Image pattern detection method and apparatus
    1.
    发明授权
    Image pattern detection method and apparatus 有权
    图像图案检测方法和装置

    公开(公告)号:US06766056B1

    公开(公告)日:2004-07-20

    申请号:US09451441

    申请日:1999-11-30

    IPC分类号: G06K946

    CPC分类号: G06K9/4604

    摘要: Disclosed is method of detecting a predetermined mark (30) forming part of an image. A digitized form (48, 49) of the image (21) comprising a plurality of picture elements is provided and within a current region of the image a set of features is determined. The features typically comprise a dominant color feature (44) within the current region; and at least one moment feature (111) based on picture elements pertaining to the predetermined mark within the current region. Each determined feature is compared (113) with a corresponding predetermined feature (114) of the predetermined mark. Using the comparison, a confidence level for a detection of said predetermined mark within the current region calculated. Based on the confidence level, whether or not said predetermined mark is detected in the current region can then be determined. Adjunct to the above method, also disclosed are methods for providing multiple encoded representations (40) of the image, detecting a center location (108, 160) of a predetermined pattern in the image, and determining (170, 171) a moment feature of a portion of the image.

    摘要翻译: 公开了一种检测形成图像的一部分的预定标记(30)的方法。 提供了包括多个图像元素的图像(21)的数字化形式(48,49),并且在图像的当前区域内确定了一组特征。 特征通常包括当前区域内的主要颜色特征(44); 以及基于与当前区域内的预定标记相关的图像元素的至少一个矩形特征(111)。 将每个确定的特征与预定标记的相应预定特征(114)进行比较(113)。 使用比较,计算当前区域内的所述预定标记的检测的置信水平。 基于置信水平,可以确定当前区域中是否检测到所述预定标记。 还公开了上述方法的方法,还提供了用于提供图像的多个编码表示(40)的方法,检测图像中预定图案的中心位置(108,160),并且确定(170,171) 图像的一部分。

    Storing coding image data in storage of fixed memory size
    2.
    发明授权
    Storing coding image data in storage of fixed memory size 失效
    将编码图像数据存储在固定内存大小的存储中

    公开(公告)号:US06664902B2

    公开(公告)日:2003-12-16

    申请号:US10003101

    申请日:2001-12-06

    IPC分类号: H03M700

    摘要: An apparatus includes a DCT unit for transforming blocks of pixels into respective blocks of transform coefficients, entropy encoders for encoding respective partitions of the DCT blocks where at least one partition comprises bit-plane data from each block of transform coefficients, and a scan output manager for storing the entropy encoded partitions in a buffer of fixed memory size. The manager manages the storing of the coded partitions in the buffer whereby during the storing of the coded partitions if it is determined the buffer is full, a coded least perceptually significant partition currently stored in the buffer is overwritten by data from a coded more perceptually significant partition.

    摘要翻译: 一种装置包括用于将像素块变换成各个变换系数块的DCT单元,用于编码DCT块的各个分区的熵编码器,其中至少一个分区包括来自每个变换系数块的位平面数据,以及扫描输出管理器 用于将熵编码分区存储在固定存储器大小的缓冲器中。 管理器管理缓冲器中的编码分区的存储器,由此在编码分区的存储期间,如果确定缓冲器已满,当前存储在缓冲器中的编码最小感知有效分区被来自编码更感知重要性的数据所覆盖 划分。