Image processing apparatus, image processing method and program
US-2015371123-A1 · Dec 24, 2015 · US
Halftone screen
US8934142B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934142-B2 |
| Application number | US-201313873483-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2013 |
| Priority date | Apr 30, 2013 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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A halftone screen may be used to transform a continuous tone image into a halftone image. Determining the halftone screen may include determining a first halftone tile for a first gray level, selecting pixel locations and increasing the intensity of pixels at the locations to activate the pixels to form a second halftone tile for a subsequent gray level. A filtered image may be generated from the second halftone tile, and pixels from the filtered image may be used to generate the halftone screen.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of determining a halftone screen for use in transforming a continuous tone image into a halftone image, the method comprising the steps of: (a) determining a first halftone tile for a first gray level, the first halftone tile comprising a plurality of pixels locations; (b) selecting a plurality of the pixel locations to form a pixel pool; (c) selecting a subset of pixel locations from the pixel pool; (d) increasing intensity of pixels at…
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- H04N1/4051Primary
Electricity · mapped topic
- H04N1/4055Primary
Electricity · mapped topic
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- What does patent US8934142B2 cover?
- A halftone screen may be used to transform a continuous tone image into a halftone image. Determining the halftone screen may include determining a first halftone tile for a first gray level, selecting pixel locations and increasing the intensity of pixels at the locations to activate the pixels to form a second halftone tile for a subsequent gray level. A filtered image may be generated from t…
- Who is the assignee on this patent?
- Hewlett Packard Indigo Bv
- What technology area does this patent fall under?
- Primary CPC classification H04N1/4051. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).