WO2013013449A1 - 放大可视电话图像的方法、终端及可视电话系统 - Google Patents
放大可视电话图像的方法、终端及可视电话系统 Download PDFInfo
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- WO2013013449A1 WO2013013449A1 PCT/CN2011/080856 CN2011080856W WO2013013449A1 WO 2013013449 A1 WO2013013449 A1 WO 2013013449A1 CN 2011080856 W CN2011080856 W CN 2011080856W WO 2013013449 A1 WO2013013449 A1 WO 2013013449A1
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- terminal
- image
- enlarged
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- key frame
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000006835 compression Effects 0.000 claims description 34
- 238000007906 compression Methods 0.000 claims description 34
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000010295 mobile communication Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42203—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/4223—Cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/4728—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for selecting a Region Of Interest [ROI], e.g. for requesting a higher resolution version of a selected region
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
- H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
Definitions
- the present invention relates to videophone image processing technology, and more particularly to a method, terminal and videophone system for amplifying a videophone image. Background technique
- the International Telecommunication Union (ITU) has established a protocol for videophones with a specified code rate of 64 kbps. Therefore, videophones cannot achieve high video resolution. The details of some images may not be visible to the user.
- the technical problem to be solved by the present invention is to provide a method, a terminal and a videophone system for amplifying a videophone image, which can realize a high-fidelity enlarged videophone image.
- a method of amplifying a videophone image for use in a videophone system, the videophone system including a first terminal transmitting a visible image and a second terminal receiving a visual image, the method include:
- the first terminal receives the enlarged image message sent by the second terminal, where the enlarged image message carries the location information of the area to be enlarged and the multiple to be amplified;
- the first terminal acquires an original image, and intercepts an area to be enlarged from the original image according to the location information of the area to be enlarged;
- the first terminal performs image coding on the to-be-magnified area according to the amplification factor, encodes the to-be-magnified area as a key frame, and sends the key frame to the second terminal.
- the location information of the area to be enlarged includes:
- the method further includes: receiving, by the first terminal, a stop enlarged image message sent by the second terminal;
- the first terminal acquires an original image, performs full-scale image encoding on the original image with a first compression ratio, and transmits the encoded data frame to the second terminal.
- the encoding the to-be-magnified area as a key frame includes:
- the first terminal encodes the area to be amplified with a second compression ratio, and the second compression ratio is smaller than the first compression ratio.
- the embodiment of the present invention further provides a terminal, which is applied to a videophone system, and is configured to send a visible image
- the videophone system further includes a peer terminal that receives the visible image
- the terminal includes:
- a message receiving module configured to receive a magnified image message sent by the peer terminal, where the enlarged image message carries location information of the area to be enlarged and a multiple to be amplified
- An intercepting module configured to acquire an original image, and intercept the area to be enlarged from the original image according to the location information of the area to be enlarged;
- a code sending module configured to perform image coding on the to-be-amplified area according to the magnification, encode the to-be-amplified area as a key frame, and send the key frame to the opposite end terminal.
- the message receiving module is further configured to receive a stop magnifying image message sent by the peer terminal;
- the code sending module is further configured to perform full-size image coding on the original image acquired by the intercepting module by using the first compression ratio, and send the encoded data frame to the opposite terminal.
- the code sending module is specifically configured to encode the to-be-amplified area by using a second compression ratio, where the second compression ratio is smaller than the first compression ratio.
- Embodiments of the present invention also provide a method for amplifying a videophone image, which is applied to a videophone system, the videophone system including a first terminal that transmits a visible image and a second terminal that receives a visible image.
- the method includes:
- the second terminal receives, by the second terminal, the location information of the area to be enlarged and the to-be-magnified multiple; the second terminal sends an enlarged image message to the first terminal, where the enlarged image message carries the location information of the area to be enlarged and gain;
- a key frame sent by the first terminal where the key frame is that the first terminal intercepts an area to be enlarged from the original image obtained, and the area to be enlarged is obtained according to the amplification factor.
- the embodiment of the present invention further provides a terminal, which is applied to a videophone system, and is configured to receive a visible image, where the videophone system further includes a peer terminal that sends a visible image, where the terminal includes:
- An input module configured to receive location information of a to-be-amplified area input by a user, and a multiplier to be amplified;
- a sending module configured to send, to the peer terminal, an enlarged image message, where the enlarged image is cancelled The information carries the location information and the magnification of the area to be enlarged;
- An image receiving module configured to receive a key frame sent by the peer terminal, where the key frame is after the peer terminal intercepts the to-be-amplified area from the acquired original image, and the to-be-amplified according to the amplification factor The data frame obtained by image coding in the area.
- Embodiments of the present invention also provide a videophone system, the videophone system including a first terminal that transmits a visible image and a second terminal that receives a visible image.
- the first terminal is configured to receive the enlarged image message sent by the second terminal, where the enlarged image message carries the location information of the area to be enlarged and the multiple to be enlarged, acquires the original image, and according to the location of the to-be-magnified area Extracting an area to be enlarged from the original image, performing image coding on the area to be enlarged according to the magnification, encoding the area to be enlarged into a key frame, and transmitting the key frame to the first Second terminal
- the second terminal is configured to receive location information of the area to be enlarged and a multiplier to be enlarged, and send an enlarged image message to the first terminal, where the enlarged image message carries location information and a magnification of the area to be enlarged, Receiving, by the first terminal, a key frame sent by the first terminal, where the first terminal intercepts the to-be-magnified area from the acquired original image, and performs image coding on the to-be-magnified area according to the amplification factor. Data Frame.
- the terminal user selects the image details of a certain area that he wants to see, and feeds the relevant information to the transmitting terminal, and the transmitting end terminal amplifies the original image, thereby avoiding the loss of the image information after the compression.
- the image details are preserved to the utmost extent, and the video image can be enlarged with high fidelity, which can provide a clearer video picture, so that the receiving end user can see the details of the image desired.
- FIG. 1 is a schematic flowchart of a method for amplifying a videophone image according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a terminal according to an embodiment of the present invention
- FIG. 3 is another schematic flowchart of a method for enlarging a videophone image according to an embodiment of the present invention
- FIG. 4 is another schematic structural diagram of a terminal according to an embodiment of the present invention
- FIG. 5 is still another schematic flowchart of a method for enlarging a videophone image according to an embodiment of the present invention. detailed description
- the technical problems, the technical solutions, and the advantages of the embodiments of the present invention will become more apparent from the following detailed description.
- the end user may still be unable to see the details of the image, provide a method of amplifying the videophone image, the terminal and the videophone system, and enable high fidelity to magnify the videophone image.
- FIG. 1 is a schematic flow chart of a method for enlarging a videophone image according to an embodiment of the present invention.
- the method for enlarging a videophone image in this embodiment is applied to a videophone system, and the videophone system includes a first method for transmitting a visible image.
- the terminal and the second terminal receiving the visible image, as shown in FIG. 1, the method for amplifying the videophone image of the embodiment includes:
- Step 101 The first terminal receives the enlarged image message sent by the second terminal, where the enlarged image message carries the location information of the area to be enlarged and the multiple to be amplified;
- Step 102 The first terminal acquires an original image, and intercepts an area to be enlarged from the original image according to the location information of the area to be enlarged;
- Step 103 The first terminal performs image coding on the area to be enlarged according to the magnification, encodes the area to be enlarged into a key frame, and sends the key frame to the second terminal.
- the position information of the area to be enlarged includes the starting point coordinate and the ending point coordinate of the diagonal of the area to be enlarged; or the center point coordinate and radius of the area to be enlarged; or the relative position of the area to be enlarged in the full size image.
- the first terminal receives the stop enlarged image message sent by the second terminal, the first terminal acquires the original image, performs full-size image encoding on the original image with the first compression ratio, and sends the encoded data frame.
- the first terminal uses the second compression ratio
- the enlarged area is encoded, and the second compression ratio is smaller than the first compression ratio.
- the terminal user selects the image details of a certain area that he wants to see, and feeds the related information to the transmitting terminal, and the transmitting terminal enlarges the original image, thereby avoiding After compression, the loss of image information is enlarged, and the details of the image are preserved to the utmost, so that the video image can be enlarged with high fidelity, and a clearer video picture can be provided, so that the receiving end user can see the details of the image desired to be seen.
- FIG. 2 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- the terminal in this embodiment is applied to a videophone system for transmitting a visible image, and the videophone system further includes a peer terminal that receives the visible image, as shown in the figure.
- the terminal in this embodiment includes:
- the message receiving module 20 is configured to receive the enlarged image message sent by the peer terminal, where the enlarged image message carries the location information of the area to be enlarged and the multiple to be amplified;
- the intercepting module 22 is configured to acquire an original image, and intercept the area to be enlarged from the original image according to the position information of the area to be enlarged;
- the code sending module 24 is configured to perform image coding on the area to be enlarged according to the magnification, encode the area to be amplified into a key frame, and send the key frame to the opposite terminal.
- the message receiving module 20 is further configured to receive the stop-enlarged image message sent by the peer terminal; the code sending module 24 is further configured to perform full-scale image encoding on the original image acquired by the intercepting module 22 by using the first compression ratio, and The encoded data frame is sent to the peer terminal.
- the code transmitting module 20 is specifically configured to perform encoding using a second compression ratio, which is smaller than the first compression ratio.
- FIG. 3 is another schematic flowchart of a method for enlarging a videophone image according to an embodiment of the present invention.
- the method for enlarging a videophone image in the embodiment is applied to a videophone system, and the videophone system includes transmitting a visible image.
- the first terminal and the second terminal receiving the visible image, as shown in FIG. 3, the method for enlarging the videophone image of the embodiment includes:
- Step 301 The second terminal receives the location information of the area to be enlarged and the to-be-magnified multiple input by the user.
- Step 302 The second terminal sends an enlarged image message to the first terminal, where the enlarged image message carries the location information and the magnification of the area to be enlarged;
- Step 303 The second terminal receives the key frame sent by the first terminal, where the key frame is a data frame obtained by performing image coding on the enlarged area according to the magnification after the first terminal intercepts the area to be enlarged from the obtained original image.
- the terminal user selects the image details of a certain area that he wants to see, and feeds the related information to the transmitting terminal, and the transmitting terminal enlarges the original image, thereby avoiding After compression, the loss of image information is enlarged, and the details of the image are preserved to the utmost, so that the video image can be enlarged with high fidelity, and a clearer video picture can be provided, so that the receiving end user can see the details of the image desired to be seen.
- FIG. 4 is another schematic structural diagram of a terminal according to an embodiment of the present invention.
- the terminal in this embodiment is applied to a videophone system for receiving a visible image, and the videophone system further includes a peer terminal for transmitting a visible image.
- the terminal in this embodiment includes:
- the input module 40 is configured to receive position information of the area to be enlarged input by the user and a magnification to be amplified;
- the sending module 42 is configured to send a magnified image message to the peer terminal, and the magnified image message carries the position information and the magnification of the area to be enlarged;
- the image receiving module 44 is configured to receive a key frame sent by the peer terminal, where the key frame is a point where the peer terminal intercepts the to-be-amplified area from the acquired original image, and the area to be enlarged according to the magnification A data frame obtained by image encoding.
- the terminal user selects the image details of a certain area that he wants to see, and feeds the related information to the transmitting terminal, and the transmitting terminal enlarges the original image, thereby avoiding the image information after the compression is enlarged.
- the loss which preserves the details of the image to the maximum, can make the video image high fidelity, can provide a clearer video picture, so that the receiving end user can see the details of the image that he wants to see.
- An embodiment of the present invention further provides a videophone system, where the videophone system includes a first terminal that transmits a visible image and a second terminal that receives a visible image, where
- the first terminal is configured to receive the enlarged image message sent by the second terminal, where the enlarged image message carries the position information of the area to be enlarged and the multiple to be enlarged, acquires the original image, and intercepts the original image according to the position information of the area to be enlarged. Enlarging the area, performing image encoding on the enlarged area according to the magnification, encoding the area to be amplified into a key frame, and transmitting the key frame to the second terminal;
- the second terminal is configured to receive the location information of the to-be-amplified area and the to-be-magnified multiple, and send the enlarged image message to the first terminal, where the enlarged image message carries the location information and the amplification factor of the area to be amplified, and receives the sent by the first terminal.
- the key frame is a data frame obtained by performing image coding on the enlarged area according to the magnification after the first terminal intercepts the area to be enlarged from the acquired original image.
- the terminal user selects the image details of a certain area that he wants to see, and feeds the relevant information to the transmitting terminal, and the transmitting terminal enlarges the original image to avoid amplification after compression.
- the loss of image information, the image details are preserved to the utmost, and the video image can be enlarged with high fidelity, which can provide a clearer video picture, so that the receiving end user can see the details of the image desired.
- Step 501 The mobile terminal A and the mobile terminal B establish a link, and the two parties perform a video call; the mobile terminal A dials the mobile terminal B, and establishes a link through the 3G network, and the two use
- the H.263 protocol performs video encoding, and the resolution of the transmitted image is 176 X 144. Both parties can see the other party's video and can make a call;
- Step 502 The mobile terminal B user selects to open the function of zooming in the opposite end, and notifies the mobile terminal A;
- the user of the mobile terminal B opens the menu, and the menu has the option "turn on the image enlargement function", the user selects to turn on the image enlargement function, and the mobile terminal B sends a message to the mobile terminal A to notify the mobile terminal A to turn on the image enlargement function.
- the information exchange can be performed by using a dual tone multi-frequency (DTMF, Dual Tone Multi Frequency) to send a password.
- DTMF Dual Tone Multi Frequency
- the cipher code rules are agreed upon: 101. Indicates that the user turns on the image enlargement function; 102, which means the user turns off the image enlargement function; 201, which represents the upper left quarter of the image; 202, which represents the upper right quarter of the image; 203, which represents the lower left of the image.
- the mobile terminal B may send the DTMF password 101 to the mobile terminal A, and informs that it is ready to open the image enlargement function;
- Step 503 The mobile terminal B user selects an area to be enlarged, and inputs or selects a multiple to be enlarged;
- the user can directly slide or click on the screen to select the area to be enlarged, and the mobile terminal records the coordinates, length and width of the area to be enlarged.
- the coordinate information recorded above is the relative coordinate, that is, the aspect ratio of the coordinate position relative to the image.
- the center point of a picture is recorded as (1/2W, 1/2H), where W and H are respectively The maximum width and maximum height of the image.
- Step 504 the mobile terminal B sends the location information of the area to be enlarged and the multiple to be amplified by the user to the mobile terminal A;
- the mobile terminal B sends the DTMF passwords 201, 301 to the mobile terminal A;
- Step 505 After receiving the information, the mobile terminal A obtains a high resolution original image from the camera;
- the mobile terminal A After receiving the DTMF password, the mobile terminal A obtains a high-resolution original image from the camera, assuming that the camera of the mobile terminal A is 300,000 pixels, and the original image resolution obtained is 640 480;
- Step 506 The mobile terminal A performs a cropping and scaling process on the original image according to the received location information of the area to be enlarged and the multiple to be enlarged.
- the mobile terminal A intercepts the image of the upper left 320 X 240 resolution of the original image with a resolution of 640 480 according to the received DTMF password 201, 301;
- Step 507 The mobile terminal A performs image coding on the intercepted area to be enlarged to obtain a key frame.
- the mobile terminal A extracts the captured image of 320 x 240 resolution and extracts it according to H.263 protocol encoding, generating a pair of 176 144 resolution key frames with a lower compression ratio, and then stopping encoding;
- Step 508 the mobile terminal A sends the key frame to the mobile terminal B;
- the mobile terminal A repeats the above steps 505 to 508 to send the key frame to the mobile terminal B;
- Step 509 The mobile terminal B user selects to turn off the image enlargement function, and the mobile terminal B notifies the mobile terminal A;
- the mobile terminal B user opens the menu, selects "close image enlargement function", and the mobile terminal B sends the password 102 to the mobile terminal A;
- Step 510 The mobile terminal A obtains an original image from the camera, and performs full size encoding on the original image.
- the mobile terminal A re-acquires the original image from the camera, does not perform the enlargement process, performs full-size coding, and the generated first frame image is a key frame, and the compression ratio used in the full-size encoding is larger than the compression used in the encoding of the enlarged region. Ratio
- Step 511 The mobile terminal A stops transmitting the enlarged image and starts to send the full-size image.
- the mobile terminal A stops transmitting the enlarged image to the mobile terminal B, and transmits the unmagnified image to the mobile terminal B.
- the embodiment of the present invention allows the mobile terminal user to select the image details of a certain area that he wants to see, and feeds the relevant information to the mobile terminal at the transmitting end, and the mobile terminal at the transmitting end enlarges the original data collected from the camera. It avoids the loss of image information after compression, and preserves the details of the image to the maximum extent. It can make the video image high-fidelity enlargement, and can provide a clearer video picture, so that the receiving end user can see the image that he wants to see. detail.
- an identified executable code module can comprise one or more physical or logical blocks of computer instructions, which can be constructed, for example, as an object, procedure, or function. Nonetheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different bits. When these instructions are logically combined, they form a module and implement the specifications of the module. purpose.
- the executable code module can be a single instruction or a plurality of instructions, and can even be distributed over a plurality of different code segments, distributed among different programs, and distributed across multiple memory devices.
- operational data can be identified within the module and can be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.
- the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software. Without considering the cost, a person skilled in the art can construct a corresponding hardware circuit to implement the corresponding function.
- the hardware circuit includes a conventional Very Large Scale Integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors, or other discrete components.
- VLSI Very Large Scale Integration
- Modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.
- sequence numbers of the steps are not used to limit the sequence of the steps.
- the steps of the steps are changed without any creative work. It is also within the scope of the invention.
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Abstract
本发明提供一种放大可视电话图像的方法、终端及可视电话系统，属于移动通信领域。其中，该放大可视电话图像的方法，应用于可视电话系统中，所述可视电话系统包括发送可视图像的第一终端和接收可视图像的第二终端，所述方法包括：所述第一终端接收所述第二终端发送的放大图像消息，所述放大图像消息中携带有待放大区域的位置信息和待放大倍数；所述第一终端获取原始图像，并根据所述待放大区域的位置信息从所述原始图像中截取出待放大区域；所述第一终端根据所述放大倍数对所述待放大区域进行图像编码，将所述待放大区域编码为关键帧，并将所述关键帧发送至所述第二终端。本发明的技术方案能够实现高保真的放大可视电话图像。
Description
放大可视电话图像的方法、 终端及可视电话系统 技术领域
本发明涉及可视电话图像处理技术， 特别是指一种放大可视电话图像 的方法、 终端及可视电话系统。 背景技术
随着第三代移动通信（3G, 3rd Generation ) 时代的到来， 移动可视电 话已经开始步入普通百姓的生活。 它是一种集图像、 话音于一体的多媒体 通信业务， 可以让人们面对面的实时沟通， 实现人们通话时既闻其声、 又 见其人的梦想。
但受通信带宽和资源的限制， 国际电信联盟 （ ITU , International Telecommunication Union ) 在制定可视电话的相关协议时， 规定码率为 64kbps,可视电话因此无法达到很高的视频分辨率，这就造成用户可能无法 看清某些图像的细节。
目前在对可视电话图像进行放大时， 釆用的是对图像进行裁剪插值处 理以达到放大图像的目的。 但由于发送端移动终端在发送原视频数据之前 进行了图像抽取、 编码压缩， 已经有大量的信息丟失， 此时接收端移动终 端再对接收到的数据进行裁剪插值处理， 势必会增加信息损耗， 使得接收 端用户可能仍然无法看清图像细节。 发明内容
本发明要解决的技术问题是提供一种放大可视电话图像的方法、 终端 及可视电话系统， 能够实现高保真的放大可视电话图像。
为解决上述技术问题， 本发明的实施例提供技术方案如下：
一方面， 提供一种放大可视电话图像的方法， 应用于可视电话系统中， 所述可视电话系统包括发送可视图像的第一终端和接收可视图像的第二终 端， 所述方法包括：
所述第一终端接收所述第二终端发送的放大图像消息， 所述放大图像 消息中携带有待放大区域的位置信息和待放大倍数；
所述第一终端获取原始图像， 并根据所述待放大区域的位置信息从所 述原始图像中截取出待放大区域；
所述第一终端根据所述放大倍数对所述待放大区域进行图像编码， 将 所述待放大区域编码为关键帧， 并将所述关键帧发送至所述第二终端。
其中， 所述待放大区域的位置信息包括：
待放大区域的对角线的起始点坐标和结束点坐标； 或
待放大区域的中心点坐标和半径； 或
待放大区域在全尺寸图像中的相对位置。
其中， 所述并将所述关键帧发送至所述第二终端之后还包括： 所述第一终端接收所述第二终端发送的停止放大图像消息；
所述第一终端获取原始图像， 釆用第一压缩比对所述原始图像进行全 尺寸的图像编码， 并将编码得到的数据帧发送至所述第二终端。
其中， 所述将所述待放大区域编码为关键帧包括：
所述第一终端釆用第二压缩比对所述待放大区域进行编码， 所述第二 压缩比小于所述第一压缩比。
本发明实施例还提供了一种终端， 应用于可视电话系统中， 用于发送 可视图像， 所述可视电话系统还包括接收可视图像的对端终端， 所述终端 包括：
消息接收模块， 用于接收对端终端发送的放大图像消息， 所述放大图 像消息中携带有待放大区域的位置信息和待放大倍数；
截取模块， 用于获取原始图像， 并根据所述待放大区域的位置信息从 所述原始图像中截取出待放大区域；
编码发送模块， 用于根据所述放大倍数对所述待放大区域进行图像编 码， 将所述待放大区域编码为关键帧， 并将所述关键帧发送至所述对端终 端。
其中， 所述消息接收模块还用于接收所述对端终端发送的停止放大图 像消息；
所述编码发送模块还用于釆用第一压缩比对所述截取模块获取的原始 图像进行全尺寸的图像编码， 并将编码得到的数据帧发送至所述对端终端。
其中， 所述编码发送模块具体用于釆用第二压缩比对所述待放大区域 进行编码， 所述第二压缩比小于所述第一压缩比。
本发明实施例还提供了一种放大可视电话图像的方法， 应用于可视电 话系统中， 所述可视电话系统包括发送可视图像的第一终端和接收可视图 像的第二终端， 所述方法包括：
所述第二终端接收用户输入的待放大区域的位置信息和待放大倍数； 所述第二终端向所述第一终端发送放大图像消息， 所述放大图像消息 中携带有待放大区域的位置信息和放大倍数；
所述第二终端接收所述第一终端发送的关键帧， 所述关键帧为所述第 一终端从获取的原始图像中截取出待放大区域后， 根据所述放大倍数对所 述待放大区域进行图像编码得到的数据帧。
本发明实施例还提供了一种终端， 应用于可视电话系统中， 用于接收 可视图像， 所述可视电话系统还包括发送可视图像的对端终端， 所述终端 包括：
输入模块， 用于接收用户输入的待放大区域的位置信息和待放大倍数； 发送模块， 用于向所述对端终端发送放大图像消息， 所述放大图像消
息中携带有待放大区域的位置信息和放大倍数；
图像接收模块， 用于接收所述对端终端发送的关键帧， 所述关键帧为 所述对端终端从获取的原始图像中截取出待放大区域后， 根据所述放大倍 数对所述待放大区域进行图像编码得到的数据帧。
本发明实施例还提供了一种可视电话系统， 所述可视电话系统包括发 送可视图像的第一终端和接收可视图像的第二终端，
所述第一终端用于接收所述第二终端发送的放大图像消息， 所述放大 图像消息中携带有待放大区域的位置信息和待放大倍数， 获取原始图像， 并根据所述待放大区域的位置信息从所述原始图像中截取出待放大区域， 根据所述放大倍数对所述待放大区域进行图像编码， 将所述待放大区域编 码为关键帧， 并将所述关键帧发送至所述第二终端；
所述第二终端用于接收用户输入的待放大区域的位置信息和待放大倍 数， 向所述第一终端发送放大图像消息， 所述放大图像消息中携带有待放 大区域的位置信息和放大倍数， 接收所述第一终端发送的关键帧， 所述关 键帧为所述第一终端从获取的原始图像中截取出待放大区域后， 根据所述 放大倍数对所述待放大区域进行图像编码得到的数据帧。
本发明的实施例具有以下有益效果：
上述方案中， 终端用户选择想要看到的某一区域的图像细节， 并将相 关信息反馈到发送端终端， 由发送端终端对原始图像进行放大处理， 避免 了压缩后放大对图像信息的损耗， 最大限度地保留了图像的细节信息， 可 以使视频图像高保真地放大， 能够提供更清晰的视频画面， 使接收端用户 看清所想要看到图像细节。 附图说明
图 1为本发明实施例的放大可视电话图像的方法的流程示意图； 图 2为本发明实施例的终端的结构示意图；
图 3为本发明实施例的放大可视电话图像的方法的另一流程示意图； 图 4为本发明实施例的终端的另一结构示意图；
图 5为本发明实施例的放大可视电话图像的方法的再一流程示意图。 具体实施方式
为使本发明的实施例要解决的技术问题、 技术方案和优点更加清楚， 下面将结合附图及具体实施例进行详细描述。 端用户可能仍然无法看清图像细节的问题， 提供一种放大可视电话图像的 方法、 终端及可视电话系统， 能够实现高保真的放大可视电话图像。
图 1 为本发明实施例的放大可视电话图像的方法的流程示意图， 本实 施例的放大可视电话图像的方法应用于可视电话系统中， 可视电话系统包 括发送可视图像的第一终端和接收可视图像的第二终端， 如图 1 所示， 本 实施例的放大可视电话图像的方法包括：
步骤 101: 第一终端接收第二终端发送的放大图像消息，放大图像消息 中携带有待放大区域的位置信息和待放大倍数；
步骤 102: 第一终端获取原始图像， 并根据待放大区域的位置信息从原 始图像中截取出待放大区域；
步骤 103: 第一终端根据放大倍数对待放大区域进行图像编码， 将待放 大区域编码为关键帧， 并将关键帧发送至第二终端。
其中， 待放大区域的位置信息包括待放大区域的对角线的起始点坐标 和结束点坐标； 或待放大区域的中心点坐标和半径； 或待放大区域在全尺 寸图像中的相对位置。
之后， 若第一终端接收到第二终端发送的停止放大图像消息， 则第一 终端获取原始图像， 釆用第一压缩比对原始图像进行全尺寸的图像编码， 并将编码得到的数据帧发送至第二终端。 其中， 第一终端釆用第二压缩比
对待放大区域进行编码 , 第二压缩比小于第一压缩比。
本实施例的放大可视电话图像的方法， 终端用户选择想要看到的某一 区域的图像细节， 并将相关信息反馈到发送端终端， 由发送端终端对原始 图像进行放大处理， 避免了压缩后放大对图像信息的损耗， 最大限度地保 留了图像的细节信息， 可以使视频图像高保真地放大， 能够提供更清晰的 视频画面， 使接收端用户看清所想要看到图像细节。
图 2为本发明实施例的终端的结构示意图， 本实施例的终端应用于可 视电话系统中， 用于发送可视图像， 可视电话系统还包括接收可视图像的 对端终端， 如图 2所示， 本实施例的终端包括：
消息接收模块 20, 用于接收对端终端发送的放大图像消息， 放大图像 消息中携带有待放大区域的位置信息和待放大倍数；
截取模块 22, 用于获取原始图像， 并根据待放大区域的位置信息从原 始图像中截取出待放大区域；
编码发送模块 24, 用于根据放大倍数对待放大区域进行图像编码， 将 待放大区域编码为关键帧， 并将关键帧发送至对端终端。
其中，消息接收模块 20还用于接收对端终端发送的停止放大图像消息； 编码发送模块 24还用于釆用第一压缩比对截取模块 22获取的原始图 像进行全尺寸的图像编码， 并将编码得到的数据帧发送至对端终端。
在对待放大区域进行编码时， 编码发送模块 20具体用于釆用第二压缩 比进行编码， 该第二压缩比小于第一压缩比。
本实施例的终端， 终端用户选择想要看到的某一区域的图像细节， 并 将相关信息反馈到发送端终端， 由发送端终端对原始图像进行放大处理， 避免了压缩后放大对图像信息的损耗， 最大限度地保留了图像的细节信息， 可以使视频图像高保真地放大， 能够提供更清晰的视频画面， 使接收端用 户看清所想要看到图像细节。
图 3 为本发明实施例的放大可视电话图像的方法的另一流程示意图， 本实施例的放大可视电话图像的方法应用于可视电话系统中， 可视电话系 统包括发送可视图像的第一终端和接收可视图像的第二终端， 如图 3所示， 本实施例的放大可视电话图像的方法包括：
步骤 301 :第二终端接收用户输入的待放大区域的位置信息和待放大倍 数；
步骤 302: 第二终端向第一终端发送放大图像消息，放大图像消息中携 带有待放大区域的位置信息和放大倍数；
步骤 303: 第二终端接收第一终端发送的关键帧， 关键帧为第一终端从 获取的原始图像中截取出待放大区域后， 根据放大倍数对待放大区域进行 图像编码得到的数据帧。
本实施例的放大可视电话图像的方法， 终端用户选择想要看到的某一 区域的图像细节， 并将相关信息反馈到发送端终端， 由发送端终端对原始 图像进行放大处理， 避免了压缩后放大对图像信息的损耗， 最大限度地保 留了图像的细节信息， 可以使视频图像高保真地放大， 能够提供更清晰的 视频画面， 使接收端用户看清所想要看到图像细节。
图 4为本发明实施例的终端的另一结构示意图， 本实施例的终端应用 于可视电话系统中， 用于接收可视图像， 可视电话系统还包括发送可视图 像的对端终端， 如图 4所示， 本实施例的终端包括：
输入模块 40, 用于接收用户输入的待放大区域的位置信息和待放大倍 数；
发送模块 42, 用于向对端终端发送放大图像消息， 放大图像消息中携 带有待放大区域的位置信息和放大倍数；
图像接收模块 44, 用于接收对端终端发送的关键帧， 关键帧为对端终 端从获取的原始图像中截取出待放大区域后， 根据放大倍数对待放大区域
进行图像编码得到的数据帧。
本实施例的终端， 终端用户选择想要看到的某一区域的图像细节， 并 将相关信息反馈到发送端终端， 由发送端终端对原始图像进行放大处理， 避免了压缩后放大对图像信息的损耗， 最大限度地保留了图像的细节信息， 可以使视频图像高保真地放大， 能够提供更清晰的视频画面， 使接收端用 户看清所想要看到图像细节。
本发明实施例还提供了一种可视电话系统， 可视电话系统包括发送可 视图像的第一终端和接收可视图像的第二终端， 其中，
第一终端用于接收第二终端发送的放大图像消息， 放大图像消息中携 带有待放大区域的位置信息和待放大倍数， 获取原始图像， 并根据待放大 区域的位置信息从原始图像中截取出待放大区域， 根据放大倍数对待放大 区域进行图像编码， 将待放大区域编码为关键帧， 并将关键帧发送至第二 终端；
第二终端用于接收用户输入的待放大区域的位置信息和待放大倍数， 向第一终端发送放大图像消息， 放大图像消息中携带有待放大区域的位置 信息和放大倍数， 接收第一终端发送的关键帧， 关键帧为第一终端从获取 的原始图像中截取出待放大区域后， 根据放大倍数对待放大区域进行图像 编码得到的数据帧。
本实施例的可视电话系统， 终端用户选择想要看到的某一区域的图像 细节， 并将相关信息反馈到发送端终端， 由发送端终端对原始图像进行放 大处理， 避免了压缩后放大对图像信息的损耗， 最大限度地保留了图像的 细节信息， 可以使视频图像高保真地放大， 能够提供更清晰的视频画面， 使接收端用户看清所想要看到图像细节。
下面以 3G网络中的可视电话系统为例，结合附图 5中具体的步骤对本 发明的放大可视电话图像的方法进行进一步介绍：
步骤 501、 移动终端 A和移动终端 B建立链接， 双方进行可视通话； 移动终端 A向移动终端 B拨号， 并通过 3G网络建立链接， 两者使用
H.263协议进行视频编码， 发送图像的分辨率都是 176 X 144, 双方可以看 到对方视频且能进行通话；
步骤 502、 移动终端 B用户选择打开放大对端图像功能， 并通知移动 终端 A;
移动终端 B的用户打开菜单， 菜单中有选项 "开启图像放大功能"， 用 户选择开启图像放大功能， 移动终端 B向移动终端 A发送消息通知移动终 端 A打开图像放大功能。
在拨打移动终端过程中移动终端 A和移动终端 B之间需要进行信息交 互， 信息交互的方式可以有短消息、 语音识别等多种方式。 考虑到简单和 实时性， 在本实施例中， 可以釆用双音多频 （DTMF, Dual Tone Multi Frequency )发送密码的方式进行信息交互， 首先对密码编译码规则进行约 定， 分别为： 101 , 表示用户开启图像放大功能； 102, 表示用户关闭图像 放大功能； 201 , 表示图像的左上方四分之一区域； 202, 表示图像的右上 方四分之一区域； 203 , 表示图像的左下方四分之一区域； 204, 表示图像 的右下方四分之一区域； 301 , 表示放大倍数为 4倍； 302, 表示放大倍数 为 16倍； 这些配置规可以预先存储在移动终端的存储器中。
本实施例中， 移动终端 B可以向移动终端 A发送 DTMF密码 101 , 通 知其准备打开图像放大功能；
步骤 503、 移动终端 B用户选择待放大区域， 并输入或选择待放大倍 数；
用户选择待放大区域时， 可以有以下方式：
( 1 )直接输入坐标方式，例如输入待放大区域的对角线起始点坐标（ sx, sy )和结束点坐标（ ex, ey ); 或输入起始点坐标 ( sx, sy )和区域长覔 ( dx,
dy ); 还可以输入中心点坐标， 然后通过内置默认或由用户输入的半径， 来 确定待放大区或。
( 2 )对于触摸屏手机， 用户可以直接在屏幕上滑动或者点击来选择待 放大区域， 由移动终端记录待放大区域的坐标以及长宽等信息。
需要注意的是， 以上记录的坐标信息为相对坐标， 即坐标位置相对于 图像的长宽比， 例如一副图片的中心点记录成（ 1/2W, 1/2H ), 其中 W和 H分别是图像的最大宽度和最大高度。
( 3 )将图像划分成各个小区域， 通过左、 右、 上、 中、 下等来表示待 放大区域， 或者直接用数字对各个区域进行标识；
步骤 504、 移动终端 B将用户选定的待放大区域的位置信息和待放大 倍数发送给移动终端 A;
假设用户选择的是左上方区域放大 4倍， 本实施例中， 移动终端 B发 送 DTMF密码 201、 301到移动终端 A;
步骤 505、 移动终端 A收到信息后， 从摄像头获取高分辨率的原始图 像；
移动终端 A收到 DTMF密码后， 从摄像头获取到一副高分辨率的原始 图像，假设移动终端 A的摄像头是 30万像素的， 获取的原始图像分辨率为 640 480;
步骤 506、 移动终端 A根据接收到的待放大区域的位置信息和待放大 倍数对原始图像进行裁剪、 缩放处理；
移动终端 A根据接收到的 DTMF密码 201、 301 , 截取分辨率为 640 480的原始图像的左上方 320 X 240分辨率的图像；
步骤 507、 移动终端 A对截取的待放大区域进行图像编码， 得到一关 键帧；
移动终端 A将截取过后的 320 x 240分辨率的图像再进行抽取，并根据
H.263协议编码， 釆用较低的压缩比生成一副 176 144分辨率的关键帧， 随后停止编码；
步骤 508、 移动终端 A将关键帧发送至移动终端 B;
之后在用户 B用户关闭图像放大功能之前， 移动终端 A重复上述步骤 505至步骤 508, 将关键帧发送至移动终端 B;
步骤 509、 移动终端 B用户选择关闭图像放大功能， 移动终端 B通知 移动终端 A;
移动终端 B用户打开菜单， 选择 "关闭图像放大功能"， 移动终端 B发 送密码 102到移动终端 A;
步骤 510、 移动终端 A从摄像头获取原始图像， 对原始图像进行全尺 寸编码；
移动终端 A重新从摄像头获取原始图像， 不做放大处理， 进行全尺寸 编码， 生成的第一帧图像为关键帧， 在全尺寸编码时釆用的压缩比大于对 待放大区域编码时釆用的压缩比；
步骤 511、 移动终端 A停止发送放大图像， 开始发送全尺寸图像。 移动终端 A停止向移动终端 B发送放大图像， 向移动终端 B发送未经 放大的图像。
若移动终端用户挂断电话， 则结束可视会话。
本发明实施例让移动终端用户选择想要看到的某一区域的图像细节， 并将相关信息反馈到发送端移动终端， 由发送端移动终端对从摄像头釆集 到的原始数据进行放大处理， 避免了压缩后放大对图像信息的损耗， 最大 限度的保留了图像的细节信息， 可以使视频图像高保真的放大， 能够提供 更清晰的视频画面， 使接收端用户看清所想要看到图像细节。
此说明书中所描述的许多功能部件都被称为模块， 以便更加特别地强 调其实现方式的独立性。
本发明实施例中， 模块可以用软件实现， 以便由各种类型的处理器执 行。 举例来说， 一个标识的可执行代码模块可以包括计算机指令的一个或 多个物理或者逻辑块， 举例来说， 其可以被构建为对象、 过程或函数。 尽 管如此， 所标识模块的可执行代码无需物理地位于一起， 而是可以包括存 储在不同位里上的不同的指令， 当这些指令逻辑上结合在一起时， 其构成 模块并且实现该模块的规定目的。
实际上， 可执行代码模块可以是单条指令或者是许多条指令， 并且甚 至可以分布在多个不同的代码段上， 分布在不同程序当中， 以及跨越多个 存储器设备分布。 同样地， 操作数据可以在模块内被识别， 并且可以依照 任何适当的形式实现并且被组织在任何适当类型的数据结构内。 所述操作 数据可以作为单个数据集被收集， 或者可以分布在不同位置上 （包括在不 同存储设备上）， 并且至少部分地可以仅作为电子信号存在于系统或网络 上。
在模块可以利用软件实现时， 考虑到现有硬件工艺的水平， 所以可以 以软件实现的模块， 在不考虑成本的情况下， 本领域技术人员都可以搭建 对应的硬件电路来实现对应的功能， 所述硬件电路包括常规的超大规模集 成（ VLSI, Very Large Scale Integration )电路或者门阵列以及诸如逻辑芯片、 晶体管之类的现有半导体或者是其它分立的元件。 模块还可以用可编程硬 件设备， 诸如现场可编程门阵列、 可编程阵列逻辑、 可编程逻辑设备等实 现。
在本发明各方法实施例中， 所述各步骤的序号并不能用于限定各步骤 的先后顺序， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提 下， 对各步骤的先后变化也在本发明的保护范围之内。
以上所述是本发明的优选实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明所述原理的前提下， 还可以作出若干改
进和润饰， 这些改进和润饰也应视为本发明的保护范围。
Claims
1. 一种放大可视电话图像的方法， 应用于可视电话系统中， 所述可视 电话系统包括发送可视图像的第一终端和接收可视图像的第二终端， 其特 征在于， 所述方法包括：
所述第一终端接收所述第二终端发送的放大图像消息， 所述放大图像 消息中携带有待放大区域的位置信息和待放大倍数；
所述第一终端获取原始图像， 并根据所述待放大区域的位置信息从所 述原始图像中截取出待放大区域；
所述第一终端根据所述放大倍数对所述待放大区域进行图像编码， 将 所述待放大区域编码为关键帧， 并将所述关键帧发送至所述第二终端。
2. 根据权利要求 1所述的放大可视电话图像的方法， 其特征在于， 所 述待放大区域的位置信息包括：
待放大区域的对角线的起始点坐标和结束点坐标； 或
待放大区域的中心点坐标和半径； 或
待放大区域在全尺寸图像中的相对位置。
3. 根据权利要求 1所述的放大可视电话图像的方法， 其特征在于， 所 述并将所述关键帧发送至所述第二终端之后还包括：
所述第一终端接收所述第二终端发送的停止放大图像消息；
所述第一终端获取原始图像， 釆用第一压缩比对所述原始图像进行全 尺寸的图像编码， 并将编码得到的数据帧发送至所述第二终端。
4. 根据权利要求 3所述的放大可视电话图像的方法， 其特征在于， 所 述将所述待放大区域编码为关键帧包括：
所述第一终端釆用第二压缩比对所述待放大区域进行编码， 所述第二 压缩比小于所述第一压缩比。
5. 一种终端， 应用于可视电话系统中， 用于发送可视图像， 所述可视 电话系统还包括接收可视图像的对端终端， 其特征在于， 所述终端包括： 消息接收模块， 用于接收对端终端发送的放大图像消息， 所述放大图 像消息中携带有待放大区域的位置信息和待放大倍数；
截取模块， 用于获取原始图像， 并根据所述待放大区域的位置信息从 所述原始图像中截取出待放大区域；
编码发送模块， 用于根据所述放大倍数对所述待放大区域进行图像编 码， 将所述待放大区域编码为关键帧， 并将所述关键帧发送至所述对端终 端。
6. 根据权利要求 5所述的终端， 其特征在于，
所述消息接收模块还用于接收所述对端终端发送的停止放大图像消 息；
所述编码发送模块还用于釆用第一压缩比对所述截取模块获取的原始 图像进行全尺寸的图像编码， 并将编码得到的数据帧发送至所述对端终端。
7. 根据权利要求 6所述的终端， 其特征在于， 所述编码发送模块具体 用于釆用第二压缩比对所述待放大区域进行编码， 所述第二压缩比小于所 述第一压缩比。
8. 一种放大可视电话图像的方法， 应用于可视电话系统中， 所述可视 电话系统包括发送可视图像的第一终端和接收可视图像的第二终端， 其特 征在于， 所述方法包括：
所述第二终端接收用户输入的待放大区域的位置信息和待放大倍数； 所述第二终端向所述第一终端发送放大图像消息， 所述放大图像消息 中携带有待放大区域的位置信息和放大倍数；
所述第二终端接收所述第一终端发送的关键帧， 所述关键帧为所述第 一终端从获取的原始图像中截取出待放大区域后， 根据所述放大倍数对所 述待放大区域进行图像编码得到的数据帧。
9. 一种终端， 应用于可视电话系统中， 用于接收可视图像， 所述可视 电话系统还包括发送可视图像的对端终端， 其特征在于， 所述终端包括： 输入模块， 用于接收用户输入的待放大区域的位置信息和待放大倍数； 发送模块， 用于向所述对端终端发送放大图像消息， 所述放大图像消 息中携带有待放大区域的位置信息和放大倍数；
图像接收模块， 用于接收所述对端终端发送的关键帧， 所述关键帧为 所述对端终端从获取的原始图像中截取出待放大区域后， 根据所述放大倍 数对所述待放大区域进行图像编码得到的数据帧。
10. 一种可视电话系统， 所述可视电话系统包括发送可视图像的第一 终端和接收可视图像的第二终端， 其特征在于，
所述第一终端用于接收所述第二终端发送的放大图像消息， 所述放大 图像消息中携带有待放大区域的位置信息和待放大倍数， 获取原始图像， 并根据所述待放大区域的位置信息从所述原始图像中截取出待放大区域， 根据所述放大倍数对所述待放大区域进行图像编码， 将所述待放大区域编 码为关键帧， 并将所述关键帧发送至所述第二终端；
所述第二终端用于接收用户输入的待放大区域的位置信息和待放大倍 数， 向所述第一终端发送放大图像消息， 所述放大图像消息中携带有待放 大区域的位置信息和放大倍数， 接收所述第一终端发送的关键帧， 所述关 键帧为所述第一终端从获取的原始图像中截取出待放大区域后， 根据所述 放大倍数对所述待放大区域进行图像编码得到的数据帧。
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| CN104469275B (zh) * | 2013-09-23 | 2019-01-25 | 杭州海康威视数字技术股份有限公司 | 一种视频图像获取方法、系统和装置 |
| CN103824252A (zh) * | 2014-02-10 | 2014-05-28 | 安徽科大讯飞信息科技股份有限公司 | 图片处理方法及系统 |
| CN105468206B (zh) * | 2014-09-04 | 2022-04-22 | 华为技术有限公司 | 交互演示方法和设备 |
| WO2016119217A1 (zh) * | 2015-01-30 | 2016-08-04 | 华为技术有限公司 | 视频通信中放大视频图像的方法和终端 |
| CN107547790A (zh) * | 2016-06-27 | 2018-01-05 | 中兴通讯股份有限公司 | 图像采集的处理方法、装置及系统 |
| CN111105523A (zh) * | 2020-01-08 | 2020-05-05 | 深圳市亮彩瀚达科技有限公司 | 可用于行车记录仪的可移动式回放画面系统及方法 |
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