Patent ID: 7894096

Claim:
An image-forming method for forming images on a recording medium based on image data by arranging image elements in lines along a main scanning direction to form main scan lines, comprising: receiving image data including one set of main scan line data, the one set of main scan line data being one line worth of data indicative of a single main scan line image extending in the main scanning direction; determining whether or not to execute a division process on the one set of main scan line data; dividing, when it is determined to execute the division process, the one set of main scan line data into N number of sets of partial line data, where N is an integer greater than or equal to 2, the N number of sets of partial line data indicating N number of partial line images, each of which extends in the main scanning direction, at least one of the N number of partial line images being shifted from another remaining partial line image in a sub-scanning direction that is substantially orthogonal to the main scanning direction; and forming, with an image-forming device, the single main scan line image based on the one set of main scan line data when it is determined not to execute the division process, and forming, with the image-forming device, the N number of partial line images based on the N number of sets of partial line data when the one set of main scan line data is divided into the N number of sets of partial line data.