ABSTRACT
This chapter addresses the important omissions concerning linearity and color formation in conventional color cameras. The Color Filter Array formats from either photographic cameras or one shot color CCDs retain the individual adjacent sensor element values, each individually filtered by red, green or blue filters. In contrast, a conventional RGB color image has three channels, with red, green and blue values for a single pixel position in the image. Star alignment works on an RGB color image, in which each pixel is an interpolated value of its neighbors. After registration, integration does likewise, outputting a RGB file. Drizzle is a technique famously used to enhance the resolution of the Hubble Space Telescope's images, by combining many under-sampled images taken at slightly different target positions. This technique can recover much of an optical system's resolution that is lost by a sensor with coarse pixel spacing.
