J2K Compression Issue

#1 Posted : Wednesday, May 9, 2007 7:59:36 AM(UTC)

amarwadi

Groups: Registered
Posts: 2

Hello,
I am trying to use the Jpeg2000SaveOptions in order to compress and save the Raster Image using the following method:

private byte[] Compress(byte[] imageData, int qualityFactor)
        {
            RasterImage image = LoadRasterImage(imageData);
            m_Codecs.Options.Jpeg2000.Save.CompressionControl = CodecsJpeg2000CompressionControl.QualityFactor;
            m_Codecs.Options.Jpeg2000.Save.CompressionRatio = qualityFactor;
           MemoryStream stream = new MemoryStream();
            m_Codecs.Save(image, stream, RasterImageFormat.J2k, 0);

            return stream.ToArray();
        }

No matter what qualityFactor I use, the image compression doesn't seem to be working. Am I doing something wrong out here? Any help would be highly appreciated.

Thank You
Anup

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#2 Posted : Thursday, May 10, 2007 1:37:53 AM(UTC)

Adnan Ismail

Groups: Guests
Posts: 3,022

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

Anup,

You should not pass the QualityFactor value to the "CodecsJpegSaveOptions.CompressionRatio"
property, you should pass it to the "CodecsJpegSaveOptions.QualityFactor" property instead.

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J2K Compression Issue