公开(公告)号：US08558182B2

公开(公告)日：2013-10-15

申请号：US12898060

申请日：2010-10-05

申请人： Wanli Chi ,  Nicholas George

发明人： Wanli Chi ,  Nicholas George

IPC分类号： G02F1/35

CPC分类号： H04N5/2254 ,  G02F2203/01 ,  G02F2203/02 ,  G02F2203/12 ,  G02F2203/50 ,  G02F2203/69 ,  G03H1/041 ,  G03H2001/0447 ,  G03H2223/13 ,  G03H2223/23

摘要： A novel phase-coded aperture, associated imaging system, and design method is disclosed. The optical imaging system includes a coded-aperture followed optically by a detector array and includes an image processor. A diffraction pattern in the form of a band-limited uniformly redundant array is formed on the detector array when focusable radiation from a point source in object space is modulation by the transmission function of the coded-aperture. Since diffraction effects cannot be ignored in the optical regime, an iterative phase retrieval method is used to calculate the phase-coded aperture transmission function. Correlation type processing can be applied for the image recovery.

摘要翻译： 公开了一种新颖的相位编码孔径，相关成像系统和设计方法。 该光学成像系统包括经检测器阵列光学后接的编码孔径，并包括图像处理器。 当通过编码孔径的传输函数调制来自对象空间中的点源的可聚焦辐射时，在检测器阵列上形成带限均匀冗余阵列形式的衍射图案。 由于衍射效应在光学状态下不能被忽略，所以使用迭代相位检索方法来计算相位编码孔径传播函数。 相关类型处理可以应用于图像恢复。

公开(公告)号：US07593161B2

公开(公告)日：2009-09-22

申请号：US11963033

申请日：2007-12-21

申请人： Nicholas George ,  Wanli Chi

发明人： Nicholas George ,  Wanli Chi

IPC分类号： G02B27/14

CPC分类号： G02B27/0075 ,  G06T5/50 ,  H04N5/23229

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.

摘要翻译： 通过计算成像系统实现扩展景深，该计算成像系统组合多焦点成像子系统，用于产生有目的地模糊的中间图像与数字处理子系统，用于产生具有扩展景深的恢复图像。 多焦点成像系统优选地将球面像差作为目标模糊的主要特征。 多焦点成像子系统的中心遮蔽使得对象点的点扩散函数在对象距离的范围内更均匀。 用于将中间图像转换成恢复图像的迭代数字去卷积算法包含加速收敛，避免停滞并提高图像质量的度量参数。

公开(公告)号：US07511895B2

公开(公告)日：2009-03-31

申请号：US11956553

申请日：2007-12-14

申请人： Nicholas George ,  Wanli Chi

发明人： Nicholas George ,  Wanli Chi

IPC分类号： G02B13/00 ,  G02B3/00 ,  G02B13/18 ,  G02B3/02

CPC分类号： G02B27/0075 ,  G06T5/50 ,  H04N5/23229

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 exhibits spherical aberration as the dominant feature of the purposeful blur. In an aspect, a central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances, however, the system may not include a centrally obscured aperture to achieve intended results. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image based on maximum entropy involves a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.

摘要翻译： 通过计算成像系统实现扩展景深，该计算成像系统组合多焦点成像子系统，用于产生有目的地模糊的中间图像与数字处理子系统，用于产生具有扩展景深的恢复图像。 多焦点成像系统将球面像差作为目标模糊的主要特征。 在一个方面，多焦点成像子系统的中心遮蔽使得对象点的点扩散函数在对象距离的范围上更均匀，然而，该系统可能不包括用于实现预期结果的中心模糊孔径。 用于基于最大熵将中间图像转换成恢复图像的迭代数字去卷积算法涉及加速收敛，避免停滞并提高图像质量的度量参数。

公开(公告)号：US20080089598A1

公开(公告)日：2008-04-17

申请号：US11956553

申请日：2007-12-14

申请人： Nicholas George ,  Wanli Chi

发明人： Nicholas George ,  Wanli Chi

IPC分类号： G06K9/40

CPC分类号： G02B27/0075 ,  G06T5/50 ,  H04N5/23229

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 exhibits spherical aberration as the dominant feature of the purposeful blur. In an aspect, a central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances, however, the system may not include a centrally obscured aperture to achieve intended results. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image based on maximum entropy involves a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.

摘要翻译： 通过计算成像系统实现扩展景深，该计算成像系统组合多焦点成像子系统，用于产生有目的地模糊的中间图像与数字处理子系统，用于产生具有扩展景深的恢复图像。 多焦点成像系统将球面像差作为目标模糊的主要特征。 在一个方面，多焦点成像子系统的中心遮蔽使得对象点的点扩散函数在对象距离的范围上更均匀，然而，该系统可能不包括用于实现预期结果的中心模糊孔径。 用于基于最大熵将中间图像转换成恢复图像的迭代数字去卷积算法涉及加速收敛，避免停滞并提高图像质量的度量参数。