private bool TryDecode(string full_bin_list)
{
BinaryBox1.Clear();
BinaryBox2.Clear();
PatterBox.Clear();
number_type[] n_type_array = new number_type[12];
for (int i = 0; i < 12; i++)
{
if (!encoding_table.TryGetValue(full_bin_list.Substring(i * 7, 7), out n_type_array[i]))
{
label1.Text = "Error. There is no such bit patter in encoding table";
return(false);
}
if (i < 6)
{
BinaryBox1.Text += full_bin_list.Substring(i * 7, 7) + " ";
}
else
{
BinaryBox2.Text += full_bin_list.Substring(i * 7, 7) + " ";
}
}
string encoded_type_str = "";
for (int i = 0; i < 6; i++)
{
encoded_type_str += n_type_array[i].type.ToString();
}
for (int i = 0; i < 12; i++)
{
PatterBox.Text += n_type_array[i].type.ToString();
}
int first_number = -1;
for (int i = 0; i < 10; i++)
{
if (first_number_code[i] == encoded_type_str)
{
first_number = i;
break;
}
}
if (first_number == -1)
{
label1.Text = "Error. First number wasn't recognized";
return(false);
}
string fullEAN = first_number.ToString();
for (int i = 0; i < 12; i++)
{
fullEAN += n_type_array[i].number.ToString();
}
DigitBox.Text = fullEAN;
if (get_control_sum(fullEAN) != int.Parse(fullEAN[12].ToString()))
{
label1.Text = "Error. Checksum is wrong";
return(false);
}
return(true);
}
private void DecodeBtn_Click(object sender, EventArgs e)
{
if (Img == null)
{
return;
}
List <List <int> > bb = new List <List <int> >();
for (int yi = 0; yi < Img.Height; yi++)
{
List <int> a = new List <int>();
int b = 1;
bool bc = IsBlack(Img.GetPixel(0, yi));
for (int xi = 1; xi < Img.Width; xi++)
{
bool bc2 = IsBlack(Img.GetPixel(xi, yi));
if (bc2 != bc)
{
a.Add(b);
b = 0;
}
bc = bc2;
b++;
}
bb.Add(a);
}
int[] cc = new int[255];
for (int i = 0; i < bb.Count; i++)
{
if (bb[i].Count < 255)
{
cc[bb[i].Count]++;
}
}
int b_num = 0;
for (int i = 5; i < 255; i++)
{
if (cc[i] > b_num)
{
b_num = i;
}
}
for (int i = 0; i < bb.Count; i++)
{
if (bb[i].Count != b_num)
{
bb.RemoveAt(i);
i--;
}
}
double b_len = 0;
foreach (List <int> a in bb)
{
b_len += a[1] + a[3] + a[a.Count - 2] + a[a.Count - 4];
}
b_len /= 4 * bb.Count;
b_len *= 0.88; // це або баг або фіча,
//довжина перших і останніх базових довжин стрічок трохи більша ніж треба
double w_len = 0;
foreach (List <int> a in bb)
{
w_len += a[2] + a[a.Count - 3];
}
w_len /= 2 * bb.Count;
int bb_inner_length = bb[0].Count;
string full_bin_list = "";
for (int i = 4; i <= bb_inner_length - 4; i++)
{
int cur_sum = 0;
foreach (List <int> cur_line in bb)
{
cur_sum += cur_line[i];
}
int int_bits_amount = 0;
double average_length = (double)cur_sum / bb.Count;
if (i % 2 == 0)
{
double bit_amount = average_length / w_len;
int_bits_amount = (int)Math.Round(bit_amount);
for (int j = 0; j < int_bits_amount; j++)
{
full_bin_list += "0";
}
}
else
{
double bit_amount = average_length / b_len;
int_bits_amount = (int)Math.Round(bit_amount);
for (int j = 0; j < int_bits_amount; j++)
{
full_bin_list += "1";
}
}
}
full_bin_list = full_bin_list.Substring(0, 42) + full_bin_list.Substring(47, 42); // Видалємо середні допоміжні біти
number_type[] n_type_array = new number_type[12];
label1.Text = "Успешно декодирован";
label1.ForeColor = Color.Green;
if (!TryDecode(full_bin_list, n_type_array))
{
number_type[] n_type_array2 = new number_type[12];
for (int i = 0; i < 12; i++)
{
n_type_array2[11 - i] = n_type_array[i];
}
n_type_array = n_type_array2;
if (!TryDecode(full_bin_list, n_type_array))
{
label1.ForeColor = Color.Red;
}
}
}
private void DecodeBtn_Click(object sender, EventArgs e)
{
if (Img == null) return;
List<List<int>> bb = new List<List<int>>();
for (int yi = 0; yi < Img.Height; yi++)
{
List<int> a = new List<int>();
int b = 1;
bool bc = IsBlack(Img.GetPixel(0, yi));
for (int xi = 1; xi < Img.Width; xi++)
{
bool bc2 = IsBlack(Img.GetPixel(xi, yi));
if (bc2 != bc)
{
a.Add(b);
b = 0;
}
bc = bc2;
b++;
}
bb.Add(a);
}
int[] cc = new int[255];
for (int i = 0; i < bb.Count; i++)
{
if (bb[i].Count < 255)
cc[bb[i].Count]++;
}
int b_num = 0;
for (int i = 5; i < 255; i++)
{
if (cc[i] > b_num) b_num = i;
}
for (int i = 0; i < bb.Count; i++)
{
if (bb[i].Count != b_num)
{
bb.RemoveAt(i);
i--;
}
}
double b_len = 0;
foreach (List<int> a in bb)
{
b_len += a[1] + a[3] + a[a.Count - 2] + a[a.Count - 4];
}
b_len /= 4 * bb.Count;
b_len *= 0.88; // це або баг або фіча,
//довжина перших і останніх базових довжин стрічок трохи більша ніж треба
double w_len = 0;
foreach (List<int> a in bb)
{
w_len += a[2] + a[a.Count - 3];
}
w_len /= 2 * bb.Count;
int bb_inner_length = bb[0].Count;
string full_bin_list = "";
for (int i = 4; i <= bb_inner_length - 4; i++)
{
int cur_sum = 0;
foreach (List<int> cur_line in bb)
{
cur_sum += cur_line[i];
}
int int_bits_amount = 0;
double average_length = (double)cur_sum / bb.Count;
if (i % 2 == 0)
{
double bit_amount = average_length / w_len;
int_bits_amount = (int)Math.Round(bit_amount);
for (int j = 0; j < int_bits_amount; j++)
{
full_bin_list += "0";
}
}
else
{
double bit_amount = average_length / b_len;
int_bits_amount = (int)Math.Round(bit_amount);
for (int j = 0; j < int_bits_amount; j++)
{
full_bin_list += "1";
}
}
}
full_bin_list = full_bin_list.Substring(0, 42) + full_bin_list.Substring(47, 42); // Видалємо середні допоміжні біти
number_type[] n_type_array = new number_type[12];
label1.Text = "Успешно декодирован";
label1.ForeColor = Color.Green;
if (!TryDecode(full_bin_list, n_type_array))
{
number_type[] n_type_array2 = new number_type[12];
for (int i = 0; i < 12; i++)
{
n_type_array2[11 - i] = n_type_array[i];
}
n_type_array = n_type_array2;
if (!TryDecode(full_bin_list, n_type_array))
{
label1.ForeColor = Color.Red;
}
}
}
private bool TryDecode(string full_bin_list)
{
BinaryBox1.Clear();
BinaryBox2.Clear();
PatterBox.Clear();
number_type[] n_type_array = new number_type[12];
for (int i = 0; i < 12; i++)
{
if (!encoding_table.TryGetValue(full_bin_list.Substring(i * 7, 7), out n_type_array[i]))
{
label1.Text = "Error. There is no such bit patter in encoding table";
return false;
}
if (i < 6)
BinaryBox1.Text += full_bin_list.Substring(i * 7, 7) + " ";
else
BinaryBox2.Text += full_bin_list.Substring(i * 7, 7) + " ";
}
string encoded_type_str = "";
for (int i = 0; i < 6; i++)
{
encoded_type_str += n_type_array[i].type.ToString();
}
for (int i = 0; i < 12; i++)
{
PatterBox.Text += n_type_array[i].type.ToString();
}
int first_number = -1;
for (int i = 0; i < 10; i++)
{
if (first_number_code[i] == encoded_type_str)
{
first_number = i;
break;
}
}
if (first_number == -1)
{
label1.Text = "Error. First number wasn't recognized";
return false;
}
string fullEAN = first_number.ToString();
for (int i = 0; i < 12; i++)
{
fullEAN += n_type_array[i].number.ToString();
}
DigitBox.Text = fullEAN;
if (get_control_sum(fullEAN) != int.Parse(fullEAN[12].ToString()))
{
label1.Text = "Error. Checksum is wrong";
return false;
}
return true;
}
private bool TryDecode(string full_bin_list, number_type[] n_type_array)
{
BinaryBox.Clear();
PatterBox.Clear();
for (int i = 0; i < 12; i++)
{
if (!encoding_table.TryGetValue(full_bin_list.Substring(i * 7, 7), out n_type_array[i]))
{
label1.Text = "Error. There is no such bit patter in encoding table";
return false;
}
BinaryBox.Text += full_bin_list.Substring(i * 7, 7) + " ";
}
string encoded_type_str = "";
for (int i = 0; i < 6; i++)
{
encoded_type_str += n_type_array[i].type.ToString();
}
for (int i = 0; i < 12; i++)
{
PatterBox.Text += n_type_array[i].type.ToString();
}
int first_number = -1;
for (int i = 0; i < 10; i++)
{
if (first_number_code[i] == encoded_type_str)
{
first_number = i;
break;
}
}
if (first_number == -1)
{
label1.Text = "Error. First number wasn't recognized";
return false;
}
string fullEAN = first_number.ToString();
for (int i = 0; i < 12; i++)
{
fullEAN += n_type_array[i].number.ToString();
}
DigitBox.Text = fullEAN;
int[] fullIntEAN = new int[13];
fullIntEAN[0] = first_number;
for (int i = 0; i < 12; i++)
{
fullIntEAN[i + 1] = n_type_array[i].number;
}
if (!checkCode(fullIntEAN))
{
label1.Text = "Error. Checksum is wrong";
return false;
}
return true;
}
