Figure 4.

iPad user interface and structured semantic annotation information. (A) The iPad annotation screen (left) is a simple text box into which the user types their image observations (middle panel). Ontologies such as RadLex linked to iPad provide visual feedback, such as prompting for the appropriate controlled terms for the user entry (right) or possible misspellings (highlighted terms in iPad annotation screen). (B) Users can view the structured semantic image annotation data in an expandable tree, organized according to types of image metadata iPad collects.