1. A method for OCR-processing of a current frame in a video source, the method comprising: receiving, by a hardware processor, the current frame from the video source; retrieving, from a memory, prior frame data of a prior frame associated with the video source; detecting, by the hardware processor in at least a portion of the current frame, at least one current frame blob similar to at least one prior frame blob identified in the prior frame data; designating, by the hardware processor, the at least one current frame blob as at least one current character candidate without performing character candidate detection operations; and identifying, in the at least a portion of the current frame, at least one current text string using the at least one current frame blob.