Reversible Data Hiding Scheme with High Embedding Capacity Using Semi-Indicator-Free Strategy

Table 1

The functions of each number of the 𝑁_𝑧 binary digits (𝑁_𝑧 bits).

Number	Function
0~2^𝑁𝑧−3	Indicator and encoding code
2^𝑁𝑧−2	Indicator (indicator  0)
2^𝑁𝑧−1	Indicator (indicator  1)