For one-dimensional or two-dimensional images in which cells identified as bright-colored cells and cells identified as dark-colored cells are arranged in a matrix, the amount of information is further increased while the difficulty in reading information expressions are reduced. For this purpose, invented is a composite code comprising a first code, in which a plurality of cells each having a predetermined area are orderly arranged, and in which data is defined by each of the predetermined areas having one of two or more colors that can be distinguished from each other, and a second code in which special cells having an area other than the predetermined area form at least a part of the plurality of cells, and in which data is defined by distinguishable marks arranged at predetermined positions in the area other than the predetermined area.

Software tools disclosed herein may allow a user to enter design choices that alter an aesthetic appearance of a machine-readable label such that modules included in the label deviate from a standardized definition for the modules. Such alterations may include changes in size, color and orientation of modules. The alterations may allow a user to create machine-readable labels having unique aesthetic appearances. A software engine may ensure that, despite the aesthetic design choices entered by a user, the generated machine-readable label is reliably scannable.

Disclosed is a QR code extension method, comprising the following steps: S1. obtaining data encoding information, and determining the number of positioning points based on a data encoding length; S2. partitioning a data area according to different shapes, and adjusting a parameter of each data partition by adjusting the number of transverse and/or longitudinal unit QR codes; and S3, drawing a QR code, and outputting a result. The method is more flexible, and can make a QR code realize one-way or two-way extension, and the length and the width of a data area can be slightly adjusted to ensure that the capacity of the data area is close to the size of data information, so that capacity in per unit space is optimized.

A method and system for digital document security with embedded Quick Response (QR) codes. A Quick Response (QR) code with a digital picture is embedded in a digital document creating a secure digital document. The secure digital document with the embedded QR code helps to prevent tampering of the secure digital document. Upon scanning the QR code in the secure digital document, the contents of the digital document and the contents of digital picture are verified confirming the authenticity, integrity, non-repudiation and non-tampering of the contents of the digital picture and the secure digital document.

In an illustrative system, a point-of-sale scanner is equipped to respond to multiple different symbologies printed on a single product. The scanner captures many frames per second, as products are swiped through a viewing volume. Each frame is decoded, yielding one or more payloads. A reconciliation module compares each newly-decoded payload against a list of payloads previously output by the module, to determine if the current payload is semantically-equivalent to a previously-output payload. If so, the previously-output payload is output again, in lieu of the just-decoded payload. If no equivalent is found, the current payload is output and added to the list for comparison against future payloads. A great number of other features and arrangements are also detailed.

The present disclosure relates generally to signal encoding for containers such as shipping boxes, food containers, wrapped items such as pallets. One aspect of the technology relates to an image processing method for determining spatial dimensions of an encoded surface. The method comprises: obtaining an image depicting the encoded surface, in which the encoded surface comprises one or more raw data signal tiles printed thereon, with each tile comprising a side length N in inches or centimeters; detecting each of the one or more raw data signal tiles from the obtained image; determining a total number of tiles in a vertical direction, and determining a total number of tiles in a horizontal direction; determining a height and length of the encoded surface by multiplying each of the total number of tiles in a vertical direction and the total number of tiles in a horizontal direction by the side length N. Other aspects are described as well.

Disclosed is a QR code extension method, comprising the following steps: SI. obtaining data encoding information, and determining the number of positioning points based on a data encoding length; S2. partitioning a data area according to different shapes, and adjusting a parameter of each data partition by adjusting the number of transverse and/or longitudinal unit QR codes; and S3, drawing a QR code, and outputting a result. The method is more flexible, and can make a QR code realize one-way or two-way extension, and the length and the width of a data area can be slightly adjusted to ensure that the capacity of the data area is close to the size of data information, so that capacity in per unit space is optimized.

An object with an icon thereon encodes a bit sequence. The icon comprises a plurality of concentric rings, each of the plurality of concentric rings is divided into a plurality of data sectors. Each of the plurality of data sectors is associated with a corresponding bit in the bit sequence, and each of the plurality of data sectors encodes the corresponding bit based on the presence or absence of a line segment in the sector. The plurality of concentric rings further comprises at least three anchor sectors on one or more of the plurality of concentric rings, the at least three anchor sectors comprise an anchor mark. The plurality of concentric rings further comprises one or more error correction sectors, each of the one or more error correction sectors encodes a corresponding error correction bit based on the presence or absence of a line segment in the error correction sector.

Provided are a display method and a display device with which the display performance of a two-dimensional code can be improved in a display panel that can be used without damaging the texture of a space. When a display fault occurs in a display panel in which a thin layer, comprising a naturally-derived wood, a natural fiber, a natural leather, or a natural stone, or comprising a synthetic fiber, a synthetic leather, or a synthetic stone that is a raw material produced by imitating a natural appearance and feel, is provided on the peripheral surface of a housing so as to be in contact with the panel front surface, a two-dimensional code is corrected by being moved or rotated and is displayed.