/***
* Gets the number of pages in a JBIG2 image.
* @param ra a random acces file array containing a JBIG2 image
* @return the number of pages
*/
public static int GetNumberOfPages(RandomAccessFileOrArray ra)
{
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.Read();
return(sr.NumberOfPages());
}