Stereoscopic imaging uses two slightly different images taken from slightly different angles to create the illusion of depth when viewed through special viewers or displays. The document discusses the history of stereoscopic imaging from the 1833 invention of the first stereoscope to modern digital techniques. It describes how stereoscopy works by simulating the different perspectives seen by the left and right eyes. The document outlines various techniques for capturing, viewing, and displaying stereoscopic images including film and digital photography, anaglyph, polarized, and autostereoscopic viewing methods. Applications of stereoscopic imaging span entertainment, education, medicine, and space exploration.