Figure 13
From: A New Inverse Halftoning Method Using Reversible Data Hiding for Halftone Images

An example of PHi (first row) and PLi (2nd row) obtained from the Lena image.
From: A New Inverse Halftoning Method Using Reversible Data Hiding for Halftone Images
An example of PHi (first row) and PLi (2nd row) obtained from the Lena image.