发明名称 |
EXTENDED DEPTH OF FIELD USING A MULTI-FOCAL LENGTH LENS WITH A CONTROLLED RANGE OF SPHERICAL ABERRATION AND CENTRALLY OBSCURED APERTURE |
摘要 |
An extended depth of field is achieved by a computational imaging system that combines a multifocal imaging subsystem for producing a purposefully blurred intermediate image with a digital processing subsystem for producing a recovered image having an extended depth of field. The multifocal imaging system preferably exhibits spherical aberration as the dominant feature of the purposeful blur. A central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image contains a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.
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申请公布号 |
WO2006028527(A3) |
申请公布日期 |
2007.01.18 |
申请号 |
WO2005US16231 |
申请日期 |
2005.05.11 |
申请人 |
AUTOMATIC RECOGNITION & CONTROL INC.;GEORGE, NICHOLAS;CHI, WANLI |
发明人 |
GEORGE, NICHOLAS;CHI, WANLI |
分类号 |
G02B13/18;G02B3/02;G02B3/10;G02B9/00;G02B9/08;G02B13/00;G02B27/10 |
主分类号 |
G02B13/18 |
代理机构 |
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地址 |
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