公开(公告)号：US20020081027A1

公开(公告)日：2002-06-27

申请号：US09747079

申请日：2000-12-21

Applicant: MOTOROLA, INC.

Inventor： Manjirnath Chatterjee ,  Gregory R. Simon

IPC: G06K009/34

CPC classification number: H04L69/06 ,  G06F17/242 ,  H04L51/00

Abstract: A method and computer program product for transporting digital images across electronic media. A digital image 122, e.g., a signature, a handwritten note, a paint program file or anime, captured in a digital ink file 124 is converted or compressed 126 into a string 128 of binary bits. The bit string 128 is mapped 130 into displayable characters such as ASCII characters. The displayable characters are embedded 132 into a message, such as being included in the text of an e-mail message and the message is transmitted electronically. When the message is received 142, the embedded displayable characters are stripped 144 from it. The displayable characters are mapped 146 to their binary equivalents and the mapped binary data stream 148 is reconverted or decompressed 150 to recover the digital ink file 124. The original digital ink image 153 is displayed from the digital ink file 124.

Abstract translation: 一种用于通过电子媒体传输数字图像的方法和计算机程序产品。 在数字墨水文件124中捕获的数字图像122（例如，签名，手写笔记，绘画程序文件或动画）被转换或压缩126为二进制位的串128。 位串128被映射到可显示的字符，例如ASCII字符。 可显示的字符被嵌入到消息中，例如被包括在电子邮件消息的文本中，并且该消息是以电子方式传送的。 当接收到消息142时，嵌入的可显示字符被从其剥离144。 可显示字符被映射146到它们的二进制等价物，并且映射的二进制数据流148被重新转换或解压缩150以恢复数字墨水文件124.原始数字墨水图像153从数字墨水文件124显示。

公开(公告)号：US20020110281A1

公开(公告)日：2002-08-15

申请号：US09741992

申请日：2000-12-20

Applicant: MOTOROLA, INC.

Inventor： Manjirnath Chatterjee

IPC: G06K009/36 ,  G06K009/46

CPC classification number: G06K9/222 ,  H04L69/04

Abstract: Compression of digital ink is achieved by calculating second order differences between consecutive elements in the digital ink and applying the differences to a Huffman encoder to produce a compressed bitstream. For digital ink that is not highly correlated, compression may be achieved by representing segments of the digital ink by mathematical shapes such as a Bezier curve or orthogonal elements and transmitting the shape instead of the digital ink.

Abstract translation: 数字墨水的压缩是通过计算数字墨水中的连续元素之间的二阶差异并将差值应用于霍夫曼编码器来产生压缩比特流来实现的。 对于不是高度相关的数字墨水，可以通过用诸如贝塞尔曲线或正交元素之类的数学形状表示数字墨水的片段并且传送形状而不是数字墨水来实现压缩。