)) - extraBytes)
{
SeedURNG generator = new SeedURNG(audio.totalSamples, audio.totalSamples, true);
OutputConsole.Write("Seed generated");
OutputConsole.Write("Ciphering file");
OutputConsole.Write("Processing wav file...");
OutputConsole.Write("Writing metadata...");
//Write file size
for (int i = 0; i < file.Length.ToString().Length; i++)
{
value = file.Length.ToString()[i];
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
}
}
value = '#';
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
}
//Write file name
for (int i = 0; i < filename.Length; i++)
{
value = filename[i];
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
}
}
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
}
//Write file content
OutputConsole.Write("Writing file data...");
for (int i = 0; i < file.Length; i++)
{
value = f.file[i];
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
sampleValue = (sampleValue & 0xFFFFFFFE) | ((value >> x) & 1);
audio.samples[sample] = sampleValue;
}
}
}
else
{
OutputConsole.Write("Error");
return(null);
}
OutputConsole.Write("Finished embedding file");
OutputConsole.Write(string.Format("Used {0} samples", (file.Length + extraBytes) * 8));
audio.Save();
return(audio.data);
}
public static HiddenFile DecryptFile2(byte[] wav)
{
try
{
WavAudio audio = new WavAudio(wav);
string text = string.Empty;
SeedURNG generator = new SeedURNG(audio.totalSamples, audio.totalSamples, true);
OutputConsole.Write("Seed generated");
OutputConsole.Write("Processing wav file...");
OutputConsole.Write("Reading metadata...");
uint value = 0;
do
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
}
if (value != '#')
{
text += Convert.ToChar(value);
}
} while (value != '#' && char.IsNumber((char)value));
int filesize = int.Parse(text);
OutputConsole.Write(string.Format("Extracted file size: {0} bytes", filesize));
text = string.Empty;
do
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
}
if (value != 0)
{
text += Convert.ToChar(value);
}
} while (value != 0);
string filename = text;
OutputConsole.Write(string.Format("Extracted file name: {0}", filename));
byte[] file = new byte[filesize];
for (int i = 0; i < filesize; i++)
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = generator.NextN;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
}
file[i] = (byte)value;
}
OutputConsole.Write(string.Format("Extracted file content"));
HiddenFile f = new HiddenFile(file, filename);
OutputConsole.Write("Ciphering file...");
f.cipherFile((int)audio.totalSamples);
return(f);
}
catch (Exception e)
{
return(null);
}
}
private static void EncodeFileWithColor2(ref Bitmap img, byte[] file, string filename)
{
Bitmap backup = img.Clone() as Bitmap;
int maxLinear = img.Width * img.Height;
OutputConsole.Write(string.Format("File size: {0}", FileSizeFormatProvider.GetFileSize(file.Length)));
SeedRNG generator = new SeedRNG((maxLinear + img.Width).GetHashCode(), maxLinear, true);
OutputConsole.Write("Seed generated");
int extraBytes = 2 + filename.Length + file.Length.ToString().Length;
HiddenFile f = new HiddenFile(file, filename);
f.cipherFile((maxLinear + img.Width).GetHashCode());
OutputConsole.Write("Ciphering file...");
if (file.Length < maxLinear - extraBytes)
{
string fileLength = file.Length.ToString();
OutputConsole.Write("Processing image...");
OutputConsole.Write("Writing metadata...");
for (int i = 0; i < fileLength.Length; i++)
{
Point point = LinearIndexToPoint(generator.NextN, img.Width, img.Height);
Color pixel = img.GetPixel(point.X, point.Y);
char letter = fileLength[i];
int value = Convert.ToInt32(letter);
img.SetPixel(point.X, point.Y, EncodePixel(pixel, value));
}
//Insert # to separate file length from filename
Point point1 = LinearIndexToPoint(generator.NextN, img.Width, img.Height);
Color pixel1 = img.GetPixel(point1.X, point1.Y);
int value1 = Convert.ToInt32('#');
img.SetPixel(point1.X, point1.Y, EncodePixel(pixel1, value1));
//Insert filename and finish with null char
for (int i = 0; i < filename.Length; i++)
{
Point point = LinearIndexToPoint(generator.NextN, img.Width, img.Height);
Color pixel = img.GetPixel(point.X, point.Y);
char letter = filename[i];
int value = Convert.ToInt32(letter);
img.SetPixel(point.X, point.Y, EncodePixel(pixel, value));
}
point1 = LinearIndexToPoint(generator.NextN, img.Width, img.Height);
pixel1 = img.GetPixel(point1.X, point1.Y);
value1 = 0;
img.SetPixel(point1.X, point1.Y, EncodePixel(pixel1, value1));
OutputConsole.Write("Writing file data...");
//Write file
for (int i = 0; i < file.Length; i++)
{
Point point = LinearIndexToPoint(generator.NextN, img.Width, img.Height);
Color pixel = img.GetPixel(point.X, point.Y);
int value = f.file[i];
img.SetPixel(point.X, point.Y, EncodePixel(pixel, value));
}
OutputConsole.Write("Finished embedding file");
}
else
{
OutputConsole.Write("File size is greater than total pixels in image with extra data, resize or use another image to encrypt this file");
img = null;
}
}
private void decryptFile_Click(object sender, EventArgs e)
{
if (currentMode == Mode.Image && image != null)
{
HiddenFile f;
stopwatch.Restart();
if (random.Checked)
{
f = Test1.GetFileFromImage(image);
}
else
{
if (linear.Checked)
{
f = Test1.GetFileFromImageLinear(image);
}
else
{
f = Test1.GetFileFromImage2(image);
}
}
if (f != null)
{
stopwatch.Stop();
OutputConsole.Write(string.Format("Process completed in {0} ms", stopwatch.ElapsedMilliseconds));
saveFileDialog.FileName = f.filename;
DialogResult res = saveFileDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllBytes(saveFileDialog.FileName, f.file);
OutputConsole.Write("File saved");
if (Path.GetExtension(saveFileDialog.FileName) == ".bmp" || Path.GetExtension(saveFileDialog.FileName) == ".png" || Path.GetExtension(saveFileDialog.FileName) == ".jpg")
{
ImgPreview p = new ImgPreview(Image.FromFile(saveFileDialog.FileName));
p.ShowDialog();
}
}
}
else
{
//MessageBox.Show("This image doesn't have an encrypted text or an error occurred");
}
stopwatch.Reset();
}
if (currentMode == Mode.Audio && audio != null)
{
HiddenFile file;
stopwatch.Restart();
if (random.Checked)
{
file = AudioSteganography.DecryptFile(audio);
}
else
{
if (linear.Checked)
{
file = AudioSteganography.DecryptFileLinear(audio);
}
else
{
file = AudioSteganography.DecryptFile2(audio);
}
}
if (file != null)
{
stopwatch.Stop();
OutputConsole.Write(string.Format("Process completed in {0} ms", stopwatch.ElapsedMilliseconds));
saveFileDialog.FileName = file.filename;
DialogResult res = saveFileDialog.ShowDialog();
if (res == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllBytes(saveFileDialog.FileName, file.file);
OutputConsole.Write("File saved");
if (Path.GetExtension(saveFileDialog.FileName) == ".bmp" || Path.GetExtension(saveFileDialog.FileName) == ".png" || Path.GetExtension(saveFileDialog.FileName) == ".jpg")
{
ImgPreview p = new ImgPreview(Image.FromFile(saveFileDialog.FileName));
p.ShowDialog();
}
}
}
stopwatch.Reset();
}
}