Method of dithering for high-speed single-pass printing

A method of single-pass printing using a printing system comprising at least first and second aligned printheads supplied with a same ink, the second printhead being downstream of the first printhead, the method comprising the steps of:

• receiving first and second halftone images at the first and second printheads, respectively;
• printing the first halftone image from the first printhead;
• and
• printing the second halftone image from the second printhead such that a resulting printed image contains the second halftone image interleaved with the first halftone image, wherein:
• the printed image is printed at a first resolution in a printing direction;
• the first and second halftone images have a second resolution in the printing direction, the second resolution being less than the first resolution;
• the first halftone image is based on a first dither mask and the second halftone image is based on a second dither mask, the first dither pattern mask being different than the second dither mask.