11. The computer program product of claim 7 , wherein the image search identifies a new image in a data source of the one or more data sources that includes the context and the partial text string.
7. A computer program product, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code executable by at least one processor to perform: utilizing an Optical Character Reader (OCR) to extract a text string from an image; analyzing context within the image; determining that the extracted text string is a partial text string based on the context using text coherence; and for a first radius level of a plurality of radius levels around the partial text string, identifying a segmented sub-image around the partial text string within the first radius level; performing an image search on the segmented sub-image to identify a candidate text string by: searching one or more data sources for an image that includes the partial text string and the context; and identifying a longer text string that includes the partial text string as the candidate text string; determining whether the candidate text string is a complete text string based on the context; and in response to determining that the candidate text string is the complete text string, providing the complete text string for performing an action.