Using Aspose.Imaging for .NET library it is easy To convert To J2K(Wavelet Compressed Image) from other supported image formats...J2K DIB to J2K DICOM to J2K DJVU to J2K DNG to J2K EMF to J2K...to J2K TGA to J2K TIF to J2K TIFF to J2K WEBP to J2K WMF to J2K...