Imaging has a long history, punctuated by major development milestones through the centuries. The invention of oil paint allowed an increase in image-tone scale; the invention of optical lenses allowed for magnification of images useful to biological and astronomical research; the invention of the photographic process allowed images to be stored and shared. Now we are in an era of digital imaging in which we are experiencing explosive growth in the capabilities and applications of imaging technology. Developments in computer-processing power, data-transmission speed, compression techniques, wireless networks, and mobile imaging devices expand the ways we create and share imagery. In just a few short years, we have experienced the introduction and increasing use of cell-phone cameras, print-on-demand photobooks, high-dynamic-range displays, electronic paper, and 3-D capabilities in printing, display, and cinema. Digital imaging has become woven into the fabric of our society.