CN111212310B - Image display method and device - Google Patents
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- CN111212310B CN111212310B CN202010056420.7A CN202010056420A CN111212310B CN 111212310 B CN111212310 B CN 111212310B CN 202010056420 A CN202010056420 A CN 202010056420A CN 111212310 B CN111212310 B CN 111212310B
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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
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
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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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
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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, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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, rendering scenes according to MPEG-4 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
- H04N21/440272—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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 for performing aspect ratio conversion
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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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/4508—Management of client data or end-user data
- H04N21/4516—Management of client data or end-user data involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention provides an image display method and device, wherein the method comprises the following steps: step 1, a first terminal and a second terminal establish connection according to a preset interconnection protocol; step 2, the first terminal obtains the resolution of a display screen of the first terminal; step 3, the first terminal calculates a corresponding image frame according to the resolution of the display screen of the first terminal and the resolution supported and output by the second terminal, and registers the image frame and the resolution of the display screen of the first terminal to the second terminal; step 4, the second terminal judges whether the second terminal supports outputting the image with the matched resolution corresponding to the resolution registered by the first terminal, if yes, the second terminal outputs the image after adding the corresponding image frame on the image with the matched resolution, and if not, the second terminal outputs the image after adding the corresponding image frame on the image with the default resolution; and 5, the first terminal processes and displays the image which is output by the second terminal and added with the image frame. The invention realizes the undistorted display of images with any resolution.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to an image display method and apparatus.
Background
Generally, the resolution of a display screen of a vehicle-mounted information system is a fixed value, and the common resolutions include 800X480, 960X540, 1024X600, 1280X720, 1280X800, 1920X1080 and the like. At present, when images with the same resolution are displayed on display screens of vehicle-mounted information systems with different resolutions, different stretching ratios exist, and due to the fact that the aspect ratio of the resolution of the images is inconsistent with the aspect ratio of the resolution of the display screen of the vehicle-mounted information system, the proportion of the images is disordered when the images are displayed on the display screen of the vehicle-mounted information system in a full screen mode.
Therefore, the prior art is in need of further improvement.
Disclosure of Invention
The invention provides an image display method and device, aiming at overcoming the defects in the prior art and realizing undistorted display of images with any resolution.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
one aspect of the present invention provides an image display method, including:
step 1, a first terminal and a second terminal establish connection according to a preset interconnection protocol;
step 2, the first terminal obtains the resolution of a display screen of the first terminal;
step 3, the first terminal calculates a corresponding image frame according to the resolution of the display screen of the first terminal and the resolution supported and output by the second terminal, and registers the image frame and the resolution of the display screen of the first terminal to the second terminal;
step 4, the second terminal judges whether the second terminal supports outputting the image with the matched resolution corresponding to the resolution registered by the first terminal, if yes, the second terminal outputs the image after adding the corresponding image frame on the image with the matched resolution, otherwise, the second terminal outputs the image after adding the corresponding image frame on the image with the default resolution;
and 5, the first terminal processes and displays the image which is output by the second terminal and added with the image frame.
Specifically, the step 5 includes:
step 501, a first terminal calculates amplification factors, wherein the amplification factors comprise horizontal pixel amplification factors and vertical pixel amplification factors;
step 502, determining an amplification factor according to a display mode received by a first terminal;
step 503, the first terminal amplifies and caches the image output by the second terminal according to the determined amplification factor;
step 504, the first terminal calculates a pixel offset value of an image capturing start position according to the display mode, wherein the pixel offset value comprises a horizontal pixel offset value and a vertical pixel offset value;
step 505, the first terminal judges the structural form of the image pixel points in the display memory, and enters step 506 when the structural form of the image pixel points is line-by-line storage; when the structural form of the image pixel points is storage according to columns, entering step 507;
step 506, reading a first amount of image data from a first initial reading position of the enlarged image buffer area for display;
and 507, reading the image data of one pixel each time from the second initial reading position of the enlarged image buffer area until the image data is completely read, and displaying.
Specifically, the first start reading position ADD1 is Offset Width Size, where Offset represents a vertical pixel Offset value, Width represents a vertical resolution of the first terminal display screen, and Size represents a Size of an image pixel.
Specifically, the first quantity W1 is Width Height Size, where Width represents the vertical resolution of the first terminal display screen, Height represents the horizontal resolution of the first terminal display screen, and Size represents the Size of the image pixel.
Specifically, the second start reading position ADD2 is (Offset + M + N) × Width Size, where Offset represents a vertical pixel Offset value, Size represents a Size of an image pixel, M is 0, 1, 2 … … Width, N is 0, 1, 2 … … Height, Width represents a vertical resolution of the first terminal display screen, and Height represents a horizontal resolution of the first terminal display screen.
Specifically, the first terminal is a vehicle-mounted information system, and the second terminal is an android mobile terminal;
specifically, the preset interconnection protocol is Android Auto.
The invention provides an image display device, which comprises a first terminal and a second terminal, wherein the first terminal is internally provided with a first connecting module, a first storage module, a frame calculating module, a registering module, an image processing module and a display module; a second connecting module, a second storage module, a frame adding module and an image output module are arranged in the second terminal; the first storage module, the frame calculation module, the registration module and the first connection module are sequentially connected, and the first connection module is sequentially connected with the image processing module and the display module; the second connection module, the second storage module, the frame adding module and the image output module are sequentially connected, and the second connection module is also connected with the image output module and the first connection module;
the first connection module and the second connection module are used for establishing connection between the first terminal and the second terminal;
the first storage module is used for storing the resolution of the display screen of the first terminal;
the frame calculation module is used for calculating a corresponding image frame according to the resolution of a display screen of the first terminal and the resolution supported and output by the second terminal;
the registration module is used for registering the image frame and the display screen resolution of the first terminal to the second terminal;
the image processing module is used for processing the image output by the second terminal;
the display module is used for displaying the image processed by the image processing module;
the second storage module is used for storing the image frame registered by the first terminal and the resolution of the display screen of the first terminal;
the frame adding module is used for adding a corresponding image frame on the output image;
and the image output module is used for outputting the image added with the image frame.
Specifically, the image output module comprises an amplification factor unit, an image amplification unit, a cache unit, an image mode acquisition unit, a pixel offset calculation unit and a pixel reading unit; the amplification factor unit, the image amplification unit, the pixel offset calculation unit and the pixel reading unit are sequentially connected, the cache unit is connected with the image amplification unit and the pixel reading unit, and the pixel offset calculation unit is also connected with the image mode acquisition unit;
the amplification factor unit is used for calculating a horizontal pixel amplification factor and a vertical pixel amplification factor;
the image amplifying unit is used for amplifying the image output by the second terminal according to the amplifying factor;
the cache unit is used for caching the amplified image;
the image mode acquiring unit is used for acquiring the currently selected display mode;
the pixel offset calculating unit is used for calculating a pixel offset value of an image interception starting position according to a display mode;
and the pixel reading unit is used for reading the image data from the cache unit according to a preset rule.
The invention has the beneficial effects that: according to the invention, the image frames and the display screen resolution of the first terminal are registered to the second terminal through the first terminal, the second terminal outputs the image frames after adding the corresponding image frames registered by the first terminal when outputting the image, and the first terminal processes and displays the image which is output by the second terminal and added with the image frames, so that the distortion-free display of the image with any resolution is realized.
Drawings
FIG. 1 is a schematic view of an image display device according to the present invention;
fig. 2 is a schematic structural diagram of an image processing module of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are for reference and illustrative purposes only and are not intended to limit the scope of the invention.
An embodiment of the present invention provides an image display method, including:
step 1, the first terminal and the second terminal establish connection according to a preset interconnection protocol.
In this embodiment, the first terminal is a vehicle-mounted information system, the second terminal is an Android mobile terminal, and the preset interconnection protocol is Android Auto.
And 2, the first terminal acquires the resolution of the display screen of the first terminal.
In this embodiment, the first terminal (in-vehicle information system) may store its own display resolution, and when necessary, the stored own display resolution may be read.
And 3, the first terminal calculates a corresponding image frame according to the resolution of the display screen of the first terminal and the resolution supported and output by the second terminal, and registers the image frame and the resolution of the display screen of the first terminal to the second terminal.
In this embodiment, the resolution of the output supported by the second terminal needs to be determined according to the version of the interconnection protocol of the second terminal, for example, 800 × 480, 1280 × 720, 1920 × 1080, and the like.
For example, the second terminal (mobile terminal) outputs 800 × 480 resolution, and the corresponding image frame is the first image frame; the second terminal (mobile terminal) outputs 1280 × 720 resolution, and the corresponding image frame is a second image frame; the second terminal (mobile terminal) outputs 1920x1080 resolution, the corresponding image frame is the third image frame … …, and so on.
And 4, the second terminal judges whether the second terminal supports outputting the image with the matched resolution corresponding to the resolution registered by the first terminal, if so, the second terminal outputs the image after adding the corresponding image frame to the image with the matched resolution, otherwise, the second terminal outputs the image after adding the corresponding image frame to the image with the default resolution.
For example, if the resolution of the display screen registered by the first terminal (in-vehicle information system) is 1280 × 720, and the second terminal (mobile terminal) itself also supports the output of an image with the resolution of 1280 × 720, a corresponding image frame (for example, a second image frame) is added to the image with the resolution of 1280 × 720 and then the image is output; on the contrary, if the second terminal (mobile terminal) does not support outputting an image of 1280 × 720 resolution by itself, a corresponding image frame (e.g., a first image frame) is added to the default output image of 800 × 480 resolution and then output.
And 5, the first terminal processes and displays the image which is output by the second terminal and added with the image frame.
In this embodiment, the step 5 includes:
step 501, the first terminal calculates amplification factors, wherein the amplification factors comprise horizontal pixel amplification factors and vertical pixel amplification factors.
For example, the second terminal (mobile terminal) informs the first terminal (telematics system) that the resolution of the currently output image is 800(H) × 480(V), and the resolution of the display screen of the first terminal (telematics system) is 1024(H) × 600(V), so that the horizontal pixel magnification factor Fh is 1024/800 — 1.28, and the vertical pixel magnification factor Fv is 600/480 — 1.25.
Step 502, determining a magnification factor according to the display mode received by the first terminal.
For example, the display mode is full-screen undistorted display, and the corresponding magnification factor is the larger of the horizontal pixel magnification factor and the vertical pixel magnification factor.
And 503, the first terminal amplifies and caches the image output by the second terminal according to the determined amplification factor.
For example, the resolution of the first terminal (in-vehicle information system) enlarged by 1.28 times for an 800 × 480 resolution image is 1024 × 614.
Step 504, the first terminal calculates a pixel offset value of an image capture starting position according to the display mode, wherein the pixel offset value comprises a horizontal pixel offset value and a vertical pixel offset value.
For example, the resolution of the display screen of the first terminal (telematics system) itself is 1024 × 600, and the resolution of the enlarged image output by the second terminal (mobile terminal) is 1024 × 614, so the address offset value of the image capture start position is (0, 7).
Step 505, the first terminal judges the structural form of the image pixel points in the display memory, and enters step 506 when the structural form of the image pixel points is line-by-line storage; and when the structural form of the image pixel points is storage according to columns, entering step 507.
Step 506, reading a first amount of image data from a first initial reading position of the enlarged image buffer area for display.
In the present embodiment, the first start reading position ADD1 is Offset Width Size, where Offset represents a vertical pixel Offset value, Width represents a vertical resolution of the first terminal display screen, and Size represents a Size of an image pixel.
In this embodiment, the first quantity W1 is Width Height Size, where Width represents the vertical resolution of the first terminal display screen, Height represents the horizontal resolution of the first terminal display screen, and Size represents the Size of the image pixels.
And 507, reading the image data of one pixel each time from the second initial reading position of the enlarged image buffer area until the image data is completely read, and displaying.
In this embodiment, the second start reading position ADD2 is (Offset + M + N) × Width Size, where Offset represents a vertical pixel Offset value, Size represents a Size of an image pixel, M is 0, 1, 2 … … Width, N is 0, 1, 2 … … Height, Width represents a vertical resolution of the first terminal display, and Height represents a horizontal resolution of the first terminal display.
As shown in fig. 1, another aspect of the present invention provides an image display apparatus, including a first terminal and a second terminal, where the first terminal is internally provided with a first connection module, a first storage module, a frame calculation module, a registration module, an image processing module, and a display module; a second connecting module, a second storage module, a frame adding module and an image output module are arranged in the second terminal; the first storage module, the frame calculation module, the registration module and the first connection module are sequentially connected, and the first connection module is sequentially connected with the image processing module and the display module; the second connection module, the second storage module, the frame adding module and the image output module are sequentially connected, and the second connection module is also connected with the image output module and the first connection module;
the first connection module and the second connection module are used for establishing connection between the first terminal and the second terminal;
the first storage module is used for storing the resolution of the display screen of the first terminal;
the frame calculation module is used for calculating a corresponding image frame according to the resolution of a display screen of the first terminal and the resolution supported and output by the second terminal;
the registration module is used for registering the image frame and the display screen resolution of the first terminal to the second terminal;
the image processing module is used for processing the image output by the second terminal;
the display module is used for displaying the image processed by the image processing module;
the second storage module is used for storing the image frame registered by the first terminal and the resolution of the display screen of the first terminal;
the frame adding module is used for adding a corresponding image frame on the output image;
and the image output module is used for outputting the image added with the image frame.
The working process of the image display device of the present invention is shown in the above image display method, and is not described herein again.
As shown in fig. 2, the image output module of the image display device of the present invention includes an amplification factor unit, an image amplification unit, a buffer unit, an image mode acquisition unit, a pixel offset calculation unit, and a pixel reading unit; the amplification factor unit, the image amplification unit, the pixel offset calculation unit and the pixel reading unit are sequentially connected, the cache unit is connected with the image amplification unit and the pixel reading unit, and the pixel offset calculation unit is also connected with the image mode acquisition unit;
the amplification factor unit is used for calculating a horizontal pixel amplification factor and a vertical pixel amplification factor;
the image amplifying unit is used for amplifying the image output by the second terminal according to the amplifying factor;
the cache unit is used for caching the amplified image;
the image mode acquiring unit is used for acquiring the currently selected display mode;
the pixel offset calculating unit is used for calculating a pixel offset value of an image interception starting position according to a display mode;
and the pixel reading unit is used for reading the image data from the cache unit according to a preset rule.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention.
Claims (7)
1. An image display method, comprising:
step 1, a first terminal and a second terminal establish connection according to a preset interconnection protocol;
step 2, the first terminal obtains the resolution of a display screen of the first terminal;
step 3, the first terminal calculates a corresponding image frame according to the resolution of the display screen of the first terminal and the resolution supported and output by the second terminal, and registers the image frame and the resolution of the display screen of the first terminal to the second terminal;
step 4, the second terminal judges whether the second terminal supports outputting the image with the matched resolution corresponding to the resolution registered by the first terminal, if yes, the second terminal outputs the image after adding the corresponding image frame on the image with the matched resolution, otherwise, the second terminal outputs the image after adding the corresponding image frame on the image with the default resolution;
and 5, the first terminal processes and displays the image which is output by the second terminal and added with the image frame, and the process comprises the following steps:
step 501, a first terminal calculates amplification factors, wherein the amplification factors comprise horizontal pixel amplification factors and vertical pixel amplification factors;
step 502, determining an amplification factor according to a display mode received by a first terminal;
step 503, the first terminal amplifies and caches the image output by the second terminal according to the determined amplification factor;
step 504, the first terminal calculates a pixel offset value of an image capturing start position according to the display mode, wherein the pixel offset value comprises a horizontal pixel offset value and a vertical pixel offset value;
step 505, the first terminal judges the structural form of the image pixel points in the display memory, and enters step 506 when the structural form of the image pixel points is line-by-line storage; when the structural form of the image pixel points is storage according to columns, entering step 507;
step 506, reading a first amount of image data from a first initial reading position of the enlarged image buffer area for display;
and 507, reading the image data of one pixel each time from the second initial reading position of the enlarged image buffer area until the image data is completely read, and displaying.
2. The image display method according to claim 1, wherein the first start reading position ADD1= Offset Width Size, where Offset represents a vertical pixel Offset value, Width represents a vertical resolution of the first terminal display screen, and Size represents a Size of an image pixel dot.
3. The image display method according to claim 2, wherein the first number W1= Width Height Size, where Width denotes a vertical resolution of the first terminal screen, Height denotes a horizontal resolution of the first terminal screen, and Size denotes a Size of the image pixel.
4. The image display method according to claim 1, wherein the second start reading position ADD2= (Offset + M + N) × Width = Size, where Offset represents a vertical pixel Offset value, Size represents a Size of a pixel point of the image, M =0, 1, 2 … … Width, N =0, 1, 2 … … Height, Width represents a vertical resolution of the first terminal display screen, and Height represents a horizontal resolution of the first terminal display screen.
5. The image display method according to any one of claims 1 to 4, wherein the first terminal is a vehicle-mounted information system, and the second terminal is an android mobile terminal.
6. The image display method according to any one of claims 1 to 4, wherein the preset interconnection protocol is Android Auto.
7. An image display device is characterized by comprising a first terminal and a second terminal, wherein a first connecting module, a first storage module, a frame calculating module, a registering module, an image processing module and a display module are arranged in the first terminal; a second connecting module, a second storage module, a frame adding module and an image output module are arranged in the second terminal; the first storage module, the frame calculation module, the registration module and the first connection module are sequentially connected, and the first connection module is sequentially connected with the image processing module and the display module; the second connection module, the second storage module, the frame adding module and the image output module are sequentially connected, and the second connection module is also connected with the image output module and the first connection module;
the first connection module and the second connection module are used for establishing connection between the first terminal and the second terminal;
the first storage module is used for storing the resolution of the display screen of the first terminal;
the frame calculation module is used for calculating a corresponding image frame according to the resolution of a display screen of the first terminal and the resolution supported and output by the second terminal;
the registration module is used for registering the image frame and the display screen resolution of the first terminal to the second terminal;
the image processing module is used for processing the image output by the second terminal;
the display module is used for displaying the image processed by the image processing module;
the second storage module is used for storing the image frame registered by the first terminal and the resolution of the display screen of the first terminal;
the frame adding module is used for adding a corresponding image frame on the output image;
the image output module is used for outputting the image added with the image frame;
the image output module comprises an amplification factor unit, an image amplification unit, a cache unit, an image mode acquisition unit, a pixel offset calculation unit and a pixel reading unit; the amplification factor unit, the image amplification unit, the pixel offset calculation unit and the pixel reading unit are sequentially connected, the cache unit is connected with the image amplification unit and the pixel reading unit, and the pixel offset calculation unit is also connected with the image mode acquisition unit;
the amplification factor unit is used for calculating a horizontal pixel amplification factor and a vertical pixel amplification factor;
the image amplifying unit is used for amplifying the image output by the second terminal according to the amplifying factor;
the cache unit is used for caching the amplified image;
the image mode acquiring unit is used for acquiring the currently selected display mode;
the pixel offset calculation unit is used for calculating a pixel offset value of an image interception starting position according to a display mode;
and the pixel reading unit is used for reading the image data from the cache unit according to a preset rule.
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