Methods and systems for designing large sets of barcodes that ensure robust and efficient error correction capabilities are described. Also described are methods for assigning barcodes to target analytes that minimize optical crowding in in situ detection applications. Furthermore, methods for performing barcode error correction and for performing barcode-assisted image registration and alignment are also described.

Methods and systems for designing large sets of barcodes that ensure robust and efficient error correction capabilities are described. Also described are methods for assigning barcodes to target analytes that minimize optical crowding in in situ detection applications. Furthermore, methods for performing barcode error correction and for performing barcode-assisted image registration and alignment are also described.

Methods and systems for designing large sets of barcodes that ensure robust and efficient error correction capabilities are described. Also described are methods for assigning barcodes to target analytes that minimize optical crowding in in situ detection applications. Furthermore, methods for performing barcode error correction and for performing barcode-assisted image registration and alignment are also described.

A secure indicator includes a substrate, a barcode symbol that has a plurality of barcode modules provided on the substrate, and a security material positioned proximate the barcode symbol on the substrate. The security material is configured to be activated by irradiation at one or more predetermined activation wavelengths. Additionally, the barcode symbol is configured to be read (i) before the security material is activated and (ii) while the security material is activated.

In a system and method of recognizing a barcode from a stream of video frames, a processor-implemented camera module receives a stream of video frames, with at least one video frame including a barcode. A processor-implemented barcode blur estimate module estimates an amount of defocus blur in a video frame. The processor-implemented barcode blur estimate module further estimates an identity of the barcode. A processor-implemented barcode localization module identifies a region of the video frame containing the barcode. A processor-implemented barcode geometric modeler module generates a geometric model of the barcode that includes an identified barcode deformity. A processor-implemented barcode decoder module decodes the barcode from the video frame using the estimated amount of defocus blur, the estimated identity of the barcode, and the geometric model of the barcode.

A two-dimensional code error correction decoding method is provided. In an embodiment, a two-dimensional code image is preprocessed to obtain a data codeword for decoding; optimal parameter matching is performed based on the data codeword to obtain a corresponding interpolation severity, and interpolation is performed based on the interpolation severity to construct a binary polynomial; an optimal information polynomial is obtained based on the binary polynomial, and the optimal information polynomial is used as an information codeword; and data decoding is performed based on the information codeword to obtain original information corresponding to the two-dimensional code image.

Disclosed in embodiments of the present application are a QR code generation method and apparatus for a terminal device. The terminal device comprises a camera. A specific implementation mode of the method comprises: receiving a QR code generation instruction input by a user, wherein the QR code generation instruction comprises a QR code information; starting a camera, and generating a camera real-time photographing picture; and generating a real-time picture displaying the QR code based on the QR code information and the generated camera real-time photographing picture. The implementation mode enables the user to clearly distinguish whether the QR code is an originally generated QR code, thereby improving the security of the QR code.

The optical information reader includes an imaging part configured to capture a plurality of images at predetermined timing until code reading results in success or a reading process times out, and an output part configured to output information on timing at which the optical information reader receives the trigger signal, success or failure information on code reading, and the plurality of images captured by the imaging part, and success or failure information representing whether the reading process performed by a decoder results in success or failure and the plurality of images captured in response to the trigger signal are associated with the trigger signal, and, with a list of reading results corresponding to a plurality of the trigger signals displayed on a display part.

Proposed are an image reading device and method of a simple configuration which can be easily operated intuitively by the operator, and which enables the accurate reading of a 2D code. With the image reading device which optically reads an image and the image reading method to be executed by the image reading device of the present invention, a first aerial image, which indicates a position over which the image is to be placed, is aerially formed at a focal position of the camera, the image placed in conformity with the first aerial image is read with a camera, and the first aerial image is aerially formed at a focal position of the camera.

A sensor-augmented two-dimensional barcode includes a layer provided on a substrate comprising a two-dimensional error-correcting barcode symbol. The bar code symbol further includes a barcode region, an empty region, and a dynamic region. The barcode region includes a plurality of modules in a static color state and the empty region has an area. Additionally, the dynamic region is provided on the substrate and positioned within the area of the empty region. The dynamic region includes a dynamic indicator having a chemistry that is configured, responsive to the occurrence of an environmental condition, to undergo a chemical or physical state change between an initial state and an end state, causing a change in the color state of the dynamic indicator. Additionally, the color state indicates exposure to the environmental condition.