The principles of honesty, utility and simplicity guided the Shakers and manifested in their craftsmanship. They rejected ornamentation as it encouraged the sin of pride. Instead, the Shaker furniture makers played with form, proportions, and asymmetry to add visual interest. Though the Shaker communities were largely self-sufficient and closed off from the mainstream world, they did sell excess goods and furniture pieces beyond their community. Fortunately, the style and historical pieces have been preserved and even reinterpreted today. — Quelcy
Computer vision systems rely on image sensors which detect electromagnetic radiation which is typically in the form of either visible light or infra-red light . The sensors are designed using solid-state physics . The process by which light propagates and reflects off surfaces is explained using optics . Sophisticated image sensors even require quantum mechanics to provide a complete understanding of the image formation process. Robots can also be equipped with multiple vision sensors to be better able to compute the sense of depth in the environment. Like human eyes, robots' "eyes" must also be able to focus on a particular area of interest, and also adjust to variations in light intensities.