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AssigneeSony Corporation
InventorsKeigo Ihara, Junichi Rekimoto, Shinji Nakajima, Takahiko Sueyoshi
Estimating the term…
A two-dimensional code recognition processing method for recognizing a two-dimensional code made of a plurality of square cells arranged in accordance with predetermined layout rules. The method comprises the steps of: generating binary data from image information acquired externally in accordance with a predetermined threshold value; detecting a reference cell serving as a reference in recognizing the two-dimensional code based on the binary data generated in the binary data generating step; detecting corner cells each located in a predetermined search range with respect to the reference cell detected in the reference cell detecting step, on the basis of the binary data generated in the binary data generating step; and detecting code data assigned to the two-dimensional code existing inside an area of a code part enclosed by the reference cell and by the corner cells on the basis of the binary data generated in the binary data generating step.
A two-dimensional code recognition processing method for recognizing a two-dimensional code comprising the steps of:
A two-dimensional code recognition processing method for recognizing a two-dimensional code made of a plurality of cells arranged in accordance with predetermined layout rules, the method comprising the steps of:
A two-dimensional code recognition processing method for recognizing a two-dimensional code made of a plurality of cells arranged in accordance with predetermined layout rules, the method comprising the steps of:
A two-dimensional code recognition processing apparatus for recognizing a two-dimensional code comprising:
A two-dimensional code recognition processing apparatus for recognizing a two-dimensional code made of a plurality of cells arranged in accordance with predetermined layout rules, the apparatus comprising:
A storage medium for storing a two-dimensional code recognition processing program for recognizing a two-dimensional code, the program being executable by a computer and comprising the steps of:
A storage medium for storing a program for recognizing a two-dimensional code made of a plurality of cells arranged in accordance with predetermined layout rules, the program comprising the steps of:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
By electromagnetic radiation, e.g. optical sensing; by corpuscular radiation: using light without selection of wavelength, e.g. sensing reflected…
The method being specifically adapted for the type of code: 2D bar codes
Including a method step for retrieval of the optical code: locating of the code in an image
With optically detectable marking: multi-dimensional coding
Term ended 28 Jun 2019 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to a two-dimensional code recognition processing method, a two-dimensional code recognition processing apparatus, and a storage medium for allowing a computer to execute a two-dimensional code recognition processing program. More particularly, the invention relates to a two-dimensional code recognition processing method, a two-dimensional code recognition processing apparatus, and a storage medium for allowing a computer to execute a two-dimensional code recognition processing program, the method and the apparatus providing efficient and accurate recognition of code data based on image data of a suitably captured two-dimensional code.
The so-called bar code system is used extensively in various industrial fields. The system involves encoding in bars alphanumeric characters representing types and conditions of goods and articles, and typically attaching such codes to the goods and products so that the codes may be scanned later for retrieval of relevant information (e.g., about their types and conditions).
FIG. 20 shows a so-called one-dimensional bar code. In this example, a bar code label 500 is made up of a code part 501 and an ID (identification number) part 502. The code part 501 is a combination of different widths of bars (in black) and bar-to-bar gas (blanks). The ID part 502 indicates a code contained in the code part 501. Specifically, the ID part 502 shows as readable information alphanumeric characters that are coded in the code part 501. This type of one-dimensional bar code 500 is scanned by an optical recognition apparatus called a bar code scanner for recognition.
FIG. 1 is a schematic view showing a personal computer 1 to which the invention is applied;
FIG. 2 is an explanatory view of two-dimensional code specifications;
FIG. 3 is another explanatory view of two-dimensional code specifications;
Preferred embodiments of this invention are described below. Means and steps claimed as constituting the invention will be described below using specific examples in parentheses where appropriate. However, such specifics are only for illustration purposes and are not limitative of the invention.
FIG. 1 shows a personal computer 1 to which the invention is applied. In this example, an object 100 is illustratively a business card-like object. A two-dimensional code label 101 is attached (e.g., printed) onto the object 100.
As depicted in FIG. 2, the two-dimensional code label 101 is made of a plurality of square cells (black portions) arranged two-dimensionally in accordance with predetermined layout rules. Such a layout pattern of the cells represents in coded form alphanumeric characters, such as a number 200 in this example.