Image processing apparatus, image processing method, and storage medium
US9661181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2015 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Dec 16, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus has a data acquisition unit that acquires first multi-valued data for a first ink that is not black ink and second multi-valued data for a second ink that is black ink; a threshold value acquisition unit that acquires a threshold value from a threshold value matrix; an offsetting unit that offsets at least one of the threshold value and the second multi-valued data; and a generating unit that generates first quantized data for the first ink by comparing the first multi-valued data and the threshold value, and generate second quantized data for the second ink by comparing the second multi-valued data and the threshold value with offset by the offsetting unit. Dispersibility of dots printed at positions corresponding to threshold values from a minimum value to a predetermined value is higher than that corresponding to threshold values except from the minimum value to the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.