[Retracted] Multilevel Image Edge Detection Algorithm Based on Visual Perception

Table 1

Parameter settings.

Name	Parameter
Image partitioning	8 × 8 size block, and each block contains 64 pixels
Image color space conversion	Y = 1.587; Cb + 0.5884; Cr = 2.0454
Significant digit	8
Actual value	0.0001
AC coefficient brightness	Stroke/size: 0/5, code length: 5, and code word: 11010
AC coefficient chroma	Stroke/size: F/A, code length: 16, and code word: 11111111111111111110
Chaotic system	Logistic mapping
Pseudorandom sequence generation method	Threshold method
Image scrambling method	Baker mapping