--- a/djvu.rst	Sun Oct 24 21:42:43 2010 +0300
+++ b/djvu.rst	Sun Oct 24 21:51:26 2010 +0300
@@ -32,13 +32,22 @@
 
   http://www.djvu.org/resources/
 
-* pdf to djvu.
+* djvu to pdf.
 
 ** djvulibre.
 
   $ ddjvu -format=tiff book.djvu book.tiff
   $ tiff2pdf -o book.pdf book.tiff
 
+* pdf to djvu.
+
+** djvulibre.
+
+  $ pdftoppm -mono -r 600 -aa yes $PDF $PDF
+  $ for PBM in $PDF*.pbm; do  cjb2 -dpi $DPI $PBM $PBM.djvu;  rm -f $PBM;  done
+
+  $ djvm -c $OUTFILE $MASK*.pbm.djvu
+
 ** pdf2djvu.
 
   $ pdf2djvu file.pdf
@@ -46,3 +55,19 @@
   http://code.google.com/p/pdf2djvu/
                 home page
 
+* jpg to djvu.
+
+** JPEG to bitonal DjVu.
+
+  $ anytopnm page.djvu | ppmtopgm | pgmtopbm -value 0.499 > page.pbm
+  $ cjb2 -dpi $DPI page.pbm page.djvu
+
+  $ djvm -c $OUTFILE $MASK.djvu    # Many .djvu to single .djvu.
+
+
+** JPEG to low colour DjVu.
+
+  $ cpaldjvu -dpi $DPI -colors $NCOLORS $i $i.djvu
+
+  $ djvm -c $OUTFILE $MASK.djvu    # Many .djvu to single .djvu.
+