Image processing method and image processing apparatus

摘要

In image processing, for a pixel with a density level smaller than a predetermined threshold value, the density level is corrected based on a parameter representing a degree of condensation of ink in a nozzle. For pixel with a density level equal to or larger than the predetermined threshold value, the density level is not corrected. This makes it possible to suppress an unevenness in density caused by the condensation of ink while suppressing blur at a contour of a character or a thin line.

主权项

1. An image processing method for recording an image on a recording medium by performing relative scanning between the recording medium and a recording head including a nozzle configured to discharge ink, comprising:
determining multilevel recording data such that when a multilevel data value corresponding to a first pixel on the recording medium is equal to or larger than a predetermined threshold value, the multilevel data value is employed as a value of the multilevel recording data, while when the multilevel data value is smaller than the predetermined threshold value, the multilevel data value is corrected based on a first parameter representing a degree of condensation of ink when the first pixel is recorded by a nozzle assigned to record the first pixel, and the corrected multilevel data value is employed as the value of the multilevel recording data; and generating a second parameter based on the determined value of the multilevel recording data and the first parameter, the second parameter representing a degree of condensation of ink in the nozzle used in recording the first pixel when a second pixel is recorded by the nozzle next after the first pixel.