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    BACKGROUND-FOREGROUND MODULE FOR VIDEO ANALYSIS SYSTEM
    1.
    发明申请
    BACKGROUND-FOREGROUND MODULE FOR VIDEO ANALYSIS SYSTEM 有权
    视频分析系统背景模块

    公开(公告)号：US20090087096A1

    公开(公告)日：2009-04-02

    申请号：US12129521

    申请日：2008-05-29

    申请人： John Eric Eaton ,  Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Kishor Adinath Saitwal ,  Tao Yang ,  Ming-Jung Seow

    发明人： John Eric Eaton ,  Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Kishor Adinath Saitwal ,  Tao Yang ,  Ming-Jung Seow

    IPC分类号： G06K9/46 ,  G06K9/62

    CPC分类号： G06K9/38

    摘要： Embodiments of the present invention provide a method and a module for identifying a background of a scene depicted in an acquired stream of video frames that may be used by a video-analysis system. For each pixel or block of pixels in an acquired video frame a comparison measure is determined. The comparison measure depends on difference of color values exhibited in the acquired video frame and in a background image respectively by the pixel or block of pixels and a corresponding pixel and block of pixels in the background image. To determine the comparison measure, the resulting difference is considered in relation to a range of possible color values. If the comparison measure is above a dynamically adjusted threshold, the pixel or the block of pixels is classified as a part of the background of the scene.

    摘要翻译： 本发明的实施例提供了一种用于识别视频分析系统可以使用的所获取的视频帧流中描绘的场景的背景的方法和模块。 对于所获取的视频帧中的每个像素或像素块，确定比较度量。 比较测量取决于所获取的视频帧和背景图像中分别由像素或像素块以及背景图像中的对应像素和像素块显示的颜色值的差异。 为了确定比较测量，考虑到与可能的颜色值的范围的差异。 如果比较度量高于动态调整的阈值，像素或像素块被分类为场景背景的一部分。

    Adaptive update of background pixel thresholds using sudden illumination change detection
    2.
    发明授权
    Adaptive update of background pixel thresholds using sudden illumination change detection 有权
    使用突然照明变化检测自适应更新背景像素阈值

    公开(公告)号：US08285046B2

    公开(公告)日：2012-10-09

    申请号：US12388409

    申请日：2009-02-18

    申请人： Wesley Kenneth Cobb ,  Kishor Adinath Saitwal ,  Bobby Ernest Blythe ,  Tao Yang

    发明人： Wesley Kenneth Cobb ,  Kishor Adinath Saitwal ,  Bobby Ernest Blythe ,  Tao Yang

    IPC分类号： G06K9/34

    CPC分类号： G06K9/00771

    摘要： Techniques are disclosed for a computer vision engine to update both a background model and thresholds used to classify pixels as depicting scene foreground or background in response to detecting that a sudden illumination changes has occurred in a sequence of video frames. The threshold values may be used to specify how much pixel a given pixel may differ from corresponding values in the background model before being classified as depicting foreground. When a sudden illumination change is detected, the values for pixels affected by sudden illumination change may be used to update the value in the background image to reflect the value for that pixel following the sudden illumination change as well as update the threshold for classifying that pixel as depicting foreground/background in subsequent frames of video.

    摘要翻译： 公开了用于计算机视觉引擎的技术，用于更新背景模型和用于将像素分类为描绘场景前景或背景的阈值，以响应于检测到在视频帧序列中已经发生突然的照明变化。 可以使用阈值来指定给定像素在分类为描绘前景之前可能与背景模型中的对应值不同的像素。 当检测到突然的照明变化时，可以使用受突然照明改变影响的像素的值来更新背景图像中的值，以反映在突然照射变化之后该像素的值，并且更新用于对该像素进行分类的阈值 作为描绘后续视频帧中的前景/背景。

    Background-foreground module for video analysis system
    4.
    发明授权
    Background-foreground module for video analysis system 有权
    视频分析系统的背景前景模块

    公开(公告)号：US08094943B2

    公开(公告)日：2012-01-10

    申请号：US12129521

    申请日：2008-05-29

    申请人： John Eric Eaton ,  Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Kishor Adinath Saitwal ,  Tao Yang ,  Ming-Jung Seow

    发明人： John Eric Eaton ,  Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Kishor Adinath Saitwal ,  Tao Yang ,  Ming-Jung Seow

    IPC分类号： G06K9/46 ,  G06K9/62 ,  G06K9/00

    CPC分类号： G06K9/38

    摘要： Embodiments of the present invention provide a method and a module for identifying a background of a scene depicted in an acquired stream of video frames that may be used by a video-analysis system. For each pixel or block of pixels in an acquired video frame a comparison measure is determined. The comparison measure depends on difference of color values exhibited in the acquired video frame and in a background image respectively by the pixel or block of pixels and a corresponding pixel and block of pixels in the background image. To determine the comparison measure, the resulting difference is considered in relation to a range of possible color values. If the comparison measure is above a dynamically adjusted threshold, the pixel or the block of pixels is classified as a part of the background of the scene.

    摘要翻译： 本发明的实施例提供了一种用于识别视频分析系统可以使用的所获取的视频帧流中描绘的场景的背景的方法和模块。 对于所获取的视频帧中的每个像素或像素块，确定比较度量。 比较测量取决于所获取的视频帧和背景图像中分别由像素或像素块以及背景图像中的对应像素和像素块显示的颜色值的差异。 为了确定比较测量，考虑到与可能的颜色值的范围的差异。 如果比较度量高于动态调整的阈值，像素或像素块被分类为场景背景的一部分。

    SCENE PRESET IDENTIFICATION USING QUADTREE DECOMPOSITION ANALYSIS
    5.
    发明申请
    SCENE PRESET IDENTIFICATION USING QUADTREE DECOMPOSITION ANALYSIS 有权
    使用四分位分解分析的场景预设识别

    公开(公告)号：US20110043625A1

    公开(公告)日：2011-02-24

    申请号：US12543223

    申请日：2009-08-18

    申请人： Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Rajkiran Kumar Gottumukkal ,  Kishor Adinath Saitwal ,  Gang Xu ,  Tao Yang

    发明人： Wesley Kenneth Cobb ,  Bobby Ernest Blythe ,  Rajkiran Kumar Gottumukkal ,  Kishor Adinath Saitwal ,  Gang Xu ,  Tao Yang

    IPC分类号： H04N7/18 ,  G06K9/62

    CPC分类号： G06K9/00771 ,  G06T7/254 ,  G06T2207/20081 ,  G06T2207/30232

    摘要： Techniques are disclosed for matching a current background scene of an image received by a surveillance system with a gallery of scene presets that each represent a previously captured background scene. A quadtree decomposition analysis is used to improve the robustness of the matching operation when the scene lighting changes (including portions containing over-saturation/under-saturation) or a portion of the content changes. The current background scene is processed to generate a quadtree decomposition including a plurality of window portions. Each of the window portions is processed to generate a plurality of phase spectra. The phase spectra are then projected onto a corresponding plurality of scene preset image matrices of one or more scene preset. When a match between the current background scene and one of the scene presets is identified, the matched scene preset is updated. Otherwise a new scene preset is created based on the current background scene.

    摘要翻译： 公开了用于将由监视系统接收的图像的当前背景场景与每个表示先前捕获的背景场景的场景预设画廊进行匹配的技术。 当场景照明改变（包括包含过饱和/欠饱和的部分）或内容的一部分改变时，使用四叉树分解分析来提高匹配操作的鲁棒性。 处理当前背景场景以产生包括多个窗口部分的四叉树分解。 每个窗口部分被处理以产生多个相位谱。 然后将相位谱投影到一个或多个场景预设的相应的多个场景预设图像矩阵上。 当当前背景场景与其中一个场景预设之间的匹配被识别时，匹配的场景预设被更新。 否则，将根据当前的背景场景创建一个新的场景预设。

    FIELD-OF-VIEW CHANGE DETECTION
    8.
    发明申请
    FIELD-OF-VIEW CHANGE DETECTION 审中-公开
    视场变化检测

    公开(公告)号：US20110043689A1

    公开(公告)日：2011-02-24

    申请号：US12543281

    申请日：2009-08-18

    申请人： Wesley Kenneth Cobb ,  Dennis Gene Urech ,  Bobby Ernest Blythe ,  Rajkiran Kumar Gottumukkal ,  Kishor Adinath Saitwal ,  Tao Yang ,  Lon William Risinger

    发明人： Wesley Kenneth Cobb ,  Dennis Gene Urech ,  Bobby Ernest Blythe ,  Rajkiran Kumar Gottumukkal ,  Kishor Adinath Saitwal ,  Tao Yang ,  Lon William Risinger

    IPC分类号： H04N9/74 ,  H04N7/01

    CPC分类号： H04N5/275 ,  G06K9/00765 ,  G06T7/246 ,  G06T2207/10016 ,  H04N5/147

    摘要： Techniques are disclosed for detecting a field-of-view change for a video feed. These techniques differentiate between a new or changed scene and a temporary variation in the scene to accurately detect field-of-view changes for the video feed. A field-of-view change is detected when the position of a camera providing the video feed changes, the video feed is switched to a different camera, the video feed is disconnected, or the camera providing the video feed is obscured. A false-positive field-of-view change is not detected when the scene changes due to a sudden variation in illumination, obstruction of a portion of the camera providing the video feed, blurred images due to an out-of-focus camera, or a transition between bright and dark light when the video feed transitions between color and near infrared capture modes.

    摘要翻译： 公开了用于检测视频馈送的视场改变的技术。 这些技术区分新的或改变的场景和场景中的临时变化，以准确地检测视频馈送的视场变化。 当提供视频馈送的相机的位置改变，视频馈送被切换到不同的相机，视频馈送被断开或提供视频馈送的相机被遮蔽时，检测到视野改变。 当场景由于照明的突然变化，提供视频馈送的摄像机的一部分的阻塞，由于离焦照相机引起的模糊图像而变化时，不会检测到假阳性视场改变，或 视频馈送在彩色和近红外捕获模式之间转换时，亮光和暗光之间的转换。

    ADAPTIVE UPDATE OF BACKGROUND PIXEL THRESHOLDS USING SUDDEN ILLUMINATION CHANGE DETECTION
    10.
    发明申请
    ADAPTIVE UPDATE OF BACKGROUND PIXEL THRESHOLDS USING SUDDEN ILLUMINATION CHANGE DETECTION 有权
    使用SUDDEN ILLUMINATION CHANGE DETECTION的背景像素阈值的自适应更新

    公开(公告)号：US20100208986A1

    公开(公告)日：2010-08-19

    申请号：US12388409

    申请日：2009-02-18

    申请人： WESLEY KENNETH COBB ,  Kishor Adinath Saitwal ,  Bobby Ernest Blythe ,  Tao Yang

    发明人： WESLEY KENNETH COBB ,  Kishor Adinath Saitwal ,  Bobby Ernest Blythe ,  Tao Yang

    IPC分类号： G06K9/62

    CPC分类号： G06K9/00771

    摘要： Techniques are disclosed for a computer vision engine to update both a background model and thresholds used to classify pixels as depicting scene foreground or background in response to detecting that a sudden illumination changes has occurred in a sequence of video frames. The threshold values may be used to specify how much pixel a given pixel may differ from corresponding values in the background model before being classified as depicting foreground. When a sudden illumination change is detected, the values for pixels affected by sudden illumination change may be used to update the value in the background image to reflect the value for that pixel following the sudden illumination change as well as update the threshold for classifying that pixel as depicting foreground/background in subsequent frames of video.

    摘要翻译： 公开了用于计算机视觉引擎的技术，用于更新背景模型和用于将像素分类为描绘场景前景或背景的阈值，以响应于检测到在视频帧序列中已经发生突然的照明变化。 可以使用阈值来指定给定像素在分类为描绘前景之前可能与背景模型中的对应值不同的像素。 当检测到突然的照明变化时，可以使用受突然照明改变影响的像素的值来更新背景图像中的值，以反映在突然照射变化之后该像素的值，并且更新用于对该像素进行分类的阈值 作为描绘后续视频帧中的前景/背景。