Photo captions, also known as cutlines, are a few lines of text used to explain and elaborate on published photographs. In some cases captions and cutlines are distinguished, where the caption is a short (usually one-line) title/explanation for the photo, while the cutline is a longer, prose block under the caption, generally describing the photograph, giving context, or relating it to the article. [1]
Captions can also be generated by automatic image captioning software.