An article of manufacture may include a matrix barcode on a physical medium and associated with an environment. The matrix barcode may include a plurality of colors, where at least one of the plurality of colors is a least prevalent color, of a plurality of prevalent colors in the environment.

Techniques to improve operation of a processor or device utilizing colorspace conversions and operations are provided. A system includes a programmable logic array that can perform, a colorspace conversion, which can in turn be by a distinct processor device. The colorspace conversion can be performed by the programmable logic in response to the change of a colorspace associated with a target, e.g. a real or virtual environment, and the colorspace conversion is intended to optimize the colorspace of an object, entity, or other environment in the changed real or virtual environment, and where the optimized object, entity or other environment can be used by the processor device as part of a computing application as suitable for that colorspace conversion, which can include but is not limited to augmented reality, printing of images, detection of images, global positioning, and detection of real and virtual objects in real or virtual environments.

The information code has an information code area constituted of colored information cells with two or more colors, the information code area having the specific information recorded using the information cells as information units, and a teacher code area having teacher cells with the same colors and the same number of colors as the information cells so as to identify the colors of the information cells. In the information code, the teacher code area is placed away from the information code area or inside the information code area.

A method for securely marking an object, comprising: a step of determining a maximum cell size (302) of a two-dimensional barcode (301), the cell size being defined by an area containing a number of dots (304, 305), a step of estimating a minimum number of dots of a predetermined colour referred to as the “main colour” in a cell such that the cell is detected as being said colour by a predetermined reader, a step of encoding a message in cells of a two-dimensional barcode by defining the main colour of each cell, said message representing at least one instance of access to a remote resource, for at least one cell, a step of defining an image (306) to be represented in the cell, the number of dots in the colour image defining the cell being greater than the estimated minimum number and a step of marking the object with the secure two-dimensional barcode.

An animal individual identification member includes a first base brought into contact with a body of an animal, a second base including an identification portion indicating identification information of the animal by a sequence of mutually different adjacent colors, and an adhesive layer which is located between the first base and the second base and bonds the first base and the second base. The first base, the second base, and the adhesive layer have identical resin skeletons.

Provided is an optical code that retains compatibility with existing optical codes and is used for recording information different from the information recorded under prescribed conditions. Also provided are a method and a device for reading the optical code. The optical code includes a plurality of light color modules of a light color and a plurality of dark color modules of a dark color to record first data. At least the light color modules or the dark color modules are made up of a first module and a second module having different reflectance for light of a predetermined wavelength. Second data is recorded in a pattern of the first and second modules.

A matrix bar code on a surface may comprise a plurality of colors and an ultraviolet layer. The matrix barcode may be a fiducial marker for conveying spatial information. The The conveyed spatial information may stem at least in part from the ultraviolet layer.

A matrix barcode on a surface may comprise a plurality of colors and an infrared layer. The matrix barcode may be a fiducial marker for conveying spatial information. The conveyed spatial information may stem at least in part from the infrared layer.

Techniques to improve detection and security of images, including formation and detection of matrix-based images. Some techniques include logic to process image data, generate one or more colorspaces associated with that data, and perform colorspace conversions based on the generated colorspace. The logic may be further configured to generate an image based on the colorspace conversions, including but not limited to a matrix bar code. The logic may be further configured to apply one or both of an ultraviolet layer and an infrared layer to the image, e.g. matrix barcode, generated from the colorspace conversion(s). Other embodiments are described and claimed.

Disclosed is a Data Matrix (DM) code. An image of the DM code consists of several color blocks arranged in a rectangular array, a circle of color blocks on the edge of the image constitutes a positioning region, and the color blocks inside the image constitute a coding region; the positioning region includes an “L”-shaped edge and a positioning edge opposite to the “L”-shaped edge, wherein the colors of the color blocks include at least three of eight colors, the eight colors being three standard RGB colors, four standard CMYK colors, and white. The positioning edge is formed by alternately arranging color blocks of two colors that are black after filtering by a channel in any color of RGB and white after filtering by a channel in the same color.