Text Extraction from Historical Document Images by the Combination of Several Thresholding Techniques

Table 3

Final ranking of the compared methods on the test set.

Rank	Method	Execution time; (ms)	-measure; (%)	PSNR	NRM; (10^−2)	MPM; (10^−3)	DRD	Sum of ranks
1	Proposed Approche	6	1	1	1	1	1	11
2	Tabatabaei and Bohlool [16]	10	2	2	4	2	2	22
3	Sauvola and Pietikäinen [3]	8	3	4	2	3	4	24
4	Kapur et al. [8]	4	5	6	3	4	6	28
5	Nick	7	4	3	6	5	3	28
6	Otsu [6]	2	6	5	5	7	7	32
7	IGT	1	8	8	7	6	8	38
8	Improved IGT	3	7	7	9	8	5	39
9	Gangamma and Srikanta [14]	9	9	9	10	9	9	55
10	Thresholding by Background Subtraction	5	10	10	11	10	10	56
11	Niblack [11]	11	11	11	8	11	11	63