Patent ID: 8842340

Claim:
A printing system comprising: a host device; and a printer which performs printing by using dot data indicating presence/absence of dot formation for each pixel, wherein the host device includes: a pseudo pixel generating portion which groups a plurality of pixels to generate pseudo pixels; an assigning portion which assigns representative values to which color specification values of pixels constituting the pseudo pixels are reflected to the respective pseudo pixels including no edge in the pseudo pixels; a host halftone processor which executes halftone processing on the pixels constituting the pseudo pixels including the edges in the pseudo pixels to generate the dot data; and a transfer portion which transfers the representative values assigned by the assigning portion and the dot data generated by the host halftone processor to the printer, and the printer includes: a printer halftone processor which executes halftone processing on the representative values transferred from the host device to generate the dot data; and a printing portion which performs printing by using the dot data generated by the printer halftone processor and the dot data transferred from the host device.