发明名称 |
System and method for correction of vignetting effect in multi-camera flat panel x-ray detectors |
摘要 |
A system and method for correcting vignetting distortion in an imaging sensor of a multi-camera flat panel X-Ray detector. A scintillator converts X-Ray radiation generated by an X-Ray source into detectable radiation. A displacement unit generates, during a calibration phase, relative displacement between the X-Ray detector and an X-Ray source at a plane parallel to the scintillator. The imaging sensor acquires, during the calibration phase, a first and a second partial images, the first partial image is acquired before the relative displacement is generated, and the second partial image is acquired after the relative displacement is generated. A relative displacement measurement unit measures the relative displacement. Coefficients of a preliminary inverse vignetting function are calculated based on differences between corresponding pixels of the two partial images. |
申请公布号 |
US9360571(B2) |
申请公布日期 |
2016.06.07 |
申请号 |
US201214113590 |
申请日期 |
2012.04.24 |
申请人 |
GENERIC IMAGING LTD. |
发明人 |
Batkilin Eduard;Karelin Irina;Feldman Alex |
分类号 |
G01T7/00;G01T1/20 |
主分类号 |
G01T7/00 |
代理机构 |
Pearl Cohen Zedek Latzer Baratz LLP |
代理人 |
Pearl Cohen Zedek Latzer Baratz LLP |
主权项 |
1. A method for correcting vignetting distortion in an optical module comprising imaging sensor and at least one lens, of a multi-camera flat panel X-Ray detector, the method comprising:
taking a first partial X-Ray image by the imaging sensor; creating relative displacement between the X-Ray detector and an X-Ray source at a plane parallel to a plane of a scintillator of the detector; taking a second partial X-Ray image by the imaging sensor; obtaining the relative displacement between the first partial X-Ray image and the second partial X-Ray image; and calculating coefficients of a preliminary inverse vignetting function based on differences between corresponding pixels of the two partial images. |
地址 |
Nesher IL |