You can use Aspose.Imaging for Python via .NET library to convert from a variety of formats to CANVAS...WEBP to CANVAS WMF to CANVAS WMZ to CANVAS SVG to CANVAS SVGZ...
Using Aspose.Imaging for .NET library it is easy to convert to J2K(Wavelet Compressed Image) from other supported image formats...to J2K WEBP to J2K WMF to J2K WMZ to J2K SVG to J2K SVGZ to J2K...