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.

An entertainment system includes a user interactive device having an identification assembly configured to generate a pattern of light via reflective material, a camera configured to capture the pattern of light generated by the reflective material, and a controller having processing circuitry and a memory. The memory stores machine-readable instructions configured to cause the processing circuitry to receive an indication of the pattern of light and determine identification data associated with the user interactive device based on the pattern of light.

A color detection system, comprising: a card having printed thereon a color chart comprising multiple colored areas, and at least one grayscale area; a camera configured to acquire an image comprising a pixel representation a sample positioned adjacent to the card; a storage device configured to store reference data corresponding to the color chart and the at least one grayscale area; and a processor configured to: perform a grayscale correction to the pixel representation of the color chart and sample using a grayscale correction transformation between the pixel representation the grayscale area and the corresponding reference data, estimate colorimetric coordinates for the sample by applying to the respective grayscale corrected pixel representation, a transformation between the grayscale corrected pixel representation of the color chart and the corresponding colorimetric reference data, and convert the estimated colorimetric coordinates for the sample to RGB.

An optical code is readable by a generally used reading device, and optically readable as an information code that can appropriately prevent abuse due to duplication. In this optical code, data is recorded with a pattern of a plurality of light-color modules having high visible light reflectance and a plurality of dark-color modules having visible light reflectance lower than light-color modules. At least either the light-color modules or the dark-color modules are configured to include a first module and a second module having reflectances different from each other for invisible light of a predetermined wavelength. Thus, data is recorded as a readable pattern of modules, the pattern being differently observed between when irradiated with visible light and when irradiated with the invisible light of a predetermined length.

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 image processing apparatus includes an acquisition unit that acquires setting information acquired from a captured image, a setting unit that performs, based on the acquired setting information, setting regarding image analysis processing to be performed on a captured image obtained by capturing an image of a predetermined monitoring target range.

A graphic identification code generation method and apparatus are provided. The method includes receiving, from a terminal, target information and personalized effect information for a graphic identification code. The target information represents information displayed after the graphic identification code is scanned, and the personalized effect information is used to represent a display effect of the graphic identification code. Lattice data of the graphic identification code is generated according to the target information, and the graphic identification code is generated according to the lattice data and the personalized effect information.

According to various embodiments, an information encoding method may be provided. The information encoding method may include: receiving information to be encoded; splitting the information into a plurality of subsets; assigning each subset to a frame, so as to determine a plurality of frames; for each subset assigning the subset to be encoded set to a plurality of colors; and sequentially, for each frame of the plurality of frames, displaying the colors assigned for the respective frame and an indicator for the frame on an array of picture elements.

A simple color barcode reader for reading a target color includes a PCB and a means for determining the color of the target color. The PCB has at least one R/G/B LED and photosensor installed thereon for shining light on the target color in an environment to determine the color of the target color. The means for determining the color of the target color is based upon the output from the R/G/B LED and photosensor. The target color is one of 9 natural colors as defined on the hue scale.

When the intensity of visible light is properly modulated, the difference between the modulated visible light and the original visible light is not noticeable to human eyes but detectable to electronic devices. Thus, the modulated visible light may be utilized to form patterns that are only recognizable to electronic devices but not to human eyes.