HALFTONE IMAGE PROCESSING METHOD

A halftone image processing method for providing image information in a bit distribution by specifying a matrix pattern in response to tone data which is indicative of a recording density. Several matrix pattern groups are prepared each comprising matrix patterns which are larger in number than dots which define a dot matrix. The matrix pattern groups are provided with density characteristics different from each other. One of the groups is specified in conformity to a required density characteristic, while one of the matrix patterns in the specified group is specified in response to tone data. Any one of various modes of tone representation is selectable and, in addition, numerous tones may be rendered to enhance smooth representation of tones.