公开(公告)号：US07376266B2

公开(公告)日：2008-05-20

申请号：US11465087

申请日：2006-08-16

申请人： Patrice Y. Simard, III ,  Erin L. Renshaw ,  James Russell Rinker ,  Henrique Malvar

发明人： Patrice Y. Simard, III ,  Erin L. Renshaw ,  James Russell Rinker ,  Henrique Malvar

IPC分类号： G06K9/00 ,  G06K9/36

CPC分类号： H04N1/403 ,  G06K9/00456

摘要： Systems and methods for encoding and decoding document images are disclosed. Document images are segmented into multiple layers according to a mask. The multiple layers are non-binary. The respective layers can then be processed and compressed separately in order to achieve better compression of the document image overall. A mask is generated from a document image. The mask is generated so as to reduce an estimate of compression for the combined size of the mask and multiple layers of the document image. The mask is then employed to segment the document image into the multiple layers. The mask determines or allocates pixels of the document image into respective layers. The mask and the multiple layers are processed and encoded separately so as to improve compression of the document image overall and to improve the speed of so doing. The multiple layers are non-binary images and can, for example, comprise a foreground image and a background image.

摘要翻译： 公开了用于编码和解码文档图像的系统和方法。 根据掩码将文档图像分割成多个图层。 多层是非二进制的。 然后可以分别对各个层进行处理和压缩，以便对整个文件图像实现更好的压缩。 从文档图像生成蒙版。 生成掩模，以减少对于掩模和文档图像的多个层的组合大小的压缩估计。 然后使用掩模将文档图像分割成多个层。 掩模将文档图像的像素确定或分配到各个图层中。 掩模和多层被单独处理和编码，以便整体上改善文档图像的压缩并提高这样做的速度。 多层是非二进制图像，并且可以例如包括前景图像和背景图像。

公开(公告)号：US07764834B2

公开(公告)日：2010-07-27

申请号：US11465083

申请日：2006-08-16

申请人： Patrice Y. Simard, III ,  Erin L. Renshaw ,  James Russell Rinker

发明人： Patrice Y. Simard, III ,  Erin L. Renshaw ,  James Russell Rinker

IPC分类号： G06K9/00

CPC分类号： G06K9/38 ,  G06K2209/01

摘要： A system and method facilitating document image compression utilizing a mask separating a foreground of a document image from a background is provided. The invention includes a pixel energy analyzer adapted to partition regions into a foreground and background. The invention further provides for a merge region component adapted to attempt to merge regions if the merged region would not exceed a threshold energy. Merged regions are partitioned into a new foreground and new background. Thereafter, a mask storage component stores the partitioning information in a binary mask.

摘要翻译： 提供了利用从背景分离文档图像的前景的掩模来促进文档图像压缩的系统和方法。 本发明包括适于将区域分割成前景和背景的像素能量分析器。 本发明还提供了一种合并区域组件，其适于在合并区域不超过阈值能量时试图合并区域。 合并的区域被划分为新的前景和新的背景。 此后，掩模存储部件将分割信息存储在二进制掩码中。