A PHOTOGRAPHIC IMAGE is a product or confluence of
three components as captured within a frame.
The three components can be described as
SUBJECT, CONTENT and FORM.
SUBJECT can be defined as to what image is about.
CONTENT as subject matter can also be defined as those persons, places or things that are visibly
present and/or identifiable in the image. When the subject (or theme) and content (or subject matter) are understood as separate yet interdependent image components, photographers can combine them more accurately to convey meaning.
FORM is the organizational structure, the way an image is composed, in order to USE CONTENT to communicate about a SUBJECT.
And that is Photography 101