The document discusses visual communication and principles of visual perception. It describes the purposes and functions of images as informative, communicative, expressive, and aesthetic. Two principles are explained: the relationship between figure and ground, and the law of good form which states that perception seeks the simplest form of organization. Different types of images like photographs, paintings, and digital images are mentioned. Visual communication is said to be versatile, attention-grabbing, and aid in messaging through stories and association. Design principles of unity, balance, hierarchy, and scale are also noted.