Table 2.

Comparison of entropy results for Lena image of size $512\times 512\times 3$ with 8-bit RGB format.

Cryptogram Size $512\times 512\times 3$		Components RGB of 8 bit Entropy (bit/symbol)
Chaotic Map	Average Entropy	R	G	B
Proposed Tinkerbell [73]	7.99925	7.99925	7.99924	7.99926
Related work
Logistic 1D [25]	7.997200	7.99740	7.99750	7.99690
PELM [36]	7.994500	N/A	N/A	N/A
Tent [32]	7.998000	N/A	N/A	N/A
Novel 3D [4]	7.998200	7.99830	7.99820	7.99820
Chen [11]	7.997200	7.99720	7.99730	7.99710
Lorenz & Chen [81]	7.999300	N/A	N/A	N/A
5D Hyperchaotic [77]	7.997300	N/A	N/A	N/A
Logistic 1D [41]	7.999999	N/A	N/A	N/A
Logistic 1D [59]	7.999100	N/A	N/A	N/A