一种基于广义树稀疏的权重核范数磁共振成像重建方法

    公开(公告)号:WO2018099321A1

    公开(公告)日:2018-06-07

    申请号:PCT/CN2017/112639

    申请日:2017-11-23

    IPC分类号: G06T5/00

    摘要: 一种基于广义树稀疏的权重核范数磁共振成像重建方法,首先,获取测试磁共振成像采样数据样本进行傅立叶变换;并根据采样的信号构建出树结构的稀疏信号,利用带权重的核范数逼近约束的目标函数的稀疏表达;再通过增广拉格朗日乘子法优化约束的目标函数和交替方向搜索算法对所述测试数据进行迭代更新,直至得到估计的恢复数据;再通过构建树稀疏反变换得到最后的恢复图像。利用充分挖掘图像信号的内部结构关系,将图像块的广义树稀疏结构特性与权重核范数结合,并利用ADMM算法简化计算过程,降低算法复杂度,提高了部分空间数据重建图像的性能,在更少的扫描测量下更精确地重建图像,减少重建图像的伪影,实现快速磁共振成像。

    APPARATUS FOR NOISE REDUCTION IN BODY PART IMAGERY
    3.
    发明申请
    APPARATUS FOR NOISE REDUCTION IN BODY PART IMAGERY 审中-公开
    减少身体部位图像噪音的装置

    公开(公告)号:WO2018083073A1

    公开(公告)日:2018-05-11

    申请号:PCT/EP2017/077841

    申请日:2017-10-31

    IPC分类号: G06T5/00 G06T11/00

    摘要: The present invention relates to an apparatus (10) for noise reduction in body part imagery. It is described to provide (210) at least one image; wherein, the at least one image comprises pixel image data of a body part. At least one edge in the at least one image is detected (220), wherein at least one subset of the pixel image data is associated with the at least one edge. Noise in the at least one image is reduced (230), the reduction in noise comprising application of a regularization term to the at least one subset of the pixel image data, wherein the regularization term comprises a plurality of regularization weights. A first vector is determined (240) that is normal to a contour of the at least one edge that is associated with a first pixel of the at least one subset of the pixel image data. At least one second vector is determined (250) that extends from the first pixel to at least one second pixel of the at least one subset of the pixel image data. At least one regularization weight associated with the first pixel and the at least one second pixel is determined (260), wherein a first regularization weight associated with the first pixel and a first one of the at least one second pixel is based in part on an angle between the first vector and a second vector associated with the first one of the at least one second pixel.

    摘要翻译: 本发明涉及用于身体部位图像中的降噪的设备(10)。 描述了提供(210)至少一个图像; 其中,所述至少一个图像包括身体部分的像素图像数据。 检测所述至少一个图像中的至少一个边缘(220),其中所述像素图像数据的至少一个子集与所述至少一个边缘相关联。 减少(230)至少一个图像中的噪声,噪声的减少包括将正则化项应用于像素图像数据的至少一个子集,其中正则化项包括多个正则化权重。 确定(240)第一矢量,该第一矢量垂直于与像素图像数据的至少一个子集的第一像素相关联的至少一个边缘的轮廓。 确定(250)至少一个第二矢量,该第二矢量从像素图像数据的至少一个子集的第一像素延伸到至少一个第二像素。 确定与所述第一像素和所述至少一个第二像素相关联的至少一个正则化权重(260),其中与所述第一像素和所述至少一个第二像素中的第一像素相关联的第一正则化权重部分地基于 第一个向量和与至少一个第二像素中的第一个相关联的第二向量之间的夹角。

    METHODS AND SYSTEMS OF PERFORMING ADAPTIVE MORPHOLOGY OPERATIONS IN VIDEO ANALYTICS
    4.
    发明申请
    METHODS AND SYSTEMS OF PERFORMING ADAPTIVE MORPHOLOGY OPERATIONS IN VIDEO ANALYTICS 审中-公开
    在视频分析中执行自适应形态学操作的方法和系统

    公开(公告)号:WO2018026427A1

    公开(公告)日:2018-02-08

    申请号:PCT/US2017/034574

    申请日:2017-05-25

    IPC分类号: G06T7/155 G06T7/194

    摘要: Techniques and systems are provided for processing video data. For example, techniques and systems are provided for performing content-adaptive morphology operations. A first erosion function can be performed on a foreground mask of a video frame, including setting one or more foreground pixels of the frame to one or more background pixels. A temporary foreground mask can be generated based on the first erosion function being performed on the foreground mask. One or more connected components can be generated for the frame by performing connected component analysis to connect one or more neighboring foreground pixels. A complexity of the frame (or of the foreground mask of the frame) can be determined by comparing a number of the one or more connected components to a threshold number. A second erosion function can be performed on the temporary foreground mask when the number of the one or more connected components is higher than the threshold number. The one or more connected components can be output for blob processing when the number of the one or more connected components is lower than the threshold number.

    摘要翻译: 提供了用于处理视频数据的技术和系统。 例如,提供用于执行内容自适应形态学操作的技术和系统。 可以在视频帧的前景蒙板上执行第一侵蚀函数,包括将该帧的一个或多个前景像素设置为一个或多个背景像素。 可以基于在前景蒙版上执行的第一侵蚀函数来生成临时前景蒙版。 通过执行连接分量分析来连接一个或多个相邻的前景像素,可以为该帧生成一个或多个连接的分量。 可以通过将一个或多个连接组件的数量与阈值数量进行比较来确定帧(或帧的前景掩码)的复杂度。 当一个或多个连通分量的数量高于阈值数量时,可以在临时前景掩模上执行第二侵蚀函数。 当一个或多个连接组件的数量低于阈值数量时,可以输出一个或多个连接的组件用于斑点处理。

    FUSED IMAGE OPTIMIZATION SYSTEMS AND METHODS
    5.
    发明申请
    FUSED IMAGE OPTIMIZATION SYSTEMS AND METHODS 审中-公开
    融合图像优化系统和方法

    公开(公告)号:WO2018017904A1

    公开(公告)日:2018-01-25

    申请号:PCT/US2017/043181

    申请日:2017-07-20

    IPC分类号: G06T5/00 G06T5/50

    摘要: Systems and methods disclosed herein, in accordance with one or more embodiments, provide for the generation of a fused image optimized for a target resolution, such as by receiving an infrared (IR) image captured by an IR imaging sensor, receiving a visible light (VL) image captured by a VL imaging sensor, determining a scaling factor based on a difference between the target resolution and a baseline resolution, and determining a set of target fusion parameters at least by modifying, according to the scaling factor, a set of baseline fusion parameters associated with the baseline resolution. A fused image is generated having the target resolution at least by fusing the IR image and the VL image according to the set of target fusion parameters.

    摘要翻译: 根据一个或多个实施例,本文公开的系统和方法提供针对目标分辨率生成优化的融合图像,例如通过接收由IR捕获的红外(IR)图像 成像传感器,接收由VL成像传感器捕获的可见光(VL)图像,基于目标分辨率和基线分辨率之间的差确定缩放因子,以及至少通过根据以下公式来确定一组目标融合参数: 比例因子,与基线分辨率相关的一组基线融合参数。 至少通过根据该组目标融合参数融合IR图像和VL图像来生成具有目标分辨率的融合图像。

    CONTRAST-ENHANCED COMBINED IMAGE GENERATION SYSTEMS AND METHODS
    7.
    发明申请
    CONTRAST-ENHANCED COMBINED IMAGE GENERATION SYSTEMS AND METHODS 审中-公开
    对比度增强的组合图像生成系统和方法

    公开(公告)号:WO2016205419A1

    公开(公告)日:2016-12-22

    申请号:PCT/US2016/037698

    申请日:2016-06-15

    IPC分类号: G06T5/50

    摘要: Various techniques are disclosed to generate a contrast-enhanced combined image based on a thermal image and high spatial frequency content extracted from a visual light image, said images depicting the same scene. In one example, a method comprises: determining a blending measure indicating the quality of at least one of said images; combining luminance components of pixel values comprised in the thermal image and of pixel values representing high spatial frequency content comprised in the visual light image based on the blending measure; and generating a contrast-enhanced combined image based on the thermal image and the combined luminance components.

    摘要翻译: 公开了各种技术,以基于从图像提取的热图像和高空间频率内容生成对比度增强的组合图像,所述图像描绘相同的场景。 在一个示例中,一种方法包括:确定指示所述图像中的至少一个的质量的混合度量; 基于所述混合测量,组合包括在所述热图像中的像素值的亮度分量和表示包括在所述视觉光图像中的高空间频率内容的像素值; 以及基于热图像和组合的亮度分量生成对比度增强的组合图像。

    APPARATUS AND METHOD FOR NON-UNIFORM FRAME BUFFER RASTERIZATION
    8.
    发明申请
    APPARATUS AND METHOD FOR NON-UNIFORM FRAME BUFFER RASTERIZATION 审中-公开
    非均匀框架缓冲器放大的装置和方法

    公开(公告)号:WO2016171816A1

    公开(公告)日:2016-10-27

    申请号:PCT/US2016/022793

    申请日:2016-03-17

    申请人: INTEL CORPORATION

    摘要: An apparatus and method are described for a non-uniform rasterizer. For example, one embodiment of an apparatus comprises: a graphics processor to process graphics data and render images using the graphics data; and a non-uniform rasterizer within the graphics processor to determine different resolutions to be used for different regions of an image, the non-uniform rasterizer to receive a plurality of polygons to be rasterized and to responsively rasterize the polygons in accordance with the different resolutions.

    摘要翻译: 对于不均匀的光栅化器描述了一种装置和方法。 例如,设备的一个实施例包括:图形处理器,用于处理图形数据并使用图形数据呈现图像; 以及所述图形处理器内的不均匀光栅化器,以确定要用于图像的不同区域的不同分辨率,所述不均匀光栅化器接收要被光栅化的多个多边形,并且根据所述不同分辨率响应地光栅化所述多边形 。