Apparatus and process for detecting scene breaks in a sequence of video
frames
    1.
    发明授权
    Apparatus and process for detecting scene breaks in a sequence of video frames 失效
    用于检测视频帧序列中的场景中断的设备和过程

    公开(公告)号:US5767922A

    公开(公告)日:1998-06-16

    申请号:US628374

    申请日:1996-04-05

    IPC分类号: H04N5/14

    CPC分类号: G06K9/00711 H04N5/147

    摘要: Apparatus and process for detecting scene breaks in a sequence of video frames providing a moving picture. Entering and exiting edge pixels in each of a plurality of successive video frames are counted, and an edge change fraction for each of the successive video frames is derived therefrom. Peaks which are detected in the edge change fractions are indicative of scene breaks.

    摘要翻译: 用于检测提供运动图像的视频帧序列中的场景中断的装置和过程。 对多个连续视频帧中的每一个中进入和退出边缘像素进行计数,并从其中导出每个连续视频帧的边缘变化分数。 在边缘变化分数中检测到的峰表示场景中断。

    System and method for generating composite subtraction images for magnetic resonance imaging
    3.
    发明授权
    System and method for generating composite subtraction images for magnetic resonance imaging 有权
    用于生成用于磁共振成像的复合减影图像的系统和方法

    公开(公告)号:US07545967B1

    公开(公告)日:2009-06-09

    申请号:US10664425

    申请日:2003-09-17

    IPC分类号: G06K9/00

    摘要: In time-resolved contrast-enhanced magnetic resonance angiography, a measure quantifying image quality provides a basis for generating a linear filtered composite image by facilitating selection of a mask and an arterial phase image for subtraction. Filtering of individual pixels of a temporal series of images provides enhanced contrast in a single image by allowing the temporal behavior of the pixel intensity to denote representation as an artery, vein or background tissue. Motion artifacts are suppressed by re-registering sequential images, adjusting weighting before averaging and subtraction and filtering the Fourier data to eliminate data corrupted by motion or other phenomena.

    摘要翻译: 在时间分辨的对比度增强磁共振血管造影术中,量化图像质量的度量为通过促进选择掩模和用于减法的动脉相位图像生成线性滤波的复合图像提供了基础。 通过使像素强度的时间行为表示为动脉,静脉或背景组织,对时间序列图像中的各个像素进行滤波,从而在单个图像中提供增强的对比度。 通过重新注册顺序图像来抑制运动伪影,在平均和减法之前调整加权并对傅立叶数据进行滤波以消除由运动或其他现象损坏的数据。

    Method and apparatus for analyzing computer screens
    5.
    发明授权
    Method and apparatus for analyzing computer screens 失效
    分析计算机屏幕的方法和装置

    公开(公告)号:US06226407B1

    公开(公告)日:2001-05-01

    申请号:US09044209

    申请日:1998-03-18

    IPC分类号: G06K962

    CPC分类号: G06T7/001 G06T2207/30176

    摘要: An invention for quantitatively analyzing bitmap images using computer vision is disclosed. In one embodiment, these bitmap images correspond to the rendered screens of two applications based on a same data source file. An optional preprocessing step filters non-important information for analyzing purposes such as the background, replaces each image with a blank image of the same size, and modifies non-visible attributes of a screen so their structure can be recovered during the computer vision processing. After a series of rendered screens of each application are captured, these bitmap images are interpreted using computer vision techniques to produce machine-readable visual attributes of the rendered screens. Corresponding attributes from each of the two applications are then compared to generate a set of differences, where those differences within a predefined set of deliberate design differences are ignored. These attributes and differences are then processed to derive a set of grades reflecting the similarities between the rendered screens of the two applications. In determining these grades, a set of user-definable thresholds are used to overlook small variances inherent in the rendering by the different applications.

    摘要翻译: 公开了一种使用计算机视觉定量分析位图图像的发明。 在一个实施例中,这些位图图像对应于基于相同数据源文件的两个应用的渲染屏幕。 可选的预处理步骤过滤用于分析目的(例如背景)的非重要信息,用相同大小的空白图像替换每个图像,并修改屏幕的不可见属性,以便在计算机视觉处理期间可以恢复其结构。 在捕获每个应用程序的一系列渲染屏幕之后,使用计算机视觉技术解释这些位图图像以产生渲染屏幕的机器可读的视觉属性。 然后将来自两个应用中的每一个的相应属性进行比较以产生一组差异,其中在预定义的故意设计差异集合内的那些差异被忽略。 然后处理这些属性和差异以得出反映两个应用程序的渲染屏幕之间的相似性的一组等级。 在确定这些等级时,可以使用一组用户可定义的阈值来忽略不同应用程序渲染中固有的小变化。

    System and method for generating composite substraction images for magnetic resonance imaging
    6.
    发明授权
    System and method for generating composite substraction images for magnetic resonance imaging 有权
    用于生成用于磁共振成像的复合减影图像的系统和方法

    公开(公告)号:US07734078B2

    公开(公告)日:2010-06-08

    申请号:US12475797

    申请日:2009-06-01

    IPC分类号: G06K9/00

    摘要: In time-resolved contrast-enhanced magnetic resonance angiography, a measure quantifying image quality provides a basis for generating a linear filtered composite image by facilitating selection of a mask and an arterial phase image for subtraction. Filtering of individual pixels of a temporal series of images provides enhanced contrast in a single image by allowing the temporal behavior of the pixel intensity to denote representation as an artery, vein or background tissue. Motion artifacts are suppressed by re-registering sequential images, adjusting weighting before averaging and subtraction and filtering the Fourier data to eliminate data corrupted by motion or other phenomena.

    摘要翻译: 在时间分辨的对比度增强磁共振血管造影术中,量化图像质量的度量为通过促进选择掩模和用于减法的动脉相位图像生成线性滤波的复合图像提供了基础。 通过使像素强度的时间行为表示为动脉,静脉或背景组织,对时间序列图像中的各个像素进行滤波,从而在单个图像中提供增强的对比度。 通过重新注册顺序图像来抑制运动伪影,在平均和减法之前调整加权并对傅立叶数据进行滤波以消除由运动或其他现象损坏的数据。

    SYSTEM AND METHOD FOR GENERATING COMPOSITE SUBSTRACTION IMAGES FOR MAGNETIC RESONANCE IMAGING
    7.
    发明申请
    SYSTEM AND METHOD FOR GENERATING COMPOSITE SUBSTRACTION IMAGES FOR MAGNETIC RESONANCE IMAGING 有权
    用于生成用于磁共振成像的复合成像图像的系统和方法

    公开(公告)号:US20090245606A1

    公开(公告)日:2009-10-01

    申请号:US12475797

    申请日:2009-06-01

    IPC分类号: G06K9/00

    摘要: In time-resolved contrast-enhanced magnetic resonance angiography, a measure quantifying image quality provides a basis for generating a linear filtered composite image by facilitating selection of a mask and an arterial phase image for subtraction. Filtering of individual pixels of a temporal series of images provides enhanced contrast in a single image by allowing the temporal behavior of the pixel intensity to denote representation as an artery, vein or background tissue. Motion artifacts are suppressed by re-registering sequential images, adjusting weighting before averaging and subtraction and filtering the Fourier data to eliminate data corrupted by motion or other phenomena.

    摘要翻译: 在时间分辨的对比度增强磁共振血管造影术中,量化图像质量的度量为通过促进选择掩模和用于减法的动脉相位图像生成线性滤波的复合图像提供了基础。 通过使像素强度的时间行为表示为动脉,静脉或背景组织,对时间序列图像中的各个像素进行滤波,从而在单个图像中提供增强的对比度。 通过重新注册顺序图像来抑制运动伪影,在平均和减法之前调整加权并对傅立叶数据进行滤波以消除由运动或其他现象损坏的数据。