A Comparative Analysis of Information Hiding Techniques for Copyright Protection of Text Documents

Table 6

Binary classification model in UniSpaCh [22].

Symbol	Spaces	Sequence
Representation scheme for interword spacing and intersentence spacing (Group A)
“ ”	Normal	00
“”	Thin + normal	01
“”	Six-per-em + normal	10
“”	Hair + normal	11
Representation scheme for end-of-line and interparagraph spacing (Group B)
“”	Hair	00
“”	Six-per-em	01
“”	Punctuation	10
“”	Thin	11