Method for detecting rotation and magnification in images
    31.
    发明授权
    Method for detecting rotation and magnification in images 失效
    检测图像中旋转和放大的方法

    公开(公告)号:US5835639A

    公开(公告)日:1998-11-10

    申请号:US768679

    申请日:1996-12-18

    IPC分类号: G06K9/32 G06T7/00 G06K9/64

    CPC分类号: G06K9/3275 G06T7/0044

    摘要: A method for detecting an amount of rotation or magnification in a modified image, includes the steps of: embedding a marker image having a pair of identical features separated by a distance d and oriented at an angle .alpha. in an original image to produce a marked image, the marked image having been rotated and/or magnified to produce the modified image; performing an autocorrelation on the modified image to produce a pair of autocorrelation peaks corresponding to the location of the features of the marker image in the modified image; and comparing the separation d' and orientation .alpha.' of the autocorrelation peaks with the separation d and orientation .alpha. of the features in the marker image to determine the amount of rotation and magnification in the modified image.

    摘要翻译: 一种用于检测修改图像中的旋转或放大量的方法,包括以下步骤:将具有一对相同特征的标记图像嵌入距离d并以原始图像中的角度α定向以产生标记图像 标记图像已被旋转和/或放大以产生修改图像; 对所述修改图像执行自相关,以产生对应于所述修改图像中的所述标记图像的特征的位置的一对自相关峰; 并将自相关峰的分离d'和方向α'与标记图像中特征的分离d和方向α进行比较,以确定修改图像中的旋转和放大量。

    Method for image skew detection
    32.
    发明授权
    Method for image skew detection 有权
    图像偏斜检测方法

    公开(公告)号:US08160393B2

    公开(公告)日:2012-04-17

    申请号:US12559755

    申请日:2009-09-15

    IPC分类号: G06K9/36

    CPC分类号: G06K9/3275

    摘要: A method for calculating a skew angle of an original image, executed at least in part on a computer system stores image data for the original image in an electronic memory, then forms an energy-normalized image according to the relative contrast amplitude of image features over each of a plurality of local image regions within the stored image data. A partitioned image is formed by partitioning the energy-normalized image into a number of sub-regions. A summed region is formed as a combination of image pixel data from the sub-regions. A Fourier magnitude spectrum is obtained by performing a Fourier transform on the summed region. The skew angle is calculated according to the peak value of a radial line integration function that is formed by integrating the Fourier magnitude spectrum along each of a plurality of lines of constant radial angles. An output signal indicates the calculated skew angle.

    摘要翻译: 用于计算至少部分地在计算机系统上执行的原始图像的偏斜角的方法将原始图像的图像数据存储在电子存储器中,然后根据图像特征的相对对比度幅度形成能量标准化图像 所存储的图像数据内的多个局部图像区域中的每一个。 通过将能量标准化图像分割成多个子区域来形成分割图像。 求和区域形成为来自子区域的图像像素数据的组合。 通过在求和区域上执行傅里叶变换来获得傅里叶幅度谱。 根据通过沿着恒定径向角度的多条线中的每一条积分傅立叶幅度谱形成的径向线积分函数的峰值来计算偏斜角。 输出信号表示计算出的偏斜角。

    Method for image quality assessment using quality vectors
    33.
    发明授权
    Method for image quality assessment using quality vectors 有权
    使用质量矢量图像质量评估的方法

    公开(公告)号:US08126197B2

    公开(公告)日:2012-02-28

    申请号:US12274438

    申请日:2008-11-20

    IPC分类号: G06K9/00

    CPC分类号: G06K9/036

    摘要: A method for assessing the image quality of image data acquires image data, segments the image data into at least one spatial region, obtains a plurality of image quality measures for the at least one spatial region, and forms at least one quality vector that has two or more quality measures for the at least one spatial region. The at least one quality vector is classified into one of a plurality of predefined quality classes.

    摘要翻译: 用于评估图像数据的图像质量的方法获取图像数据,将图像数据分割成至少一个空间区域,获得用于至少一个空间区域的多个图像质量度量,并且形成至少一个具有两个 或至少一个空间区域的更多质量测量。 所述至少一个质量矢量被分类为多个预定质量等级之一。

    Method for Image Skew Detection
    34.
    发明申请
    Method for Image Skew Detection 有权
    图像歪斜检测方法

    公开(公告)号:US20100067826A1

    公开(公告)日:2010-03-18

    申请号:US12559755

    申请日:2009-09-15

    IPC分类号: G06K9/36

    CPC分类号: G06K9/3275

    摘要: A method for calculating a skew angle of an original image, executed at least in part on a computer system stores image data for the original image in an electronic memory, then forms an energy-normalized image according to the relative contrast amplitude of image features over each of a plurality of local image regions within the stored image data. A partitioned image is formed by partitioning the energy-normalized image into a number of sub-regions. A summed region is formed as a combination of image pixel data from the sub-regions. A Fourier magnitude spectrum is obtained by performing a Fourier transform on the summed region. The skew angle is calculated according to the peak value of a radial line integration function that is formed by integrating the Fourier magnitude spectrum along each of a plurality of lines of constant radial angles. An output signal indicates the calculated skew angle.

    摘要翻译: 用于计算至少部分地在计算机系统上执行的原始图像的偏斜角的方法将原始图像的图像数据存储在电子存储器中,然后根据图像特征的相对对比度幅度形成能量标准化图像 所存储的图像数据内的多个局部图像区域中的每一个。 通过将能量标准化图像分割成多个子区域来形成分割图像。 求和区域形成为来自子区域的图像像素数据的组合。 通过在求和区域上执行傅里叶变换来获得傅里叶幅度谱。 根据通过沿着恒定径向角度的多条线中的每一条积分傅立叶幅度谱形成的径向线积分函数的峰值来计算偏斜角。 输出信号表示计算出的偏斜角。

    VOICE COMMAND OF AUDIO EMITTING DEVICE
    35.
    发明申请
    VOICE COMMAND OF AUDIO EMITTING DEVICE 失效
    音频发射设备的声音命令

    公开(公告)号:US20080172221A1

    公开(公告)日:2008-07-17

    申请号:US11623107

    申请日:2007-01-15

    IPC分类号: G10L21/00 G10L21/02

    CPC分类号: G10L15/20 G10L2021/02082

    摘要: A method of extracting a voice command produced in an enclosed or partially enclosed environment, includes providing an impulse response signal of the enclosed or partially enclosed environment; recording the voice command and ambient sounds; and using the impulse response signal to extract the recorded voice command.

    摘要翻译: 提供在封闭或部分封闭的环境中产生的语音命令的方法包括提供封闭或部分封闭环境的脉冲响应信号; 录制语音命令和环境声音; 并使用脉冲响应信号提取录制的语音命令。

    Authentic document and method of making
    36.
    发明授权
    Authentic document and method of making 有权
    正品文件及制作方法

    公开(公告)号:US07333629B2

    公开(公告)日:2008-02-19

    申请号:US11227382

    申请日:2005-09-15

    IPC分类号: D21H27/02

    摘要: A method and system is disclosed for printing an authenticatable image having an embedded image into a receiver having a discernible physical characteristic, such that the printed image can be used to authenticate the receiver which includes scanning the receiver to produce information related to the discernible physical characteristic of the receiver, and providing a carrier which includes information related to the scanned receiver discernible physical characteristic. The method also includes combining the carrier with an input image to form the authenticatable image having the embedded image, and printing the authenticatable image having the embedded image onto the receiver.

    摘要翻译: 公开了一种用于将具有嵌入图像的可认证图像打印到具有可识别物理特性的接收机中的方法和系统,使得打印图像可以用于认证接收机,其包括扫描接收器以产生与可识别的物理特性相关的信息 并提供包括与扫描的接收器可辨别的物理特征相关的信息的载体。 该方法还包括将载体与输入图像组合以形成具有嵌入图像的可认证图像,以及将具有嵌入图像的可认证图像打印到接收器上。

    Method and computer program for detecting rotation and magnification of images
    37.
    发明授权
    Method and computer program for detecting rotation and magnification of images 失效
    用于检测图像的旋转和放大的方法和计算机程序

    公开(公告)号:US06711303B1

    公开(公告)日:2004-03-23

    申请号:US09452415

    申请日:1999-12-01

    IPC分类号: G06K936

    摘要: An improved method and computer program product for detecting an amount of rotation or magnification in a modified image, of the type including the steps of: a) embedding a marker image having a pair of identical features separated by a distance d and oriented at an angle &agr; in an original image to produce a marked image, the marked image having been rotated and/or magnified to produce the modified image; b) performing an autocorrelation on the modified image to produce a pair of autocorrelation peaks corresponding to the location of the features of the marker image in the modified image; and c) comparing the separation d and orientation &agr; of the autocorrelation peaks with the separation d and orientation &agr; of the features in the marker image to determine the amount of rotation and magnification in the modified image, wherein the improvement comprises the step of: d) preprocessing the modified image to have a constant standard deviation over all local regions in the image.

    摘要翻译: 一种改进的方法和计算机程序产品,用于检测修改图像中的旋转或放大量,其类型包括以下步骤:a)嵌入具有一对相同特征的标记图像,其间隔开距离d并以一定角度 alpha,以产生标记图像,标记图像已被旋转和/或放大以产生修改图像; b)对经修改的图像执行自相关以产生对应于修改图像中的标记图像的特征的位置的一对自相关峰值; 以及c)将自相关峰的分离d和取向α与标记图像中特征的分离d和方向α进行比较,以确定修改图像中的旋转和放大量,其中改进包括以下步骤:d )预处理修改后的图像以在图像中的所有局部区域具有恒定的标准偏差。

    Method and computer program for embedding and extracting an embedded message from a digital image
    38.
    发明授权
    Method and computer program for embedding and extracting an embedded message from a digital image 失效
    用于从数字图像嵌入和提取嵌入式消息的方法和计算机程序

    公开(公告)号:US06678390B1

    公开(公告)日:2004-01-13

    申请号:US09453160

    申请日:1999-12-02

    IPC分类号: G06K900

    摘要: A method and computer program for extracting an embedded message from a digital image, the embedded message being formed by convolution with a carrier, employs a message template indicating the relative locations of data in the embedded message, the relative locations of the data being such that the autocorrelation of the message template is strongly peaked. An arbitrary region of the digital image is correlated with the carrier to extract a cyclically shifted message from the digital image. The absolute value of the cyclically shifted message is taken to form a positive valued cyclically shifted message. The positive valued cyclically shifted message is correlated with the message template to form a shifted offset image having a peak amplitude representing the location of the message boundary. The location of the message boundary is employed to extract the hidden message.

    摘要翻译: 一种用于从数字图像提取嵌入消息的方法和计算机程序,所述嵌入式消息通过与载体卷积形成,采用指示嵌入消息中的数据的相对位置的消息模板,数据的相对位置使得 消息模板的自相关性很强。 数字图像的任意区域与载体相关联以从数字图像提取循环移位的消息。 循环消息的绝对值被采取为形成正值循环消息。 正值循环移位消息与消息模板相关联,以形成具有代表消息边界位置的峰值幅度的移位偏移图像。 采用消息边界的位置来提取隐藏的消息。

    Linear projective data embedding
    39.
    发明授权
    Linear projective data embedding 有权
    线性投影数据嵌入

    公开(公告)号:US06665418B1

    公开(公告)日:2003-12-16

    申请号:US09452823

    申请日:1999-12-01

    IPC分类号: G06K900

    摘要: In a method of embedding a hidden message in digital data, employing plurality of orthogonal random arrays of numbers as carriers for the bits of the hidden message, the random arrays are generated by applying a plurality of unique cyclical shifts to a single random array. In a preferred embodiment, the method is applied to digital image data and the cyclical shifts are defined as locations in a shift template, wherein the shift template has a highly peaked autocorrelation. The shift template is employed to recover the hidden message from the image without the need for calibration signals to indicate the boundaries of the hidden message.

    摘要翻译: 在将隐藏消息嵌入数字数据的方法中,采用多个数字的正交随机数组作为隐藏消息的比特的载波,通过将多个唯一的周期性移位应用于单个随机阵列来生成随机阵列。 在优选实施例中,将该方法应用于数字图像数据,并且循环移位被定义为移位模板中的位置,其中移位模板具有高峰值自相关。 采用移动模板从图像中恢复隐藏的消息,而不需要校准信号来指示隐藏消息的边界。