Abstract: A color coding engine and a comparison engine are provided. A color coding engine may be utilized to detect logical layout object attributes in a flow format document and apply a unique color to textual elements associated with each logical layout object attribute. The resulting color coded document may be saved as a target flow format document. The target flow format document may be converted to a fixed format document and then converted by a conversion engine to a flow format document. The resulting converted flow format document may be saved as an output flow format document. A comparison engine may be utilized to compare the output flow format document and the target flow format document to determine if layout information has been properly preserved in the document conversion process.

Abstract: A color coding engine and a comparison engine are provided. A color coding engine may be utilized to detect logical layout object attributes in a flow format document and apply a unique color to textual elements associated with each logical layout object attribute. The resulting color coded document may be saved as a target flow format document. The target flow format document may be converted to a fixed format document and then converted by a conversion engine to a flow format document. The resulting converted flow format document may be saved as an output flow format document. A comparison engine may be utilized to compare the output flow format document and the target flow format document to determine if layout information has been properly preserved in the document conversion process.

Abstract: Detection of right-to-left text direction, left-to-right text direction, ligatures and diacritics in fixed format documents for reconstruction of fixed format documents into flow format documents is provided. Each text run of a fixed format document is analyzed for directionality. If text runs contain ligatures, the ligatures are mapped to corresponding characters for proper reading order of the ligatures in context with other characters comprising a text run in which the ligatures are situated or neighboring the ligature. Each text run is collected based on determined text directionality for reconstruction in a flow format document. Proper text directionality for columns of text is determined in the same manner as proper text directionality for text runs in paragraphs of text. If diacritics are present in association with one or more characters or glyphs, a determination may be made as to a carrier character or glyph associated with each diacritic.

Abstract: A fixed format document conversion engine and associated method for converting a fixed format document into a flow format document. The fixed format document conversion engine includes a sequence of layout analysis engines and semantic analysis engines to analyzes the base physical layout information obtained from the fixed format document to enrich, modify, and classify the physical layout information into progressively more advanced physical layout information and, ultimately, semantic layout information. The semantic layout information is mapped and serialized into a selected flow format document with a high level of flowability.