16. The apparatus of claim 15 , wherein the plurality of text region detectors is further configured to add the common portion to at least one candidate text region to create an adjusted candidate text region.
15. The apparatus of claim 13 , wherein the plurality of text region detectors is configured to: identify at least one non-candidate text region in the plurality of grayscale images; and in response to two or more non-candidate text regions of the at least one non-candidate text region being identified in two or more of the plurality of grayscale images, identify a common portion of the two or more non-candidate text regions.