An anti-copy optical material and methods of using the material to passively frustrate scanner-based reproduction processes are disclosed. More particularly, embodiments of the anti-copy optical material include a fluorescent material to absorb visible incident light from a scan lamp and to emit a visible fluorescence. The anti-copy optical material may also include one or more optical absorbers to absorb one or more peak wavelengths of the visible incident light from the scan lamp.

A symbol detector includes a binarization processor configured to read a symbol image in a uniaxial direction and output a first pixel value or a second pixel value obtained by binarization of a pixel value of each pixel of the symbol image, a calculator configured to calculate a second ratio of a first consecutive value and a second consecutive value obtained before and after the first consecutive value in a case where the first consecutive value and the second consecutive value are switched alternately, and a transmitter configured to output the symbol image in a case where a difference between the calculated second ratio and the first ratio is equal to or lower than a predetermined value, and stop outputting the symbol image in a case where the difference is higher than the predetermined value.

An article identifier or code including at least one photo-responsive dye and a method of encoding or embedding information in same. A reader device for decoding or extracting information in an article identifier or code and verifying or authenticating that information and the associated extraction and authentication methods.

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.

Techniques to improve detection and security of images, including formation and detection of matrix-based images. A histogram may be used to determine a most prevalent color of a plurality of prevalent colors associated with an environment. A related plurality of colors may be determined based on the most prevalent plurality of colors and a colorspace conversion. A matrix barcode may be generated based on the related plurality of colors and an ultraviolet layer.

A computer-implemented method includes determining, by a processor based on a histogram of an environment, a most prevalent color of a plurality of prevalent colors associated with the environment by mapping the most prevalent color and the plurality of prevalent colors according to a red-green-blue (RGB) colorspace. The processor determines a related plurality of colors by determining at least one set of color coordinates for each one of the most prevalent color and the plurality of prevalent colors according to the another colorspace and determines at least one set of color coordinates for the related plurality of colors according to the another colorspace. A matrix barcode is generated using the related plurality of colors.

A composite two-dimensional code according to an embodiment of the present invention is a combination of a first two-dimensional code and a second two-dimensional code. The composite two-dimensional code includes a first cell having a first color, a second cell having a second color, and a third cell having a third color. The first color, the second color, and the third color are different from each other. The first two-dimensional code is acquired by a first filtering processing. The second two-dimensional code is acquired by a second filtering processing.

The disclosure comprises systems and methods for identifying color-coded tags on tools in a storage container where the identification sensor can be calibrated and adjusted. The method can include capturing image data comprising a plurality of pixels of an identification tag associated with a tool in a storage container. The method can include correlating a plurality of pixels to a numeric hue value. The method can include identifying a pattern of pixels from the plurality of pixels, wherein the pattern of pixels is correlated to a known pattern of color parameters consistent with the identification tag associated with the tool in the storage container. Further in response to identifying the pattern of pixels is consistent with the identification tag, determining the presence or absence of the tool in the storage container. The method can further include implementing a color gain to adjust a boundary range for a color.

A consumer product includes outer packaging, the packaging having a visible code and having a first colour, a second colour and a third colour, wherein the visible code includes a matrix of square cells having cells of the first colour, cells of the second colour, and cells or a frame surrounding the first group and the second group of cells of the third colour, wherein the first colour is brighter than the second colour. A system including the product is also related.

An image of an optical tag may be acquired by a camera to extract tag data and determine a pose of the camera relative to the optical tag. The optical tag includes gradient features at the corners. These gradient features transition from one color near the corner of the optical tag to a second color distal to the corner of the optical tag. The image, once acquired, is analyzed to determine gradient values, identify the corners of the optical tag, and determine the boundaries of the optical tag. The contents of the optical tag may then be decoded to extract tag data. In addition, pose data may be determined to indicate a distance and an angle of the camera relative to the optical tag.