A standardised protocol for texture feature analysis of endoscopic images in gynaecological cancer

Table 2 Gamma correction parameters A, k and γ for three different experiments and their median values

A matrix	No Correction	Exp 1	Exp 2	Exp 3	Median values for Exps 1, 2, 3
a₁₁	1	0,827	0,927	0,975	0,927
a₁₂	0	0,065	0,011	0,105	0,065
a₁₃	0	0,042	0,004	0,104	0,042
a₂₁	0	0,065	0,011	0,105	0,065
a₂₂	1	0,780	0,935	0,895	0,895
a₂₃	0	0,071	0,062	0,134	0,071
a₃₁	0	0,042	0,004	0,104	0,042
a₃₂	0	0,044	0,032	0,023	0,032
a₃₃	1	0,868	1,011	1,044	1,011
k matrix
k₁₁	0	7,693	1,101	-1,673	1,101
k₂₁	0	10,083	2,090	0,528	2,090
k₃₁	0	-8,161	1,598	-5,689	-5,689
γ matrix
γ_R	1	1,285	1,078	1,038	1,078
γ_G	1	1,220	1,046	0,999	1,046
γ_B	1	1,180	0,971	1,040	1,040

ISSN: 1475-925X