公开(公告)号：EP2366123A1

公开(公告)日：2011-09-21

申请号：EP09797134.5

申请日：2009-11-27

申请人： QinetiQ Limited

发明人： RIDLEY, Kevin, Dennis ,  DE VILLIERS, Geoffrey, Derek ,  SINGER, Christopher, Williams ,  STRENS, Malcolm, John, Alexander

IPC分类号： G02B27/00 ,  A61B6/02 ,  G01T1/29 ,  G21K1/02

CPC分类号： G02B27/00 ,  G01J3/2846 ,  G01J4/04 ,  G02B2207/129 ,  G06K9/209 ,  H04N5/335 ,  H04N9/045 ,  H04N9/07

摘要： Optically diverse coded aperture imaging (CAI) comprises imaging a scene which is multi-spectrally diverse or polarimetrically diverse. A CAI system (10) allows light rays (12) from a scene to pass to a detector array (14) through a coded aperture mask (16) within an optical stop (18). The mask 16 has multiple apertures 16a, and produces overlapping coded images of the scene on the detector array (14). Detector array pixels receive and sum intensity contributions from each coded image. The detector array (14) provides output data for processing to reconstruct an image. The mask (16) provides for multi- spectral information to become encoded in the data. A linear integral equation incorporating explicit wavelength dependence relates the imaged scene to the data. This equation is solved by Landweber iteration to derive a multi-spectral image. An image with multiple polarisation states (polarimetric diversity) may be derived similarly with a linear integral equation incorporating explicit polarisation dependence.

摘要翻译： 光学多样化编码孔径成像（CAI）包括对多光谱多样化或极化多样化的场景进行成像。 CAI系统（10）允许来自场景的光线（12）通过光阑（18）内的编码孔径掩模（16）传递到检测器阵列（14）。 掩模16具有多个孔16a，并且在检测器阵列（14）上产生场景的重叠编码图像。 检测器阵列像素接收来自每个编码图像的强度贡献并求和。 检测器阵列（14）提供用于处理的输出数据以重建图像。 掩模（16）提供多谱信息以在数据中编码。 包含明确波长依赖性的线性积分方程将成像场景与数据相关联。 通过Landweber迭代求解该方程以导出多光谱图像。 具有多种偏振态（极化分集）的图像可以与包含明确偏振相关性的线性积分方程类似地导出。

公开(公告)号：EP1982215A1

公开(公告)日：2008-10-22

申请号：EP07705138.1

申请日：2007-02-06

申请人： QinetiQ Limited

发明人： SLINGER, Christopher, William ,  DE VILLIERS, Geoffrey, Derek ,  PAYNE, Douglas, Alan

IPC分类号： G01T1/29

CPC分类号： G01T1/295 ,  G02B2207/129

摘要： The present invention relates to processing of coded aperture images. Multiple frames of data acquired by the coded aperture imaging system, each with a different coded aperture array, are processed to form an image. The processing incorporates the constraints that the image solution must be positive and that the solution should be zero outside an expected image region. In one embodiment image enhancement may involve dividing the processed image into image regions having a spatially invariant point spread function and solving an inverse problem for each image region to reduce image blurring.

公开(公告)号：EP2324456A1

公开(公告)日：2011-05-25

申请号：EP09784819.6

申请日：2009-07-30

申请人： QinetiQ Limited

发明人： DE VILLIERS, Geoffrey, Derek ,  RIDLEY, Kevin, Dennis ,  SLINGER, Christopher, William ,  STRENS, Malcolm, John, Alexander

IPC分类号： G06T3/40 ,  G06T5/50 ,  G01T1/29

CPC分类号： G06T3/4053 ,  G06T5/50 ,  G06T2200/21 ,  G06T2207/10052

摘要： A method of reconstructing an image of a scene (4) from data output by a detector (8) in a coded aperture imaging system (2) comprises taking multiple frames of data using a different coded aperture array 6 for each frame. For each frame of data a decoding pattern is employed which is point source diffraction pattern corresponding to the coded aperture array used to acquire that frame. The decoding patterns are combined in a Gram matrix. A two-dimensional to one-dimensional mapping is applied to the frames of data. A solution to the data is constructed which is related to the scene (4) by an integral operator. The integral operator has an averaging kernel with a main lobe width which is smaller than the detector pixel size. Processing of the data yields an image which has sub-pixel resolution,
i.e. resolution greater than the native resolution of the detector (8).