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1. 发明授权

US08594384B2 Method and system for measuring text-rendering quality 有权
标题翻译：测量文本渲染质量的方法和系统
公开(公告)号：US08594384B2
公开(公告)日：2013-11-26
申请号：US12744912
申请日：2007-11-30
申请人： Ayelet Pnueli , Renato Keshet , Avi Schori , Yaron Ruckenstein
发明人： Ayelet Pnueli , Renato Keshet , Avi Schori , Gitit Ruckenstein
IPC分类号： G06K9/00
CPC分类号： G06T7/0002 , G06K9/036 , G06T2207/30168
摘要： Method embodiments of the present invention provide for semi-automated or fully automated assessment of the quality of device-rendered text, including graphical symbols, characters, and other printable or displayable patterns. Method embodiments of the present invention employ one or more metrics that involve the comparison of input characters, including text characters, symbols, and character-like graphics, with corresponding digital output characters obtained by capturing images of characters rendered by a character-rendering device. The one or more metrics include individual computed relative entropy APQi metrics, reflective of differences in character-to-character distance distributions between one input character c, and the set of input characters c*, a cumulative computed relative entropy APQ, stroke irregularity, contrast measure, sharpness, and background uniformity. These individual metrics can be computed and stored separately as well as output to a user of a character-rendering-quality measurement system, or may be combined together in various ways to produce one or more comprehensive, cumulative metrics for storage and output.
摘要翻译：本发明的方法实施例提供对设备渲染文本的质量的半自动或全自动评估，包括图形符号，字符和其他可打印或可显示的图案。本发明的方法实施例采用一种或多种度量，其涉及将包括文本字符，符号和字符状图形的输入字符与通过捕获由字符再现设备呈现的字符的图像获得的相应数字输出字符的比较。一个或多个指标包括单个计算的相对熵APQi度量，反映一个输入字符c与输入字符组c *之间的字符与字符之间的距离差异，累积计算的相对熵APQ，笔画不规则度，对比度测量，清晰度和背景均匀性。这些单独度量可被计算并分开存储以及输出到字符再现质量测量系统的用户，或者可以以各种方式组合在一起以产生用于存储和输出的一个或多个综合累积度量。

2. 发明授权

US09313367B2 Image compression 有权
标题翻译：图像压缩
公开(公告)号：US09313367B2
公开(公告)日：2016-04-12
申请号：US12598033
申请日：2007-04-30
申请人： Gidi Amir , Doron Shaked , Ruth Bergman , Gitit Ruckenstein , Leonid Vygodner , Alexander Spivakovsky , Andrey Iossifov , Yaron Ruckenstein
发明人： Gidi Amir , Doron Shaked , Ruth Bergman , Gitit Ruckenstein , Leonid Vygodner , Alexander Spivakovsky , Andrey Iossifov
IPC分类号： G06K15/02 , H04N1/41
CPC分类号： H04N1/41
摘要： A method for compressing a digital image to be printed, the image consisting of pixels. It is determined, for blocks of pixels, whether a block contains a graphical structure that is to be maintained without loss because it is of a type that can be accurately perceived by a human observer. The block is encoded losslessly into a less voluminous format, if such a graphical structure has been found. Otherwise, the block is compressed lossily, if no such graphical structure has been found.
摘要翻译：一种用于压缩要打印的数字图像的方法，由像素组成的图像。对于像素块，确定块是否包含将被维持而没有损失的图形结构，因为它是可被人类观察者精确地感知的类型。如果已经发现这样的图形结构，则该块被无损编码成较少的格式。否则，如果没有找到这样的图形结构，则块被有损压缩。

3. 发明授权

US07551773B2 Encoding image data using mask lookup table and decoding such encoded image data 有权
标题翻译：使用掩码查找表对图像数据进行编码，并解码这样的编码图像数据
公开(公告)号：US07551773B2
公开(公告)日：2009-06-23
申请号：US10912034
申请日：2004-08-05
申请人： Ruth Bergman , Gitit Ruckenstein , Doron Shaked , Renato Keshet
发明人： Ruth Bergman , Gitit Ruckenstein , Doron Shaked , Renato Keshet
IPC分类号： G06K9/00
CPC分类号： H04N19/90 , H04N19/126 , H04N19/14 , H04N19/176 , H04N19/593
摘要： In one aspect, an image is quantized by assigning sub-ranges of pixel values in the image to respective quantization levels. The quantized image is encoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels. In another aspect, a code corresponding to an encoded image with pixel values quantized to respective quantization levels is received. The code is decoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels.
摘要翻译：在一个方面，通过将图像中的像素值的子范围分配到相应的量化级别来对图像进行量化。至少部分地对量化图像进行编码，该掩码查找表将索引值分配给相应的掩码，其中每个掩码对应于量化级别的相应空间分布。在另一方面，接收对应于被量化为相应量化级的像素值的编码图像的代码。该代码至少部分地基于将各个掩码分配索引值的掩码查找表进行解码，其中每个掩码对应于量化级别的相应空间分布。

4. 发明申请

US20060028686A1 Encoding image data using mask lookup table and decoding such encoded image data 有权
公开(公告)号：US20060028686A1
公开(公告)日：2006-02-09
申请号：US10912034
申请日：2004-08-05
申请人： Ruth Bergman , Gitit Ruckenstein , Doron Shaked , Renato Keshet
发明人： Ruth Bergman , Gitit Ruckenstein , Doron Shaked , Renato Keshet
IPC分类号： G06K9/00
CPC分类号： H04N19/90 , H04N19/126 , H04N19/14 , H04N19/176 , H04N19/593
摘要： In one aspect, an image is quantized by assigning sub-ranges of pixel values in the image to respective quantization levels. The quantized image is encoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels. In another aspect, a code corresponding to an encoded image with pixel values quantized to respective quantization levels is received. The code is decoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels.

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