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.
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. 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.