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    Color quantization and similarity measure for content based image retrieval
    8.
    发明授权
    Color quantization and similarity measure for content based image retrieval 失效
    基于内容的图像检索的颜色量化和相似性度量

    公开(公告)号：US06721449B1

    公开(公告)日：2004-04-13

    申请号：US09110613

    申请日：1998-07-06

    申请人： Santhana Krishnamachari

    发明人： Santhana Krishnamachari

    IPC分类号： G06K900

    CPC分类号： G06F17/3025 ,  Y10S707/99945 ,  Y10S707/99948

    摘要： The invention determines the degree of similarity between a target image and each of a plurality of reference images. The measure used for the degree of similarity between images is based on the human perceptive system, so that images that appear to a human to be similar in color have a higher similarity measure than images that appear to a human to be dissimilar in color. Each of the most populous colors of each partition of the target image is associated with a color in a corresponding partition of the reference image that is closest to the target image color. The similarity measure is based on the number of occurrences of each of these associated colors in the corresponding partitions, as well as the color difference between these associated colors. Thus, images that have similar, albeit not identical, colors, will have a higher similarity measure than images that have dissimilar colors. In a preferred embodiment, color difference is determined based upon the CIE luminance-chrorinance color space. Also, in a preferred embodiment, the target image color is quantized into a set of discrete colors that are based upon the predominant colors in the reference images.

    摘要翻译： 本发明确定目标图像与多个参考图像中的每一个之间的相似度。 用于图像之间的相似度的度量是基于人类感知系统，使得对于人类来说似乎与颜色相似的图像具有比人类看起来与颜色不同的图像更高的相似性度量。 目标图像的每个分区的人口最多的颜色中的每一个与最接近目标图像颜色的参考图像的对应分区中的颜色相关联。 相似性度量基于相应分区中的这些相关联的颜色中的每一个的出现次数以及这些相关联的颜色之间的色差。 因此，具有相似但尽管不相同的颜色的图像将具有比具有不同颜色的图像更高的相似性度量。 在优选实施例中，基于CIE亮度 - 亮度色空间来确定色差。 此外，在优选实施例中，目标图像颜色被量化为基于参考图像中的主要颜色的一组离散颜色。

    System and method for rotation invariant representation of texture in images
    9.
    发明授权
    System and method for rotation invariant representation of texture in images 有权
    用于图像中纹理的旋转不变表示的系统和方法

    公开(公告)号：US06546155B1

    公开(公告)日：2003-04-08

    申请号：US09366698

    申请日：1999-08-04

    申请人： Santhana Krishnamachari

    发明人： Santhana Krishnamachari

    IPC分类号： G06K932

    CPC分类号： G06F17/30262 ,  G06T7/46

    摘要： There is disclosed an image processing device capable of receiving an image file having a first texture representation in rotation variant format and converting the texture representation to a modified texture representation in a rotation invariant format. The image processing device comprises an image processor for analyzing rotation variant texture parameters in the first texture representation and converting them to 1) rotation invariant texture parameters disposed in circular rings about a selected pixel; or 2)rotation invariant texture parameters disposed along radial lines extending through the selected pixel. In the second embodiment, the image processor can use the angular separation of the radial lines to determine the angular rotation of a rotated version of the image file.

    摘要翻译： 公开了一种图像处理装置，其能够接收具有旋转变体格式的第一纹理表示的图像文件，并将纹理表示转换为旋转不变格式的修改的纹理表示。 所述图像处理装置包括图像处理器，用于分析所述第一纹理表示中的旋转变体纹理参数并将其转换为1）围绕选定像素设置在圆环中的旋转不变纹理参数; 或2）沿着延伸穿过所选择的像素的径向线设置的旋转不变纹理参数。 在第二实施例中，图像处理器可以使用径向线的角度间隔来确定图像文件的旋转版本的角旋转。

    Encoder redundancy selection system and method
    10.
    发明授权
    Encoder redundancy selection system and method 有权
    编码器冗余选择系统及方法

    公开(公告)号：US06910175B2

    公开(公告)日：2005-06-21

    申请号：US09952193

    申请日：2001-09-14

    申请人： Santhana Krishnamachari

    发明人： Santhana Krishnamachari

    IPC分类号： H04L1/00 ,  H03M13/00 ,  H04N19/89 ,  H04N19/895

    CPC分类号： H04N19/89 ,  H03M13/00 ,  H04N19/895

    摘要： A system and method that selects an encoder redundancy scheme based on the projected cost of concealing the errors using an anticipated error concealment strategy. The invention provides a system for encoding a data set, comprising: a system that anticipates an error concealment strategy that will be used by a decoder in the event that the data set contains errors when received by the decoder; an analysis system that projects a cost for concealing the errors using the error concealment strategy; and a system that selects a redundancy scheme for encoding the data set based on the projected cost of concealing the errors using the error concealment strategy. Also provided is a decoder system for decoding packets of data, comprising: at least one error concealment strategy for concealing errors in an erroneously received packet of data; and a feedback system that provides feedback information regarding the error concealment strategy used by the decoder system to conceal the errors.

    摘要翻译： 基于使用预期的错误隐藏策略隐藏错误的预计成本来选择编码器冗余方案的系统和方法。 本发明提供了一种用于对数据集进行编码的系统，包括：系统，其在数据集在由解码器接收时包含错误的情况下预期将由解码器使用的错误隐藏策略; 一个使用错误隐藏策略来计算隐藏错误的成本的分析系统; 以及基于使用错误隐藏策略隐藏错误的投影成本来选择用于对数据集进行编码的冗余方案的系统。 还提供了一种用于解码数据分组的解码器系统，包括：用于隐藏错误接收的数据分组中的错误的至少一个错误隐藏策略; 以及反馈系统，其提供关于解码器系统用于隐藏错误的错误隐藏策略的反馈信息。