An Improved Piecewise Linear Chaotic Map Based Image Encryption Algorithm

Table 1

Correlation coefficients of two adjacent pixels in the plain and ciphered images.

Correlation	Horizontal	Vertical	Diagonal
Lena	0.924879	0.959276	0.902644
Encrypted Lena	0.003503	0.000213	0.000728
Encrypted Lena [14]	0.032107	0.027188	0.038393
Sailboat	0.940113	0.936439	0.905541
Encrypted Sailboat	−0.001751	−0.005422	−0.001061
Encrypted Sailboat [14]	0.032347	0.011135	0.014651
Pepper	0.942848	0.945174	0.897210
Encrypted Pepper	−0.000182	0.000357	0.004215
Encrypted Pepper [14]	0.014260	−0.00820751	0.063500
Cameraman	0.933475	0.959223	0.908663
Encrypted Cameraman	−0.000090	−0.007362	0.003039