18. The apparatus of claim 13 , wherein the plurality of text region detectors is configured to determine a region confidence value for each text region of the at least one text region.
18. The apparatus of claim 13 , wherein the plurality of text region detectors is configured to determine a region confidence value for each text region of the at least one text region. 19. The apparatus of claim 18 , wherein the plurality of text region detectors is further configured to identify a location for each text region of the at least one text region, and wherein the merging unit is configured to: in response to a determination that two or more text regions of the at least one text region are identified in two or more of the plurality of grayscale images and that the identified locations of at least two of the identified text regions overlap at least in part, select one of the at least two overlapping text regions as a selected text region; and recognize text in the selected text region.