A posed picture can be referred to as non-candid, or a portrait.
A Picture Framer
A picture on a wall could be a mural, a painting, a photograph. It depends on the picture.
composition
composition
A picture on a wall could be called a mural, a painting, a photograph.
A picture symbol is called an emoticon. Examples: :) =) :D ;) =P
A mural
mural
The graphic
A Photograph
A photograph.
Wallpaper or a desktop background