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Todd Kneib  
#1 Posted : Tuesday, May 01, 2007 5:03:14 AM(UTC)
Todd Kneib

Rank: Member

Groups: Member
Joined: 5/10/2006(UTC)
Posts: 7

Thanks: 4 times
I am using the Jpeg2 encoder and it is running very slow. It is literally taking minutes to convert an image to jp2, whereas in Photoshop, it saves in seconds. I tried this:
Code:
bitmap.Save(saveFileDialog1.FileName, new Aurigma.GraphicsMill.Codecs.Jpeg2kEncoderOptions(0.1f));
Ive also tried the following with all the different progressionorders.
Code:
using (Aurigma.GraphicsMill.Bitmap bitmap = 
            new Aurigma.GraphicsMill.Bitmap(img))
{
   using (Aurigma.GraphicsMill.Codecs.Jpeg2kWriter writer = 
               new Aurigma.GraphicsMill.Codecs.Jpeg2kWriter())
   {
      writer.Open(DestinationFileName);
      writer.Progress += new Aurigma.GraphicsMill.ProgressEventHandler(aurBitmap_Progress);

      using (Aurigma.GraphicsMill.Codecs.Jpeg2kFrame frame = 
                  new Aurigma.GraphicsMill.Codecs.Jpeg2kFrame())
      {
         frame.Rate = rateOfCompZeroToOneScale;
         frame.Compression = Aurigma.GraphicsMill.Codecs.CompressionType.WaveletLossy;
         frame.ProgressionOrder = Aurigma.GraphicsMill.Codecs.Jpeg2kProgressionOrder.Pcrl;
         frame.SetBitmap(bitmap);

         writer.AddFrame(frame);
      }
   }
}
I am running version 3.5.405.0 of the Aurigma.GraphicsMill assembly (.net 1.1) Any ideas on how to speed this up. These conversion times are unexceptable to my client, so I'm feeling some heat :(

Edited by user Tuesday, December 18, 2007 3:28:26 AM(UTC)  | Reason: Not specified

Alex Kon  
#2 Posted : Tuesday, May 01, 2007 1:01:10 PM(UTC)
Alex Kon

Rank: Advanced Member

Groups: Member
Joined: 1/31/2005(UTC)
Posts: 458

Was thanked: 5 time(s) in 5 post(s)
Hello Todd, Unfortunatelly we have to confirm this problem with our Jpeg2000 encoder. We are going to fix this issue in future releases.
cl  
#3 Posted : Tuesday, May 29, 2007 2:02:34 PM(UTC)
cl

Rank: Member

Groups: Member
Joined: 5/29/2007(UTC)
Posts: 1

I found the same thing, but I noticed that it only seems to happen for higher-resolution images. I have found that a safe level seems to be any image where Width * Height < 2600000 In one of my apps I have been checking the resolution and saving to JPEG2000 only if the resolution is low enough for the saving speed to be fast, like this:
Code:
				if (MyBitmap.Width * MyBitmap.Height <= 2600000)
				{
					// Compress with JPEG 2000
					MyBitmap.Save(stream, new Aurigma.GraphicsMill.Codecs.Jpeg2kEncoderOptions(0.07f));
				}
				else
				{
					// Compress with standard JPEG
					MyBitmap.Save(stream, new Aurigma.GraphicsMill.Codecs.JpegEncoderOptions());
				}

Edited by user Tuesday, December 18, 2007 3:31:16 AM(UTC)  | Reason: Not specified

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