| 发明名称 |
Method for reducing a binary image |
| 摘要 |
The method of the present invention reduces a binary digital image in size by a factor F by a method including the steps of: storing the image in bit sequence; removing one or more rows of bits along the vertical axis of the image to convert i rows of bits to j rows of bits where 0.5i</=j<i; modifying a line adjacent to each line discarded to preserve selected information from the discarded line; repeating the steps of removing and modifying a predetermined number of times to achieve a reduction by a factor F1 along the vertical axis; rotating the image in a first direction by ninety degrees; removing one or more rows of bits along the original horizontal axis of the image to convert i rows of bits to j rows of bits where 0.5i</=j<i; modifying a line adjacent to each line discarded to preserve selected information from the discarded line; repeating the steps of removing and modifying a predetermined number of times to achieve a reduction by a factor F2 along the original horizontal axis; rotating the image back to its original orientation; storing the reduced size image generated by the above steps.
|
| 申请公布号 |
US4656664(A) |
申请公布日期 |
1987.04.07 |
| 申请号 |
US19840664137 |
申请日期 |
1984.10.24 |
| 申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ANDERSON, KAREN L.;MINTZER, FREDERICK C. |
| 分类号 |
G06T3/40;H04N1/393;(IPC1-7):G06K9/42 |
主分类号 |
G06T3/40 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
