Explanation : Denotation is the basic ingredient of a term,
a visual or a sign on which there is general
agreement, e.g., everyone can see the facial
features in a portrait.
The second layer contains the picture's
implication, hint or connotation(s). Connotations
are always multiple. As smiling face may connote
friendliness, confidence and joy. A straight face
may connote disinterestedness, disagreement or
lack of happiness.