WO2019137499A1 - 适用于定点监控的摄像机 - Google Patents

适用于定点监控的摄像机 Download PDF

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Publication number
WO2019137499A1
WO2019137499A1 PCT/CN2019/071453 CN2019071453W WO2019137499A1 WO 2019137499 A1 WO2019137499 A1 WO 2019137499A1 CN 2019071453 W CN2019071453 W CN 2019071453W WO 2019137499 A1 WO2019137499 A1 WO 2019137499A1
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camera
video image
position information
location information
image
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PCT/CN2019/071453
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English (en)
French (fr)
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许彐琼
任文华
任珂
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许彐琼
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Publication of WO2019137499A1 publication Critical patent/WO2019137499A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to a video camera, and more particularly to a video camera capable of forming a video image having position information.
  • GPS Global Positioning System enables real-time positioning and navigation on a global scale.
  • Reference 1 Chinese Patent Document (hereinafter referred to as Reference 1) of the publication No. CN101150663A, the application number is CN200710152819.X, a camera device having a GPS device, which uses a GPS device, will be disclosed on March 26, 2008.
  • the measured position information is attached to the captured image.
  • the shooting position of the image can be known by referring to the position information measured by the GPS device, and the desired captured image can be retrieved based on the shooting location.
  • the GPS device is used to acquire the camera device at the relevant location. Since the GPS device is configured, the complexity and cost of the camera device are increased. In addition, in the indoor environment, the GPS device cannot work normally, and the location information provided may be incorrect.
  • the technical solution adopted by the present invention is: a camera suitable for fixed point monitoring, the camera comprising: an imaging device for shooting a monitoring place or a monitoring object to generate a video image;
  • the camera further includes: a location information storage device, the location information storage device is a non-volatile memory and stores location information of the camera installation point; and the information adding device is configured to store the location information of the camera installation point stored by the location information storage device Add to the video image.
  • the monitoring point is usually pre-planned or set, and the position of the camera mounting point can be predetermined. In general, the exact location of the camera mounting point can be pre-measured or measured by various positioning devices.
  • the device of the present invention stores the position information of the camera mounting point into the position information storage device, and adds the position information of the camera mounting point to the video image by the information adding device, thereby forming a video image having the position information of the camera mounting point. Since the position of the camera mounting point is actually the position where the camera is located, the user can know the location of the video image in the captured video image, and can quickly find the relevant video image according to the shooting location, which is beneficial to the later stage. Search and analysis.
  • the device of the present invention uses the position information storage device to store the relevant position. Information, and the cost of the location information storage device is lower than the cost of the GPS device, which is advantageous for reducing the cost of the camera; further, the position information formed by the device of the present invention in the video image is relatively accurate, unlike an imaging device having a GPS device. As a result, the GPS device does not work properly due to the blockage of the building, resulting in a large error in the position information provided.
  • the location information storage device stores not only the location information of the camera installation point but also the location information of the camera monitoring area
  • the information adding device stores the location information of the camera installation point and the camera stored by the location information storage device.
  • the location information of the monitoring area is added to the video image.
  • the video image with position information formed by the camera not only has the position information of the camera mounting point, but also has the position information of the camera monitoring area, and the user can know in the captured video image that the camera for shooting is located.
  • the location and the approximate location of the monitoring location or monitoring object appearing in the video image can also quickly find the relevant video image according to the location of the camera or the monitoring location or the approximate location of the monitoring object, which is beneficial to the video image. Search and analysis also facilitate the use of video images as evidence.
  • the camera monitoring area mentioned here refers to the area where the video image can be captured by the camera. Under normal circumstances, the precise requirements of fixed-point monitoring for location are not high, so the position of the camera monitoring area can usually be represented by the position of a certain point in the surveillance area of the camera, or by the position of several points in the surveillance area of the camera.
  • the location information storage device stores not only the location information of the camera installation point but also the location information of at least one point in the camera surveillance area
  • the information adding device stores the location information of the camera installation point and the camera stored by the location information storage device.
  • the position information of the points in the monitoring area is added to the video image. Since the position of the point in the surveillance area of the camera can usually represent the approximate position of the surveillance area of the camera, the user can know the location of the camera that captured the video image and the monitoring location that appears in the video image in the captured video image. Or the approximate location of the monitored object, or the relevant video image can be quickly found according to the location where the camera is located or the approximate location where the monitored location or monitored object appears.
  • the location information stored by the location information storage device is stored before the camera monitors the work.
  • the position of the camera installation point of the monitoring site is measured by a dedicated position measuring device or obtained from the geographic management department.
  • the position of the selected point in the camera monitoring area or the position of the camera monitoring area can also be measured or used by a dedicated position measuring device. Other ways to determine.
  • the location information can be represented by three-dimensional coordinates or by other means. Longitude, latitude, and altitude can often be used to represent position information for a point.
  • the location information of these selected points or regions is typically written or stored in the location information storage device by a dedicated program writer.
  • the location information storage device is usually a non-volatile memory, so that the stored location information is not lost after power-off, and can be called at any time.
  • the camera comprises a storage interface for the insertion of the location information storage device, and the location information storage device can transmit the location information stored by the location information storage device to the information adding device via the storage interface. This makes it easy to dial the location information storage device from the storage interface and place it on the program-specific write device to write or rewrite specific location information. When the location information storage device writes the specific location information, it can be conveniently inserted into the storage interface for normal calling.
  • the camera further includes time generating means for generating time
  • the information adding means is further for adding time information generated by the time generating means to the video image.
  • the video image thus formed has not only relevant position information but also time information at the time of imaging. The user can clearly know the location and time of the captured video image, which is very beneficial for subsequent search and analysis of video image related content or use of the video image as evidence.
  • the video image generated by the camera device needs to be compressed.
  • the camera comprises an image compression device, wherein the video image generated by the camera device is first compressed by the image compression device, and the information added device adds the location information stored by the location information storage device to the compressed device. In the processed video image. The position information thus added to the video image does not require subsequent compression processing, and the added position information is not easily lost.
  • the camera includes an image compression device, wherein the information adding device first adds the location information stored by the location information storage device to the video image generated by the camera device to form a video image having location information, The video image having the position information is then subjected to compression processing by the image compression device. In this way, the position information added to the video image first needs subsequent compression processing, and the added position information is easily lost. At this time, the image compression device is more difficult to perform compression processing.
  • the image compression device and the information adding device can segment the video image.
  • the captured video image is divided into a plurality of small segments, and the short segment may be a frame image or a multi-frame image.
  • the information adding device adds information to the segment, which is equivalent to edge compression and edge. Add to.
  • the manner in which location information or time information is added to the video image by the information adding means includes addition and embedding. Methods of attachment and embedding are well known. In Reference 1, there is a description of the additional method; there is a detailed description of the embedding method in the book “Introduction to Information Hiding” (Electronic Industry Press, November 2014).
  • the information adding means appends the location information stored by the storage means to the video image, wherein the location information attached to the video image is visible.
  • the location information attached to the video image is visible.
  • the information adding means embeds the position information stored by the position information storage means into the video image, wherein the position information embedded in the video image is non-visible.
  • the captured video image is played, its position information is not visible, but the relevant position information can be retrieved in an appropriate manner, which is advantageous for preventing tampering with the video image for use as evidence.
  • the information adding means embeds the position information stored by the position information storage means into the video image, and adds time information generated by the time generating means to the video image, wherein The position information in the video image is non-visible, and the time information attached to the video image is visible.
  • the information adding means appends both the location information stored by the location information storage means and the time information generated by the time generating means to the video image, wherein the location information attached to the video image And time information is visible.
  • the location information storage device may also store the orientation information of the camera, and the information adding device is further configured to add the orientation information of the camera stored by the location information storage device to the video image.
  • FIG. 1 is a block diagram of one embodiment of a video camera of the present invention.
  • Fig. 2 is a view showing the positional relationship of the camera shown in Fig. 1 when it is placed at a fixed point monitoring place;
  • FIG. 3 is a flow chart showing the first CPU processing steps of the camera shown in FIG. 1.
  • FIG. 1 shows a block diagram of one embodiment of a camera of the present invention.
  • the video camera 100 of the present embodiment is mainly composed of a lens 1, an imaging device 2, an imaging circuit 3, an analog-to-digital converter 4, a video signal processing circuit 5, an actuator 6, and actuation.
  • the lens 1 is used to form an optical image of a monitoring place or a monitoring object, and to image a monitoring place or a monitoring object on a light receiving surface of the image pickup device 2.
  • the image pickup device 2 is a device for performing image decomposition and photoelectric signal conversion for receiving an optical image of a monitoring field or a monitoring object formed by the lens 1, and performing photoelectric conversion processing to output an electric image signal.
  • the image pickup device 2 generally employs a solid-state image pickup device, and the image pickup device of this embodiment employs a charge coupled (CCD) device.
  • CCD charge coupled
  • the imaging circuit 3 is a circuit that receives an image signal from the imaging device 2 and performs various analog signal processing on the image signal.
  • the image pickup circuit 3 of the present embodiment performs white balance and image gradation correction processing on the image signal from the image pickup device 2, and transmits the processed image signal to the analog-to-digital converter 4.
  • the analog to digital converter 4 is an electronic device that converts an analog signal into a digital signal.
  • the analog-to-digital converter 4 of the present embodiment is for receiving an image signal of an analog form from the image pickup circuit 3 and converting it into an image signal in a digital form.
  • the actuator 6 is a drive source for driving the lens 1 to perform autofocus or zoom.
  • the actuator drive circuit 7 is a circuit that controls and drives the operation of the actuator 6 in accordance with a control command of the second CPU 16.
  • the above-described lens 1, imaging device 2, imaging circuit 3, analog-to-digital converter 4, actuator 6, actuator drive circuit 7, and the like constitute a monitoring place or a monitoring target of the camera 100.
  • the main part of the image pickup apparatus that performs imaging and generates a video image.
  • the video signal processing circuit 5 is a circuit that receives a digital image signal from the analog-to-digital converter 4 and performs various digital signal processing.
  • the video signal processing circuit 5 has an image conversion function for converting a digital image signal from the analog-to-digital converter 4 into an image format of a YUV format (Y: luminance data; UV: color difference data).
  • the video signal processing circuit 5 of the present embodiment also has an image compression function, that is, a function of an image compression device for performing compression processing on an image signal of the YUV format based on the MPEG compression method, and the image signal output by the video signal processing circuit 5 is a Compressed image signal.
  • an image compression function that is, a function of an image compression device for performing compression processing on an image signal of the YUV format based on the MPEG compression method, and the image signal output by the video signal processing circuit 5 is a Compressed image signal.
  • the image memory 8 is a temporary storage unit of a video image for temporarily storing image signals and various data related to image signals and the like.
  • the location information storage device 10 is a non-volatile memory for storing location information of a camera mounting point or location information of a camera monitoring area or position information of a point in a camera monitoring area.
  • the position information storage device 10 of the present embodiment is an electrically erasable programmable read only memory (EEPROM).
  • FIG. 2 is a view showing the positional relationship of the camera 100 shown in FIG. 1 when it is placed at a fixed point monitoring place.
  • the camera 100 is mounted to the mounting point P1 at the top of the support bar 20, the lower end of the support bar 20 is deep below the ground plane 21 and fixed to the ground, and the camera monitoring area 22 is approximately a three-dimensional area of oblique taper.
  • the area cut by the plane passing through the direction line 23, the direction line 24 and the center dotted line 25 is a triangular area composed of the direction line 23, the direction line 24 and the ground plane 21, wherein the point P2 is a camera monitor At a point within zone 22, point P2 is generally located in the central zone of camera surveillance zone 22.
  • the position information storage device 10 Before the camera 100 of the present embodiment is mounted on the mounting point P1 of the monitoring place, the position information storage device 10 writes the position information of the camera mounting point P1 and the position information of the point P2 in the camera monitoring area by the program-specific writing device.
  • the position of the mounting point P1 and the position of the point P2 are represented by three-dimensional coordinates such as longitude, latitude and height.
  • the storage interface 9 is a hardware interface for plugging in the location information storage device 10.
  • the location information storage device 10 can be inserted into the storage interface 9 as needed, or can be extracted from the storage interface 9 as needed. For example, after the location information storage device 10 is unplugged from the storage interface 9, it can be easily inserted into a program-specific write device to write specific location information. When the location information storage device 10 is inserted into the storage interface 9, the location information stored in the location information storage device 10 can be read out and transferred to the information adding device 15A of the first CPU 15.
  • the time generating means 12 is a circuit means for generating time information, and the time information generated by the time generating means 12 of the present embodiment can be transmitted to the information adding means 15A of the first CPU 15.
  • the first CPU 15 is a control device mainly used for performing various processes such as image data processing.
  • the first CPU 15 of the present embodiment has a function circuit such as the information adding device 15A.
  • the information adding device 15A is a circuit device that performs the function of reading the position information stored in the position information storage device 10 or receiving other information, and adding its position information and other information to the image signal to form the position information and the like. Image signal of information.
  • the information adding device 15A of the present embodiment adds the position information of the camera mounting point P1 stored in the position information storage device 10, the position information of the point P2 in the camera monitoring area, and the time information generated by the time generating device to the image signal.
  • an image signal having position information and time information of the mounting point P1 and the point P2 is formed.
  • the user can easily determine the specific time when the camera captures the video image, the specific location where the camera is located, and the approximate location of the monitored location or monitored object displayed in the image, as well as for quick analysis and search for specific
  • the image or image content is provided for convenience.
  • the second CPU 16 is provided as a main CPU, and the second CPU 16 is a control device for collectively controlling the respective circuits of the video camera 100 of the present embodiment.
  • the program memory 11 is a nonvolatile memory for storing processing programs executed by the first CPU 15 and the second CPU 16, and inherent data of the camera itself and the like.
  • the program memory 11 may employ a storage device such as an erasable programmable read only memory (EPROM) or a flash erase read only programmer (Flash ROM).
  • EPROM erasable programmable read only memory
  • Flash ROM flash erase read only programmer
  • the output/input interface 13 is used for output of a video signal and input of a control signal or the like.
  • the power source 14 is used to supply power to various circuits of the camera 100.
  • the power source 14 converts the alternating current from the public power grid into a direct current suitable for use by the camera 100.
  • Fig. 3 is a flow chart showing the processing steps of the first CPU 15 of the embodiment shown in Fig. 1.
  • step S1 the video signal processing circuit 5 is controlled to perform compression processing on the video image, and compresses the video image obtained by the image pickup device.
  • step S2 the position information and the time information are added, and the position information of the mounting point P1 of the camera stored in the position storage device 10, the position information of the point P2 in the camera monitoring area, and the time generating means 12 are generated. Time information is added to the compressed video image.
  • step S3 the video image to which the position information and the time information are added is stored in the image memory 8, and then returns to step S1.

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Abstract

为了使定点监控使用的摄像机能低成本地形成具有位置信息的视频图像，提供了一种适用于定点监控的摄像机，它包括：摄像装置，用于生成视频图像；位置信息存储装置，为非易失性存储器并存储有摄像机监控区的位置信息或摄像机监控区内至少一个点的位置信息；信息添加装置，用于将位置信息存储装置所存储的位置信息添加到视频图像中。

Description

适用于定点监控的摄像机 技术领域
本发明涉及摄像机，特别涉及一种能形成具有位置信息的视频图像的摄像机。
背景技术
GPS全球卫星定位系统能在全球范围内进行实时定位和导航。2008年3月26日在公开号为CN101150663A、申请号为CN200710152819.X的中国专利文献(以下简称为参考文献1)中公开了一种具有GPS装置的摄像设备，该种摄像设备利用GPS装置将所测出的位置信息附加在所拍摄的图像中。利用这种摄像设备在再现已拍摄的图像时，参照由GPS装置所测出的位置信息能知道图像的拍摄地点，并且能根据拍摄地点检索出所需的已拍摄的图像。
另外，2010年6月9日在公开号为CN101729765A、申请号为200810170565.9的中国专利文献中公开了另一种具有GPS装置的摄像设备，该种摄像设备利用GPS装置能将被摄物所处的位置信息附加到所拍摄的图像中，能让使用者知道所拍摄的被摄物所处的位置，这为后期被摄物的检索和分析带来了方便。
利用GPS装置获取相关位置的摄像设备，由于配置了GPS装置，增加了摄像设备的复杂性和造价；另外在室内环境下，GPS装置无法正常工作，其提供的位置信息可能是不正确的。
目前在安全防范领域，大量使用摄像机进行定点监控。如何使定点监控使用的摄像机能形成具有位置信息的视频图像并具有较低的造价，已成为人们渴望解决的技术问题。
发明内容
本发明的目的是要提供一种适用于定点监控的摄像机，该种摄像机能形成具有相关位置信息的视频图像并具有较低的造价。
为了达到上述目的，本发明采用的技术方案为：一种适用于定点监控的摄像机，所述摄像机包括：摄像装置，用于对监控场所或监控对象进行拍摄来生成视频图像；其特征在于，所述摄像机还包括：位置信息存储装置，位置信息存储装置为非易失性存储器并存储有摄像机安装点的位置信息；信息添加装置，用于将位置信息存储装置所存储的摄像机安装点的位置信息添加到视频图像中。
使用摄像机进行定点监控时，其监控点位通常是预先规划或设定的，其摄像机安装点的位置可以预先确定。通常，摄像机安装点的准确位置可以通过各种定位设备预先测定或测量。
本发明装置将摄像机安装点的位置信息存储到位置信息存储装置中，并用信息添加装置将摄像机安装点的位置信息添加到视频图像中，可形成具有摄像机安装点位置信息的视频图像。由于摄像机安装点的位置实际上就是摄像机所处的位置，这样用户可以在所拍摄的视频图像中知道其视频图像的拍摄地点，也可以根据拍摄地点快速找到相关的视频图像，有利于后期的快速检索和分析。
相对于现有的具有GPS装置的摄像机，由于本发明装置本身不具有GPS装置，因而其结构相对简单，有利于提高摄像机的可靠性；另外，本发明装置使用位置信息存储装置来存储相关的位置信息，而位置信息存储装置的成本相对GPS装置的成本要低，有利于降低摄像机的造价；还有，本发明装置形成在视频图像中的位置信息相对准确，不会像具有GPS装置的摄像设备那样由于建筑物的阻挡使GPS装置不能正常工作，导致所提供的位置信息出现较大的误差。
在优选的实施例中，位置信息存储装置不仅存储有摄像机安装点的位置信息，还存储有摄像机监控区的位置信息，信息添加装置将位置信息存储装置所存储的摄像机安装点的位置信息和摄像机监控区的位置信息都添加到视频图像中。这样，摄像机所形成的具有位置信息的视频图像中，不仅具有摄像机安装点的位置信息，而且还具有摄像机监控区域的位置信息，用户可以在所拍摄的视频图像中知道拍摄用的摄像机所处的地点和在视频图像中出现的监控场所或监控对象的大致地点，也可以根据摄像机所处的地点或出现的监控场所或监控对象的大致地点快速找到相关的视频图像，这有利于视频图像的快速检索和分析，也有利于将视频图像作为证据使用。
这里所说的摄像机监控区是指摄像机所能拍摄到视频图像的区域。一般情况下，定点监控对位置的精确要求不高，所以摄像机监控区的位置通常可以用摄像机监控区内某个点的位置来代表，也可以用摄像机监控区内几个点的位置来代表。
优选地，位置信息存储装置不仅存储有摄像机安装点的位置信息，还存储有摄像机监控区内至少一个点的位置信息，信息添加装置将位置信息存储装置所存储的摄像机安装点的位置信息和摄像机监控区内的点的位置信息都添加到视频图像中。由于摄像机监控区内的点的位置通常能代表摄像机监控区的大致位置，这样，用户可以在所拍摄的视频图像中知道拍摄视频图像的摄像机所处的地点和在视频图像中所出现的监控场所或监控对象的大致地点，也可以根据摄像机所处的地点或出现监控场所或监控对象的大致地点快速找到相关的视频图像。
优选地，位置信息存储装置所存储的位置信息是在摄像机监控工作前存入的。通常， 监控场所的摄像机安装点的位置用专用位置测定设备进行测定或从地理管理部门获取，摄像机监控区内所选用的点的位置或摄像机监控区的位置同样可用专用位置测定设备进行测定或用其它方式测定。
位置信息可以用三维坐标来表示，也可以用其它方式来表示。通常可以用经度、纬度和高度来表示一个点的位置信息。这些所选用的点或区域的位置信息通常用专用程序写入装置写入或存入到位置信息存储装置中。位置信息存储装置通常为非易失性存储器，这样所存入的位置信息在断电后不会丢失，并可以随时调用。
在优选的实施例中，摄像机包括存储接口，存储接口用于位置信息存储装置的插接，位置信息存储装置可以通过存储接口向信息添加装置传送位置信息存储装置所存储的位置信息。这样可以方便地将位置信息存储装置从存储接口中拨出，放置到程序专用写入装置上写入或改写特定的位置信息。当位置信息存储装置写入特定的位置信息后又可以方便地插入到存储接口中，以供正常调用。
优选地，摄像机还包括用于生成时间的时间生成装置，信息添加装置还用于将时间生成装置所生成的时间信息添加到视频图像中。这样所形成的视频图像不仅具有相关的位置信息，还具有摄像时的时间信息。用户可以清楚地知道拍摄视频图像的相关地点和时间，非常有利于视频图像相关内容的后续查找和分析或将视频图像作为证据使用。
通常，摄像装置所生成的视频图像需要进行压缩处理。在优选的实施例中，摄像机包括图像压缩装置，其中，摄像装置所生成的视频图像先由图像压缩装置进行压缩处理，再由信息添加装置将位置信息存储装置所存储的位置信息添加到经过压缩处理后的视频图像中。这样添加到视频图像中的位置信息就不需要后续的压缩处理，所添加的位置信息就不容易丢失。
在另一个优选的实施例中，摄像机包括图像压缩装置，其中，信息添加装置先将位置信息存储装置所存储的位置信息添加到摄像装置所生成的视频图像中以形成具有位置信息的视频图像，再由图像压缩装置对具有位置信息的视频图像进行压缩处理。这样先添加到视频图像中的位置信息还需要后续的压缩处理，所添加的位置信息就容易丢失，这时图像压缩装置进行压缩处理的难度就增大。
事实上，图像压缩装置和信息添加装置可以将视频图像进行分段处理。例如将所拍摄的视频图像分成多个小段，一小段可以是一帧图像或多帧图像，图像压缩装置压缩一小段后就由信息添加装置对该小段进行信息添加处理，相当于边压缩、边添加。
利用信息添加装置将位置信息或时间信息添加到视频图像中的方式包括附加和嵌入。 附加和嵌入的方法是大家所公知的。在参考文献1中，就有附加方法的描述；在《信息隐藏概论》一书(电子工业出版社2014年11月出版)中就有嵌入方法的详述。
在优选的实施例中，信息添加装置将存储装置所存储的位置信息附加到视频图像中，其中，附加在视频图像中的位置信息是可见的。这样所摄的视频图像播放时，其位置信息是可见的。
在另一个优选的实施例中，信息添加装置将位置信息存储装置所存储的位置信息嵌入到视频图像中，其中，嵌入在视频图像中的位置信息是非可见的。这样所摄的视频图像播放时，其位置信息是非可见的，但可以用适当的方式检索出相关的位置信息，有利于防止篡改视频图像，以便作为证据使用。
在又一个优选的实施例中，信息添加装置将位置信息存储装置所存储的位置信息嵌入到视频图像中，并将时间生成装置所生成的时间信息附加到所述视频图像中，其中，嵌入在视频图像中的位置信息是非可见的，附加在在视频图像中的时间信息是可见的。
在再一个优选的实施例中，信息添加装置将位置信息存储装置所存储的位置信息和时间生成装置所生成的时间信息都附加到所述视频图像中，其中，附加在视频图像中的位置信息和时间信息都是可见的。
为了便于用户知道摄像机的朝向，位置信息存储装置还可以存储有摄像机的朝向信息，信息添加装置还用于将位置信息存储装置所存储的摄像机的朝向信息添加到视频图像中。
附图说明
图l是本发明的摄像机的一个实施例的方框图。
图2是图1所示的摄像机在定点监控场所设置时的位置关系图。
图3是图1所示的摄像机的第一CPU处理步骤的流程图。
具体实施方式
图1示出了本发明的摄像机的一个实施例的方框图。从图1中可以看到，本实施方式的摄像机100主要由以下部分构成：透镜1、摄像器件2、摄像电路3、模数转换器4、视频信号处理电路5、致动器6、致动器驱动电路7、图像存储器8、存储接口9、位置信息存储装置10、程序存储器11、时间生成装置12、输出/输入接口13、电源14、第一CPU15、第二CPU16等。
透镜1用于形成监控场所或监控对象的光学像，并使监控场所或监控对象成像在摄像器件2的受光面上。
摄像器件2是完成图像分解和光电信号转换的器件，用于接收由透镜1形成的监控场 所或监控对象的光学像，并进行光电转换处理后输出电图像信号。摄像器件2通常采用固态摄像器件，本实施例的摄像器件采用电荷耦合(CCD)器件。
摄像电路3是接收来自摄像器件2的图像信号并对图像信号进行各种模拟信号处理的电路。本实施例的摄像电路3对来自摄像器件2的图像信号进行白平衡和图像灰度校正处理，并将处理过的图像信号传送到模数转换器4内。
模数转换器4是将模拟信号转变为数字信号的电子器件。本实施例的模数转换器4用于接收来自摄像电路3的模拟形式的图像信号并将其转换成数字形式的图像信号。
致动器6是用于驱动透镜1来进行自动对焦或变焦的驱动源。
致动器驱动电路7是根据第二CPU16的控制指令来控制并驱动致动器6工作的电路。
在本实施方式的摄像机100中，上述的透镜1、摄像器件2、摄像电路3、模数转换器4、致动器6、致动器驱动电路7等构成了摄像机100对监控场所或监控对象进行摄像并生成视频图像的摄像装置的主要部分。
视频信号处理电路5是接收来自模数转换器4的数字图像信号并进行各种数字信号处理的电路。视频信号处理电路5具有图像变换功能，将来自模数转换器4的数字图像信号转换成YUV形式(Y:亮度数据；UV:色差数据)的图像格式。
本实施例的视频信号处理电路5还具有图像压缩功能，即具有图像压缩装置的功能，以基于MPEG压缩方法对YUV形式的图像信号进行压缩处理，视频信号处理电路5所输出的图像信号为经过压缩处理的图像信号。
图像存储器8是视频图像的临时存储单元，用于临时存储图像信号以及图像信号有关的各种数据等。
位置信息存储装置10为非易失性存储器，用于存储摄像机安装点的位置信息或摄像机监控区的位置信息或摄像机监控区内的点的位置信息等。本实施例的位置信息存储装置10为电可擦可编程只读存储器(EEPROM)。
图2是图1所示的摄像机100在定点监控场所设置时的位置关系图。在图2中可以看到，摄像机100被安装到支撑杆20顶部的安装点P1上，支撑杆20的下端深入到地平面21以下与地基固定，摄像机监控区22近似为斜锥形的立体区域，该立体区域由通过方向线23、方向线24和中心虚线25的平面所截的区域是一个由方向线23、方向线24和地平面21所构成的三角形区域，其中，点P2为摄像机监控区22内的一个点，点P2大致位于摄像机监控区22的中心区。
本实施例的摄像机100在安装到监控场所的安装点P1上前，位置信息存储装置10用 程序专用写入设备写入摄像机安装点P1的位置信息和摄像机监控区内的点P2的位置信息，其中，安装点P1的位置和点P2的位置都采用经度、纬度和高度这样的三维坐标来表示。
再回到图1，存储接口9为一硬件接口，用于位置信息存储装置10的插接。位置信息存储装置10可以根据需要插入到存储接口9中，也可以根据需要从存储接口9中拔出。例如位置信息存储装置10从存储接口9中拔出后，可以方便地插入到程序专用写入设备上写入特定的位置信息。当位置信息存储装置10插入到存储接口9中时，其存储在位置信息存储装置10中的位置信息就可以被读出并传送到第一CPU15的信息添加装置15A中。
时间生成装置12是用于生成时间信息的电路装置，本实施例的时间生成装置12所生成的时间信息可以被传送到第一CPU15的信息添加装置15A中。
第一CPU15是主要用于进行图像数据处理等各种处理的控制装置。本实施例的第一CPU15具有信息添加装置15A等功能电路。信息添加装置15A是实行如下功能的电路装置：读出存储于位置信息存储装置10中的位置信息或接收其它信息，并将其位置信息和其它信息添加到图像信号中以形成具有位置信息和其它信息的图像信号。
本实施例的信息添加装置15A将位置信息存储装置10中所存储的摄像机安装点P1的位置信息、摄像机监控区内的点P2的位置信息和时间生成装置所生成的时间信息都附加到图像信号中，形成具有安装点P1和点P2的位置信息和时间信息的图像信号。经过信息添加装置15A处理后的视频图像在播放时，其安装点P1和点P2的位置信息以及时间信息在播放的图像中都是可见的。这样利用本发明的摄像机所拍摄的视频图像，用户容易确定摄像机拍摄视频图像的具体时间、摄像机所处的具体位置和图像中显示的监控场所或监控对象的大致位置，也为快速分析和搜索特定的图像或图像内容提供了方便。
第二CPU16配设成主CPU，第二CPU16是用于统一控制本实施例的摄像机100的各电路的控制装置。
程序存储器11为非易失性存储器，用于存储由第一CPU15和第二CPU16执行的处理程序和摄像机本身的固有数据等。程序存储器11可以采用诸如可擦写可编程只读存储器(EPROM)或快速擦写只读编程器(Flash ROM)等存储器件。
输出/输入接口13用于视频信号的输出和有关控制信号的输入等。
电源14用于向摄像机100的各个电路供电。电源14将来自公共电网的交流电转换成适合摄像机100使用的直流电。
图3示出了图1所示的实施例的第一CPU15处理步骤的流程图。
在步骤S1中，控制视频信号处理电路5对视频图像进行压缩处理，对摄像装置所获 取的视频图像进行压缩。
在步骤S2中，对位置信息和时间信息进行添加处理，将位置存储装置10所存储的摄像机的安装点P1的位置信息、摄像机监控区内的点P2的位置信息和时间生成装置12所生成的时间信息都添加到经过压缩处理的视频图像中。
在步骤S3中，将添加了位置信息和时间信息的视频图像存储到图像存储器8中，然后返回到步骤S1。
上面参考附图说明了本发明的优选的实施例，但本发明并不局限于上述实施例。显而易见，本领域的技术人员可以进行各种改变和改进，而不背离由所附权利要求书所限定的本发明的范围。

Claims (10)

  1. 一种适用于定点监控的摄像机，所述摄像机包括：
    摄像装置，用于对监控场所或监控对象进行拍摄来生成视频图像；
    其特征在于，所述摄像机还包括：
    位置信息存储装置，位置信息存储装置为非易失性存储器并存储有摄像机安装点的位置信息；信息添加装置，用于将位置信息存储装置所存储的摄像机安装点的位置信息添加到视频图像中。
  2. 如权利要求1所述的摄像机，其特征在于，所述位置信息存储装置还存储有摄像机监控区的位置信息，信息添加装置还用于将位置信息存储装置所存储的摄像机监控区的位置信息添加到视频图像中。
  3. 如权利要求1所述的摄像机，其特征在于，所述位置信息存储装置还存储有摄像机监控区内至少一个点的位置信息，所述信息添加装置还用于将位置信息存储装置所存储的摄像机监控区内的点的位置信息添加到视频图像中。
  4. 如权利要求1至3之一所述的摄像机，其特征在于，所述位置信息存储装置所存储的位置信息是在摄像机监控工作前存入的。
  5. 如权利要求1至3之一所述的摄像机，其特征在于，所述摄像机还包括存储接口，所述存储接口用于位置信息存储装置的插接，位置信息存储装置可以通过所述存储接口向信息添加装置传送位置信息存储装置所存储的位置信息。
  6. 如权利要求1至3之一所述的摄像机，其特征在于，所述摄像机还包括用于生成时间的时间生成装置，所述信息添加装置还用于将时间生成装置所生成的时间信息添加到视频图像中。
  7. 如权利要求1至3之一所述的摄像机，其特征在于，所述摄像机还包括图像压缩装置，所述图像压缩装置用于对视频图像进行压缩处理，其中，摄像装置所生成的视频图像先由图像压缩装置进行压缩处理，再由信息添加装置将位置信息存储装置所存储的位置信息添加到经过压缩处理后的视频图像中。
  8. 如权利要求1至3之一所述的摄像机，其特征在于，所述摄像机还包括图像压缩装置，所述图像压缩装置用于对视频图像进行压缩处理，其中，信息添加装置先将位置信息存储装置所存储的位置信息添加到摄像装置所生成的视频图像中以形成具有位置信息的视频图像，再由图像压缩装置对具有位置信息的视频图像进行压缩处理。
  9. 如权利要求1至3之一所述的摄像机，其特征在于，所述信息添加装置将位置信息存储装置所存储的位置信息附加到视频图像中，其中，附加在视频图像中的位置信息是可见的。
  10. 如权利要求1至3之一所述的摄像机，其特征在于，所述信息添加装置将位置信息存储 装置所存储的位置信息嵌入到视频图像中，其中，嵌入在视频图像中的位置信息是非可见的。
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