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1. 发明授权

US07057615B2 Method and system for representing and displaying digital ink 有权
公开(公告)号：US07057615B2
公开(公告)日：2006-06-06
申请号：US09894824
申请日：2001-06-28
申请人： Jian Wang , Liyong Chen , Yu Zou , Siwei Lyu
发明人： Jian Wang , Liyong Chen , Yu Zou , Siwei Lyu
IPC分类号： G09G5/00 , G06T11/20
CPC分类号： G06T11/203 , G06K9/222
摘要： A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.

2. 发明授权

US07450125B2 Method and system for representing and displaying digital ink 有权
标题翻译：用于表示和显示数字墨水的方法和系统
公开(公告)号：US07450125B2
公开(公告)日：2008-11-11
申请号：US11446491
申请日：2006-06-01
申请人： Jian Wang , Yu Zou , Liyong Chen , Siwei Lyu
发明人： Jian Wang , Yu Zou , Liyong Chen , Siwei Lyu
IPC分类号： G06T11/20
CPC分类号： G06T11/203 , G06K9/222
摘要： A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.
摘要翻译：一种用于压缩和显示数字墨迹的方法和系统。原始油墨数据平滑，找到平滑线的尖点。然后使用曲线拟合来生成定义相邻尖点之间的线段的数学表达式。然后，油墨迹线由包括尖锐点和线段的数学表达式的主干样条表示。将厚度信息（例如压力或加速度信息）与骨架花键组合，以提供表示原始油墨迹线的轮廓曲线的压缩油墨文件。显示模块使用算法将轮廓曲线分成直线序列。然后使用新颖的抗锯齿方法生成一组像素用于每条直线的显示。使用加权算法将相邻直线的末端处的像素对准。

3. 发明授权

US07298903B2 Method and system for separating text and drawings in digital ink 有权
标题翻译：数字墨水分离文字和图纸的方法和系统
公开(公告)号：US07298903B2
公开(公告)日：2007-11-20
申请号：US09895429
申请日：2001-06-28
申请人： Jian Wang , Haibin Ling , Siwei Lyu , Yu Zou
发明人： Jian Wang , Haibin Ling , Siwei Lyu , Yu Zou
IPC分类号： G06K9/18 , G06K9/00
CPC分类号： G06K9/00456
摘要： A system for separating text and drawings in a digital ink file (e.g., a handwritten digital ink file). A stroke analyzer classifies single strokes that have been input by a user as “text” or “unknown.” The stroke analyzer utilizes a trainable classifier, such as a support vector machine. A grouping component is provided that groups text strokes in an attempt to form text objects (e.g., words, characters, or letters). The grouping component also groups unknown strokes in an attempt to form objects (e.g., shapes, drawings, or even text). A trainable classifier, such as a support vector machine, evaluates the grouped strokes to determine if they are objects.
摘要翻译：用于分离数字墨水文件（例如，手写数字墨水文件）中的文本和图纸的系统。笔划分析器将用户输入的单笔划分为“文字”或“未知”。笔划分析仪使用可分类的分类器，例如支持向量机。提供了分组组件，其组合文本笔画以试图形成文本对象（例如，单词，字符或字母）。分组组件还组合未知笔画以试图形成对象（例如，形状，图形，甚至文本）。可训练的分类器，例如支持向量机，评估分组的笔画以确定它们是否是对象。

4. 发明申请

US20060290698A1 Method and system for representing and displaying digital ink 有权
公开(公告)号：US20060290698A1
公开(公告)日：2006-12-28
申请号：US11446491
申请日：2006-06-01
申请人： Jian Wang , Liyong Chen , Yu Zou , Siwei Lyu
发明人： Jian Wang , Liyong Chen , Yu Zou , Siwei Lyu
IPC分类号： G06T11/20
CPC分类号： G06T11/203 , G06K9/222
摘要： A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.

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