中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

5 records (took 0.017 seconds)

    WATERMARKING METHOD RESISTANT TO GEOMETRIC ATTACK IN WAVELET TRANSFORM DOMAIN
    1.
    发明申请
    WATERMARKING METHOD RESISTANT TO GEOMETRIC ATTACK IN WAVELET TRANSFORM DOMAIN 审中-公开
    WATERMARKING方法抵抗小波变换域中的几何攻击

    公开(公告)号：US20090060257A1

    公开(公告)日：2009-03-05

    申请号：US11847041

    申请日：2007-08-29

    Applicant: Heung Kyu LEE ,  Choong Hoon LEE

    Inventor： Heung Kyu LEE ,  Choong Hoon LEE

    IPC: G06K9/00

    CPC classification number: G06T1/0064 ,  G06T2201/0052 ,  G06T2201/0065 ,  G06T2201/0083

    Abstract: The present invention relates, in general, to a watermarking method resistant to a geometric attack in a wavelet transform domain, and, more particularly, to technology for embedding a watermark in a discrete wavelet transform (DWT) domain, thus extracting autocorrelation (AC) peaks, which play an important part in the estimation of geometric attacks in ACF-based watermarking, and detecting watermarks using the AC peaks even after geometric distortion is applied. In the watermarking method of the present invention, a watermark pattern is embedded in subbands of a Discrete Wavelet Transform (DWT) domain. An Autocorrelation Function (ACF) of a watermark is executed in the domain, thus detecting a watermark required to estimate a geometric attack. A watermark signal is detected using an undecimated wavelet transform so as to compensate for an image shift in the watermark.

    Abstract translation: 本发明一般涉及一种抵抗小波变换域中的几何攻击的水印方法，更具体地说，涉及一种用于在离散小波变换（DWT）域中嵌入水印的技术，从而提取自相关（AC） 峰值，在基于ACF的水印中几何攻击的估计中起重要作用，并且即使在应用几何失真之后也使用AC峰值检测水印。 在本发明的水印方法中，将水印图案嵌入在离散小波变换（DWT）域的子带中。 在域中执行水印的自相关函数（ACF），从而检测估计几何攻击所需的水印。 使用未切换的小波变换来检测水印信号，以补偿水印中的图像偏移。

    CATALYST COMPOSITION INCLUDING TRANSITION METAL COMPLEXES AND OLEFIN POLYMERIZATION USING THE SAME
    4.
    发明申请
    CATALYST COMPOSITION INCLUDING TRANSITION METAL COMPLEXES AND OLEFIN POLYMERIZATION USING THE SAME 有权
    催化剂组合物，包括过渡金属络合物和使用其的烯烃聚合

    公开(公告)号：US20070179046A1

    公开(公告)日：2007-08-02

    申请号：US11670259

    申请日：2007-02-01

    Applicant: Eunjung LEE ,  Choong Hoon LEE ,  Seungwhan JUNG ,  Jung A LEE ,  Boram LEE

    Inventor： Eunjung LEE ,  Choong Hoon LEE ,  Seungwhan JUNG ,  Jung A LEE ,  Boram LEE

    IPC: C08F4/02

    CPC classification number: C08F10/00 ,  C08F4/65908 ,  C08F4/65912 ,  C08F210/16 ,  C08F2410/03 ,  C08F2420/02 ,  Y10S526/943 ,  C08F4/6592 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/08

    Abstract: Provided is catalyst composition including a transition metal complex precatalyst represented by Formula 1; a first cocatalyst represented by Formula 2 which is an alkylaluminum compound; and a second cocatalyst represented by Formula 3 which is a salt compound comprising a Bronsted acid cation and a noncoordinating, compatible anion. Here, R1, R2, R3, R4, E, Q1, Q2 and M are defined in the specification. Al(R6)3 Formula 2 Here, R6 is defined in the specification. [L-H]+[ZA4]− Here, L, [L-H]+, Z and A are defined in the specification.A catalyst composition including binuclear transition metal complexes, an alkylaluminum compound, and a salt compound including a Bronsted acid cation, and a noncoordinating, compatible anion, and a method of preparing the catalyst composition are provided. The activity of the catalyst composition has been improved. The catalyst composition can be effectively used for copolymerization of ethylene with monomers having structural inherence, and a polyolefin copolymer having a very low density less than 0.910 g/cc can be obtained by using the catalyst composition.

    Abstract translation: 提供了包含式1表示的过渡金属络合物预催化剂的催化剂组合物; 由式2表示的作为烷基铝化合物的第一助催化剂; 和由式3表示的第二助催化剂，其是包含布朗斯台德酸阳离子和非配位的相容阴离子的盐化合物。 这里，R 1，R 2，R 3，R 4，E，Q 1， / SUB>，Q 2和M在说明书中定义。 <？in-line-formula description =“In-line formula”end =“lead”？> Al（R 6）3式2 < 公式描述=“在线公式”end =“tail”？>这里，在说明书中定义了R 6。 <？in-line-formula description =“In-line Formulas”end =“lead”？> [LH] + [ZA SUP> <？in-line-formula description =“In-line Formulas”end =“tail”？>这里，L，[LH] +，Z和A在本说明书中定义。 提供了包含双核过渡金属配合物，烷基铝化合物和包含布朗斯台德酸阳离子和非配位相容性阴离子的盐化合物的催化剂组合物和制备该催化剂组合物的方法。 催化剂组合物的活性得到改善。 催化剂组合物可以有效地用于乙烯与具有结构相干性的单体的共聚，并且通过使用催化剂组合物可以获得具有非常低的密度小于0.910g / cc的聚烯烃共聚物。

    TRANSITION METAL COMPLEX, CATALYST COMPOSITION INCLUDING THE SAME AND OLEFIN POLYMER USING CATALYST COMPOSITION
    5.
    发明申请
    TRANSITION METAL COMPLEX, CATALYST COMPOSITION INCLUDING THE SAME AND OLEFIN POLYMER USING CATALYST COMPOSITION 有权
    过渡金属复合物，催化剂组合物和含烯烃聚合物的催化剂组合物

    公开(公告)号：US20110152529A1

    公开(公告)日：2011-06-23

    申请号：US13041526

    申请日：2011-03-07

    Applicant: Choong Hoon LEE ,  Eun Jung LEE ,  Seungwhan JUNG ,  Boram LEE ,  Jung A. Lee ,  Bun Yeoul LEE

    Inventor： Choong Hoon LEE ,  Eun Jung LEE ,  Seungwhan JUNG ,  Boram LEE ,  Jung A. Lee ,  Bun Yeoul LEE

    IPC: C07D215/14 ,  C07D215/04

    CPC classification number: C07F17/00 ,  C07D209/08 ,  C07D215/12 ,  C07D215/14 ,  C08F4/65908 ,  C08F4/65912 ,  C08F10/00 ,  C08F210/16 ,  C08F2420/02 ,  Y10S526/943 ,  C08F4/6592 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/08 ,  C08F210/08

    Abstract: Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin polymer using the catalyst composition. The transition metal complex has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, a sterically hindered monomer can easily approach the transition metal complex. By using a catalyst composition including the transition metal complex, a linear low density polyolefin copolymer having a high molecular weight and a very low density polyolefin copolymer having a density of 0.910 g/cc or less can be produced in a polymerization of monomers having large steric hindrance. Further, the reactivity for the olefin monomer having large steric hindrance is excellent.

    Abstract translation: 提供一种新颖的过渡金属络合物，其中引入了酰氨基的单环戊二烯基配位体，包含它们的催化剂组合物和使用该催化剂组合物的烯烃聚合物。 过渡金属络合物具有通过在金属部位附近形成稳定的键的亚苯基连接的酰胺基的五
    元环结构，因此空间位阻单体容易接近过渡金属络合物。 通过使用包含过渡金属络合物的催化剂组合物，可以在具有大立体的单体的聚合中产生具有高分子量的线性低密度聚烯烃共聚物和密度为0.910g / cc以下的极低密度聚烯烃共聚物 障碍 此外，具有大空间位阻的烯烃单体的反应性优异。

Patent Agency Ranking