发明名称 |
METHOD AND SYSTEM FOR ESTIMATING POINT SPREAD FUNCTION |
摘要 |
The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function. |
申请公布号 |
US2017024862(A1) |
申请公布日期 |
2017.01.26 |
申请号 |
US201615217613 |
申请日期 |
2016.07.22 |
申请人 |
Tsinghua University ;Nuctech Company Limited |
发明人 |
KANG Kejun;CHEN Zhiqiang;LI Yuanjing;ZHANG Li;ZHAO Ziran;LIU Yaohong;GU Jianping;WANG Zhiming |
分类号 |
G06T5/00;G06T7/40;G06T7/00 |
主分类号 |
G06T5/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for estimating a point spread function, the method comprising:
capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function. |
地址 |
Beijing CN |