@Override
    public PngImagingParameters getDefaultParameters() {
        return new PngImagingParameters();
    }
@param is PNG image input stream
@return List of String-formatted chunk types, ie. "tRNs".
@throws ImagingException if it fail to read the PNG chunks
@throws IOException      if it fails to read the input stream data
src/main/java/org/apache/commons/imaging/formats/png/PngImageParser.java