The document discusses visual language and the elements of communication. It defines communication as the transmission of a message between a sender and receiver using a common code or convention. The key elements of communication identified are the sender, message, receiver, code, and channel. It then examines different types of visual languages including sonorous, written, gestural, tactile, and visual language. Specific examples are provided for each. The document also discusses concepts like the functions of visual language, levels of iconicity, signifier and signified, logos/icons/symbols, and the basic visual elements of dots, lines, planes, color, and texture. Exercises are provided to analyze images using these concepts.