发明授权
- 专利标题: Image compression and restoring method for binary images
- 专利标题(中): 二进制图像的图像压缩和恢复方法
-
申请号: US10143069申请日: 2002-05-10
-
公开(公告)号: US06944347B2公开(公告)日: 2005-09-13
- 发明人: Chul Soo Lee , Hyun Wook Park
- 申请人: Chul Soo Lee , Hyun Wook Park
- 申请人地址: KR Daejon
- 专利权人: Korea Advanced Institute of Science and Technology
- 当前专利权人: Korea Advanced Institute of Science and Technology
- 当前专利权人地址: KR Daejon
- 代理机构: Harness, Dickey & Pierce, P.L.C.
- 主分类号: H04N1/415
- IPC分类号: H04N1/415 ; G06K9/36 ; G06K9/46 ; G06T5/00 ; G06T9/00 ; H03M7/40 ; H04N1/41
摘要:
The present invention relates to the image compression and restoring method for binary images that can be used in binary image equipment including printers.In the present invention, an image is not compressed by each pixel but by cell that combines four pixels. And each cell is compressed in two steps. In the first step, the number of black pixels contained in the cell is compressed. And in the second step, using the number of pixels the information compressed in the previous step, the exact location of pixels that constitute the cell is compressed. By doing this, the compression rate can be increased. And even when the compressed bit rows are restored in the first step, image restoration is available with just a small degradation.
公开/授权文献
- US20030210823A1 Image compression and restoring method for binary images 公开/授权日:2003-11-13
信息查询