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。

公开(公告)号：US07554750B2

公开(公告)日：2009-06-30

申请号：US11154121

申请日：2005-06-16

申请人： Nicholas George ,  Wanli Chi

发明人： Nicholas George ,  Wanli Chi

IPC分类号： G02B13/18 ,  G02B3/02 ,  G02B3/10

CPC分类号： G02B27/0075 ,  G02B3/04 ,  G02B3/10 ,  G02B13/18 ,  H04N5/2254 ,  H04N5/23229

摘要： A system for imaging with a circularly symmetric multifocal aspheric lens is provided for obtaining an extended depth of field. The system includes a camera for capturing an image of at least one object through a circularly symmetric multifocal aspheric lens to provide a blurred image, and a computer system for processing the captured blurred image to provide a recovered image of the object having an extended depth of field. The recovered image may be outputted to a display or other peripheral device. Processing of the blurred image utilizes one of inverse filtering, convolution matrix (e.g., edge sharpening matrix), or maximum entropy. The computer system performing image processing may be in the camera or represent a computer system external to the camera which receives the blurred image. The extended depth of field is characterized by the object being in focus over a range of distances in the recovered image.

摘要翻译： 提供了一种用圆形对称多焦点非球面透镜成像的系统，用于获得扩展的景深。 该系统包括用于通过圆形对称多焦点非球面透镜捕获至少一个物体的图像以提供模糊图像的相机，以及用于处理所捕获的模糊图像以提供具有扩展深度的对象的恢复图像的计算机系统 领域。 恢复的图像可以被输出到显示器或其他外围设备。 模糊图像的处理利用逆滤波，卷积矩阵（例如边缘锐化矩阵）或最大熵之一。 执行图像处理的计算机系统可以在相机中或者表示接收模糊图像的相机外部的计算机系统。 扩展景深的特征在于物体在恢复的图像中的距离范围内聚焦。

公开(公告)号：US07336430B2

公开(公告)日：2008-02-26

申请号：US10908287

申请日：2005-05-05

申请人： Nicholas George ,  Wanli Chi

发明人： Nicholas George ,  Wanli Chi

IPC分类号： G02B13/18 ,  G02B3/02 ,  G02B27/10

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：US20140009731A1

公开(公告)日：2014-01-09

申请号：US13544476

申请日：2012-07-09

申请人： Michael O'Callaghan ,  Wanli Chi ,  Mark Handschy

发明人： Michael O'Callaghan ,  Wanli Chi ,  Mark Handschy

IPC分类号： G02F1/1335 ,  G02F1/1343

CPC分类号： G02F1/136277 ,  G02F1/133553 ,  G02F2201/40

摘要： A liquid crystal panel and method are disclosed for increasing optical efficiency in the panel by using a reflector with a high fill factor and arranging an array of transparent pixel electrodes between the reflector and a layer of liquid crystal.

摘要翻译： 公开了一种通过使用具有高填充因子的反射器来提高面板中的光学效率的液晶面板和方法，并且在反射器和液晶层之间布置透明像素电极阵列。