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    • 5. 发明申请
    • Ultra light weight browser
    • 超轻重量浏览器
    • US20060056686A1
    • 2006-03-16
    • US10542666
    • 2004-03-16
    • Norbert GotzHermann Stamm-Wilbrandt
    • Norbert GotzHermann Stamm-Wilbrandt
    • G06K9/00G06K9/36
    • G06F17/30899H04N1/64
    • The present invention relates to the field of computer technology, and in particular to a method and system for compressing digital data from a row-column structured, multi-color bitmap image representation and to advantageous applications thereof for low bandwidth data communication. In order to increase the compression rate in particular of bitmaps corresponding to screen shots in web-based applications or standard desktop applications having a graphical user interface (GUI) it is proposed to reduce (210) the image representation in order to contain only a subset of colors, preferably 2, 4, 8, 16 . . . 256, before subjecting it to further compression steps (215, 260, 265) and comprising rowwise X-OR operations (215) and subsequent compressed mapping (240, 245) of the resulting pixel information into a respective compressed bit string. X-OR operations in column direction (220) are also added in order to improve the compression rate for the specific field of above said low bandwidth communications.
    • 本发明涉及计算机技术领域,特别涉及一种用于从行列结构化的多色位图图像表示压缩数字数据的方法和系统,以及用于低带宽数据通信的有利应用。 为了增加特定于对应于具有图形用户界面(GUI)的基于web的应用程序或标准桌面应用程序中的屏幕截图的位图的压缩率,建议减少(210)图像表示,以便仅包含子集 的颜色,优选为2,4,8,16。 。 。 256,然后对其进行进一步的压缩步骤(215,260,265),并且将所得到的像素信息的横向X-OR运算(215)和随后的压缩映射(240,245)分解成相应的压缩位串。 还添加列方向(220)的X-OR运算,以便提高上述低带宽通信以上特定领域的压缩率。