Patent ID: 9508031
Filing Date: 2016-11-29
CPC Classification: G06K,H04N

Claim Text:
1. A non-transitory computer readable medium storing a computer program for executing by a computer system a computer implemented process for generating 1-bit image data for a colour image having more than one colour, the 1-bit image data comprising at least two sets of pixel values, each set corresponding to a respective component colour of the colour image, the computer implemented process comprising the steps of: (a) receiving multiple-bit image data comprising multiple-bit pixel values; (b) deriving from said multiple-bit pixel values a first and second set of 1-bit image data comprising “on” and “off” pixel values; and (c) printing from the 1-bit image data the colour image comprising corresponding first and second sets of dots, the dots of each set being of a respective one of the component colours, each of all of the dots of one of the colours of dots being within a respective site selected from a first set of predetermined possible sites, and each of all of the dots of the other colour of dots being constrained to be within a respective site selected from a second set of predetermined possible sites, wherein the possible sites of the first and second sets of possible sites overlap so that individual dots of one colour of dots can overlap dots of the other colour of dots, and wherein the possible sites of one set are of different dimensions from the sites of the other set so that individual dots of one colour cannot fully cover individual dots of the other colour, wherein the possible sites have the same shape and size, the possible sites having different dimensions by virtue of the sites of the first set of possible sites having a different orientation from the sites of the second set of possible sites.