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#1 Posted : Thursday, June 10, 2010 11:35:08 PM(UTC)
Cidolfus

Groups: Registered
Posts: 10


Hi,

I'm able to successfully convert a jpg file into jp2 format with the following code in C#

byte[] imgData = File.ReadAllBytes("depp.jpg");
MemoryStream ms = new MemoryStream(imgData);
RasterCodecs.Startup();
RasterCodecs objImageCodec = new RasterCodecs();
RasterImage image = objImageCodec.Load(ms);
MemoryStream jp2MS = new MemoryStream();
objImageCodec.Save(image, jp2MS, RasterImageFormat.Jp2, 24);
byte[] jp2Data = jp2MS.ToArray();
RasterCodecs.Shutdown();

the jpg file size is 13k, however, the output of the jp2 file is 70k, why did it bloat up so much? How can I compress this? I'd like the file size to be around half of the jpg version. Is this possible?

 

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#2 Posted : Sunday, June 13, 2010 5:42:20 AM(UTC)

Adam Boulad  
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Posts: 3,028

Was thanked: 2 time(s) in 2 post(s)

You can try to change the CodecsJpeg2000SaveOptions.CompressionControl Property and choose a different compression controls (such as the TargetSize mode for example) and then set the desired output size using the CodecsJpeg2000SaveOptions.TargetFileSize Property as follows:
objImageCodec.Options.Jpeg2000.Save.CompressionControl = CodecsJpeg2000CompressionControl.TargetSize;
objImageCodec.Options.Jpeg2000.Save.TargetFileSize = 1000;
Please check the .NET help file for more information regarding compression control.
 
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