using System;

using System.Drawing;

using System.IO;

using System.Net;

using System.Text;

​

namespace ConvertImageFromUrlToAscii

{

    public class Program

    {

        //Mickey

        private const string _remoteImageUrl = "http://www.tutsking.com/wp-content/uploads/disney-mickey-mouse-head.jpg";

        //Donald

        //private const string _remoteImageUrl = "http://www.gotyourhandsfull.com/wp-content/uploads/2014/03/Donald-Duck-Coloring-Pages-To-Print.gif";

        //Goofy 

        //private const string _remoteImageUrl = "http://hoteldisneyland.es/wp-content/uploads/goofy.png";

        //World cup

        //private const string _remoteImageUrl = "http://ww1.prweb.com/prfiles/2013/07/26/10969819/fifa%20tv.JPG";

        private const int _asciiWidth = 150;

        private static string[] _asciiChars = { "#", "#", "@", "%", "=", "+", "*", ":", "-", ".", " " };

​

        public  static void Main()

        {

            Bitmap image = GetBitmapFromUrl(_remoteImageUrl);

​

            string ascii = ConvertImageToAsciiArt(image);

            Console.Write(ascii);

        }

​

        //from http://stackoverflow.com/questions/12142634/download-image-and-create-bitmap

        private static Bitmap GetBitmapFromUrl(string remoteImageUrl)

        {

            WebRequest request = WebRequest.Create(remoteImageUrl);

            WebResponse response = request.GetResponse();

            Stream responseStream = response.GetResponseStream();

            Bitmap bitmap = new Bitmap(responseStream);

            return bitmap;

        }

        //from http://www.c-sharpcorner.com/uploadfile/dheenu27/imagetoasciiconverter03022007164455pm/imagetoasciiconverter.aspx

        private static string ConvertImageToAsciiArt(Bitmap image)

        {

            image = GetReSizedImage(image, _asciiWidth);

​

            //Convert the resized image into ASCII

            string ascii = ConvertToAscii(image);

            return ascii;

        }

​

​

​

        private static Bitmap GetReSizedImage(Bitmap inputBitmap, int asciiWidth)

        {

            int asciiHeight = 0;

            //Calculate the new Height of the image from its width

            asciiHeight = (int) Math.Ceiling((double) inputBitmap.Height*asciiWidth/inputBitmap.Width);

​

            //Create a new Bitmap and define its resolution

            Bitmap result = new Bitmap(asciiWidth, asciiHeight);

            Graphics g = Graphics.FromImage((Image) result);

            //The interpolation mode produces high quality images 

            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

            g.DrawImage(inputBitmap, 0, 0, asciiWidth, asciiHeight);

            g.Dispose();

            return result;

        }

​

        private static string ConvertToAscii(Bitmap image)

        {

            Boolean toggle = false;

            StringBuilder sb = new StringBuilder();

​

            for (int h = 0; h < image.Height; h++)

            {

                for (int w = 0; w < image.Width; w++)

                {

                    Color pixelColor = image.GetPixel(w, h);

                    //Average out the RGB components to find the Gray Color

                    int red = (pixelColor.R + pixelColor.G + pixelColor.B)/3;

                    int green = (pixelColor.R + pixelColor.G + pixelColor.B)/3;

                    int blue = (pixelColor.R + pixelColor.G + pixelColor.B)/3;

                    Color grayColor = Color.FromArgb(red, green, blue);

​

                    //Use the toggle flag to minimize height-wise stretch

                    if (!toggle)

                    {

                        int index = (grayColor.R*10)/255;

                        sb.Append(_asciiChars[index]);

                    }

                }

​

                if (!toggle)

                {

                    sb.Append(Environment.NewLine);

                    toggle = true;

                }

                else

                {

                    toggle = false;

                }

            }

​

            return sb.ToString();

        }   

    }

}

​