C#图像转字符串

生成方法

 class ImageConvert
 {
 		private static readonly string brightStr = "MNHQ&OC?7>!:-;. ";
		/// <summary>
        ///  图像转string
        /// </summary>
        /// <param name="bitmap">图片</param>
        /// <param name="zoomWidth">宽度缩放0.1-1</param>
        /// <param name="zoomHeight">高度缩放0.1-1</param>
        /// <returns></returns>
        public static string Generate(Bitmap bitmap, double zoomWidth,double zoomHeight)
        {
            StringBuilder result = new StringBuilder();
            int bitmapH = bitmap.Height;
            int bitmapW = bitmap.Width;


            int outH = Convert.ToInt32(bitmapH * zoomHeight);
            int outW = Convert.ToInt32(bitmapW * zoomWidth);
            int areaCountH = bitmapH / outH;
            int areaCountW = bitmapW / outW;

            for (int h = 0; h < outH; h++)
            {
                for (int w = 0; w < outW; w++)
                {
                    double averBright = 0;
                    int sY = (int)(h / zoomHeight);
                    int sX = (int)(w / zoomWidth);
                    for (int y = sY; y < sY + areaCountH; y++)
                    {
                        for (int x = sX; x < sX + areaCountW; x++)
                        {
                            Color color = bitmap.GetPixel(x, y);
                            averBright += color.GetBrightness();//获取亮度
                        }
                    }
                    averBright /= (areaCountH * areaCountW);
                    int index = (int)(averBright / (1.0 / brightStr.Length));
                    if (index >= brightStr.Length)
                    {
                        result.Append(brightStr[brightStr.Length - 1]);
                    }
                    else
                    {
                        result.Append(brightStr[index]);
                    }
                }
                result.Append("\r\n");
            }
            return result.ToString();
        }

调用

private void ImageSelect_Click(object sender, RoutedEventArgs e)
{
    Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog()
    {
        Filter = "图片|*.jpg;*.png;",
        Multiselect = false
    };
    if (openFileDialog.ShowDialog() == true)
    {
        string path = openFileDialog.FileName;
        Bitmap bitmap = new Bitmap(path);
        string savePath = $"{Environment.CurrentDirectory}\\{Guid.NewGuid()}.txt";
        string result = ImageConvert.Generate(bitmap,1,1);
        File.WriteAllText(savePath, result);
    }
}

效果