A High-Capacity Image Steganography Method Using Chaotic Particle Swarm Optimization

Table 1

Particles representation.

Particle name	Value range	Length	Description
Direction	0–15	4 bits	Direction of pixel scanning
X-offset	0–255	8 bits	X-offset of starting point
Y-offset	0–255	8 bits	Y-offset of starting point
Bit-planes	0–15	4 bits	LSBs used for secret bit insertion
SB-pole	0–1	1 bit	Pole of secret bits
SB-dire	0–1	1 bit	Direction of secret bits
BP-dire	0–1	1 bit	Direction of bit-planes
X-side-length	0–255	8 bits	Dimension of block in x-axis
Y-side-length	0–255	1 bit	Dimension of block in y-axis