A parable about the possible dehumanizing effects of photography...(2)
Psychedelic colors make the 'real' world of the film seem exaggerated and hyperbolic like a fantastic 'surface' reality, while the 'captured' and reconstructed world of the photographs appears ominously stark, grainy, and documentary-like -- the bare, denuded 'essence' of reality. In the central montage sequence of the film, the camera -- in place of Thomas' eyes -- slowly moves back and forth from one photograph to the next, and likewise, Antonioni cuts back and forth from the pictures to the protagonist looking at them.
Since the act of looking at these enhanced images effectively reconstructs an event that the protagonist -- and the audience -- never actually saw with the naked eye in 'real life,' technology is shown to reveal a new surface of the world that is normally hidden from view. Antonioni's own particular brand of phenomenological Neorealism is concerned primarily with the process of seeing through a camera as a way of exposing an ultimate truth, or a lack thereof, that underlies the surface of the world.
The curious self-reflexivity of this scene is an epistemological hall of mirrors: Antonioni's camera looks at Thomas looking at photographs which are blown up larger and larger so that eventually they become merely an abstract collection of dots, a Rorschach test in which almost anything can be read. Like the Abstract Expressionist paintings of the tormented artist son in Pasolini's TEOREMA (1968), the received cultural baggage and semiotic referentiality of the image is eliminated until all that remains is purest subjectivity of the spectator.
And so, picture-making technology mediates reality only up to a point: once the threshold of referentiality has been crossed, the suspicion of a murder in the park gleaned from a series of enlarged photographs would seem to say more about Thomas' own paranoid state of mind than what his camera may or may not have recorded.