Table 1.

Average characteristics of text objects, non-text objects, and control regions. Size and eccentricity (Ecc.) are shown in pixels, and degrees of visual angle are shown in parentheses. Furthermore, saliency (Sal.), luminance contrast (LumC.), and edge-content information (EdgeC.) are presented. Notes: H, texts in front of homogenous background; INH, texts in front of inhomogenous background.

	Size	Ecc.	Sal.	LumC.	EdgeC.
Experiment 1
Text	2,631 (2.92)	283 (9.43)	0.39	40	0.65
Non-text	2,828 (3.14)	292 (9.73)	0.40	40	0.64
Con. region	2,631 (2.92)	283 (9.43)	0.35	46	0.53
Experiment 2
Erased text	2,631 (2.92)	283 (9.43)	0.41	21	0.48
Non-text	2,676 (2.97)	293 (9.77)	0.41	24	0.57
Con. region	2,631 (2.92)	283 (9.43)	0.35	36	0.45
Experiment 3
UncText H B	2,351 (2.61)	288 (9.60)	0.20	10	0.22
UncText INH B	2,723 (3.03)	281 (9.37)	0.36	55	0.59
UncText H	2,351 (2.61)	288 (9.60)	0.25	34	0.43
UncText INH	2,723 (3.03)	281 (9.37)	0.36	57	0.69
Non-Text H	2,670 (2.97)	301 (10.03)	0.28	34	0.53
Non-Text INH	2,746 (3.05)	284 (9.47)	0.38	57	0.69
Con. region H	2,351 (2.61)	287 (9.57)	0.26	40	0.50
Con. region INH	2,723 (3.03)	281 (9.37)	0.37	56	0.61