发明授权
US5369572A Radiographic image processing method wherein small variation of density
is selectively made clear
失效
选择性地清晰度小的密度变化的放射线图像处理方法
- 专利标题: Radiographic image processing method wherein small variation of density is selectively made clear
- 专利标题(中): 选择性地清晰度小的密度变化的放射线图像处理方法
-
申请号: US856138申请日: 1992-03-20
-
公开(公告)号: US5369572A公开(公告)日: 1994-11-29
- 发明人: Takahiro Haraki , Shiro Takeda , Fumihiro Namiki , Hideyuki Hirano , Kenji Ishiwata
- 申请人: Takahiro Haraki , Shiro Takeda , Fumihiro Namiki , Hideyuki Hirano , Kenji Ishiwata
- 申请人地址: JPX Kawasaki
- 专利权人: Fujitsu Limited
- 当前专利权人: Fujitsu Limited
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX3-057409 19910320; JPX4-048825 19920305
- 主分类号: G06T5/20
- IPC分类号: G06T5/20 ; G06F15/68
摘要:
A method for processing a radiographic image, containing: a step for calculating an average S.sub.m of original image data of an averaging area around each pixel of the radiographic image; and a step for transforming the original image data S of each pixel of the radiographic image to obtain a processed image data Q of each pixel in accordance with an equation, Q=S+.function.(S-S.sub.m), where .function.(S-S.sub.m) has a characteristic in at least one of first and second ranges of the difference S-S.sub.m, the difference S-S.sub.m is positive in the first range and negative in the second range, and according to the above characteristic, the absolute value .vertline.Q-S.vertline. varies in accordance with an increasing monotonic function of the absolute value .vertline.S-S.sub.m .vertline. when the absolute value .vertline.S-S.sub.m .vertline. is less than a predetermined value, and the absolute value .vertline.Q-S.vertline. varies in accordance with a decreasing monotonic function of the absolute value .vertline.S-S.sub.m .vertline. when the absolute value .vertline.S-S.sub.m .vertline. of the difference S-S.sub.m is more than the predetermined value. The above function .function.(S-S.sub.m) may be a non-odd function of the difference S-S.sub.m.
公开/授权文献
- US6118383A Multi-function light sensor for vehicle 公开/授权日:2000-09-12