Application of a Fractional Grey Prediction Model Based on a Filtering Algorithm in Image Processing

Table 1

Abbreviations and corresponding definitions for different grey prediction models.

Index	Abbreviation	Definition
1	MF	Mean filter
2	AMF	Adaptive median filter
3	WMF	Weighted median filter
4	IWT	Joint wavelet transform scheme using the iterative noise density and median filtering
5	SF	Switching filter
6	CA	Image noise filter based on cellular automata
7	GM(1,1)	Grey model with one variable and one first-order equation
8	NDGM(1,1)	Nonhomogeneous discrete grey model with one variable and one first-order equation
9	ATMAR	Adaptive trimmed mean autoregressive
10	ATMF	Adaptive trimmed mean filter
11	NDGM^p/q(1,1)	Nonhomogeneous discrete grey model with one variable and fractional-order accumulation equation