Mixed code, and method and apparatus for generating the same, and method and appratus for decoding the same

Abstract

A mixed code, and a method and apparatus for encoding the same are provided. The mixed code includes a first code image region storing a first code image obtained by encoding first information using color, shading, or a combination thereof, and a second code image region storing a second code image obtained by encoding second information using color, shading, or a combination thereof. The first code image and / or the second code image includes the results of encoding interpretation information, construction information, error control information, and code direction information. The mixed code is made by adjusting the difference in color and brightness between the first and second code images to a predetermined level and combining these images. Also Provided are a method and apparatus for decoding a mixed code that is a combination of first and second code images. In the method, a mixed code image is obtained by receiving the original image having the mixed code image and removing noise from the original image. Next, the colors, shades, and brightnesses of pixels of the mixed code image are categorized into groups based on a predetermined threshold, the mixed code image is divided into first and second code images, and first and second information are extracted by decoding the first and second code images, respectively. The first and second code images can be effectively decoded by decoding interpretation information, construction information, error control information, and code direction information stored in the first and / or second code images.

Description

technical field [0001] The present invention relates to a code that is a combination of at least two code images (hereinafter referred to as "mixed code"), and a method and apparatus for generating the mixed code. Furthermore, the present invention relates to a method and a device for decoding a physical or electronic code image, and more particularly, the present invention relates to a method and a device for decoding a code which is a combination of at least two code images. Background technique [0002] Recognizable information such as characters, numbers, and marks may be expressed as images in consideration of information security and the space in which the information is to be displayed. In order to decode such an information-containing image (coded image), a decoder is required. [0003] The code image can be a one-dimensional barcode, such as Universal Product Code (UPC) and European Article Number (EAN: European Article Number), or a two-dimensional code, such as c...

AI Technical Summary

Problems solved by technology

Therefore, generally, whenever the image data is updated, the image code must be regenerated, and it is difficult to include such information indicating whether the data is updated into the image code

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