Neutral pixel detection using color space feature vectors wherein one color space coordinate represents lightness

    公开(公告)号:US07116443B2

    公开(公告)日:2006-10-03

    申请号:US10137677

    申请日:2002-05-02

    CPC classification number: H04N1/56 G01J3/462

    Abstract: A method for neutral pixel detection using color space feature vectors wherein one color space coordinate represents lightness is provided. The method includes the following steps: a) receiving an input image represented in a first color space; b) converting the input image to a second color space wherein one coordinate represents lightness; c) selecting a pixel in the second color space representation to be classified; d) computing second color space feature vectors associated with the selected pixel; and e) classifying the selected pixel between neutral and color classes based on the values computed for the second color space feature vectors. Typically, the input image is processed using a smoothing filter to create a smoothed input image prior to the conversion to the second color space. The method can be adapted to page processing or strip processing schemes with respect to the input image.

    Method for matching printing ink colors

    公开(公告)号:US07046396B2

    公开(公告)日:2006-05-16

    申请号:US10110426

    申请日:2000-10-09

    Applicant: Domingo Q Chan

    Inventor: Domingo Q Chan

    Abstract: A system is provided that includes a first computer that can communicate with a second computer. The second computer sends information to the first computer that includes a desired ink color and optionally includes information of other desired ink properties. The first computer includes a database of data for predicting color data of ink formulations using a selected ink base color set, a software program for selecting an ink formulation based on data for a desired ink, and a software program for sending information to the second computer to display the color of the selected ink formulation on a color monitor connected to the second computer. The ink base color set can be selected to provide other desired properties for the ink, such as low cost, light fastness, or chemical resistance.

    Color naming, color categorization and describing color composition of images

    公开(公告)号:US20060087517A1

    公开(公告)日:2006-04-27

    申请号:US10530138

    申请日:2002-09-20

    CPC classification number: H04N1/644 G01J3/462 G01J3/463 G01J3/465 G06T7/90

    Abstract: The invention provides methods, systems and apparatus for assigning color names to individual image pixels, and generating verbal description of color composition in images, suitable for a wide variety of information processing applications. For an isolated image pixel (individual color sample or color value) an illustrative embodiment of this invention uses a predetermined vocabulary of color names, and then generates a distance measure describing the best color match and corresponding color name for the given pixel. For the input image, an illustrative embodiment of this invention computes the simplified representation of the scene, consistent with human perception, and uses the predetermined vocabulary, syntax rules and metric to assign color names to all perceptually significant objects and regions and obtain the verbal description of the overall color composition. The invention is also applicable to other types of information signals, such as sequences of video frames, web pages, etc.

    SYSTEM AND METHOD FOR CONTROLLING METAMERISM
    117.
    发明申请
    SYSTEM AND METHOD FOR CONTROLLING METAMERISM 有权
    用于控制元素的系统和方法

    公开(公告)号:US20060012810A1

    公开(公告)日:2006-01-19

    申请号:US10709827

    申请日:2004-06-01

    CPC classification number: G01J3/46 G01J3/462 G01J3/463 G01J3/465

    Abstract: The present invention provides a plurality of representations of color that are stored in an electronic color library and that can be selected by a user. After a color selection is made, a plurality of color ink formulas and/or colorant formulas capable of producing the selected color are provided. Further, other selections can be made to define a substrate or other criteria that can impact the color ink formulas. A plurality of color ink and/or colorant formulas are provided and optimized in order to reduce or eliminate undesired effects caused by metamerism. The formulas can be transmitted over a communication network, such as the Internet or a local Intranet to another party, such as color products manufacturers.

    Abstract translation: 本发明提供存储在电子色谱库中并可由用户选择的多种颜色表示。 在进行颜色选择之后,提供能够产生所选颜色的多种彩色墨水配方和/或着色剂配方。 此外,可以进行其他选择以限定可影响彩色墨水配方的基底或其它标准。 提供并优化多种彩色油墨和/或着色剂配方以减少或消除由同色异构体引起的不期望的影响。 公式可以通过通信网络(例如因特网或本地内联网)传输到另一方,如彩色产品制造商。

    Paint color matching and coordinating system

    公开(公告)号:US06924817B2

    公开(公告)日:2005-08-02

    申请号:US10383297

    申请日:2003-03-06

    Abstract: A paint color matching and coordinating system comprises an interface for receiving an input reference color, a processor capable of reading a memory, a memory including (1) instructions readable by the processor and (2) a database of architectural paint colors spanning all or most of the known color space, and a display generator. In use, the interface of the system receives an input reference color from a user. The processor selects a “reference paint color” from the database, the reference paint color being visually closer, with respect to color space, to the input reference color than any other paint color in the database. According to the invention, color space is divided into a plurality of fixed, generally equally sized, non-overlapping, contiguous portions, each color space portion being defined as the space of all colors within a band of hues within color space. The processor selects five sets of paint colors—one set from each of the color space portions that include the five hues that comprise the “five-way harmony” of the reference paint color. The processor may also select a sixth set of paint colors from the color space portion that includes the hue of the reference paint color. Finally, the processor directs the display generator to create a display of color samples of the reference paint color and of the first through sixth sets of paint colors.

    Reference database and method for determining spectra using measurements from an LED color sensor, and method of generating a reference database
    120.
    发明申请
    Reference database and method for determining spectra using measurements from an LED color sensor, and method of generating a reference database 有权
    用于使用来自LED颜色传感器的测量来确定光谱的参考数据库和方法,以及生成参考数据库的方法

    公开(公告)号:US20050160092A1

    公开(公告)日:2005-07-21

    申请号:US10758096

    申请日:2004-01-16

    Abstract: To determine spectra, integrated multiple illuminant measurements from a non-fully illuminant populated color sensor may be converted into a fully populated spectral curve using a reference database. The reference database is partitioned into a plurality of clusters, and an appropriate centroid is determined for each cluster by, for example, vector quantization. Training samples that form the reference database may be assigned to the clusters by comparing the Euclidean distance between the centroids and the sample under consideration, and assigning each sample to the cluster having the centroid with the shortest Euclidean distance. When all training samples have been assigned, the resulting structure is stored as the reference database. When reconstructing the spectra for new measurements from the sensor, the Euclidean distances between actual color samples under measurement and each cluster centroid are measured. The spectra are then reconstructed using only the training samples from the cluster corresponding to the shortest Euclidean distance, resulting in improved speed and accuracy.

    Abstract translation: 为了确定光谱,可以使用参考数据库将来自非完全光源的填充颜色传感器的集成多个光源测量值转换为完全填充的光谱曲线。 参考数据库被划分成多个簇,并且通过例如向量量化为每个簇确定适当的质心。 形成参考数据库的训练样本可以通过比较质心和所考虑的样本之间的欧氏距离,并将每个样本分配给具有最短欧几里德距离的质心的群集来分配给群集。 当所有训练样本都被分配后,结果存储为参考数据库。 当从传感器重建新测量的光谱时,测量测量下的实际颜色样本与每个聚类质心之间的欧氏距离。 然后使用仅对应于最短欧几里得距离的簇的训练样本重建光谱,从而提高速度和精度。

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