How to change color of Image at runtime

Question

I would like to know is there any way by which we can change the Image color at runtime. for e.g lets say I am having a JPG bind to an Image control of ASP.Net. Next I am ha

Answer 1

You also try this for web (asp.net) , you can ignore the logic but can see what getpixel & setpixel doing

 public string FileUpload( HttpPostedFileBase file )
  {
     Bitmap bmp = new Bitmap(file.InputStream);
     string valid = "";

     for(int i = 0; i < bmp.Width; i++) {
        for(int j = 0; j < bmp.Height; j++) {
           if(bmp.GetPixel(i , j).B < 20) {
              if(bmp.GetPixel(i , j).B == bmp.GetPixel(i , j).G &&
                 bmp.GetPixel(i , j).B == bmp.GetPixel(i , j).R) {
                 valid = valid + bmp.GetPixel(i , j). + "
";
                 bmp.SetPixel(i , j , Color.DarkGreen);
              }
           }
        }
     }

     SaveImage(bmp);

     return valid;
  }

  private void SaveImage( Bitmap newbmp )
  {
     string path = Path.Combine(Server.MapPath("~/Images") , "ScaledImage.jpeg");
     newbmp.Save(path , System.Drawing.Imaging.ImageFormat.Jpeg);
  }