CN112346681B - Image display control method, device and system and computer readable medium - Google Patents
Image display control method, device and system and computer readable medium Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1407—General aspects irrespective of display type, e.g. determination of decimal point position, display with fixed or driving decimal point, suppression of non-significant zeros
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04845—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range for image manipulation, e.g. dragging, rotation, expansion or change of colour
Abstract
The embodiment of the invention discloses an image display control method, an image display control device, an image display control system and a computer readable medium. The image display control method includes, for example: receiving image display control data; receiving and caching input image data; generating a first image data valid indication signal and a second image data valid indication signal; reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output; and displaying the image to be output. The embodiment of the invention realizes that the image copying or mirroring is finished under the condition of not additionally consuming window resources, and improves the real-time performance of data processing and image display.
Description
Technical Field
The present invention relates to the field of display control technologies, and in particular, to an image display control method, an image display control apparatus, an image display control system, and a computer readable medium.
Background
At present, video processing methods based on Programmable logic devices such as an FPGA (Field-Programmable Gate Array) convert and unify various input video sources to a system clock, use a multi-channel selection Module (MUX) to complete selection of an image window input source and perform scaling processing on the image window input source, and then perform window overlay processing and output. The copying and mirroring of image windows is a very practical function that can make video or image effects more colorful. In order to copy or mirror the image window, it is often necessary to implement two image windows (or image layers), select the same input source for the two image windows, configure the same scaling parameter, and appropriately adjust the output positions of the two image windows to implement the copy function of the image window. For the mirror image of the window, an image window needs to be turned over to complete the mirror image function of the image window. But this approach consumes additional window resources; in addition, when the mirror image function is realized, one image window needs to be turned over, the requirement and consumption of system resources are larger, and the real-time performance of video processing and video output is influenced.
Disclosure of Invention
The embodiment of the invention provides an image display control method, an image display control device, an image display control system and a computer readable medium, which can finish image copying or mirroring without additionally consuming window resources and improve the real-time performance of data processing and image display.
In one aspect, an image display control method provided in an embodiment of the present invention includes: receiving image display control data; receiving and caching input image data; generating a first image data valid indication signal and a second image data valid indication signal; reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output; and displaying the image to be output.
The technical scheme has the following advantages and technical effects: according to the embodiment of the invention, the two image data effective indication signals are generated, the input image data are read twice according to the image data effective indication signals and are respectively displayed at different positions on the image to be output according to the image display control data, so that image copying or mirroring is completed under the condition of not additionally consuming window resources, and the real-time performance of data processing and image display is improved.
In one embodiment of the present invention, the window display control data includes a size and a position in the image to be output of the first output image data, an image display distance in the image to be output of the first output image data and the second output image data, and an image display type in the image to be output of the first output image data and the second output image data.
In an embodiment of the present invention, the reading the input image data twice according to the image display control data, the first image data valid indication signal, and the second image data valid indication signal to obtain first output image data and second output image data, respectively, and writing the first output image data and the second output image data into an image to be output includes: determining a first preset reading sequence and a second preset reading sequence according to the image display type; reading the input image data according to the first image data effective indication signal and the first preset reading sequence to obtain first output image data; reading the input image data according to the second image data effective indication signal and the second preset reading sequence to obtain second output image data; and writing the first output image data and the second output image data into the image to be output according to the size and the position of the first output image data and the image display distance.
In one embodiment of the present invention, the first preset reading order and the second preset reading order are the same or opposite.
On the other hand, an image display control apparatus provided by an embodiment of the present invention includes: the control data receiving module is used for receiving the image display control data; the input data receiving module is used for receiving and caching input image data; the indication signal generation module is used for generating a first image data effective indication signal and a second image data effective indication signal; the image data reading and writing module is used for reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output; and the image data display module is used for displaying the image to be output.
In one embodiment of the present invention, the window display control data includes a size and a position of the first output image data in the image to be output, an image display distance of the first output image data and the second output image data in the image to be output, and an image display type of the first output image data and the second output image data in the image to be output.
In an embodiment of the present invention, the image data reading and writing module is specifically configured to: determining a first preset reading sequence and a second preset reading sequence according to the image display type; reading the input image data according to the first image data effective indication signal and the first preset reading sequence to obtain first output image data; reading the input image data according to the second image data effective indication signal and the second preset reading sequence to obtain second output image data; and writing the first output image data and the second output image data into the image to be output according to the size and the position of the first output image data and the image display distance.
In one embodiment of the present invention, the first preset reading order and the second preset reading order are the same or opposite.
In another aspect, an embodiment of the present invention provides an image display control system, including: a memory storing a computer program and a processor connected to the memory, the processor executing the image display control method as described above when executing the computer program.
In still another aspect, an embodiment of the present invention provides a computer-readable medium, which is a non-volatile memory and stores computer-executable instructions for performing the image display control method as described above.
One or more of the above technical solutions may have the following advantages or beneficial effects: according to the embodiment of the invention, the two image data effective indication signals are generated, the input image data are read twice according to the image data effective indication signals and are respectively displayed at different positions on the image to be output according to the image display control data, so that image copying or mirroring is completed under the condition of not additionally consuming window resources, and the real-time performance of data processing and image display is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating an image display control method according to a first embodiment of the present invention.
Fig. 2a is a schematic diagram illustrating the effect of implementing image window duplication.
Fig. 2b is a schematic diagram illustrating the effect of implementing right mirroring of the image window.
Fig. 2c is a schematic diagram illustrating the effect of implementing the left mirror image of the image window.
Fig. 3 is a schematic structural diagram of an image display control apparatus according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an image display control system according to a third embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a computer-readable medium according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A
As shown in fig. 1, a first embodiment of the present invention provides an image display control method. Specifically, the image display control method provided in the embodiment of the present invention includes, for example, the steps of:
s11: receiving image display control data;
s13: receiving and caching input image data;
s15: generating a first image data valid indication signal and a second image data valid indication signal;
s17: reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output;
and
s19: and displaying the image to be output.
In order to facilitate understanding of the present invention, each step of the image display control method of the present embodiment will be described in detail below.
Generally, when a user wants to display a copied or mirrored image on a display screen, the user needs to send an image display control data packet of the image copy or mirrored image to a video processing device through an upper computer such as a PC, input image data to be copied or mirrored for the video processing device to perform image processing, generate a copied or mirrored image, and then send the copied or mirrored image to the display screen such as an LED display screen through a display controller for displaying. The video processing device includes, for example, an embedded processor and a programmable logic device coupled to the embedded processor. The embedded processor is, for example, a processor based on an ARM core, and may be used to receive an image display control packet sent by an upper computer, analyze the image display control packet to obtain image display control data, and transmit the image display control data to a programmable logic device. The programmable logic device is, for example, an FPGA, and is configured to process the received input image data 10 according to the image display control data to implement functions such as copying or mirroring of an image window. To implement the copy or mirror function of the image window, two portions of the output image data are typically displayed at different locations of the image to be output 20. The two pieces of output image data are named as first output image data 21 and second output image data 23 here, and the description is given by taking as an example the realization of the copy or mirror function in the horizontal direction, and the copy or mirror function in the vertical direction similarly. Specifically, the detailed implementation process of the image display control method provided by the embodiment of the present invention is as follows.
First, the FPGA receives image display control data that is parsed and transferred via the embedded processor. Specifically, as the window display control data, the size (width × height) of the first output image data 21, the position (coordinates) of the first output image data 21 in the image to be output 20, the image display distance D (here, taking the horizontal distance as an example) of the first output image data 21 and the second output image data 23 in the image to be output 20, the image display type of the first output image data 21 and the second output image data 23 in the image to be output 20, and the like are included. The image display types include, for example, a copy type and a mirror type. The copy type is, for example, that the first output image data 21 and the second output image data 23 are displayed the same in the horizontal direction in the image to be output 20 (see fig. 2 a). The mirror image type is, for example, that the first output image data 21 and the second output image data 23 are displayed in a mirror image in the image to be output 20, i.e. the second output image data 23 and the first output image data 21 display opposite contents in the vertical direction in the image to be output 20 (see fig. 2 b).
Secondly, the FPGA receives and buffers the input image data. The FPGA receives and buffers the input image data 10 sent from the host computer, for example, to a memory RAM inside the FPGA.
Then, the FPGA generates a first image data valid indication signal DE1 and a second image data valid indication signal DE2. The image data valid indication signal DE may for example represent an indication signal of the valid width of the read image data, which is typically the width of the input image data 10 to be read, i.e. the input image data 10 is read from the beginning to the end. Of course, it is also possible for the image data valid indicator signal DE to be smaller than the width of the input image data 10, i.e. for only a partial image to be displayed in the image 20 to be output. The first image data valid indication signal DE1 and the second image data valid indication signal DE2 are used to read the input image data 10 buffered by the FPGA, respectively. The first image data valid indication signal DE1 and the second image data valid indication signal DE2 are the same two image data valid indication signals, and are equal to the width of the input image data, that is, all the input image data 10 are read at once.
Then, the FPGA reads the input image data 10 twice according to the image display control data, the first image data valid indication signal DE1, and the second image data valid indication signal DE2, to obtain first output image data 21 and second output image data 23, respectively, and writes the first output image data 21 and the second output image data 23 into the image 20 to be output. Specifically, the FPGA reads the input image data according to the image display type, the first preset reading order, and the second preset reading order, and according to the first image data valid indication signal DE1 and the first preset reading order, obtains first output image data 21; reading the input image data according to the second image data valid indication signal DE2 and the second preset reading sequence to obtain second output image data 20; writing the first output image data 21 and the second output image data into the image to be output 10 according to the size and the position of the first output image data 21 and according to the image display distance.
Further, the first preset read order and the second preset read order may be opposite or the same. As shown in fig. 2a, when the image display type is the copy type, the first preset reading order and the second preset reading order are the same, i.e. the images indicating the first output image data and the second output image data are the same. The display screen display is characterized by point-by-point display from left to right, so the FPGA reads the input image data from the RAM according to the first image data valid indication signal DE1 and the first preset reading sequence, for example, from left to right, then reads the input image data again according to the second image data valid indication signal DE2 and the second preset reading sequence, for example, from left to right, then writes the first output image data 21 into the corresponding position of the image 20 to be output according to the size (width × height) and position of the first output image data 21, and writes the second output image data 23 into the corresponding position of the image 10 to be output according to the image display distance D of the first output image data 21 and the second output image data 23 in the image 20 to be output. In this way, the copy function of the image window is realized. As shown in fig. 2b, when the image display type is mirror image, the first preset reading order and the second preset reading order are opposite, that is, the images indicating the first output image data and the second output image data are opposite. Therefore, the FPGA reads the input image data from the RAM in accordance with the first image data valid indication signal DE1 and the first preset reading order, for example, from left to right, and then reads the input image data again in accordance with the second image data valid indication signal DE2 and the second preset reading order, for example, from right to left, and then writes the first output image data 21 in a corresponding position of the image to be output 20 in accordance with the size (width × height) and position of the first output image data 21, and writes the second output image data 23, which is opposite to the first output image data 21, in a corresponding position of the image to be output 10 in accordance with the image display distance D of the first output image data 21 and the second output image data 23 in the image to be output 20. This enables the mirror function of the image window. Further, the sign of the image display distance D here may be positive or negative. When the sign of the image display distance D is positive, it indicates that the position of the second output image data 21 is behind the first output image data 23, i.e. after the first output image data 21 is written, the second output image data 23 is written, and the right mirror image of the image shown in fig. 2b is implemented. When the sign of the image display distance D is negative, it indicates that the position of the second input image data 21 is before the first input image data 23, i.e. the second output image data 23 is written, and then the first output image data 21 is written, so as to implement the left mirror image of the image shown in fig. 2 c.
Finally, the image 20 to be output is output to a display screen for display. Specifically, for example, the video processing apparatus sends the image 20 to be output to a display controller having a function of sending a card, and sends the image to a display screen after being processed by the display controller to implement window image copying or mirroring.
Further, before receiving and buffering the input image data 10, the image display control method provided in the embodiment of the present invention further includes: and carrying out scaling processing on the input image data.
It should be noted that the input image data 10 may be a line of input image data, a block of input image data, or a whole piece of input image data. When the input image data 10 is a line of input image data, the FPGA receives and buffers a line of input image data, then reads an input image data block twice and writes it into the image to be output, and then receives and buffers the next line of input image data until the whole input image data is processed. When the input image data 10 is an input image data block, the FPGA receives and buffers an input image data block, and then reads an input image data block twice and writes the data block into an image to be output. When the input image data 10 is a whole input image data, the FPGA receives and buffers the whole input image data, and then reads the whole input image data twice and writes the data into the image to be output. Moreover, the sequence of the steps in the image display control method provided in the embodiment of the present invention is only an example, and when the implementation adjustment of the image display control method is satisfied, the implementation sequence of some steps may be different from that of the foregoing steps, for example, step S13 may be implemented before step S11.
In summary, compared with the prior art that two image windows (or image layers) are needed to be used for implementation, the same input source is selected for the two image windows, and the two image windows are subjected to position adjustment, image inversion and other operations, the embodiment of the present invention reads the input image data two times according to the two image data valid indication signals and respectively displays the input image data at different positions on the image to be output according to the image display control data, so that image copying or mirroring is achieved without additional consumption of window resources, and the real-time performance of data processing and image display is improved.
[ second embodiment ]
As shown in fig. 3, a second embodiment of the present invention provides an image display control apparatus 300. The image display control apparatus 300 includes, for example, a control data receiving module 310, an input data receiving module 330, an indication signal generating module 350, an image data reading/writing module 370, and an image data display module 390.
The control data receiving module 310 is configured to receive image display control data.
An input data receiving module 330, configured to receive and buffer input image data.
The indication signal generating module 350 is configured to generate a first image data valid indication signal and a second image data valid indication signal.
An image data reading and writing module 370, configured to read the input image data twice according to the image display control data, the first image data valid indication signal, and the second image data valid indication signal to obtain first output image data and second output image data, respectively, and write the first output image data and the second output image data into an image to be output. Specifically, the image data reading and writing module 370 is configured to: determining a first preset reading sequence and a second preset reading sequence according to the image display type; reading the input image data according to the first image data effective indication signal and the first preset reading sequence to obtain first output image data; reading the input image data according to the second image data effective indication signal and the second preset reading sequence to obtain second output image data; and writing the first output image data and the second output image data into the image to be output according to the size and the position of the first output image data and the image display distance.
And an image data display module 390, configured to display the image to be output.
In addition, the image display control device 300 further includes, for example, an image data scaling module (not shown in the figure) for performing scaling processing on the input image data.
Further, the modules in the image display control apparatus 300 in this embodiment may be integrated into a programmable logic device in the video processing device. The specific operation and technical effects between the modules in the image display control apparatus 300 in the present embodiment are described with reference to the foregoing first embodiment.
[ third embodiment ] A
As shown in fig. 4, a third embodiment of the present invention provides an image display control system 400. The image display control system 400 includes, for example, a memory 410 and a processor 430 connected to the memory 410. The memory 410 may be, for example, a non-volatile memory, on which the computer program 411 is stored. The processor 430 may be, for example, an embedded processor. The processor 430 executes the image display control method in the foregoing first embodiment when running the computer program 411.
The specific operation and technical effects of the image display control system 400 in the present embodiment are described with reference to the foregoing first embodiment.
[ fourth embodiment ]
As shown in FIG. 5, a fourth embodiment of the invention provides a computer-readable medium 500. The computer-readable medium 500 is, for example, a non-volatile memory, such as: magnetic media (e.g., hard disks, floppy disks, and magnetic tape), optical media (e.g., CDROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices that are specially constructed for the storage and execution of computer-executable instructions (e.g., read-only memories (ROMs), random Access Memories (RAMs), flash memories, etc.). The computer-readable medium 500 has stored thereon computer-executable instructions 510. The computer-readable medium 500 may execute the computer-executable instructions 510 by one or more processors or processing devices to implement the image display control method in the foregoing first embodiment.
In the several embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. An image display control method, characterized by comprising:
receiving image display control data;
receiving and caching input image data;
generating a first image data valid indication signal and a second image data valid indication signal;
reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output; and
displaying the image to be output;
wherein the image display control data includes a size and a position in the image to be output of the first output image data, an image display distance in the image to be output of the first output image data and the second output image data, an image display type in the image to be output of the first output image data and the second output image data;
wherein the reading the input image data twice according to the image display control data, the first image data valid indication signal, and the second image data valid indication signal to obtain first output image data and second output image data, respectively, and writing the first output image data and the second output image data into an image to be output includes:
determining a first preset reading sequence and a second preset reading sequence according to the image display type;
reading the input image data according to the first image data effective indication signal and the first preset reading sequence to obtain first output image data;
reading the input image data according to the second image data effective indication signal and the second preset reading sequence to obtain second output image data;
and writing the first output image data and the second output image data into the image to be output according to the size and the position of the first output image data and the image display distance.
2. The image display control method according to claim 1, wherein the first preset reading order and the second preset reading order are the same or opposite.
3. An image display control apparatus, comprising:
the control data receiving module is used for receiving the image display control data;
the input data receiving module is used for receiving and caching input image data;
the indication signal generation module is used for generating a first image data effective indication signal and a second image data effective indication signal;
the image data reading and writing module is used for reading the input image data twice according to the image display control data, the first image data effective indication signal and the second image data effective indication signal to respectively obtain first output image data and second output image data, and writing the first output image data and the second output image data into an image to be output; and
the image data display module is used for displaying the image to be output;
wherein the image display control data includes a size and a position in the image to be output of the first output image data, an image display distance in the image to be output of the first output image data and the second output image data, an image display type in the image to be output of the first output image data and the second output image data;
the image data read-write module is specifically configured to:
determining a first preset reading sequence and a second preset reading sequence according to the image display type;
reading the input image data according to the first image data effective indication signal and the first preset reading sequence to obtain first output image data;
reading the input image data according to the second image data effective indication signal and the second preset reading sequence to obtain second output image data;
and writing the first output image data and the second output image data into the image to be output according to the size and the position of the first output image data and the image display distance.
4. The image display control device according to claim 3, wherein the first preset reading order and the second preset reading order are the same or opposite.
5. An image display control system, characterized by comprising: a memory storing a computer program and a processor connected to the memory, the processor executing the image display control method according to any one of claims 1 to 2 when executing the computer program.
6. A computer-readable medium which is a non-volatile memory and stores computer-executable instructions for performing the image display control method according to any one of claims 1 to 2.
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