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    • 1. 发明申请
    • System, method and computer program product for fingerprint verification
    • US20100150411A1
    • 2010-06-17
    • US12651834
    • 2010-01-04
    • ROGER A. BAUCHSPIES
    • ROGER A. BAUCHSPIES
    • G06K9/00
    • G06K9/001
    • A computer program product comprising a computer readable medium carrying program instructions for verifying a fingerprint when executed using a computing system, the executed program instructions executing a method, the method: producing a test image of a fingerprint-under-test; producing a test ridge map from the test image and a reference ridge map from each of one or more reference fingerprint images; extracting fingerprint points of interest from the ridge maps; screening candidate reference ridge maps based upon a correspondence between the points of interest from the reference ridge maps and the points of interest from the test ridge map wherein the correspondence includes a first threshold and one or more candidate ridge maps having the correspondence within the first threshold are included in a set of candidate ridge maps; comparing local ridge data surrounding one or more points of interest of the test ridge map within a second threshold with local ridge data surrounding corresponding one or more points of interest of each of the test ridge maps in the set of candidate ridge maps; and asserting a comparison signal responsive to a correspondence between the local ridge data of the test ridge map and the local ridge data from one or more candidate ridge maps of the set of candidate ridge maps.
    • 3. 发明授权
    • System, method and computer program product for fingerprint verification
    • 用于指纹验证的系统,方法和计算机程序产品
    • US07643660B1
    • 2010-01-05
    • US10897316
    • 2004-07-22
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06K9/00G06K9/62
    • G06K9/001
    • A computer program product comprising a computer readable medium carrying program instructions for verifying a fingerprint when executed using a computing system, the executed program instructions executing a method, the method: producing a test image of a fingerprint-under-test; producing a test ridge map from the test image and a reference ridge map from each of one or more reference fingerprint images; extracting fingerprint points of interest from the ridge maps; screening candidate reference ridge maps based upon a correspondence between the points of interest from the reference ridge maps and the points of interest from the test ridge map wherein the correspondence includes a first threshold and one or more candidate ridge maps having the correspondence within the first threshold are included in a set of candidate ridge maps; comparing local ridge data surrounding one or more points of interest of the test ridge map within a second threshold with local ridge data surrounding corresponding one or more points of interest of each of the test ridge maps in the set of candidate ridge maps; and asserting a comparison signal responsive to a correspondence between the local ridge data of the test ridge map and the local ridge data from one or more candidate ridge maps of the set of candidate ridge maps.
    • 一种计算机程序产品,包括计算机可读介质,所述计算机可读介质承载用于在使用计算系统执行时验证指纹的程序指令,所执行的程序指令执行方法,所述方法:产生未被测试的指纹的测试图像; 从测试图像产生测试脊图和来自一个或多个参考指纹图像中的每一个的参考脊图; 从脊图提取指纹点; 基于来自参考脊图的兴趣点与来自测试脊图的兴趣点之间的对应来筛选候选参考脊图,其中对应包括第一阈值和具有第一阈值内的对应关系的一个或多个候选脊图 包括在一组候选脊图中; 将在第二阈值内的测试脊图的一个或多个感兴趣点的局部脊数据与围绕所述一组候选脊图中的每个测试脊图的相应一个或多个兴趣点的局部脊数进行比较; 并且响应于测试脊图的局部脊数据与来自一组候选脊图的一个或多个候选脊图的局部脊数据之间的对应关系来确定比较信号。
    • 4. 发明授权
    • Spatial compression and decompression for video
    • 视频的空间压缩和解压缩
    • US5675382A
    • 1997-10-07
    • US630431
    • 1996-04-08
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06T9/00H03M7/42H04N1/64H04N7/26H04N7/30H04N7/34H04N7/36H04N11/04H04N1/419
    • H04N1/648H03M7/42H04N19/507H04N19/593H04N11/042H04N19/13H04N19/60H04N19/91
    • A spatial compression and decompression system for color video data wherein a video stream is generated by a charge-coupled device with red, green and blue pixel elements. In a first compression stage, the 5-bit color data from each element is processed in turn. This step involves reading out from a lookup memory a 3-bit category (or compressed value) and 5-bit output value based on the 5-bit color data, a 5-bit previous value that represents same color data for a neighboring pixel and a 1-bit table select signal that determines in which of two similar tables the lookup is performed. The 3-bit category data for a pixel's three elements are combined and used as a 9-bit index into a Huffman table that performs the second stage of compression. Each Huffman table entry includes a variable-length Huffman code that represents more common categories with fewer bits, which provides additional compression over the first stage. The Huffman table reads out the code of the particular 9-bit category used for the lookup. This code is packed into an output buffer and transmitted to the decompressor that will unpack for display or store the resulting compressed data stream. In the first decompression stage, each Huffman code in the compressed data stream is decoded using no more than two compares and one table lookup into an inverse Huffman decode table. The resulting 9-bit category is used as an index into one of two similar inverse lookup tables, which outputs the appropriate 16-bit uncompressed data value.
    • 一种用于彩色视频数据的空间压缩和解压缩系统,其中视频流由具有红色,绿色和蓝色像素元素的电荷耦合器件产生。 在第一压缩级中,依次处理来自每个元件的5位彩色数据。 该步骤包括从查找存储器读出基于5位颜色数据的3位类别(或压缩值)和5位输出值,表示相邻像素的相同颜色数据的5位先前值,以及 确定在两个相似表中的哪一个执行查找的1位表选择信号。 像素的三个元素的3位类别数据被组合,并被用作执行第二阶段压缩的霍夫曼表中的9位索引。 每个霍夫曼表格条目包括一个可变长度的霍夫曼代码,其代表具有较少位的更常见的类别,这在第一阶段提供额外的压缩。 霍夫曼表读出用于查找的特定9位类别的代码。 该代码被打包到输出缓冲器中并被传送到解压缩器,解压缩器将解压缩以显示或存储所生成的压缩数据流。 在第一解压缩阶段,压缩数据流中的每个霍夫曼代码使用不多于两个的比较和一个表查找被解码成反霍夫曼解码表。 所得到的9位类别用作两个类似的反向查找表中的一个的索引,其输出适当的16位未压缩数据值。
    • 6. 发明授权
    • System, method and computer program product for image compression/decompression
    • 用于图像压缩/解压缩的系统,方法和计算机程序产品
    • US07697773B1
    • 2010-04-13
    • US10897965
    • 2004-07-22
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06K9/36
    • H03M7/40H04N19/91H04N19/93
    • Disclosed is an apparatus, method, and computer program product for an image compression/decompression. The method for compressing a data structure having a first plurality of sets of image elements with one or more predetermined relationships among the image elements and among the sets, and includes encoding a first set of the plurality of image elements using a variable-length encoding process; and encoding a second set of the plurality of image elements using a modification to the variable length encoding process that decreases a symbol composition size of the variable length encoding process responsive to the one or more predetermined relationships among the image elements and the sets. The computer program product includes instructions executable by a processing unit, and those instructions perform the compression/decompression as described herein. The system is a compression/decompression apparatus for dynamically determining a probability of symbols used in a variable length encoding based upon previously encoded elements of the data structure.
    • 公开了一种用于图像压缩/解压缩的装置,方法和计算机程序产品。 一种用于压缩具有第一组多个图像元素的数据结构的方法,所述第一组图像元素在图像元素之间以及所述图像元素之间具有一个或多个预定关系,并且包括使用可变长度编码处理来对所述多个图像元素的第一组进行编码 ; 以及使用对所述可变长度编码处理的修改对所述多个图像元素的第二集合进行编码,所述可变长度编码处理响应于所述图像元素和所述集合中的所述一个或多个预定关系而减小所述可变长度编码处理的符号组合尺寸。 计算机程序产品包括可由处理单元执行的指令,并且这些指令执行如本文所述的压缩/解压缩。 该系统是一种压缩/解压缩装置,用于基于先前编码的数据结构元素动态地确定在可变长度编码中使用的符号的概率。
    • 8. 发明授权
    • System, method and computer program product for fingerprint verification
    • 用于指纹验证的系统,方法和计算机程序产品
    • US07970186B2
    • 2011-06-28
    • US12651834
    • 2010-01-04
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06K9/00
    • G06K9/001
    • A computer program product comprising a computer readable medium carrying program instructions for verifying a fingerprint when executed using a computing system, the executed program instructions executing a method, the method: producing a test image of a fingerprint-under-test; producing a test ridge map from the test image and a reference ridge map from each of one or more reference fingerprint images; extracting fingerprint points of interest from the ridge maps; screening candidate reference ridge maps based upon a correspondence between the points of interest from the reference ridge maps and the points of interest from the test ridge map wherein the correspondence includes a first threshold and one or more candidate ridge maps having the correspondence within the first threshold are included in a set of candidate ridge maps; comparing local ridge data surrounding one or more points of interest of the test ridge map within a second threshold with local ridge data surrounding corresponding one or more points of interest of each of the test ridge maps in the set of candidate ridge maps; and asserting a comparison signal responsive to a correspondence between the local ridge data of the test ridge map and the local ridge data from one or more candidate ridge maps of the set of candidate ridge maps.
    • 一种计算机程序产品,包括计算机可读介质,所述计算机可读介质承载用于在使用计算系统执行时验证指纹的程序指令,所执行的程序指令执行方法,所述方法:产生未被测试的指纹的测试图像; 从测试图像产生测试脊图和来自一个或多个参考指纹图像中的每一个的参考脊图; 从脊图提取指纹点; 基于来自参考脊图的兴趣点与来自测试脊图的兴趣点之间的对应关系来筛选候选参考脊图,其中对应包括第一阈值和具有第一阈值内的对应关系的一个或多个候选脊图 包括在一组候选脊图中; 将在第二阈值内的测试脊图的一个或多个感兴趣点的局部脊数据与围绕所述一组候选脊图中的每个测试脊图的相应一个或多个兴趣点的局部脊数进行比较; 并且响应于测试脊图的局部脊数据与来自一组候选脊图的一个或多个候选脊图的局部脊数据之间的对应关系来确定比较信号。
    • 9. 发明授权
    • System, method, and computer program product for ridge map formation
    • 系统,方法和计算机程序产品用于脊图形成
    • US07512256B1
    • 2009-03-31
    • US10897310
    • 2004-07-22
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06K9/00
    • G06K9/00073
    • Disclosed is an apparatus, method, and computer program product for ridge map formation. The method for processing an image data structure to extract a feature defined by a plurality of contiguous data elements includes identifying a set of candidate image feature pixels, the set including one or more pixels from the image data structure; examining local image data surrounding one or more pixels of the set of candidate image feature pixels to identify a set of potential image feature pixels with each of the potential image feature pixels having a characteristic consistent with being associated with the feature; and identifying the feature in the image data using the set of potential image feature pixels by locating one or more of the plurality of contiguous data elements neighboring one or more pixels of the set of potential image feature pixels. The computer program product includes instructions executable by a processing unit, and those instructions perform the feature extraction as described herein. The system is an apparatus for processing an image data structure to extract a feature defined by a plurality of contiguous data elements.
    • 公开了一种用于脊图形成的装置,方法和计算机程序产品。 用于处理图像数据结构以提取由多个连续数据元素定义的特征的方法包括从图像数据结构中识别候选图像特征像素集合,该集合包括一个或多个像素; 检查所述候选图像特征像素集合中的一个或多个像素周围的局部图像数据,以识别潜在图像特征像素的集合,其中每个潜在图像特征像素具有与所述特征相关联的特征; 以及通过定位与所述潜在图像特征像素组中的一个或多个像素相邻的所述多个相邻数据元素中的一个或多个来识别所述图像数据中的特征。 计算机程序产品包括可由处理单元执行的指令,并且这些指令执行如本文所述的特征提取。 该系统是用于处理图像数据结构以提取由多个相邻数据元素定义的特征的装置。
    • 10. 发明授权
    • Temporal compression and decompression for video
    • 视频的时间压缩和解压缩
    • US6008847A
    • 1999-12-28
    • US810589
    • 1997-03-03
    • Roger A. Bauchspies
    • Roger A. Bauchspies
    • G06T9/00H03M7/42H04N1/64H04N7/26H04N7/30H04N7/34H04N7/36H04N11/04H04N7/12
    • H04N1/648H03M7/42H04N19/507H04N19/593H04N11/042H04N19/13H04N19/60H04N19/91
    • A temporal compression and decompression system is disclosed for color video. A video stream with red, green and blue pixel element values is input to a first computer. In the first computer, a new frame of video data is compared to the frame being displayed on a second computer and the similarity between corresponding blocks and sub-blocks is represented with one tolerance result per sub-block. Based on the number of sub-blocks for which tolerance results exceed a preset threshold and a user-specified quality level, an update quality level is selected that determines the quality at which the frame update is transmitted from the first computer to the second computer. Before the frame update is transmitted the updating information is compressed in a two-stage process. In the first stage 5-bit red, blue and green element values in sub-blocks being updated are is converted to 3-bit categories. In the second stage groups of categories are converted to variable-length Huffman words. The Huffman words are then transmitted over a communications channel to the second computer, which decompresses and displays the updated sub-blocks.
    • 公开了一种用于彩色视频的时间压缩和解压缩系统。 具有红色,绿色和蓝色像素元素值的视频流被输入到第一计算机。 在第一计算机中,将新的视频数据帧与在第二计算机上显示的帧进行比较,并且用每个子块的一个公差结果来表示对应块和子块之间的相似度。 基于公差结果超过预设阈值和用户指定质量水平的子块的数量,选择确定从第一计算机向第二计算机发送帧更新的质量的更新质量等级。 在发送帧更新之前,更新信息在两级处理中被压缩。 在第一阶段,正在更新的子块中的5位红色,蓝色和绿色元素值被转换为3位类别。 在第二阶段,类别组被转换为可变长度的霍夫曼词。 然后,霍夫曼字通过通信信道发送到第二计算机,其解压缩并显示更新的子块。