Two-dimension code reader and reading method, portable terminal and digital camera

Abstract

When a two-dimensional code having data cells (referred to as DC) comprising two-dimensional data, positioning finder patterns (referred to as FP) and an alignment pattern (referred to as AP) is input, the positions of FP are detected by evaluating the proximity from patterns in three horizontal, vertical and inclined directions. The position of AP is detected by conducting the template matching after the rotation correction of part of the input image. The version of the code is determined by calculation of the number of cells from the widths and positions of FP. Coordinate conversion expressions for converting the positions of DC into their coordinate positions based upon the positions of FP and AP and the version are determined and DC are cut out. The array of the cut out DC is decoded for reading the two-dimensional code.

Description

technical field [0001] The present invention relates to a 2D code reading device, a 2D code reading method, a 2D code reading program, a recording medium for the program, a portable terminal, and a digital camera. A 2D code reading device for reading a 2D code, a 2D code reading method, a 2D code reading program, and a recording medium for the program. Background technique [0002] In recent years, mobile phones with built-in cameras have become widespread. In the above-mentioned mobile phone with a camera, etc., when using the camera to take pictures of the two-dimensional code and read the information recorded in the two-dimensional code, in the general mobile phone with low processing capacity, etc., from the aspect of processing capacity It is considered that it is necessary to make it possible to read a two-dimensional code by a method with a small amount of processing. [0003] As an example of a two-dimensional code, there is a QR code (Quick Response Code) which is...

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