Change Bitmap Resolution and Turn Black & White[Answered] RSS

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  togius

  Member

  3 Points

  56 Posts

  Change Bitmap Resolution and Turn Black & White

  Sep 02, 2010 04:33 AM|togius|LINK

  i use this method to resize bitmaps.

  Bitmap OriginalBM = (Bitmap)Bitmap.FromStream(fileUploader.PostedFile.InputStream);
              Size newSize = new Size(300, 500);
              Bitmap Resizebm = new Bitmap(OriginalBM, newSize);
              Resizebm.Save(HttpContext.Current.Server.MapPath(yourPath) + yourImage, ImageFormat.Jpeg);
              OriginalBM.Dispose();

  
  My question is how can i Change Bitmap Resolution and Turn Black & White?

  
  

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  DigiMortal

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  Re: Change Bitmap Resolution and Turn Black & White

  Sep 02, 2010 06:29 AM|DigiMortal|LINK

  Using this code example you can create grayscale images.

  public Bitmap GrayScale(Bitmap Bmp)
  {
      int rgb;
      Color c;
      
  
      for (int y = 0; y <Bmp.Height; y++)
          for (int x = 0; x <Bmp.Width; x++)
          {
              c = Bmp.GetPixel(x, y);
              rgb = (int)((c.R + c.G + c.B) / 3);
              Bmp.SetPixel(x, y, Color.FromArgb(rgb, rgb, rgb));
          }
      return Bmp;
  }

  
  
  

  You can read more about this example from my blog posting How to create grayscale images on .NET.

  Don't forget to mark solution providing post as "Answered".
  
  Also visit my ASP.NET blog or follow me @ Twitter:twitter.com/gpeipman
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  togius

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  56 Posts

  Re: Change Bitmap Resolution and Turn Black & White

  Sep 02, 2010 08:45 AM|togius|LINK

  thanks digimortal