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AssigneeSharp Kabushiki Kaisha
InventorHajime Shimizu
Estimating the term…
Coordinate positions of four points are detected from a captured two-dimensional code image. The two-dimensional code size and coefficients of equations are determined for coordinate positions corresponding to center positions of respective cells compensated for inclination of the image by adding depth information. The coordinate positions of respective cell center positions are determined according to the calculation equations by applying the determined coefficients. Brightness/darkness is discriminated from image data corresponding to the respective cell center positions and binary data (0 or 1) for respective cells are generated. Two-dimensional code information is reproduced based on the binary data. The equations are expressed by recurrence formulas. The coefficients determined from the coordinate positions are divided by the same constant to make them integers.
A two-dimensional code reading method comprising processing steps of:
A two-dimensional code reading method comprising processing steps of:
A two-dimensional code reading device comprising:
The two-dimensional code reading device as defined in clam 12, wherein a constant for dividing the coefficients symbolically determined for the image position calculating equations a selected from constants frequently and commonly used in the image position calculating equations is used to divide and convert the coefficients to smaller in size coefficients to make the two-dimensional code readable.
Dependencies are inferred from the claim text.