A high-resolution mipmap image is used for high-density samples, such as for objects close to the camera lower-resolution images are used as the object appears farther away. They are intended to increase rendering speed and reduce aliasing artifacts. The height and width of each image, or level, in the mipmap is a factor of two smaller than the previous level. In computer graphics, mipmaps (also MIP maps) or pyramids are pre-calculated, optimized sequences of images, each of which is a progressively lower resolution representation of the previous. JSTOR ( June 2009) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.