公开(公告)号：US09536154B2

公开(公告)日：2017-01-03

申请号：US14273181

申请日：2014-05-08

Applicant: Axis AB

Inventor： Markus Skans ,  Anders Johannesson ,  Jiandan Chen ,  Joakim Baltsen

IPC: G06K9/00 ,  G08B13/196 ,  G06K9/20 ,  G06K9/62 ,  G06T7/20

CPC classification number: G06K9/00771 ,  G06K9/00369 ,  G06K9/2036 ,  G06K9/2054 ,  G06K9/6201 ,  G06T7/292 ,  G06T2207/10016 ,  G06T2207/20112 ,  G06T2207/30196 ,  G06T2207/30232 ,  G08B13/19652 ,  G08B13/19686

Abstract: A method of monitoring a scene by a camera (7) comprises marking a part (14) of the scene with light having a predefined spectral content and a spatial verification pattern. An analysis image is captured of the scene by a sensor sensitive to the predefined spectral content. The analysis image is segmented based on the predefined spectral content, to find a candidate image region. A spatial pattern is detected in the candidate image region, and a characteristic of the detected spatial pattern is compared to a corresponding characteristic of the spatial verification pattern. If the characteristics match, the candidate image region is identified as a verified image region corresponding to the marked part (14) of the scene. Image data representing the scene is obtained, and image data corresponding to the verified image region is processed in a first manner, and remaining image data is processed in a second manner.

Abstract translation: 通过照相机（7）监视场景的方法包括用具有预定义频谱内容和空间验证模式的光标记场景的一部分（14）。 通过对预定义的光谱内容敏感的传感器捕获场景的分析图像。 分析图像基于预定义的光谱内容被分割，以找到候选图像区域。 在候选图像区域中检测空间图案，并将检测到的空间图案的特性与空间验证图案的相应特征进行比较。 如果特征匹配，则候选图像区域被识别为对应于场景的标记部分（14）的验证图像区域。 获得表示场景的图像数据，并且以第一方式处理与经验证的图像区域相对应的图像数据，并且以第二方式处理剩余的图像数据。

公开(公告)号：US10152645B2

公开(公告)日：2018-12-11

申请号：US15587752

申请日：2017-05-05

Applicant: Axis AB

Inventor： Joakim Baltsen

IPC: G06K9/34 ,  G06F17/30 ,  G06K9/00 ,  G06T7/254

Abstract: There is provided a method and an apparatus for updating a background model used for background subtraction of an image. The method comprises: receiving an image (220), and classifying a region (226) in the image as foreground by performing background subtraction using a background model (240). The background model comprises a collection of background samples (248, 248b, 248c, 248d) for each pixel (228) in the image. The collection of background samples is arranged in a list of background images (242a, 242b, 242c, 242d). The method further comprises: replacing image contents in the region (226) of the image which is classified as foreground by image contents of a corresponding region (246) in a background image in the list, and adding the image to the list of background images by rearranging a collection of pointers (244a, 244b, 244c, 244d) which each points to one of the background images in the list, such that one of the pointers instead points to the image.

公开(公告)号：US10032283B2

公开(公告)日：2018-07-24

申请号：US14880416

申请日：2015-10-12

Applicant: Axis AB

Inventor： Joakim Baltsen ,  Mats Bylander

IPC: G06K9/00 ,  G06T7/20 ,  G06K9/20 ,  G06T5/00 ,  G06T5/20 ,  H04N5/33

Abstract: There is provided a method, a device and a system for modifying at least one parameter used by a video processing algorithm, such as a motion detection algorithm, an object detection algorithm, or an object tracking algorithm, for monitoring of a scene (102). The method comprises: receiving a first (105a) and a second (105b) video sequence of the scene (102), wherein the first video sequence (105a) is captured using a thermal camera (104a) such that the first video sequence (105a) comprises thermal information being indicative of temperatures in the scene (102), and applying the video processing algorithm to the second video sequence (105b), wherein at least one parameter used by the video processing algorithm is modified based on the thermal information comprised in the first video sequence (105a).

公开(公告)号：US20140334676A1

公开(公告)日：2014-11-13

申请号：US14273181

申请日：2014-05-08

Applicant: Axis AB

Inventor： Markus SKANS ,  Anders Johannesson ,  Jiandan Chen ,  Joakim Baltsen

IPC: G06K9/00 ,  G06T7/20 ,  G06K9/62

CPC classification number: G06K9/00771 ,  G06K9/00369 ,  G06K9/2036 ,  G06K9/2054 ,  G06K9/6201 ,  G06T7/292 ,  G06T2207/10016 ,  G06T2207/20112 ,  G06T2207/30196 ,  G06T2207/30232 ,  G08B13/19652 ,  G08B13/19686

Abstract: A method of monitoring a scene by a camera (7) comprises marking a part (14) of the scene with light having a predefined spectral content and a spatial verification pattern. An analysis image is captured of the scene by a sensor sensitive to the predefined spectral content. The analysis image is segmented based on the predefined spectral content, to find a candidate image region. A spatial pattern is detected in the candidate image region, and a characteristic of the detected spatial pattern is compared to a corresponding characteristic of the spatial verification pattern. If the characteristics match, the candidate image region is identified as a verified image region corresponding to the marked part (14) of the scene. Image data representing the scene is obtained, and image data corresponding to the verified image region is processed in a first manner, and remaining image data is processed in a second manner.

Abstract translation: 通过照相机（7）监视场景的方法包括用具有预定的频谱内容和空间验证模式的光标记场景的一部分（14）。 通过对预定义的光谱内容敏感的传感器捕获场景的分析图像。 分析图像基于预定义的光谱内容被分割，以找到候选图像区域。 在候选图像区域中检测空间图案，并将检测到的空间图案的特性与空间验证图案的相应特征进行比较。 如果特征匹配，则候选图像区域被识别为对应于场景的标记部分（14）的验证图像区域。 获取表示场景的图像数据，并且以第一方式处理与经验证的图像区域相对应的图像数据，并且以第二方式处理剩余的图像数据。