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公开(公告)号：US06215306B1
公开(公告)日：2001-04-10
申请号：US09312029
申请日：1999-05-14
申请人： Chi-Ming Tsai , Lai-Chee Man
发明人： Chi-Ming Tsai , Lai-Chee Man
IPC分类号： G01V300
CPC分类号： G01R33/4833
摘要： The quality of spiral images depends on whether actual k-space sampling points are at their nominal positions. Although newer gradient systems can provide more accurate gradient waveforms, timing mis-registration between data acquisition and gradient systems can significantly distort the positions of samples. Even after the timing of data acquisition is tuned, minor residual errors can still cause shading artifacts which are problematic for quantitative MRI applications, such as the phase-contrast method. Although ideally measuring the actual k-space trajectory can correct for the timing errors, it requires additional data acquisition and scan time. The present invention employs off-centered spiral trajectories which are more robust against timing errors and applies them to the phase-contrast method. The new trajectories turn shading artifacts into a slowly-varying linear phase in reconstructed images without affecting the magnitude of images.
摘要翻译： 螺旋图像的质量取决于实际的k空间采样点是否在其标称位置。 虽然较新的梯度系统可以提供更准确的梯度波形，但是数据采集和梯度系统之间的定时误配可能会使样本的位置发生显着变形。 即使在调整数据采集的时序之后，较小的残留误差仍然可能导致对于定量MRI应用（如相位对比法）有问题的阴影伪像。 虽然理想地测量实际的k空间轨迹可以校正定时误差，但它需要额外的数据采集和扫描时间。 本发明采用偏心的螺旋轨迹，其对于定时误差更加鲁棒，并将它们应用于相位对比方法。 新的轨迹将重影图像中的阴影伪像变成缓慢变化的线性相位，而不影响图像的幅度。
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公开(公告)号：US08014036B2
公开(公告)日：2011-09-06
申请号：US12964461
申请日：2010-12-09
申请人： Lai Chee Man
发明人： Lai Chee Man
IPC分类号： H04N1/405
CPC分类号： G06T1/0028 , B41M3/10 , B41M3/146 , G06T2201/0051 , H04N1/00883 , H04N1/32203 , H04N1/32219 , H04N1/32261 , H04N2201/0082
摘要： A form of stochastic random distribution is used to print an invisible watermark using a typical, e.g., 600 dpi, printer. The watermark contains such information as “Do Not Copy,” or other such information. Although the watermark is not visible on a first generation version of a document that is printed, various techniques are used to print the watermark in such a way that it becomes readily apparent when the first generation document is photocopied. The preferred embodiment of the invention is concerned with a technique for improving such techniques, for example so that gray levels are improved to address variations from printer to printer. Another preferred embodiment of the invention is also concerned with a technique for performing error diffusion watermarking without the need for performing a calibration step.
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公开(公告)号：US20110085209A1
公开(公告)日：2011-04-14
申请号：US12964461
申请日：2010-12-09
申请人： Lai Chee MAN
发明人： Lai Chee MAN
IPC分类号： G06K15/02
CPC分类号： G06T1/0028 , B41M3/10 , B41M3/146 , G06T2201/0051 , H04N1/00883 , H04N1/32203 , H04N1/32219 , H04N1/32261 , H04N2201/0082
摘要： A form of stochastic random distribution is used to print an invisible watermark using a typical, e.g., 600 dpi, printer. The watermark contains such information as “Do Not Copy,” or other such information. Although the watermark is not visible on a first generation version of a document that is printed, various techniques are used to print the watermark in such a way that it becomes readily apparent when the first generation document is photocopied. The preferred embodiment of the invention is concerned with a technique for improving such techniques, for example so that gray levels are improved to address variations from printer to printer. Another preferred embodiment of the invention is also concerned with a technique for performing error diffusion watermarking without the need for performing a calibration step.
摘要翻译： 使用随机随机分布的形式使用典型的例如600dpi的打印机打印不可见水印。 水印包含“不要复制”等信息。 虽然在打印的文档的第一代版本上不可见水印，但是使用各种技术来打印水印，使得当第一代文档被复印时变得显而易见。 本发明的优选实施例涉及用于改进这种技术的技术，例如使得灰度级得到改善以解决从打印机到打印机的变化。 本发明的另一优选实施例还涉及用于执行误差扩散水印的技术，而不需要执行校准步骤。
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公开(公告)号：US07880934B2
公开(公告)日：2011-02-01
申请号：US11952084
申请日：2007-12-06
申请人： Lai Chee Man
发明人： Lai Chee Man
IPC分类号： H04N1/405
CPC分类号： G06T1/0028 , B41M3/10 , B41M3/146 , G06T2201/0051 , H04N1/00883 , H04N1/32203 , H04N1/32219 , H04N1/32261 , H04N2201/0082
摘要： A form of stochastic random distribution is used to print an invisible watermark using a typical, e.g., 600 dpi, printer. The watermark contains such information as “Do Not Copy,” or other such information. Although the watermark is not visible on a first generation version of a document that is printed, various techniques are used to print the watermark in such a way that it becomes readily apparent when the first generation document is photocopied. The preferred embodiment of the invention is concerned with a technique for improving such techniques, for example so that gray levels are improved to address variations from printer to printer. Another preferred embodiment of the invention is also concerned with a technique for performing error diffusion watermarking without the need for performing a calibration step.
摘要翻译： 使用随机随机分布的形式使用典型的例如600dpi的打印机打印不可见水印。 水印包含“不要复制”等信息。 虽然在打印的文档的第一代版本上不可见水印，但是使用各种技术来打印水印，使得当第一代文档被复印时变得显而易见。 本发明的优选实施例涉及用于改进这种技术的技术，例如使得灰度级得到改善以解决从打印机到打印机的变化。 本发明的另一优选实施例还涉及用于执行误差扩散水印的技术，而不需要执行校准步骤。
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5.发明授权公开(公告)号：US07653890B2
公开(公告)日：2010-01-26
申请号：US11096469
申请日：2005-04-01
申请人： Chi-Ming Tsai , Lai-Chee Man , Yao-Ting Wang , Fang-Cheng Chang
发明人： Chi-Ming Tsai , Lai-Chee Man , Yao-Ting Wang , Fang-Cheng Chang
CPC分类号： G03F1/36
摘要： A Wafer Image Modeling and Prediction System (“WIMAPS”) is described that includes systems and methods that generate and/or apply models of resolution enhancement techniques (“RET”) and printing processes in integrated circuit (“IC”) fabrication. The WIMAPS provides efficient processes for use by designers in predicting the RET and wafer printing process so as to allow designers to filter predict printed silicon contours prior to application of RET and printing processes to the circuit design.
摘要翻译： 描述了一种晶片图像建模和预测系统（“WIMAPS”），其包括在集成电路（“IC”）制造中生成和/或应用分辨率增强技术（“RET”）和印刷过程的模型的系统和方法。 WIMAPS提供了设计人员在预测RET和晶片印刷过程中使用的有效过程，以便设计人员可以在将RET和印刷工艺应用于电路设计之前过滤预测印刷硅轮廓。
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公开(公告)号：US07636180B2
公开(公告)日：2009-12-22
申请号：US11113540
申请日：2005-04-25
申请人： Ron J. Karidi , Lai Chee Man
发明人： Ron J. Karidi , Lai Chee Man
IPC分类号： H04N1/407
CPC分类号： G06T5/005 , G06K9/44 , G06K2209/01 , G06T5/002 , G06T5/20 , G06T7/12 , G06T2207/10008 , G06T2207/30176
摘要： Methods and apparatus are provided to smooth a jagged outline of a reconstructed text generated through any of a variety of systems, such as, for example, an image scanner. Given the reconstructed text with a jagged outline, the methods smooth the outline of the text first through location of horizontal and vertical edges, and subsequent gray scale reconstruction of the edge ink level from a one-bit or a low number of bits edge pattern. The methods then provide identification of the local text outline pattern and corresponding ink level adjustment of the center pixel. The methods produce text having very smooth horizontal and vertical edges. The methods then smooth slanted edges, mend holes in the text, and remove isolated pixels of ink.
摘要翻译： 提供了方法和装置来平滑通过诸如例如图像扫描器的各种系统中的任何一个产生的重建文本的锯齿形轮廓。 给定具有锯齿状轮廓的重建文本，该方法首先通过水平和垂直边缘的位置平滑文本的轮廓，以及从一位或低位数边缘图案的边缘墨水水平的后续灰度重建。 然后，该方法提供本地文本轮廓图案的识别和中心像素的对应墨水量调节。 该方法产生具有非常平滑的水平和垂直边缘的文本。 然后，方法可以平滑倾斜的边缘，修补文本中的孔，并清除墨水的孤立像素。
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7.发明授权公开(公告)号：US07248752B2
公开(公告)日：2007-07-24
申请号：US10650279
申请日：2003-08-27
申请人： Lai Chee Man
发明人： Lai Chee Man
CPC分类号： G06T3/403 , H04N1/40068
摘要： Methods and apparatus are provided for converting binary image data at a first resolution to binary image data at a second resolution, the methods including detecting the edges of the binary image data, sampling a corresponding point on or substantially near each of the edges, fitting a curve between the sampled points, and re-sampling the curve at the second resolution.
摘要翻译： 提供了用于以第二分辨率将二进制图像数据以第一分辨率转换为二进制图像数据的方法和装置，所述方法包括检测二进制图像数据的边缘，对每个边缘上或基本上靠近每个边缘进行对应点的拟合 采样点之间的曲线，并在第二分辨率下重新采样曲线。
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公开(公告)号：US07177472B2
公开(公告)日：2007-02-13
申请号：US10887940
申请日：2004-07-09
申请人： Ron J. Karidi , Lai Chee Man
发明人： Ron J. Karidi , Lai Chee Man
IPC分类号： G06K9/34
CPC分类号： G06K9/00456
摘要： A text detection technique comprises local ramp detection, identification of intensity troughs (candidate text strokes), determination of stroke width, preliminary detection of text based on contrast and stroke width, and a consistency check.
摘要翻译： 文本检测技术包括局部斜坡检测，强度波谷识别（候选文本笔画），笔画宽度的确定，基于对比度和笔画宽度的文本的初步检测以及一致性检查。
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9.发明申请公开(公告)号：US20050268256A1
公开(公告)日：2005-12-01
申请号：US11096469
申请日：2005-04-01
申请人： Chi-Ming Tsai , Lai-Chee Man , Yao-Ting Wang , Fang-Cheng Chang
发明人： Chi-Ming Tsai , Lai-Chee Man , Yao-Ting Wang , Fang-Cheng Chang
CPC分类号： G03F1/36
摘要： A Wafer Image Modeling and Prediction System (“WIMAPS”) is described that includes systems and methods that generate and/or apply models of resolution enhancement techniques (“RET”) and printing processes in integrated circuit (“IC”) fabrication. The WIMAPS provides efficient processes for use by designers in predicting the RET and wafer printing process so as to allow designers to filter predict printed silicon contours prior to application of RET and printing processes to the circuit design
摘要翻译： 描述了一种晶片图像建模和预测系统（“WIMAPS”），其包括在集成电路（“IC”）制造中生成和/或应用分辨率增强技术（“RET”）和印刷过程的模型的系统和方法。 WIMAPS提供了设计人员在预测RET和晶片印刷过程中使用的有效过程，以便设计人员可以在将RET和印刷工艺应用于电路设计之前过滤预测印刷硅轮廓
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公开(公告)号：US06885477B2
公开(公告)日：2005-04-26
申请号：US10317470
申请日：2002-12-11
申请人： Ron J. Karidi , Lai Chee Man
发明人： Ron J. Karidi , Lai Chee Man
CPC分类号： G06T5/005 , G06K9/44 , G06K2209/01 , G06T5/002 , G06T5/20 , G06T7/12 , G06T2207/10008 , G06T2207/30176
摘要： Methods and apparatus are provided to smooth a jagged outline of a reconstructed text generated through any of a variety of systems, such as, for example, an image scanner. Given the reconstructed text with a jagged outline, the methods smooth the outline of the text first through location of horizontal and vertical edges, and subsequent gray scale reconstruction of the edge ink level from a one-bit or a low number of bits edge pattern. The methods then provide identification of the local text outline pattern and corresponding ink level adjustment of the center pixel. The methods produce text having very smooth horizontal and vertical edges. The methods then smooth slanted edges, mend holes in the text, and remove isolated pixels of ink.
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