Patent ID: 11956402
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 3:
4. A method according to claim 1, wherein:
each non-binary pixel of the greyscale image comprises a plurality of non-binary sub-pixels and the method further comprises:
determining a grey level for each non-binary pixel, the grey level being the average of the grey levels of the non-binary sub-pixels of that non-binary pixel;
wherein determining an indication of a target number of non-binary binary pixels per grey level comprises dividing the number of non-binary sub-pixels in the greyscale image by an estimate of the second number of grey levels to determine a target number of non-binary sub-pixels per grey level; and
wherein allocating a new grey level to each non-binary pixel comprises allocating, on average, the target number of non-binary sub-pixels to each grey level.