12. The device as described in claim 9 , wherein: the pre-processing of the text information further comprises: identify a text block with a maximum height; and select a fraction of a height of the text block with the maximum height as the threshold.
12. The device as described in claim 9 , wherein: the pre-processing of the text information further comprises: identify a text block with a maximum height; and select a fraction of a height of the text block with the maximum height as the threshold. 15. The device as described in claim 12 , wherein the text style comprises: font, font size, line height, bold or not, italics or not, colored font, background color, or any combination thereof.