公开(公告)号：US20050036613A1

公开(公告)日：2005-02-17

申请号：US10635347

申请日：2003-08-06

申请人： Wensheng Zhou ,  Hua Xie

发明人： Wensheng Zhou ,  Hua Xie

IPC分类号： G06T1/00 ,  H04N1/32 ,  H04N7/16 ,  H04N7/167 ,  H04N7/173

CPC分类号： G06T1/005 ,  G06T2201/0052 ,  G06T2201/0065 ,  G06T2201/0083 ,  H04N1/3216 ,  H04N1/32187 ,  H04N7/162 ,  H04N7/1675 ,  H04N7/17318 ,  H04N21/234309 ,  H04N21/2347 ,  H04N21/2543 ,  H04N21/4405 ,  H04N21/44204 ,  H04N21/8358 ,  H04N2201/3233 ,  H04N2201/327

摘要： A Discrete Fourier Transform watermark for use with digital images/video. A Y component of a Y, U(Cb), V(Cr) digital data stream representing color components of digital video is extracted as the digital data for embedding the watermark. The digital data is then scaled to a standard size. A Discrete Fourier Transform (DFT) is performed on the digital data, and a magnitude domain of the Discrete Fourier Transform is computed. The watermark is embedded into selected frequency bands of the computed magnitude domain of the Discrete Fourier Transform, thereby creating a watermarked magnitude domain. The selected frequency bands comprise one or more middle frequency bands, and the middle frequency bands comprise a band of circular rings of the magnitude domain. An inverse Discrete Fourier Transform is performed on the watermarked magnitude domain to reconstruct the digital data with the embedded watermark.

摘要翻译： 用于数字图像/视频的离散傅里叶变换水印。 提取表示数字视频的颜色分量的Y，U（Cb），V（Cr）数字数据流的Y分量作为用于嵌入水印的数字数据。 然后将数字数据缩放到标准尺寸。 对数字数据执行离散傅里叶变换（DFT），并且计算离散傅立叶变换的幅度域。 将水印嵌入到离散傅里叶变换的计算幅度域的选定频带中，从而创建水印幅度域。 所选择的频带包括一个或多个中频段，并且中频段包括幅度域的圆环带。 对水印幅度域进行逆离散傅里叶变换，以嵌入水印重构数字数据。

公开(公告)号：US20050021136A1

公开(公告)日：2005-01-27

申请号：US10770978

申请日：2004-02-02

申请人： Hua Xie ,  Lisa Buckley

发明人： Hua Xie ,  Lisa Buckley

IPC分类号： A61F2/06 ,  A61F2/24

CPC分类号： A61F2/2418 ,  A61F2/2475 ,  A61F2220/0075 ,  A61F2230/0026

摘要： A bioprosthetic valve graft comprises a valve frame and valve flaps, the latter acting to open or close a valve aperture to directionally control fluid flow through the bioprosthesis. The bioprosthetic valve graft comprises method for suturelessly attaching a biomaterial suturelessly bonded to the A method for securing a biomaterial to a valve frame includes positioning a flexible valve frame defining an open area on a first major surface of a biomaterial sheet having a peripheral edge, wherein positioning serves to approximate the valve frame and the peripheral edge of the biomaterial sheet to form an at least first bonding locus: and suturelessly bonding the biomaterial to the valve frame at the at least first bonding locus. The method avoids the disadvantages associated with conventional sutures and substantially reduces medical complications in implantations.

摘要翻译： 生物假体瓣膜移植物包括阀框架和瓣瓣，后者用于打开或关闭阀孔以定向地控制通过生物假体的流体流动。 生物假体瓣膜移植物包括用于将无缝结合到A方法上的生物材料无缝连接的方法，用于将生物材料固定到瓣膜框架上的方法包括将限定开口区域的柔性瓣膜框架定位在具有周边边缘的生物材料片材的第一主表面上，其中 定位用于近似生物材料板的阀框架和周边边缘以形成至少第一粘合位置;以及在至少第一粘合位置处将生物材料无缝地结合到阀框架。 该方法避免了与常规缝线相关的缺点并且显着减少了植入物中的医疗并发症。