Restoration method of sootiness mural images based on dark channel prior and Retinex by bilateral filter

Heritage Science

Table 2 The processing time of the proposed method

Method			Time
First step	Data preprocessing	Radiometric Correction	About 600 s
		MNF	About 900 s
		Inverse MNF	About 120 s
Second step	Sootiness Mural Image Produce		3.5 s
Third step	Preliminary Sootiness Removal		2.7 s
Fourth step	Fine Sootiness Removal		53.9 s