A Method of Effective Text Extraction for Complex Video Scene

Table 3

Text extraction recall rate of four different kinds of video images.

Video type	Number of text regions	Recall rate (%)
		Otsu [17]	Sato et al. [18]	Lyu et al. [19]	Song et al. [20]	Shivakumara et al. [21]	Our; algorithm
Movie (121 frames)	432	63.8	67.5	85.3	70.7	81.4	87.6
News (85 frames)	261	57.5	60.2	78.4	65.6	73.9	81.8
Sport (103 frames)	368	45.9	49.8	67.3	57.5	62.4	69.4
Cartoon (86 frames)	254	68.6	73.2	89.6	78.5	85.6	92.5
Total	1315	58.9	62.7	80.2	68.1	75.8	82.8