Растровое изображение в векторное без автотрансформации

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I'm currently in the process of writing a code snippet that converts a Raster image to a Vector image. It works but the output becomes quite large on larger images, ex. on an 960px * 800px image the output is around 160mb, I've searched relentlessly on google for a solution of creating an array of sorts for fill blocks(what i save the color values in). So far no such luck so I have decided to seek out the assistance of my fellow coders to enquire of their knowledge and expertise on the matter at hand. Please feel free to leave a comment if you have and knowledge or information, or would like to discuss this concept further or rant if you must :). So far here is the code snippet that i am working with.

public static unsafe void SaveVector(this Image @this, Stream outputStream)
		{
			
			int PixelSize = 4;
			Rectangle rect = new Rectangle(new Point(0,0), @this.Size);						
			using(StreamWriter SvgWriter = new StreamWriter(outputStream))
			{
				using(Bitmap bitmap = new Bitmap(@this))
				{
					BitmapData bitmapData = bitmap.LockBits(rect, ImageLockMode.ReadOnly,PixelFormat.Format32bppArgb);
					SvgWriter.WriteLine("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>");
					SvgWriter.WriteLine("<svg");
					SvgWriter.WriteLine("   xmlns:svg=\"http://www.w3.org/2000/svg\"");
					SvgWriter.WriteLine("   xmlns=\"http://www.w3.org/2000/svg\"");
					SvgWriter.WriteLine(string.Format("   width=\"{0}\"", @this.Width));
					SvgWriter.WriteLine(string.Format("   height=\"{0}\"", @this.Height));
					SvgWriter.WriteLine("   id=\"svg2\"");
					SvgWriter.WriteLine("   version=\"1.1\">");
					SvgWriter.WriteLine("  <defs");
					SvgWriter.WriteLine("     id=\"defs4\" />");
					SvgWriter.WriteLine("  <metadata");
					SvgWriter.WriteLine("     id=\"metadata7\" />");
					SvgWriter.WriteLine("  <g");
					SvgWriter.WriteLine("     id=\"layer1\">");
					int num = 0;				
					for(int y = 0; y < bitmapData.Height; y++)
					{
						byte* row=(byte *)bitmapData.Scan0+(y*bitmapData.Stride);
						for(int x = 0; x < bitmapData.Width; x++)
						{
							SvgWriter.WriteLine("    <rect");							
							SvgWriter.WriteLine(string.Format("       style=\"fill:{0};fill-opacity:1;stroke-width:0.43599999000000000;stroke-miterlimit:4;stroke-dasharray:none\"", 
								ColorTranslator.ToHtml(Color.FromArgb(
								row[(x * PixelSize) + 3],
								row[(x * PixelSize) + 2],
								row[(x * PixelSize) + 1],
								row[x * PixelSize]))));
							SvgWriter.WriteLine(string.Format("       id=\"rect{0}\"", num));
							SvgWriter.WriteLine("       width=\"1\"");
							SvgWriter.WriteLine("       height=\"1\"");
							SvgWriter.WriteLine(string.Format("       x=\"{0}\"", x));
							SvgWriter.WriteLine(string.Format("       y=\"{0}\" />", y));							
							num++;
						}						
					}
					bitmap.UnlockBits(bitmapData);
				}
				SvgWriter.WriteLine("  </g>");
				SvgWriter.WriteLine("</svg>");
			}
		}
	}

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