发明名称 |
MTF measuring method and system |
摘要 |
A method of measuring a modulation transfer function (MTF) includes detecting the center of a line spread function (LSF) image in order to calculate an MTF. For this purpose, an enlarged image of a portion of an image containing the LSF image is created, and binary-coded based on a threshold. A morphological operation is performed on the binary-coded image. Coordinates representing points that define the contour of the resultant image are sampled, and used to work out coordinates representing the center of a circle through Hough transform. The coordinates representing the center are transformed into coordinates representing a point in an original image.
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申请公布号 |
US2005100244(A1) |
申请公布日期 |
2005.05.12 |
申请号 |
US20040981916 |
申请日期 |
2004.11.04 |
申请人 |
WANG XUELI;YAN XIONGWEI;DING WEI;GOHNO MAKOTO |
发明人 |
WANG XUELI;YAN XIONGWEI;DING WEI;GOHNO MAKOTO |
分类号 |
A61B6/03;G01M11/00;G01M11/02;G06F17/00;G06K9/00;G06K9/36;G06T1/00;G06T7/00;G06T7/60;(IPC1-7):G06K9/00 |
主分类号 |
A61B6/03 |
代理机构 |
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地址 |
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