Patent ID: 8670157

Claim:
A method for processing isolated dots of an image to be printed by a printer, comprising: detecting whether one or more pixels corresponding to an isolated dot in the image are in an on state, the on state defined by a higher binary logic level relative to a binary logic level corresponding to an off pixel; determining a first sum of pixels that are in an on state in a first pixel ring surrounding the one or more pixels corresponding to the isolated dot when the one or more pixels in the isolated dot are detected to be in the on state; comparing the first sum of pixels in the first pixel ring that are in the on state with a first threshold sum; turning on a first number of one or more pixels in at least a second pixel ring either comprising of or surrounding the one or more pixels corresponding to the isolated dot when the first sum of pixels in the on state is less than the first threshold sum, wherein the second pixel ring is inside the first pixel ring; and outputting the isolated dot including the turned on first number of pixels in the second pixel ring on a printable medium as an output image.