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    • 3. 发明授权
    • Spectral visible edge marking for steganography or watermarking
    • 用于隐写或水印的光谱可见边缘标记
    • US08947744B2
    • 2015-02-03
    • US13526820
    • 2012-06-19
    • Andrew F. KurtzKurt M. SchroederMajid Rabbani
    • Andrew F. KurtzKurt M. SchroederMajid Rabbani
    • H04N1/40
    • G06K19/0614B42D25/333B42D25/382B42D25/387G06K1/121G06K19/06103H04N1/32133H04N2201/327H04N2201/3271
    • A print media (200) comprises paper or other substrate, on which image content, whether text or images are printed with accompanying hidden data (220). The image content is printed with one or more normal printing process visible colorants (340), while the hidden data (220) is printed with spectral edge markers (320). The spectral edge marker materials (320) have a substantial spectral absorption just outside the human visible spectrum, and only slight visible absorption, which is masked by the visible colorants (340). Although the hidden data is nominally visually imperceptible, an image capture device (250) having a visible spectral response that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, can then detect the hidden data.
    • 打印介质(200)包括纸或其他基板,图像内容,文本或图像是否随着隐藏数据被打印(220)。 图像内容用一个或多个正常打印过程可见的着色剂(340)打印,而隐藏数据(220)用光谱边缘标记(320)打印。 光谱边缘标记材料(320)在人类可见光谱外部具有实质的光谱吸收,并且只有轻微的可见光吸收,其被可见的着色剂(340)掩蔽。 虽然隐藏的数据在名义上视觉上是不可察觉的,但是具有可见光谱响应的图像捕获装置(250)可以检测隐藏的数据,该可见光谱响应延伸到光谱边缘标记物吸收发生的可见光谱之外的光谱区域。
    • 4. 发明授权
    • Spectral edge marking for steganography or watermarking
    • 用于隐写或水印的光谱边缘标记
    • US08941886B2
    • 2015-01-27
    • US13526837
    • 2012-06-19
    • Andrew F. KurtzKurt M. SchroederMajid Rabbani
    • Andrew F. KurtzKurt M. SchroederMajid Rabbani
    • H04N1/40
    • C09D11/037B42D25/382B42D25/387C09D11/32G06K1/121G06K19/06103G06K19/0614H04N1/3224H04N1/32309H04N1/32331
    • A method for providing digital watermarking for text or images that uses spectral edge marking materials (320) printed on a print media (200) to embed hidden data (220). The spectral edge markers (320) have an absorption spectrum at the edge of the human visible spectrum, either at the UV edge or IR edge, which provides an optical density that is generally imperceptible to humans, but which can be detected by an image capture device (250). The crosstalk of visible optical absorption provided by these materials is largely masked by the presence of visible colorant(s) (340), with only small color differences between areas with and without the spectral edge markers (320). The image capture device (250) has a visible spectral response that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, and can be operated to detect the hidden data.
    • 一种用于为文本或图像提供数字水印的方法,该方法使用打印在打印介质(200)上的光谱边缘标记材料(320)来嵌入隐藏数据(220)。 光谱边缘标记(320)在人类可见光谱的边缘处具有在UV边缘或IR边缘处的吸收光谱,其提供通常对人类不可察觉的光密度,但是可以通过图像捕获来检测 设备(250)。 由这些材料提供的可见光吸收的串扰在很大程度上被可见色素(340)的存在所遮蔽,在具有和不具有光谱边缘标记(320)的区域之间仅具有小的色差。 图像捕获装置(250)具有可见的光谱响应,其延伸到刚好在发生光谱边缘标记吸收的可见光谱外部的光谱区域中,并且可以操作以检测隐藏的数据。
    • 8. 发明授权
    • Method for compressing and decompressing digital having text
    • 用于压缩和解压缩具有文本的数字图像的方法
    • US06625323B2
    • 2003-09-23
    • US09161032
    • 1998-09-25
    • Thomas A. HendersonMajid Rabbani
    • Thomas A. HendersonMajid Rabbani
    • G06K934
    • G06T9/007
    • A method for compressing a digital image having both saturated text and/or line art and pictorial imagery, the method comprises the steps of: receiving the digital image as blocks of pixels; analyzing the block content to determine if all or any combination of the saturated text and/or line art, pictorial imagery or other types of image data are present; assigning the saturated text and/or line art, the pictorial imagery, the other types of image data to one of a plurality of categories; compressing the block of saturated text and/or line art, if any, according to a first predetermined compression method; compressing the pictorial imagery, if any, according to a second predetermined compression method; compressing the other types of imagery, if any, according to other predetermined compression methods; and providing means of conveying the image categories to a decoder.
    • 一种用于压缩具有饱和文本和/或线条艺术和图像图像的数字图像的方法,所述方法包括以下步骤:接收数字图像作为像素块; 分析块内容以确定饱和文本和/或线条艺术,图像图像或其他类型的图像数据的全部或任何组合是否存在; 将饱和文本和/或线条艺术,图形图像,其他类型的图像数据分配给多个类别中的一个; 根据第一预定压缩方法压缩饱和文本和/或行艺术块(如果有的话); 根据第二预定压缩方法压缩图形图像(如果有的话); 根据其他预定的压缩方法压缩其他类型的图像(如果有的话); 以及提供将图像类别传送到解码器的装置。
    • 9. 发明授权
    • Method and apparatus for visually optimized rate control
    • 用于视觉优化速率控制的方法和装置
    • US06212302B1
    • 2001-04-03
    • US09222190
    • 1998-12-29
    • Chris W. HonsingerMajid RabbaniPaul W. Jones
    • Chris W. HonsingerMajid RabbaniPaul W. Jones
    • G06K936
    • G06T9/00
    • A method selecting a quality parameter for use in compressing a digital image, the method comprises the steps of creating a plurality of quantizer parameter sets, each having a corresponding quality parameter; compressing the digital image with the plurality of quantizer parameter sets for providing a corresponding plurality of compressed file sizes; creating a rate-distortion curve from the plurality of quantizer parameter sets and the corresponding compressed file sizes; providing a maximum and minimum quality parameters; providing a target compressed file size; and selecting a quality parameter based on the rate distortion curve, the maximum and minimum quality parameters and the target compressed file size.
    • 一种选择用于压缩数字图像的质量参数的方法,所述方法包括以下步骤:创建多个具有相应质量参数的量化器参数集; 使用所述多个量化器参数集来压缩所述数字图像,以提供对应的多个压缩文件大小; 从多个量化器参数集和对应的压缩文件大小创建速率 - 失真曲线; 提供最大和最小的质量参数; 提供目标压缩文件大小; 并根据速率失真曲线,最大和最小质量参数以及目标压缩文件大小选择质量参数。