Optical symbol, information processing device, and code reading method
US-2023342576-A1 · Oct 26, 2023 · US
Optical symbol, information processing device, and code reading method
US12039399B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12039399-B2 |
| Application number | US-202318189421-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 24, 2023 |
| Priority date | Apr 21, 2022 |
| Publication date | Jul 16, 2024 |
| Grant date | Jul 16, 2024 |
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Abstract
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An optical symbol includes a data portion in which a plurality of cells is arranged. Each of the plurality of cells is assigned with a linear gradient according to a value.
First claim
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The invention claimed is: 1. A color code, comprising: a data portion in which a plurality of cells is arranged, each of the plurality of cells being assigned with a color gradient according to a value, the color gradient having a degree of hue which gradually changes in a predetermined direction within the each of the plurality of cells. 2. The color code of claim 1 , wherein the color gradient has the degree of hue which gradually increases in the predetermined direction within the each of the plurality of cells. 3. The color code of claim 2 , wherein the predetermined direction is one of four directions along two orthogonal axes. 4. The color code of claim 3 , wherein the predetermined direction of the color gradient is determined based on a classification of the value. 5. The color code of claim 2 , wherein the predetermined direction includes a plurality of directions, and the data portion has a characteristic represented by a combination of the plurality of directions of a plurality of color gradients each of which is assigned to a corresponding one of the plurality of cells. 6. The color code of claim 1 , wherein the data portion has a quadrilateral shape in which the plurality of cells are two-dimensionally connected to each other, each of the plurality of cells having a square shape. 7. The color code of claim 6 , wherein each of the plurality of cells is in contact with an adjacent one or more of the plurality of cells. 8. The color code of claim 1 , wherein each of the plurality of cells has a square shape with four sides, and the color gradient has the degree of hue which gradually changes from one of the four sides to another one of the four sides in the each of the plurality of cells. 9. An information processing device comprising circuitry configured to: detect an area having a predetermined shape from a captured image including a color code; extract a characteristic pattern based on a color gradient of the color code included in the area; select the area in which the characteristic pattern matches a predetermined pattern; and identify a code based on the color gradient included in the area, wherein the color code includes a data portion in which a plurality of cells is arranged, each of the plurality of cells being assigned with the color gradient according to a value, the color gradient having a degree of hue which gradually changes in a predetermined direction within the each of the plurality of cells. 10. A code reading method, comprising: detecting an area having a predetermined shape from a captured image including a color code; extracting a characteristic pattern based on a color gradient of the color code included in the area; selecting the area in which the characteristic pattern matches a predetermined pattern; and identifying a code based on the color gradient included in the area, wherein the color code includes a data portion in which a plurality of cells is arranged, each of the plurality of cells being assigned with the color gradient according to a value, the color gradient having a degree of bue which gradually changes in a predetermined direction within the each of the plurality of cells.
Assignees
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Classifications
- G06K19/06037Primary
multi-dimensional coding · CPC title
- G06K7/1417Primary
2D bar codes · CPC title
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Frequently asked questions
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- What does patent US12039399B2 cover?
- An optical symbol includes a data portion in which a plurality of cells is arranged. Each of the plurality of cells is assigned with a linear gradient according to a value.
- Who is the assignee on this patent?
- Katayama Hiroshi, Tsukahara Mina, Ricoh Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G06K19/06037. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 16 2024 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).