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".
  
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• • Reply
  togius

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  3 Points

  56 Posts

  Re: Change Bitmap Resolution and Turn Black & White

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

  thanks digimortal