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    • 1. 发明授权
    • Hybrid wavelet and JPEG system and method for compression of color images
    • 混合小波和JPEG系统和彩色图像压缩方法
    • US06389160B1
    • 2002-05-14
    • US09289458
    • 1999-04-09
    • Charles K. ChuiHaishan Wang
    • Charles K. ChuiHaishan Wang
    • G06K900
    • G06T9/007
    • A data encoder and method encodes color image data. The image data include Y, U and V data. A data image quality level is selected, which corresponds to a compression ratio. The Y data is encoded using a wavelet or wavelet-like compression method in accordance with the selected data image quality level. When the compression ratio is less than a threshold value, indicating a low compression ratio, the U and V data are compressed using a JPEG compression method. Otherwise the U and V data are compressed using the wavelet or wavelet-like compression method. The encoded image data includes an indication of which compression method was used to encode the U and V data. When encoded image data is decoded by a data decoder, the decoder determines which compression method was used to encode the U and V data, and then decodes the encoded image data accordingly.
    • 数据编码器和方法对彩色图像数据进行编码。 图像数据包括Y,U和V数据。 选择对应于压缩比的数据图像质量等级。 根据选择的数据图像质量水平,使用小波或小波样压缩方法对Y数据进行编码。 当压缩比小于阈值时,表示低压缩比,使用JPEG压缩方法压缩U和V数据。 否则,使用小波或小波压缩方法压缩U和V数据。 编码图像数据包括用于对U和V数据进行编码的压缩方法的指示。 当编码图像数据被数据解码器解码时,解码器确定使用哪种压缩方法对U和V数据进行编码,然后相应地解码编码图像数据。
    • 4. 发明申请
    • Providing and Displaying Video at Multiple Resolution and Quality Levels
    • 以多重分辨率和质量水平提供和显示视频
    • US20090320081A1
    • 2009-12-24
    • US12173768
    • 2008-07-15
    • Charles K. ChuiHaishan WangDongfang Shi
    • Charles K. ChuiHaishan WangDongfang Shi
    • H04N7/173H04B1/66
    • H04N21/6377H04N7/17318H04N21/23439H04N21/4728H04N21/658H04N21/6587H04N21/845
    • A method provides video from a video data source comprising a sequence of multi-level frames. Each multi-level frame comprises multiple copies of a respective frame. Each copy has an associated video resolution or quality level that is a member of a predefined range of levels that range from a highest level to a lowest level. First video data corresponding to a first portion of a first copy of a respective frame and second video data corresponding to a second portion of a second copy of the respective frame are extracted from the video data source. The video resolution or quality level of the second copy is distinct from that of the first copy. The first and second video data are transmitted to a client device for display. The extracting and transmitting are repeated with respect to successive multi-level frames of the video data source.
    • 一种方法从包括多级帧序列的视频数据源提供视频。 每个多级帧包括相应帧的多个副本。 每个副本具有相关联的视频分辨率或质量级别,其是从最高级别到最低级别的预定义级别范围的成员。 从视频数据源中提取对应于相应帧的第一副本的第一部分的第一视频数据和对应于相应帧的第二副本的第二部分的第二视频数据。 第二个副本的视频分辨率或质量水平与第一个副本的视频分辨率或质量水平不同。 将第一和第二视频数据发送到客户端设备进行显示。 相对于视频数据源的连续多级帧重复提取和发送。
    • 5. 发明授权
    • Computer screen image magnification system and method
    • 计算机屏幕图像放大系统和方法
    • US06407747B1
    • 2002-06-18
    • US09307547
    • 1999-05-07
    • Charles K. ChuiHaishan Wang
    • Charles K. ChuiHaishan Wang
    • G09G500
    • G06T3/0025G09G5/391G09G2340/0407G09G2340/045
    • An image magnifying method and apparatus magnifies a portion of an image displayed on a computer display device. The user of the computer selects a first region (called a magnification window) of the displayed image, for instance using a mouse or trackball pointer device. Image data from the screen buffer for the user selected magnification window is copied to a first buffer. A magnified image is generated from the copied image data and the magnified image is stored in the screen buffer so as to replace the copied image data. When the user moves the screen cursor, or otherwise selects a second magnification window that overlaps with the first, the magnification application copies image data for a combined window, covering both the first and second magnification windows, from the screen buffer to a second buffer. The image data stored in the first buffer is copied into the portion of the second buffer corresponding to the first magnification window, at which point the second buffer contains unmagnified data for the entire combined window. The application generates a magnified image for the second magnification window and stores it in a portion of the second buffer corresponding to the second magnification window. Finally, the portion of the second image buffer corresponding to the combined window is copied into the corresponding portion of the screen buffer. As a result, the magnification window moves smoothly from the first to the second window, without creating any flashing artifacts.
    • 图像放大方法和装置放大显示在计算机显示装置上的图像的一部分。 计算机的用户选择显示图像的第一区域(称为放大窗口),例如使用鼠标或轨迹球指针装置。 来自用户选择的放大窗口的屏幕缓冲区的图像数据被复制到第一缓冲器。 从复印图像数据生成放大图像,并且将放大图像存储在屏幕缓冲器中,以便替换复制的图像数据。 当用户移动屏幕光标或者另外选择与第一放大窗口重叠的第二放大窗口时,放大应用将组合窗口的图像数据复制到第一和第二放大窗口,从屏幕缓冲器到第二缓冲器。 存储在第一缓冲器中的图像数据被复制到与第一放大窗口对应的第二缓冲器的部分中,此时第二缓冲器包含整个组合窗口的未放大数据。 应用程序生成用于第二放大窗口的放大图像并将其存储在对应于第二放大窗口的第二缓冲器的一部分中。 最后,对应于组合窗口的第二图像缓冲器的部分被复制到屏幕缓冲器的相应部分。 结果,放大窗口从第一窗口平滑地移动到第二窗口,而不产生任何闪烁的伪影。
    • 9. 发明授权
    • Graphic image re-encoding and distribution system and method
    • 图像重编码和分配系统及方法
    • US07162080B2
    • 2007-01-09
    • US09952443
    • 2001-09-13
    • Charles K. ChuiHaishan Wang
    • Charles K. ChuiHaishan Wang
    • G06K9/00
    • G06T9/00G06T9/005
    • An image file, which typically represents a palette-based image that has been encoded using a first predefined run-length based encoding method, is decoded to produce an image data array. The image data array is divided into blocks; either all the blocks or a majority of the blocks have a predefined fixed size. At least some of the blocks of the image are processed to produce a corresponding re-encoded block. In particular, each such block is processed by applying a plurality of distinct encodings to the block to produce an equal plurality of distinct re-encoded block versions. One of the plurality of distinct re-encoded block versions is selected in accordance with predefined selection criteria for use as the re-encoded block. Each re-encoded block is stored in a distinct data structure, such as a file. In a client-server network, when a low bandwidth client device requests an image file, just the block image files needed by the client device are downloaded, thereby greatly reducing the request to display delay.
    • 通常代表使用基于第一预定游程长度的编码方法编码的基于调色板的图像的图像文件被解码以产生图像数据阵列。 图像数据阵列被划分成块; 所有块或块的大部分都具有预定义的固定大小。 图像的至少一些块被处理以产生相应的重新编码的块。 特别地,每个这样的块通过将多个不同的编码应用于块来处理,以产生相等的多个不同的重新编码块版本。 根据用作重新编码块的预定义选择标准来选择多个不同重新编码块版本中的一个。 每个重新编码的块被存储在不同的数据结构中,例如文件。 在客户端 - 服务器网络中,当低带宽客户端设备请求图像文件时,仅下载客户端设备所需的块映像文件,从而大大减少了显示延迟的请求。