Created as a "C# console application (.NET Framework)"
Replace the namespace part with your project name.
Specify the image file in the "Image file path here" section
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace (Change here)
{
public partial class Form1 : Form
{
//↓Use your favorite characters(Multibyte characters, in order of density)).
string[] dchs = { "歌","姫","電", "音", "初", "子", "39", "YY", "01", "ね", "ギ", "♪", "み", "は", "ネ", "ミ", "ク", "く", "つ","３","９","０", "Ｙ", "１" ," " };
//For blank.
string bg = "・";
//Scale(1/SCALEx).
const int SCALE = 5;
//Gamma Correction(Maybe 3.5 would be just right?).
const double GAMMA = 3.5;
//For black and white inversion (select true if the text in Notepad is white, false if it is black).
bool rev = true;
public Form1()
{
InitializeComponent();
Bitmap bitmap = new Bitmap(@"Image file path");
Bitmap bmp = new Bitmap(bitmap,new Size(bitmap.Width / SCALE,bitmap.Height / SCALE));
BitmapData data = bmp.LockBits(
new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
byte[] buf = new byte[bmp.Width * bmp.Height * 4];
Marshal.Copy(data.Scan0, buf, 0, buf.Length);
Encoding enc = Encoding.GetEncoding("UTF-8");
StreamWriter writer = new StreamWriter(@"return.txt", false, enc);
// ファイルを閉じる
int avr = 0;
for (int i = 0; i < buf.Length; i += 4)
{
avr = 0;
for (int j = 0; j < 4; j++) avr += buf[i + j];
if (avr == 0)
{
writer.Write(bg);
}
else
{
avr = (int)(256 * 4 * Math.Pow(avr / 256.0 / 4, GAMMA));
writer.Write(dchs[rev ? dchs.Length - 1 - avr * dchs.Length / 256 / 4 : avr * dchs.Length / 256 / 4]);
}
if(i > 0 && i % (bmp.Width * 4) == 0) writer.Write("\n");
}
writer.Close();
bmp.UnlockBits(data);
}
}
}
