| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 235462040 | Bar code with bars of more than two colors (e.g., multicolored bar code, multilevel gray) | 13 |
| 20090194592 | Color Barcode Producing Method and Apparatus, Color Barcode Reading Method and Apparatus and Color Barcode Reproducing Method and Apparatus - A color barcode can record much more amount of information than black white barcode. However, the problem of the color barcode is that it is easy to lose integrity or authenticity in printing and copy generation. This invention provides an apparatus and a method to keep the integrity or authenticity of the color barcode. Such is accomplished by the color reference portion of the color barcode including reference color tiles filled with colors which are used in a data portion of the color barcode and an apparatus and a method for producing, reproducing and reading such color barcode. | 08-06-2009 |
| 20090078772 | Techniques for decoding images of barcodes - Techniques for enhancing the reliable and efficient decoding of images of computer-readable symbols, which represent information encoded using a one- or two-dimensional visual symbology, are discussed. In accordance with one technique, prior to attempting to decode a particular image, a likelihood of successfully decoding the visual symbology from the image is determined based on a success metric. The success metric is calculated based on the blurriness of the image, or the tilt of the camera that captured the image, or both. Levels of blurriness or tilt, and the likelihood of decoding success, are ascertained with respect to predetermined reference values associated with generally decodable images. In accordance with another technique, image-sharpening algorithms are applied at select locations within the image. Such locations generally correspond to centers of modules within the visual symbology of the computer-readable symbol, which are assigned values based on grayscale values of proximate pixels in the image. | 03-26-2009 |
| 20110089241 | Orthogonal Charge-Based Spectral Coding with Quantum Dot Conjugates - Populations of quantum dots are combined with quantities of a modulator of photoluminescence to produce a plurality of optical barcodes having at least two distinguishable colors arising from varying quantities of a modulator of photoluminescence bound to the populations of quantum dots. | 04-21-2011 |
| 20100025472 | COLORED BARCODE DECODING - In an exemplary embodiment, a method is employed to read an overprinted barcode. An RGB pixel map is obtained from an overprinted color barcode that contains a plurality of disparate colors. A pixel map is allocated for each of the colors detected and each pixel is classified in the one or more pixel maps according to color. One or more barcodes are extracted from the overprinted barcode that correlates to each color detected. Each of the extracted barcodes are then filtered, decoded and read. | 02-04-2010 |
| 20120043384 | Multi-Modal One-Dimensional Barcodes - Techniques for decoding a multi-modal barcode are provided. The techniques include scanning a multi-modal barcode into a grayscale image, applying a threshold to quantize the grayscale image into a monochrome image, passing the monochrome image to 1D barcode recovery to reconstruct a primary barcode, applying a horizontally-oriented edge detector to the grayscale image to quantize grayscale into monochrome, passing the monochrome image to a 1D barcode recovery process to reconstruct a secondary barcode to decode the multi-modal barcode. | 02-23-2012 |
| 20120000983 | NOISE REMOVAL FROM COLOR BARCODE IMAGES - A method for noise removal from color barcode images includes acquiring a barcode image using a color imaging array and separating the barcode image into color channels. Weighting factors are associated with the color channels and at least one weighting factor is reduced. The weighting factors are applied to the color channels to produce a first transformed image. A portion of the first transformed image is analyzed to produce a first set of decoded data from the barcode. | 01-05-2012 |
| 20120118969 | SYSTEM AND METHOD FOR BARCODE SCANNING USING IMAGE CALIBRATION - A method and system is provided barcode scanning using image calibration for a captured image of a target barcode. The method comprises: receiving color image values for the captured image from a color image sensor; determining a set of coefficients for calibrating the captured image in dependence upon predefined sensor sensitivity profiles, the predefined sensor sensitivity profiles for defining spectral sensitivity values for the color image sensor for a range of predetermined wavelengths. Once the set of coefficients are obtained, they are applied to the color image values to obtain calibrated image values such as to provide color balancing of the captured image. | 05-17-2012 |
| 20120118970 | SYSTEM AND METHOD FOR BARCODE SCANNING WITH COLOR IMAGE SENSORS - A system and method are provided for barcode scanning for a target barcode comprising: receiving color image values for a captured image of the target barcode from at least one color image sensor; and extracting luminosity values for each pixel of the captured image from the color image values to define greyscale image values corresponding to the color image values. Once the luminosity values are defined, they are provided as greyscale image values to a greyscale barcode decoder for subsequent processing thereof. | 05-17-2012 |
| 20120153023 | Colored barcode decoding - In an exemplary embodiment, a method is employed to read an overprinted barcode. An RGB pixel map is obtained from an overprinted color barcode that contains a plurality of disparate colors. A pixel map is allocated for each of the colors detected and each pixel is classified in the one or more pixel maps according to color. One or more barcodes are extracted from the overprinted barcode that correlates to each color detected. Each of the extracted barcodes are then filtered, decoded and read. | 06-21-2012 |
| 20120018518 | BARCODE PROCESSING - A blurred barcode image is processed by providing an image representation thereof comprising grayscale values. The image representation is deconvoluted using a candidate motion kernel to get a deconvoluted representation. A barcode similarity measure is calculated for the deconvoluted representation to indicate how close the distribution of the grayscale values of the deconvoluted representation is to an optimal distribution for a barcode image. The kernel provision, deconvolution and measure calculation are repeated for different candidate | 01-26-2012 |
| 20120312877 | SYSTEM AND METHOD FOR PROVIDING SUFFICIENT ILLUMINATION QUALITY FOR BARCODES CAPTURED WITH A COLOR IMAGE SENSOR - A barcode scanner device for reading a target barcode having a plurality of feature sections in a first color and a plurality of background sections in a second color. The device comprises: a light source for providing incident illumination onto the target barcode during reading of the target barcode, the light source having a plurality of independently selectable color wavelengths; a photodetector for receiving at least a portion of the incident illumination when reflected off the target barcode as reflected illumination, the reflected illumination used by the photodetector to capture a first color image of the target barcode when a first color wavelength is selected as the incident illumination and to capture a second color image of the target barcode when a second color wavelength is selected as the incident illumination. | 12-13-2012 |
| 20120298753 | System and Method for Decoding Barcodes Not Easily Perceptible by Human Vision - A computing device and method for reading a barcode captured with a color image sensor is disclosed. The barcode can have features and background that have equal brightness and a substantially low chromacity deviation such that the barcode could not be easily perceptible and decoded with known greyscale decoding techniques. The method for reading the barcode includes receiving color image values for each pixel of a captured image of a target barcode from a color image sensor, determining chrominance values for each pixel from the color image values, detecting edges based on the chrominance values to generate an edge-detected image that is provided to a greyscale barcode decoder to decode the information in the target barcode. The chrominance values can be based on the blue and red difference components from the YUV image format, and the U and V values can be combined using color temperature information. | 11-29-2012 |
| 20120080525 | Document Security Utilizing Color Gradients - The present invention includes apparatus and methods for printing and verifying postage stamps on demand via a personal postage stamp printer. The indicium by which the stamp is printed includes a color stripe and a data field including authentication data that corresponds to the color stripe. To authenticate the stamp, the authentication data in the data field is read and compared with authentication data extracted from the color stripe. | 04-05-2012 |
