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    • 5. 发明申请
    • Light-Emitting Device Substrate
    • 发光器件基板
    • US20110272734A1
    • 2011-11-10
    • US13144696
    • 2009-11-11
    • Akihiro HachigoTakao NakamuraMasashi Yoshimura
    • Akihiro HachigoTakao NakamuraMasashi Yoshimura
    • H01L33/30
    • C30B25/18C30B29/403H01L33/007
    • The present invention is a minimal-defect light-emitting device substrate that enables emitted light to issue from a device's substrate side, and is a light-emitting device 100 substrate furnished with a transparent substrate 10 that is transparent to light of wavelengths between 400 nm and 600 nm, inclusive, and a nitride-based compound semiconductor thin film 1c formed onto one of the major surfaces of the transparent substrate 10 by a join. Letting the thermal expansion coefficient of the transparent substrate along a direction perpendicular to the major surface of the transparent substrate be α1, and the thermal expansion coefficient of the nitride-based compound semiconductor thin film be α2, then (α1−α2)/α2 is between −0.5 and 1.0, inclusive, and at up to 1200° C. the transparent substrate does not react with the nitride-based compound semiconductor thin film 1c. The absolute index of refraction of the transparent substrate 10 preferably is between 60% and 140%, inclusive, of the absolute index of refraction of the nitride-based compound semiconductor thin film.
    • 本发明是一种使发射光能够从器件的衬底侧发出的最小缺陷发光器件衬底,并且是配备透明衬底10的发光器件100衬底,透明衬底10对波长在400nm之间的光是透明的 和600nm,以及通过接合形成在透明基板10的一个主表面上的氮化物系化合物半导体薄膜1c。 使透明基板沿着与透明基板的主面垂直的方向的热膨胀系数为α1,氮化物系化合物半导体薄膜的热膨胀系数为α2,则α1-α2/α2为 在-0.5和1.0之间,并且在高达1200℃下,透明衬底不与氮化物基化合物半导体薄膜1c反应。 透明基板10的绝对折射率优选在氮化物系化合物半导体薄膜的绝对折射率的60%〜140%的范围内。
    • 7. 发明授权
    • Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program
    • 数字水印嵌入方法,数字水印嵌入装置和存储数字水印嵌入程序的存储介质
    • US07817818B2
    • 2010-10-19
    • US11412210
    • 2006-04-25
    • Takao NakamuraHiroshi OgawaAtsuki TomiokaYouichi Takashima
    • Takao NakamuraHiroshi OgawaAtsuki TomiokaYouichi Takashima
    • G06K9/00
    • G06T1/0028G06T2201/0051G06T2201/0052G06T2201/0061G06T2201/0083G06T2201/0202H04N1/32203H04N1/32208H04N1/32293H04N2201/3233H04N2201/327
    • A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.
    • 一种将水印嵌入数字数据的方法,当将水印嵌入到数字图像中时,使用密钥从水印中独立地改变复数水印系数矩阵的每个系数值的实数分量和虚数分量, 嵌入在数字图像中的步骤,用于对改变的水印的序列矩阵执行离散傅立叶逆变换并产生水印图案; 以及将水印图案拼贴到原始图像上的添加步骤,以及生成嵌入图像。 此外,还提供了一种用于从数字数据中检测水印的水印检测方法,用于从检测到的对象图像上的任意位置分离块的步骤,对该块执行离散付里叶变换并获得序列矩阵的步骤, 用于生成要被检测并由密钥指定的组件的位置信息的步骤,用于通过针对每个位置的项目计算一个序列的平均位移量来检测位置标记序列的步骤 信息,并且提取作为在嵌入水印的开始点与从检测到的对象图像切割的块的开始点之间一致时的平行位移量的偏移信息,以及用于检测从检测到的对象图像切入的嵌入水印的步骤 检测到物体图像。
    • 9. 发明授权
    • Method and apparatus for digital watermarking
    • 数字水印的方法和装置
    • US07640431B2
    • 2009-12-29
    • US10634155
    • 2003-08-04
    • Hiroshi OgawaTakao NakamuraAtsuki TomiokaYouichi Takashima
    • Hiroshi OgawaTakao NakamuraAtsuki TomiokaYouichi Takashima
    • H04L9/32
    • G06T1/0028G06T2201/0052G06T2201/0083H04N1/32154H04N19/467
    • A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading ‘1’ or ‘0’ in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.
    • 一种用于将数字水印数据嵌入数字数据内容的方法包括以下步骤:获得数字数据内容的块数据的频率系数,获得块数据的复杂度,从复杂度获得频率系数的变换量和数字 水印数据,并通过变换频率系数嵌入数字水印数据。 此外,读取数字水印数据的方法包括以下步骤:通过使用基于二进制分布的测试方法来计算读取比特序列中的“1”或“0”的概率,确定是否存在数字 水印数据根据概率,并重构数字水印数据。 另一种方法包括以下步骤:通过对具有加权函数的数字水印序列赋予权重,并重构数字水印数据,在代码理论中进行软判决。