在图像中保存文本数据
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以图像格式保存文本数据
文本保存方式如下:
引言
我尝试编写一个新的字符串压缩器，但相信我，这并不容易。我尝试将文本保存到图像的RGB中，并将其移动到灰度，但我发现这不可行，或者会占用更多的字节。无论如何，我将此代码发送给您，也许可以节省您的时间。
- LoadText（点击“com”）：您可以在图像中看到您的文本，就像顶部图像一样。
- SaveImage：点击图像，保存它。
- LaodImage（点击“decom”）：您可以保存保存在图像中的文本。
MainClass
您可以使用 com 和 decom 类。
com nbv = new com();
nbv.doCompress(String, String);
Decom图像类
decom nb = new decom();
nb.doDeCompress(String,String);
背景
使用代码
此类将int字放入RGB(X1,X2,X3)中，其值小于255。获取表示图像大小的总字母数的平方根，该值除以三，因为每个像素包含3个字母。
引用将字符转换为ASCII值并添加到letters集合中混合像素中的RGB(R,G,b)
class com
{
public void doCompress(string FileText, string FileImage)
{
using (StreamReader sr = File.OpenText(FileText))
// Get text from a .txt file to compress
{
var line = ""; // To hold a line of the file
var R = 0; // To hold 4 letters as Red value
var G = 0; // To hold 4 letters as Green value
var B = 0; // To hold 4 letters as Blue value
var letters = new List();
// To hold the characters of line
//Read lines one by one from stream reader
while ((line = sr.ReadLine()) != null)
{
foreach (char ch in line) // Get character from a line
{
letters.Add(Convert.ToInt16(ch));
// Convert the character
//into ASCII value and add in letters collection
}
letters.Add(255); // Use 255 as a flag that indicates new line
//counter_line++;
}
/* Get square root of total letter that indicate size
of the image (get the value divided by three since each
pixel contains 3 letters*/
var square = Math.Sqrt(letters.Count / 3);
/* Get square root of total letter that indicate size
* of the image (get the value divided by three since
* each pixel contains 3 letters*/
square += 1; // Add one value for any exceeds if any
square = Math.Round(square);
// Have a BitMap with optimal size that we calculated
var bmp = new Bitmap((int)square, (int)square);
var count = 0; // count for letters
for (int row = 1; row < square; row++) // Indicates row number
{
for (int column = 1; column < square; column++) // Indicate column number
{
if (count < (letters.Count - 3)) // Check for last pixel
{
R = letters[count++]; // Assignee a letter in Red value
G = letters[count++]; // Assignee a letter in Green value
B = letters[count++]; // Assignee a letter in Blue value
// Set pixel with the combination of two value
bmp.SetPixel(row, column, (Color.FromArgb( R, G, B)));
}
}
}
bmp.Save(FileImage, ImageFormat.Png); //Save the Bitmap and this is the compressed Image Data
}
}
}
此类获取RGB颜色列表并转换字符
- 获取红色->转换字符
- 获取绿色->转换字符
- 获取蓝色->转换字符
class decom
{
public void doDeCompress(string FileImage,string FileText)
{
var lettersExtract = new List(); // To hold extracted letters
var bmp = new Bitmap(Bitmap.FromFile(FileImage));
// Get the Image data to DeCompress
for (int row = 1; row < bmp.Width; row++) // Indicates row number
{
for (int column = 1; column < bmp.Height; column++)
// Indicate column number
{
var cr = bmp.GetPixel(row, column);
// Get the pixel of the current row and column
lettersExtract.Add(cr.R);
// Get the Red Value and Add in letterExtract collection
lettersExtract.Add(cr.G);
// Get the Green Value and Add in letterExtract collection
lettersExtract.Add(cr.B);
// Get the Blue Value and Add in letterExtract collection
}
}
using (System.IO.StreamWriter file = new
System.IO.StreamWriter(FileText,false,Encoding.Default))
// Open a text file to extract
{
foreach (int write in lettersExtract)
//Get color value one by one from the letters Extracted
{
if (write == 255)
//Condition check for new line since 255 is a flag of new line
file.WriteLine("");
else
file.Write((Char)write);
// Write the character in the file by converting
// the color value into character
}
}
}
}
在GUI Windows中混合所有数据:
我使用 openFileDialog 和 saveFileDialog。
- 将文本加载到 RichTextBoxStream 中
- 将临时图像加载到 PictureBox 中（PictureBoxSizeMode.StretchImage）
- 点击图像并保存它（AppDomain.CurrentDomain.BaseDirectory ,pictureBox.Image.Save(URL)）。
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
static string word;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string Chosen_File = "";
string name_image_save = AppDomain.CurrentDomain.BaseDirectory.ToString()
+ "\\" + "compressed.png"; // temp file
openFileDialog1.InitialDirectory = Application.ExecutablePath.ToString();
openFileDialog1.Title = "Load text";
openFileDialog1.Filter = "Text Normal|*.txt|Text INF|*.inf";
if (openFileDialog1.ShowDialog() != DialogResult.Cancel)
{
//richTextBox1
Chosen_File = openFileDialog1.FileName;
richTextBox1.LoadFile(Chosen_File, RichTextBoxStreamType.PlainText);
//-------------- use class
com nbv = new com();
nbv.doCompress(Chosen_File, name_image_save);
//------------
}
pictureBox1.Load(name_image_save);
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
private void button2_Click(object sender, EventArgs e)
{
string Chosen_File = "";
string name_text_save = AppDomain.CurrentDomain.BaseDirectory.ToString()
+ "\\" + "decompress.txt";
openFileDialog2.InitialDirectory = Application.ExecutablePath.ToString();
openFileDialog2.Title = "Load image";
openFileDialog2.Filter = "Image Normal|*.PNG";
if (openFileDialog2.ShowDialog() != DialogResult.Cancel)
{
//richTextBox1
Chosen_File = openFileDialog2.FileName;
pictureBox2.Load(Chosen_File);
//-------------------
decom nb = new decom();
nb.doDeCompress(Chosen_File, name_text_save);
//--------------------
pictureBox2.SizeMode = PictureBoxSizeMode.StretchImage;
richTextBox2.LoadFile(name_text_save, RichTextBoxStreamType.PlainText);
}
}
private void pictureBox1_Click(object sender, EventArgs e)
{
try // control error
{
string Chosen_File = "";
string name_image_save = AppDomain.CurrentDomain.BaseDirectory.ToString()
+ "\\" + "compressed.png";
saveFileDialog1.InitialDirectory = Application.ExecutablePath.ToString();
saveFileDialog1.Title = "Save Image";
saveFileDialog1.Filter = "Image Normal|*.PNG";
if (saveFileDialog1.ShowDialog() != DialogResult.Cancel)
{
//richTextBox1
Chosen_File = saveFileDialog1.FileName;
pictureBox1.Image.Save(Chosen_File);
MessageBox.Show("Image Save it");
}
}
catch
{
MessageBox.Show("not find any image in pictureBox1");
}
}
}
}