Denotation- what is pictured
Example: A photo of a flower represents a flower and nothing else. It is a real replication of the actual object. With multiple images of a flower, the idea and object is the same; a flower.
Connotation- how it is pictured
By changing the way we view the picture things such as light, framing, etc can be displayed. Changing the color to black and white, to sepia, or making the contrast super intense and also change the picture and how it is read it.