Methods and execution programs for reading and displaying a two-dimensional code
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Abstract
A method for reading and displaying a two-dimensional code is to enable the display of digital information with high cell density and to enable an accurate reading of digital information, while responding to the various conditions. An image pattern that can be distinguished from surrounding cells is detected from an image data containing the two-dimensional code by verifying an image on the image data with a predetermined verification pattern. The detected image pattern includes the image of one or more data marks.
68 Citations
30 Claims
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1-16. -16. (canceled)
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17. A program of instructions executable by a computer to perform a function for reading a two-dimensional code with digital information expressed by data marks displayed on a plurality of cells arrayed two-dimensionally, the program of instructions comprising:
detecting from an image data containing the two-dimensional code, an image pattern that can be distinguished from surrounding cells by verifying an image on the image data with a predetermined verification pattern, wherein the detected image pattern includes the image of one or more data marks. - View Dependent Claims (18, 19, 20, 21)
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22. A program of instructions executable by a computer to perform a function for reading a two-dimensional code with digital information expressed by data marks displayed on a plurality of cells arrayed two-dimensionally, the program of instructions comprising:
detecting from a colored image data containing the two-dimensional code consisting of pixels each having a plurality of color components, an image pattern that can be distinguished from surrounding cells by verifying an image on the colored image data with a predetermined verification pattern for each of the plurality of color components of each pixel, wherein the detected image pattern includes the image of one or more data marks.
- 23. A program of instructions executable by a computer to perform a function for generating a two-dimensional code with digital information expressed by data marks on a plurality of cells arrayed two-dimensionally, wherein the data marks on each cell are displayed in layers of a plurality of color components of an output device, with each data mark surrounded by a blank area where none of the plurality of color components of the output device is output.
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28. A program of instructions executable by a computer to perform a function for reading a two-dimensional code with digital information expressed by data marks displayed on a plurality of cells arrayed two-dimensionally, the program of instructions comprising:
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detecting an image pattern displayed on a specific position by verifying an image on an image data containing the two-dimensional code with a predetermined verification pattern; and
obtaining image information from the image of the detected image pattern to use it to determine how the cells are displayed. - View Dependent Claims (29, 30)
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Specification