1 Depart Process:  2 1. Grep xref and trailer binary position in file.  3 2. Dump xref table and trailer part.  4 3. Calculate every object binary offset and length.  5 4. Dump every object.  6 5. Dump header part.  7   8 Manual Process:  9 1. Find object contains stream. 10 2. Deflate stream. 11 3. Modify grahics operators. 12 4. Flate stream back to object. 13  14 Part Process: 15 1. DD header part. 16 2. DD every object, log every binary offset. 17 3. Rewrite xref table. 18 4. Rewrite trailer part.