WO2006069509A1 - Procede de capture de donnees video au moyen d'un telephone cellulaire-appareil photo d'un ordinateur - Google Patents

Procede de capture de donnees video au moyen d'un telephone cellulaire-appareil photo d'un ordinateur Download PDF

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Publication number
WO2006069509A1
WO2006069509A1 PCT/CN2005/001074 CN2005001074W WO2006069509A1 WO 2006069509 A1 WO2006069509 A1 WO 2006069509A1 CN 2005001074 W CN2005001074 W CN 2005001074W WO 2006069509 A1 WO2006069509 A1 WO 2006069509A1
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WO
WIPO (PCT)
Prior art keywords
video data
computer
function
camera
mobile phone
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PCT/CN2005/001074
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English (en)
French (fr)
Inventor
Lian Xu
Xiangdong Liu
Chao Xu
Wu Zheng
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Lenovo (Beijing) Limited
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Application filed by Lenovo (Beijing) Limited filed Critical Lenovo (Beijing) Limited
Priority to US11/722,947 priority Critical patent/US20080151058A1/en
Priority to JP2007548670A priority patent/JP2008526143A/ja
Priority to KR1020077014065A priority patent/KR100890236B1/ko
Publication of WO2006069509A1 publication Critical patent/WO2006069509A1/zh

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/002Specific input/output arrangements not covered by G06F3/01 - G06F3/16
    • G06F3/005Input arrangements through a video camera
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00Digital computers in general; Data processing equipment in general
    • G06F15/16Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00307Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a mobile telephone apparatus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/66Remote control of cameras or camera parts, e.g. by remote control devices
    • H04N23/661Transmitting camera control signals through networks, e.g. control via the Internet
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0034Details of the connection, e.g. connector, interface
    • H04N2201/0048Type of connection
    • H04N2201/0055By radio
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0074Arrangements for the control of a still picture apparatus by the connected apparatus

Definitions

  • the present invention relates to the field of computer application technologies, and in particular, to a method for acquiring video data using a camera phone as a computer camera. Background technique
  • the camera can be used to obtain images in real time, so that the computer can realize video chat and video conference, and real-time monitoring of the surrounding environment can be realized on the computer through the camera.
  • the camera acts as a separate video capture device that needs to be plugged into the USB interface of the computer via a USB cable, thereby enabling the computer to capture video images from the camera. Therefore, the camera needs to separately occupy a USB interface of the computer, thereby making the already limited interface resources more tense; in addition, since the connection between the computer and the camera must be realized through the USB cable, the actual application is realized by using the camera device. At the same time, the USB cable must be carried along with the camera, which increases the requirements for the video capture device and imposes certain restrictions on the connection; again, the camera acts as a separate hardware device and requires the user to purchase it separately, thereby increasing the user's The actual cost is not conducive to the rapid promotion of various computer practical applications of camera equipment.
  • the main object of the present invention is to provide a method for acquiring video data by using a camera phone as a computer camera, thereby enabling the use of the mobile phone as a video capture device to acquire video data and transmitting the data to the computer through wireless communication, thereby saving the computer.
  • Interface resources reduce the requirements on the video capture device and the restrictions on the connection, save the user's actual overhead; and, can make the camera work
  • the ability of the mobile phone to break through the capacity limit enables better video data acquisition operations.
  • the present invention provides a method for acquiring video data using a camera phone as a computer camera, the method comprising:
  • Step A virtualizing the camera phone into a video capture device in the computer
  • Step B selecting the mobile phone that has been virtualized as the video capture device in step A as the current video capture device of the computer;
  • Step C The computer sends a command for acquiring video data to the mobile phone as the current video capture device, and the mobile phone acquires the video data according to the received command and transmits the data to the computer through the wireless connection;
  • Step D The computer receives the video data transmitted by the mobile phone.
  • step A includes:
  • Step A1 Setting a virtual camera driver, the driver includes at least: a function function for registering the camera device, a function function for setting and reading the property of the camera device, and a device for implementing the adding/unloading of the camera device.
  • Function function function function for obtaining video data from a mobile phone;
  • Step A2 Run the virtual driver described in step A1, register the camera function phone with the operating system using the function provided in the program, and set the attributes supported by the camera function phone.
  • the virtual driver is a video micro port driver, and the micro port driver provides a callback routine for a video class driver; wherein the video class driver encapsulates general features of different types of stream devices, and provides application control and Operate the video capture device.
  • setting the attributes supported by the mobile phone in step A2 includes: calling a function function for setting the property of the camera device, setting the image resolution, image format, image compression format, video for the mobile phone The encoding format, and/or the frequency at which video data is captured.
  • step B includes:
  • the function function for implementing the adding camera device is invoked, the mobile phone corresponding to the virtual driver is added to the computer, and then the mobile phone is selected by the application as the current video capturing device of the computer.
  • Step C includes: Step C1: the application of the computer sends a command to obtain a video data to the virtual driver through the operating system, and invokes the function function for reading the property of the camera device, and the attribute supported by the mobile phone Reading a specific attribute as a device attribute for obtaining current video data;
  • Step C2 The virtual driver converts the command to acquire video data into a corresponding control command for the mobile phone according to the read device attribute of the current video data, and then, through wireless communication between the computer and the mobile phone, Sending the converted command to the mobile phone; where the control command embodies the device attribute of acquiring the current video data;
  • Step C3 The mobile phone performs an operation of acquiring video data according to the received control command.
  • the method further includes: separately assigning a separate memory block to each of the video capture devices, and the virtual driver transmitting the video data to the application in step C4 includes:
  • the virtual driver saves the video data stored in the independent memory block to the application through the virtual device's own read device routine.
  • the method further comprises: performing a transformation including a format and/or a size on the format of the video data.
  • step D further includes: compressing the video data to be transmitted, and then transmitting the compressed video data to the computer; step D further comprising: receiving the received video by the computer The compressed video data is restored to the original video data.
  • step D further comprises: the application in the computer playing or saving the video data by using the received video data as a data source.
  • the application is a video chat application or a web conferencing application.
  • the method further comprises:
  • the function function for implementing the unloading camera device is invoked, and the mobile phone corresponding to the virtual driver is uninstalled from the computer.
  • the video data acquired by the mobile phone can be transmitted to the computer through wireless communication between the mobile phone and the computer, thereby saving port resources of the computer;
  • the use of a mobile phone as a camera device can save the expense of purchasing a dedicated camera device.
  • the mobile phone is more convenient to use than a dedicated camera, and does not require a USB cable to connect the mobile phone and the computer.
  • the wireless communication method can realize the transmission of video data, thereby making the connection method more free;
  • FIG. 2 is a block diagram of an embodiment of the present invention.
  • the present invention relates to a method for acquiring video data by using a camera phone as a computer camera.
  • the method virtualizes a camera with a camera function as a camera device to a computer, and sets an attribute related to acquiring video data to the phone, and then, Selecting the registered mobile phone as a camera device, using the virtual result and the related attributes of the settings, controlling and operating the mobile phone for video acquisition operation, and transmitting the acquired video data to the computer through wireless communication, and the computer processes the data.
  • the received video data is saved or displayed, thereby implementing the function of the virtual camera device through the mobile phone, so as to complete the corresponding operation.
  • Step 101 virtualizing the camera function phone into a video capture device in the computer
  • Step 102 Select, as the current video capture device of the computer, the mobile phone that has been virtualized as the video capture device in step 101;
  • Step 103 The computer sends a command for acquiring video data to the mobile phone as the current video capture device, and the mobile phone acquires the video data according to the received command and transmits the data to the computer through the wireless connection;
  • Step 104 The computer receives the video data from the mobile phone, and provides the video data as a data source to the application for saving or playing.
  • FIG. 2 is a block diagram showing a specific structure of a camera using a camera function phone.
  • an application program on the computer side, an application program, an operating system, and a virtual camera driver are generally included in the embodiment.
  • the virtual camera driver is used to provide various functions and operations related to the camera device to the operating system.
  • the virtual camera driver registers with the operating system and completes the setting of the properties of the camera device, thereby implementing the camera function.
  • Mobile phone virtual becomes a camera device
  • the application selects the mobile phone that has been virtualized as the camera device as the current camera device through the operating system, and then uses the various operation functions provided by the virtual camera driver to send corresponding control to the mobile phone side through the wireless communication module.
  • a command to control the acquisition of video data by the mobile phone and also use the operation function provided by the virtual camera driver to receive video data from the mobile phone side through the wireless communication module, and perform compression, format conversion on the video data, for example.
  • the wireless communication module, the control operation module and the camera phone device itself are usually included, and the two-way communication with the computer is realized through the wireless communication module, thereby receiving the control command sent by the computer and sending the mobile phone to the computer.
  • the acquired video data; the control operation module is configured to control the operation of acquiring the video data by the camera phone according to the received control command, and the camera phone is used to actually acquire the video data.
  • Step 301 Set a virtual camera driver, where the driver includes at least: a function function for registering the camera device, a function function for setting and reading the property of the camera device, and a function for adding/unloading the camera device.
  • Function function function function for obtaining video data from a mobile phone;
  • various video capture devices are streaming devices, and the operating system provides a generic video class driver for these streaming devices, and saves the program in the Stream.sys file in the program.
  • the application program controls and operates the video capture device; and, for each type of video capture device, each has its own specific video microport driver, which is the class described
  • the driver provides callback routines to implement the characterization of the respective types of video capture devices. Therefore, in the embodiment of the present invention, only a micro port driver is designed for the camera functioning mobile phone, and the function function of the above is implemented in the program, so that the setting of the virtual camera driver can be realized;
  • the microport driver includes the following function functions:
  • a driver entry function for registering the video microport driver with a video class driver so that the video class driver can call the microport program, thereby enabling the entry function to call the video microport as a video class driver
  • the entry point of the driver the specific description of the function is:
  • HW_INITIALIZATION_DATA HwInitData is declared; in the HwInitData, the address of the function for processing the request and some parameters related to the hardware are filled in, and then the video class driver is called by using HwInitData as a parameter.
  • the StreamClassRegisterAdapter() function registers for its invocation.
  • the driver entry function implements the registration function by filling in the address of the function that handles the request in HwInitData and some parameters related to the hardware, and then calling the StreamClassRegisterAdapterG function of the video class driver.
  • the device attribute setting function is used to set an attribute supported by the video capturing device during initialization;
  • the device attribute reading function is used according to the need when acquiring video data. Reading a specific attribute from an attribute supported by the video capture device as an attribute when the video capture device currently acquires video data;
  • the camera device attributes include: image resolution, image format, image compression format, video encoding format, and/or frequency of capturing video data. In other embodiments of the present invention, other attributes may also be included, and Affecting the implementation of the present invention;
  • the video size supported by the device This parameter can be selected from 320X240, 640X480, and 1024X768.
  • the default value is 320X240.
  • parameter 1 represents 8-bit pixels
  • 2 represents 16-bit pixels
  • 3 represents 24-bit pixels.
  • the default value of this parameter is 3;
  • VideoSetFormat the video capture device can be set to: Maximum size is 1024 x 768, the minimum size is 160 x 120, the supported pixel counts are 8bit, 16bits, 24bits; the device property read function is described as - Function Name: VideoGetProperty
  • Input parameters pSrb points to the video request package set by the property, and the result store is returned in this structure.
  • the function VideoSetFormat is used to set the device property, and the corresponding function VideoGetProperty is used to obtain the value range of various device attributes of the device; the function function is to set a value from the value range of various device attributes.
  • the video size supported by the device ranges from 320X240, 640X480, and 1024X768.
  • 320X240 can be used as the parameter.
  • the video size of the current device is 320X240.
  • Video data acquisition function this function is used to control the camera function phone, according to the properties of the currently set video device to obtain video data, obtain video data from the mobile phone, the specific description of the function is: Function name: VideoCaptureRoutine
  • Input parameters pStrmEx points to the extended structure of the video stream
  • Step 302 to step 303 Run the virtual driver described in step 301, register the camera function phone with the operating system, and then set the attributes supported by the camera function phone; in the embodiment of the present invention, by calling DriverEntry during initialization a function, thereby implementing the registration of the video microport program to the video class driver, thereby implementing step 302, by calling the VideoSetFormat function can be implemented step 303;
  • Step 304 using the function function provided by the virtual driver, adding the camera phone corresponding to the virtual driver to the computer, and then the application selects the mobile phone as the current video capture device of the computer; wherein, adding the camera phone
  • the steps can be implemented by calling the Vcamlnit function as described above;
  • Step 305 The application sends a command for acquiring video data to the virtual driver through the operating system, and reads a specific attribute from the attributes supported by the mobile phone as a device attribute for acquiring current video data; wherein, the application can call the above VideoSetProperty Function, setting the device attribute of the current video data;
  • Step 306 After receiving the command to obtain video data sent by the application, the virtual driver converts the command to obtain the video data into a corresponding control command for the mobile phone according to the read device attribute of the current video data, and then, through the computer and Wireless communication between the mobile phones, the converted command is sent to the mobile phone; wherein, the control command reflects the setting result obtained after calling the VideoSetProperty function;
  • Step 307 The control operation module of the mobile phone receives a control command from the computer from its wireless communication module, and performs an operation of acquiring video data according to the command;
  • Step 308 The virtual driver obtains the video data from the mobile phone by using the wireless communication between the computer and the mobile phone.
  • step 308 can be implemented by calling the above VideoCaptureRoutine function;
  • Step 309 The virtual driver calls the read device routine that it has, and transmits the video data acquired from the mobile phone to the upper application for use by the application; wherein, after the virtual driver obtains the video data from the mobile phone, The data is stored in the computer memory.
  • the class driver allocates a separate memory block for each video capture device.
  • the memory block defines 1024 X 768 X 3 + sizeof (BITMAPINFOHEADER).
  • the virtual driver performs the format and/or size of the video data according to the format set by the user and the bitmap format in the memory area. Transforming, and then providing the video data of the appropriate format and/or size to the upper layer application, the upper layer application can play the video data, and the video data can also be saved on the hard disk.
  • the video data may first be compressed into, for example, an MJPEG format, and then the compressed video data is wirelessly transmitted. Communication is transmitted to the computer, thereby saving wireless communication bandwidth consumption, which is beneficial to the specific application of the technology.
  • the computer decompresses the data and restores the original video data.
  • the upper application may be a video chat application or a web conferencing application, and other applications using video data may also be used as the application in the present invention without affecting the implementation of the present invention.
  • the mobile phone as the camera can also be unloaded from the computer by calling a function function for uninstalling the camera device in the virtual driver.

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Description

采用照相手机作为计算机摄像头获取视频数据的方法
技术领域
本发明涉及计算机应用技术领域,尤其涉及一种采用照相手机作为计算机摄 像头获取视频数据的方法。 背景技术
当前, 在采用计算机的各项实际应用中, 摄像头已经被越来越多的应用在诸 多领域之中。 例如, 可以通过摄像头实时获取图像, 从而利用计算机实现视频聊 天以及视频会议, 还可通过摄像头在计算机上实现对周围环境的实时监控。
在现有技术中, 摄像头作为一个单独的视频捕获设备, 需要通过 USB线插 入到计算机的 USB接口中, 从而使得计算机能够从摄像头获取视频图像。 由此, 摄像头需要单独占用计算机的一个 USB接口,从而使得本就十分有限的接口资源 更加紧张; 另外, 由于必须通过 USB线实现计算机与摄像头之间的连接, 从而使 得在利用摄像头设备进行实际应用时, 必须随同摄像头同时携带 USB线, 从而增 加了对视频捕获设备的要求并且对连接造成了一定的限制; 再次, 摄像头作为一 个独立的硬件设备, 需要使用者单独购买, 从而增加了使用者的实际开销, 不利 于迅速推广釆用摄像头设备的各种计算机实际应用。
同时, 手机作为一种通信工具, 其功能也随着通信技术的不断发展而日益丰 富, 不但越来越多的手机能够实现拍照功能, 而且, 一些手机的像素和分辨率已 经越来越高, 甚至超过了普通的计算机摄像头。但是, 由于手机存储卡容量有限, 会限制使用者拍摄视频文件的长度和相片数量, 从而使得手机在作为视频捕获设 备应用时受到一定的容量限制。 发明内容
有鉴于此,本发明的主要目的在于提供一种釆用照相手机作为计算机摄像头 获取视频数据的方法, 从而能够利用手机作为视频捕获设备实现获取视频数据, 并通过无线通信传输给计算机, 从而节省计算机的接口资源, 降低对视频捕获设 备的要求以及对连接的限制, 节省用户的实际开销; 并且, 能够使得具有照相功 能的手机突破容量上的限制, 能够更好地进行视频数据获取操作。
为实现上述目的,本发明提供了一种采用照相手机作为计算机摄像头获取视 频数据的方法, 该方法包括:
步骤 A: 将照相手机虚拟成计算机中的视频捕获设备;
步骤 B:将步骤 A中已经虚拟为视频捕获设备的手机选择作为计算机的当前 视频捕获设备;
步骤 C: 计算机向作为当前视频捕获设备的手机发送获取视频数据命令, 所 述手机根据接收到的命令, 获取视频数据并通过无线连接传输给计算机;
步骤 D: 计算机接收手机传输来的视频数据。
其中, 步骤 A包括:
步骤 A1 : 设置一个虚拟摄像头驱动程序, 该驱动程序中至少包括: 用于进行摄像 头设备注册的功能函数、 用于进行摄像头设备属性设置和读取的功能函数、 用于实现 添加 /卸载摄像头设备的功能函数、 用于从手机获取视频数据的功能函数;
步骤 A2: 运行步骤 A1所述的虚拟驱动程序, 利用该程序中所提供的函数, 向操 作系统注册照相功能手机, 并设置该照相功能手机所支持的属性。
其中, 所述虚拟驱动程序为视频微端口驱动程序, 该微端口驱动程序为视频类驱 动程序提供回调例程; 其中, 视频类驱动程序封装了不同类型流设备的一般特征, 供 应用程序控制和操作视频捕获设备。
其中, 步骤 A2所述设置手机所支持的属性包括- 调用用于进行摄像头设备属性设置的功能函数,.为所述该手机设置所 ^:持的图像 分辨率、 图像格式、 图像压缩格式、 视频编码格式、 和 /或捕获视频数据的频率。
其中, 步骤 B包括:
调用所述用于实现添加摄像头设备的功能函数, 将该虚拟驱动程序所对应的手机 添加到计算机中, 然后, 通过应用程序选择该手机作为计算机的当前视频捕获设备。
其中, 步骤 C包括- 步骤 C1 :计算机的应用程序通过操作系统, 向虚拟驱动程序发送获取视频数据命 令, 和, 调用所述用于进行摄像头设备属性读取的功能函数, 从手机所支持的属性中 读取特定属性作为获取当前视频数据的设备属性;
步骤 C2:虚拟驱动程序根据所读取的获取当前视频数据的设备属性,将获取视频 数据命令转换为对手机的相应控制命令, 然后, 通过计算机与手机之间的无线通信, 将该转换后的命令发送给手机; 其中, 所述控制命令中体现了获取当前视频数据的设 备属性;
步骤 C3: 手机根据接收到的所述控制命令, 执行获取视频数据的操作; 步骤 C4:虚拟驱动程序利用计算机和手机之间的无线通信,通过调用所述用于从 手机获取视频数据的功能函数, 从手机获取视频数据, 并传输给计算机的应用程序。
其中,该方法进一步包括:预先为各个视频捕获设备分别分配一个独立的内存块, 步骤 C4所述虚拟驱动程序将视频数据传输给应用程序包括:
虚拟驱动程序将保存在所述独立内存块中的视频数据, 通过虚拟驱动程序自身具 有的读设备例程, 上传给应用程序。
其中, 虚拟驱动程序将视频数据上传给应用程序之前, 该方法进一步包括: 对视频数据的格式进行包括格式和 /或尺寸在内的变换。
其中, 步骤 c中所述将视频数据传输给计算机之前, 该方法进一步包括: 对待传输的视频数据进行压缩, 然后, 将压缩后的视频数据传输给计算机; 步骤 D进一步包括: 计算机将接收到的压缩视频数据还原为原始的视频数据。 其中, 步骤 D进一步包括- 计算机中的应用程序以所述接收到的视频数据作为数据源, 播放或保存该视频数 据。
其中, 所述应用程序为视频聊天应用程序或网络会议应用程序。
其中, 该方法进一步包括:
调用所述用于实现卸载摄像头设备的功能函数,将该虚拟驱动程序所对应的 手机从计算机中卸载下来。
可见, 本发明具有如下有益效果:
( 1 ) 在本发明中, 可以通过手机和计算机之间的无线通信, 将手机所获取 的视频数据传输给计算机, 从而节省了计算机的端口资源;
( 2) 在本发明中, 采用手机作为摄像头设备, 可以省去购买一个专用的摄 像头设备的费用开销, 另外, 手机也比专用摄像头使用更加方便, 无需必备 USB 线来连接手机和计算机, 通过无线通信方式即可实现视频数据的传输, 从而使得 连接方式更加自由;
( 3 ) 在本发明中, 由于可以将手机所获取的视频数据保存到计算机中, 因 此, 可以弥补手机拍照或摄像时存储卡容量少的不足, 突破手机在进行有关视频 的应用时所受到的容量上的限制。 附图说明
图 1为实现本发明的流程图。
图 2为本发明一实施例的模块结构图。
图 3为本发明一实施例的流程图。 具体实施方式
本发明为一种采用照相手机作为计算机摄像头获取视频数据的方法, 该方法 将具有照相功能的手机虚拟为一个摄像头设备注册到计算机中, 并对该手机设置 与获取视频数据相关的属性, 然后, 选择该已经注册的手机作为摄像头设备, 利 用虚拟的结果以及设置的相关属性, 控制和操作该手机进行视频获取操作, 并将 所获取的视频数据通过无线通信传输给计算机, 计算机对该数据进行处理后, 保 存或显示接收到的视频数据, 从而实现通过手机虚拟摄像头设备功能, 以便完成 相应的操作。
下面结合附图对本发明进行详细描述。
参见图 1, 实现本发明需要以下歩骤:
步骤 101 : 将照相功能手机虚拟成计算机中的视频捕获设备;
步骤 102: 将步骤 101中已经虚拟为视频捕获设备的手机选择作为计算机的 当前视频捕获设备;
步骤 103 : 计算机向作为当前视频捕获设备的手机发送获取视频数据命令, 该手机根据接收到的命令, 获取视频数据并通过无线连接传输给计算机;
步骤 104: 计算机接收来自手机的视频数据, 将该视频数据作为数据源提供 给应用程序保存或播放。
下面结合具体实例, 并参照附图对以上步骤的具体实现进行详细描述。 图 2所示为一实施例中, 采用照相功能手机进行具体应用的模块结构图, 在 该具体应用中, 在计算机一侧, 通常包括应用程序、 操作系统和虚拟摄像头驱动 程序, 在本实施例中, 虚拟摄像头驱动程序用于向操作系统提供与摄像头设备有 关的各种属性和操作, 在初始化时, 该虚拟摄像头驱动程序向操作系统进行注册 并完成摄像头设备的属性设置, 从而实现将照相功能手机虚拟成为摄像头设备, 在实际运行过程中, 应用程序通过操作系统选择已经虚拟为摄像头设备的手机作 为当前摄像头设备, 然后, 利用虚拟摄像头驱动程序所提供的各个操作功能, 通 过无线通信模块向手机一侧发送相应的控制命令, 以实现对手机获取视频数据的 控制, 并且, 还利用虚拟摄像头驱动程序所提供的操作功能, 通过无线通信模块 从手机一侧接收视频数据, 在对该视频数据进行例如压缩、 格式转换的处理之后, 传输给应用程序进行实际应用;
同时, 在拍照功能手机一侧, 通常包括无线通信模块、 控制操作模块和拍照 手机设备本身, 通过无线通信模块实现与计算机之间的双向通信, 从而接收计算 机发送的控制命令, 并向计算机发送手机所获取的视频数据; 控制操作模块用于 根据接收到的控制命令, 控制拍照手机执行获取视频数据的操作, 拍照手机则用 于实际获取视频数据。
下面, 以图 2所示的模块结构为例, 结合一个具体实施例, 说明实现本发明 的具体流程, 参见图 3, 在该具体实施例中, 包括以下步骤:
步骤 301 : 设置一个虚拟摄像头驱动程序, 该驱动程序中至少包括: 用于进 行摄像头设备注册的功能函数、用于进行摄像头设备属性设置和读取的功能函数、 用于实现添加 /卸载摄像头设备的功能函数、 用于从手机获取视频数据的功能函 数;
其中, 在 Windows 操作系统中, 各种视频捕获设备都是流设备, 操作系统 为这些流设备提供了一个通用的视频类驱动程序, 并将该程序保存在 Stream.sys 文件中, 以在该程序中封装这些流设备的一般特征, 供应用程序控制和操作视频 捕获设备; 并且, 针对各个类型的视频捕获设备, 分别具有各自具体的视频微端 口驱动程序, 该微端口驱动程序为所述的类驱动程序提供回调例程, 以实现各自 类型视频捕获设备的特性操作。 因此, 在本发明实施例中, 只需为照相功能的手 机设计一个微端口驱动程序, 并在该程序中包括以上所述的各个功能函数, 即可 实现虚拟摄像头驱动程序的设置; 在本实施例中, 该微端口驱动程序包括如下功 能函数:
( 1 ) 驱动入口函数, 用于向视频类驱动程序注册该视频微端口驱动程序, 以便视频类驱动程序能够调用该微端口程序, 从而, 使得该入口函数能够作为视 频类驱动程序调用视频微端口驱动程序的入口点, 对该函数的具体描述为:
函数名: DriverEntry 输入参数: DriverObject
RegistryPath
输出参数: 返回注册结果。
在该函数中, 申明一个硬件初始化数据结构 HW— INITIALIZATION—DATA HwInitData; 在该 HwInitData中填写有关处理请求的函数的地址和与硬件有关的 一些参数, 然后用 HwInitData 作为参数, 调用视频类驱动程序的 StreamClassRegisterAdapter()函数进行注册, 以便其调用。
说明:驱动入口函数通过填写在 HwInitData中的有关处理请求的函数的地址 和与硬件有关的一些参数,再调用视频类驱动程序的 StreamClassRegisterAdapterG 函数实现注册功能。
( 2 ) 设备属性设置函数和设备属性读取函数, 其中, 设备属性设置函数用 于在初始化时, 设置视频捕获设备所支持的属性; 设备属性读取函数则用于根据 获取视频数据时的需要, 从该视频捕获设备所支持的属性中读取特定的属性, 作 为该视频捕获设备当前获取视频数据时的属性;
其中, 所述的摄像头设备属性包括: 图像分辨率、 图像格式、 图像压缩格式、 视频编码格式、 和 /或捕获视频数据的频率, 在本发明其它实施例中, 也可包括其 它属性, 并不影响本发明的实现;
设备属性设置函数的具体描述为:
函数名: VideoSetFormat
描述: 设置一个视频流的格式, 在流最初被打开时会进行这种操作; 输入参数:
该设备所支持的视频图像宽度;
该设备所支持的视频图像高度;
该设备所支持的视频图像像素字节数;
该设备所支持的视频大小, 该参数可以从 320X240、 640X480、 1024X768中 选择, 默认值为 320X240;
该设备所支持的像素位数, 其中, 利用参数 1代表 8位像素, 2代表 16位像 素, 3代表 24位像素, 该参数的默认值为 3 ;
输出参数: 如果该视频格式可以设置则返回 TRUE, 否则返回 FALSE , 通过该 VideoSetFormat 函数, 可以将该视频捕获 备设置为: 最大尺寸为 1024 x 768, 最小尺寸为 160 x 120,支持的像素位数有 8bit、 16bits、 24bits; 设备属性读取函数的具体描述为- 函数名: VideoGetProperty
描述: 处理视频属性请求的函数
输入参数: pSrb 指向属性设置的视频请求包, 结果存储在这个结 构中返回
输出参数: 成功或失败
其中, 函数 VideoSetFormat 的作用是设置设备属性, 与此对应的函数 VideoGetProperty用于获取设备的各种设备属性的取值范围;设置函数功能是从各 种设备属性的取值范围中设定一个值, 比如该设备所支持的视频大小的取值范围 是 320X240、 640X480、 1024X768, 调用设备函数时可以用 320X240作为参数, 表示当前设备的视频大小这个属性取值为 320X240。
( 3 ) 设备添加和卸载函数, 该函数用于实现将摄像头设备从计算机中添加 和卸载, 该函数具体包括:
函数名: VCamlnit
描述: 在初始化时, 将摄像头设备添加到计算机中;
输入参数: 无
输出: 成功或失败代码
还包括:
函数名: VCamFinish
描述: 从计算机中卸载功能摄像头设备;
输入参数: 无
输出: 成功或失败代码;
(4) 视频数据获取函数, 该函数用于控制照相功能手机, 按照设定的视频 设备当前获取视频数据的属性, 从手机获取视频数据, 该函数的具体描述为: 函数名: VideoCaptureRoutine
描述: 获取一帧图像;
输入参数: pStrmEx 指向视频流的扩展结构;
输出参数: 无。
以上为歩骤 301所述设置一个虚拟摄像头驱动程序的具体实现, 下面重新参 照图 3, 对该具体实施例继续进行介绍:
步骤 302〜步骤 303 : 运行步骤 301所述的虚拟驱动程序, 向操作系统注册照 相功能手机, 然后, 设置该照相功能手机所支持的属性; 在本发明实施例中, 通 过在初始化时, 调用 DriverEntry函数, 从而实现将视频微端口程序注册到视频类 驱动程序, 从而, 可以实现步骤 302, 通过调用 VideoSetFormat函数则可实现步 骤 303;
步骤 304: 利用该虚拟驱动程序所提供的功能函数, 将该虚拟驱动程序所对 应的照相手机添加到计算机中, 然后, 应用程序选择该手机作为计算机的当前视 频捕获设备; 其中, 添加照相手机的步骤可以通过调用如上所述的 Vcamlnit函数 实现;
步骤 305 : 应用程序通过操作系统, 向虚拟驱动程序发送获取视频数据命令, 并且, 从手机所支持的属性中读取特定属性作为获取当前视频数据的设备属性; 其中, 应用程序可以通过调用上述 VideoSetProperty函数, 设置当前视频数据 的设备属性;
步骤 306: 虚拟驱动程序收到应用程序发出的获取视频数据命令后, 根据所 读取的获取当前视频数据的设备属性, 将获取视频数据命令转换为对手机的相应 控制命令, 然后, 通过计算机与手机之间的无线通信, 将该转换后的命令发送给 手机; 其中, 该控制命令中体现了调用 VideoSetProperty 函数后所得到的设置结 果;
步骤 307: 手机的控制操作模块从其无线通信模块接收到来自计算机的控制 命令, 根据该命令, 执行获取视频数据的操作;
步骤 308: 虚拟驱动程序利用计算机和手机之间的无线通信, 从手机获取视 频数据; 在本发明实施例中, 通过调用上述 VideoCaptureRoutine函数即可实现步 骤 308;
步骤 309: 虚拟驱动程序调用自身具有的读设备例程, 将从手机所获取的视 频数据传送给上层应用程序, 以供该应用程序使用; 其中, 虚拟驱动程序从手机 获得视频数据后, 会将该数据存放在计算机内存中, 为了存放从手机一侧传过来 的视频数据, 由类驱动程序为每个视频捕获设备分配一个独立的内存块, 该内存 块定义 1024 X 768 X 3 + sizeof(BITMAPINFOHEADER) 大小的字节数组, 由此可 以使得各个视频捕获设备分别具有各自独立的内存单元; 来自手机的视频数据将 连同位图信息和位图数据一起拷贝入该内存区, 虚拟驱动程序根据用户所要求的 釆集格式和该内存区中的位图格式, 对该视频数据进行包括格式和 /或尺寸在内的 变换, 然后将该适当格式和 /或尺寸的视频数据提供给上层应用程序使用, 上层应 用程序可以播放该视频数据, 也可将该视频数据保存在硬盘中。
以上所述为本发明的一个具体实施例, 其中, 在视频数据从手机通过无线通 信传输到计算机的过程中,还可以先将视频数据压缩为例如 MJPEG格式,然后再 将压缩的视频数据通过无线通信传输给计算机, 从而节省无线通信带宽消耗, 有 利于该技术的具体应用, 计算机接收到压缩的视频数据后, 对该数据进行解压缩, 恢复为原始的视频数据。
在本发明中, 上层应用程序可以为视频聊天应用程序或网络会议的应用程 序, 其它使用视频数据的应用程序也可以作为本发明中的应用程序, 并不影响本 发明的实现。
在本发明实施例中, 在应用程序执行完毕之后, 还可以通过调用虚拟驱动程 序中的用于卸载摄像头设备的功能函数, 将作为摄像头的手机从计算机上卸载下 来。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本发明 的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的 保护范围之内。

Claims

权 利 要 求
1、一种采用照相手机作为计算机摄像头获取视频数据的方法,其特征在于,该方 法包括:
步骤 A: 将照相手机虚拟成计算机中的视频捕获设备;
步骤 B:将步骤 A中已经虚拟为视频捕获设备的手机选择作为计算机的当前 视频捕获设备;
步骤 C: 计算机向作为当前视频捕获设备的手机发送获取视频数据命令, 所 述手机根据接收到的命令, 获取视频数据并通过无线连接传输给计算机;
步骤 D: 计算机接收手机传输来的视频数据。
2、 根据权利要求 1所述的方法, 其特征在于, 步骤 A包括:
步骤 A1 : 设置一个虚拟摄像头驱动程序, 该驱动程序中至少包括:用于进行摄像 头设备注册的功能函数、 用于进行摄像头设备属性设置和读取的功能函数、 用于实现 添加 /卸载摄像头设备的功能函数、 用于从手机获取视频数据的功能函数;
步骤 A2: 运行步骤 A1所述的虚拟驱动程序, 利用该程序中所提供的函数, 向操 作系统注册照相功能手机, 并设置该照相功能手机所支持的属性。
3、根据权利要求 2所述的方法,其特征在于,所述虚拟驱动程序为视频微端口驱 动程序, 该微端口驱动程序为视频类驱动程序提供回调例程; 其中, 视频类驱动程序 封装了不同类型流设备的一般特征, 供应用程序控制和操作视频捕获设备。
4、 根据权利要求 2所述的方法, 其特征在于, 步骤 A2所述设置手机所支持的属 性包括:
调用用于进行摄像头设备属性设置的功能函数, 为所述该手机设置所支持的图像 分辨率、 图像格式、 图像压缩格式、 视频编码格式、 和 /或捕获视频数据的频率。
5、 根据权利要求 2所述的方法, 其特征在于, 步骤 B包括:
调用所述用于实现添加摄像头设备的功能函数, 将该虚拟驱动程序所对应的手机 添加到计算机中, 然后, 通过应用程序选择该手机作为计算机的当前视频捕获设备。
6、 根据权利要求 2所述的方法, 其特征在于, 步骤 C包括:
步骤 C1 :计算机的应用程序通过操作系统, 向虚拟驱动程序发送获取视频数据命 令, 和, 调用所述用于进行摄 ί象头设备属性读取的功能函数, 从手机所支持的属性中 读取特定属性作为获取当前视频数据的设备属性;
步骤 C2:虚拟驱动程序根据所读取的获取当前视频数据的设备属性,将获取视频 数据命令转换为对手机的相应控制命令, 然后, 通过计算机与手机之间的无线通信, 将该转换后的命令发送给手机; 其中, 所述控制命令中体现了获取当前视频数据的设 备属性;
步骤 C3 : 手机根据接收到的所述控制命令, 执行获取视频数据的操作; 步骤 C4:虚拟驱动程序利用计算机和手机之间的无线通信,通过调用所述用于从 手机获取视频数据的功能函数, 从手机获取视频数据, 并传输给计算机的应用程序。
7、根据权利要求 6所述的方法, 其特征在于, 该方法进一步包括: 预先为各个视 频捕获设备分别分配一个独立的内存块, 步骤 C4中所述虚拟驱动程序将视频数据传 输给应用程序包括:
虚拟驱动程序将保存在所述独立内存块中的视频数据, 通过虚拟驱动程序自身具 有的读设备例程, 上传给应用程序。 .
8、根据权利要求 7所述的方法,其特征在于,虛拟驱动程序将视频数据上传给应 用程序之前, 该方法进一步包括:
对视频数据的格式进行包括格式和 /或尺寸在内的变换。
9、 根据权利要求 1所述的方法, 其特征在于, 步骤 C中所述将视频数据传输给 计算机之前, 该方法进一步包括:
对待传输的视频数据进行压缩, 然后, 将压缩后的视频数据传输给计算机; 步骤 D进一步包括: 计算机将接收到的压缩视频数据还原为原始的视频数据。
10、 根据权利要求 1所述的方法, 其特征在于, 步骤 D进一步包括:
计算机中的应用程序以所述接收到的视频数据作为数据源, 播放或保存该视频数 据。
11、根据权利要求 10所述的方法,其特征在于, 所述应用程序为视频聊天应用程 序或网络会议应用程序。
12、根据权利要求 2所述的方法,其特征在于,步骤 D之后,该方法进一步包括: 调用所述用于实现卸载摄像头设备的功能函数, 将该虚拟驱动程序所对应的手机 从计算机中卸载下来。
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