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US 12,583,246 B2Granted
Printing apparatus and method for forming printed images having glossiness
AssigneeRiso Kagaku Corporation
InventorsTadashi Takakusa, Shoji Naramoto
Life of this patent
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Abstract
A printing apparatus includes: a gloss forming unit that forms at least two regions having different gloss levels on a print medium; and a print image forming unit that forms a print image on the at least two regions having different gloss levels of the print medium after the gloss forming unit forms the at least two regions.
Claims10
A printing apparatus, comprising:
- a gloss forming unit having inkjet heads that eject a gloss solution that forms at least two regions having different gloss levels on a print medium;
- and
- a print image forming unit that forms a print image on the at least two regions having different gloss levels of the print medium after the gloss forming unit forms the at least two regions, wherein
- the gloss forming unit generates gloss level data based on a luminosity of image data that represents the print image, and employs the gloss level data to form the at least two regions having different gloss levels, and
- the gloss forming unit calculates the luminosity of each pixel that constitutes the image data based on red gradation values, green gradation values, and blue gradation values of each pixel and the formula below:
- Luminosity=(coefficient kr·red gradation value)+(coefficient kg·green gradation value)+(coefficient kb·blue gradation value.
3 more elements
A printing method, comprising:
- forming at least two regions having different gloss levels by ejecting a gloss solution;
- and
- forming a print image on the at least two regions after the at least two regions are formed,
- wherein the method further comprises:
- generating gloss level data based on a luminosity of image data that represents the print image, and forming the at least two regions having two different gloss levels by employing the gloss level data,
- calculating the luminosity of each pixel that constitutes the image data based on red gradation values, green gradation values, and blue gradation values of each pixel and the formula below:
- Luminosity=(coefficient kr·red gradation value)+(coefficient kg·green gradation value)+(coefficient kb·blue gradation value).
4 more elements
Dependencies are inferred from the claim text.