CN112492239A - Character superposition display method, device and system and computer readable storage medium - Google Patents
Character superposition display method, device and system and computer readable storage medium Download PDFInfo
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- CN112492239A CN112492239A CN201910861276.1A CN201910861276A CN112492239A CN 112492239 A CN112492239 A CN 112492239A CN 201910861276 A CN201910861276 A CN 201910861276A CN 112492239 A CN112492239 A CN 112492239A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
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Abstract
The embodiment of the invention discloses a character superposition display method, a device and a system and a computer readable storage medium. The character superposition display method comprises the following steps: acquiring characters to be displayed and a target image; generating a binary image according to the characters; acquiring a display position of the character on the target image; and superposing the character to the target image according to the binary image, the preset color information and the display position. The embodiment of the invention can realize flexible superposition display of the characters on the target image.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a character superimposition display method, a character superimposition display device, a character superimposition display system, and a computer-readable storage medium.
Background
In the field of display technology, it is often involved the need to display characters, such as letters, numbers, chinese characters or other symbols, onto an image. For example, an output screen of a video processor usually needs to display character information defined by a user, and in order to display the character information on an output image, the user usually needs to define the character information in advance, directly process the character information into an RGB image and store the RGB image in a Programmable logic device (FPGA), and then superimpose the character image on the output image.
However, as the function of the video processor is complicated, more and more character information needs to be displayed in an overlapping manner, and more RGB images corresponding to the character information are generated by the prior art, and the RGB images occupy more storage space, so that the hardware requirement of the video processor is higher.
Disclosure of Invention
Therefore, to overcome the defects and shortcomings in the prior art, embodiments of the present invention provide a character superimposition display method, a character superimposition display device, a character superimposition display system, and a computer-readable storage medium, so as to implement flexible superimposition display of characters on a target image.
In one aspect, an embodiment of the present invention provides a character superimposition display method, including:
acquiring characters to be displayed and a target image;
generating a binary image according to the characters;
acquiring a display position of the character on the target image; and
and superposing the character to the target image according to the binary image, the preset color information and the display position.
In the above scheme, the characters to be displayed and the target image are acquired, the binary image is generated according to the characters, the display positions of the characters on the target image are acquired, and the characters are superimposed on the target image according to the binary image, the preset color information and the display positions, so that the characters are displayed on the target image.
In an embodiment of the present invention, the generating the corresponding binary image according to the character specifically includes: modulo the character to generate the binary image of the character.
In an embodiment of the present invention, the superimposing the character onto the target image according to the binary image, the predetermined color information, and the display position specifically includes:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
In one embodiment of the present invention, before the superimposing the character on the target image according to the binary image, the predetermined color information, and the display position, the character superimposition display method further includes: and acquiring the preset color information.
On the other hand, an embodiment of the present invention provides a character superimposition display device, including:
the character and image information acquisition module is used for acquiring characters to be displayed and target images;
the binary image generation module is used for generating a binary image according to the character;
the display position acquisition module is used for acquiring the display position of the character on the target image; and
and the superposition display module is used for superposing the characters on the target image according to the binary image, the preset color information and the display position.
In the above scheme, the characters to be displayed and the target image are acquired, the binary image is generated according to the characters, the display positions of the characters on the target image are acquired, and the characters are superimposed on the target image according to the binary image, the preset color information and the display positions, so that the characters are displayed on the target image.
In an embodiment of the present invention, the binary image generating module is specifically configured to: modulo the character to generate the binary image of the character.
In an embodiment of the present invention, the overlay display module is specifically configured to:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
In an embodiment of the present invention, the character superimposition display device further includes a color information acquisition module configured to acquire predetermined color information.
In another aspect, an embodiment of the present invention provides a character superimposition display system, including: a memory and a processor coupled to the memory; the memory stores a computer program, and the processor executes any one of the character superimposition display methods when running the computer program.
In still another aspect, an embodiment of the present invention provides a computer-readable storage medium, where the storage medium stores computer-executable instructions for performing any one of the above character superimposition display methods.
One or more of the above technical solutions may have the following advantages or beneficial effects: in the above embodiment of the present invention, by acquiring a character to be displayed and a target image, generating a binary image according to the character, acquiring a display position of the character on the target image, and superimposing the character on the target image according to the binary image, predetermined color information, and the display position, the character is displayed on the target image, so that flexible display of the character according to the display position and the predetermined color information is achieved, and in addition, since the character generates the binary image, compared with the prior art in which the character is directly processed into an RGB image, a storage space of a character superimposing display apparatus is saved.
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 a character superimposition display method according to a first embodiment of the present invention.
Fig. 2 is a schematic flow chart of another character superimposition display method according to the first embodiment of the present invention.
Fig. 3 is a schematic block diagram of a character overlay display device according to a second embodiment of the present invention.
Fig. 4 is a schematic block diagram of another character superimposition display device according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a character superimposition display system according to a third embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a computer-readable storage 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 method for manufacturing a semiconductor device
Referring to fig. 1, there is shown a character superimposition display method of the first embodiment of the present invention. The character superimposition display method includes, for example, the steps of:
s102, acquiring characters to be displayed and a target image;
s104, generating a binary image according to the characters;
s106, acquiring the display position of the character on the target image; and
and S108, superimposing the character on the target image according to the binary image, the preset color information and the display position.
In a specific embodiment, step S104 is specifically: modulo the character to generate the binary image of the character.
In a specific embodiment, step S108 specifically includes:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
Alternatively, the first pixel value and the second pixel value represent a value of a pixel with a character and a value of a pixel without a character, respectively. For example, the first pixel value is 1, which indicates that there is a character, and the target pixel is displayed at the target position according to the color information; the second pixel value is 0, indicating that there is no character here, and the pixel of the target image at the target display position is displayed.
In a specific embodiment, before step S108, for example, as shown in fig. 2, step S107 is further included to obtain the predetermined color information. It should be noted that, step S107 may also precede any one of steps S102, S104, S106, and S108, and the embodiment of the present invention is not limited herein.
For the convenience of understanding of the present embodiment, the character superimposition display method of the present embodiment is described in detail below in conjunction with a video processor.
The video processor typically includes a microprocessor such as an MCU (Micro Control Unit) and a Programmable logic device such as an FPGA (Field-Programmable Gate Array). The video processor is used for processing the video source and displaying the video image, namely displaying the target image. According to the requirement of a user, for example, characters such as "video source 1" need to be displayed on the video image to identify the video image as a video image output by a first video output port of a video processor, then the user needs to input the character "video source 1" to the video processor to enable the video processor to acquire the character "video source 1" first, and then perform a modulo process on the character "video source 1" to generate a binary image, wherein the modulo process may adopt an existing modulo technology, and is not limited herein as long as information of the character can be extracted. Here, a binary image is generated by performing modulo processing on a character "video source 1", and a pixel value of the binary image is 0 or 1, so that when the binary image is stored in a programmable logic device such as a Random Access Memory (RAM) inside an FPGA, since one pixel only occupies a storage space of 1bit, a storage space is greatly saved compared with a case where a character is directly stored as an RGB image in the prior art. For example, if the size of a binary image of a character is 128 × 64, only a memory space of 128 × 64 — 8Kb — 1Kb is required to store the binary image, and if the character is directly stored as an RGB image, if the character is stored as 24 bits, a memory space of 24Kb is required to store the RGB image, so that the memory space occupies too much compared to storing the character as a binary image.
Further, the user sets the display position of the character "video source 1" on the target image, where the display position of the character on the target image can be determined by the user setting the start coordinate, width and height of the display position.
In addition, the user also needs to define the color information of the character, that is, the character needs to be displayed in a corresponding color, for example, if the custom color information is red, the character needs to be displayed in red. Of course, the color information may be obtained before the character is superimposed, and the sequence of the steps of obtaining the character and the target image, generating the binary image, and obtaining the position information is not limited herein. It is worth mentioning that the flexibility and the diversity of the color display of the characters are improved and the user experience degree is improved through the user-defined color.
Further, the specific display position of each pixel of the binary image on the target image can be determined according to the display position. For a certain pixel of the binary image, when its pixel value is 1, where 1 denotes opaque, the pixel is displayed as predetermined color information, for example, red, at the corresponding position of the pixel. When the pixel value thereof is 0, the pixel at the position of the target image is displayed at the position. Therefore, at the display position, for all pixels of which the pixel value of the binary image is 1, i.e. opaque, the corresponding character "video source 1" is displayed in accordance with the predetermined color information, e.g. red, and for all pixels of which the pixel value of the binary image is 0, i.e. transparent, the corresponding pixels of the video image, i.e. the target image, output by the video processor are displayed at the corresponding position.
In the above scheme, the characters to be displayed and the target image are acquired, the binary image is generated according to the characters, the display positions of the characters on the target image are acquired, and the characters are superposed on the target image according to the binary image, the preset color information and the display positions, so that the characters are displayed on the target image.
[ second embodiment ]
As shown in fig. 3, a second embodiment of the present invention provides a character superimposition display device 200. The character superimposition display device 200 includes, for example, a character and image information acquisition module 202, a binary image generation module 204, a display position acquisition module 206, and a superimposition display module 208.
Specifically, the character and image information acquisition module 202 is used to acquire characters to be displayed and a target image.
The binary image generation module 204 is used for generating a binary image according to the character;
the display position acquiring module 206 is configured to acquire a display position of the character on the target image.
The overlay display module 208 is configured to overlay the character onto the target image according to the binary image, the predetermined color information, and the display position.
In a specific embodiment, the binary image generating module 204 is specifically configured to: modulo the character to generate the binary image of the character.
In a specific embodiment, the overlay display module 208 is specifically configured to:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
In a specific embodiment, the character superimposition display device 200 further includes a color information obtaining module 207 for obtaining predetermined color information.
The specific operation and technical effects between the modules in the character superimposition display device 200 in the present embodiment are described with reference to the foregoing first embodiment.
[ third embodiment ]
As shown in fig. 5, a third embodiment of the present invention provides a character overlay display system 300. The character overlay display system, e.g., 300, includes a memory 310 and a processor 330 coupled to the memory 310. The memory 310 may be, for example, a non-volatile memory, on which a computer program 311 is stored. The processor 330 may, for example, comprise an embedded processor. The processor 330 executes the character superimposition display method provided in the foregoing first embodiment when running the computer program 311.
[ fourth example ] A
As shown in FIG. 6, a fourth embodiment of the invention provides a computer-readable storage medium 400 having stored thereon computer-executable instructions 410. The computer-executable instructions 410 are for performing the character overlay display method as described in the foregoing first embodiment. The computer-readable storage medium 400 is, for example, a non-volatile memory, such as including: 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 specially constructed for storing and executing computer-executable instructions (e.g., Read Only Memories (ROMs), Random Access Memories (RAMs), flash memories, etc.). The computer-readable storage medium 400 may execute the computer-executable instructions 410 by one or more processors or processing devices.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
In the 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 embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and an actual implementation may have another division, 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.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
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 (10)
1. A character superimposition display method is characterized by comprising the following steps:
acquiring characters to be displayed and a target image;
generating a binary image according to the characters;
acquiring a display position of the character on the target image; and
and superposing the character to the target image according to the binary image, the preset color information and the display position.
2. The method for displaying characters in an overlaid manner according to claim 1, wherein the generating of the corresponding binary image according to the characters is specifically: modulo the character to generate the binary image of the character.
3. The character superimposition display method according to claim 1, wherein superimposing the character on the target image according to the binary image, the predetermined color information, and the display position specifically includes:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
4. The character superimposition display method according to claim 1, further comprising, before the superimposing the character on the target image in accordance with the binary image, the predetermined color information, and the display position: and acquiring the preset color information.
5. A character superimposition display device, characterized by comprising:
the character and image information acquisition module is used for acquiring characters to be displayed and target images;
the binary image generation module is used for generating a binary image according to the character;
the display position acquisition module is used for acquiring the display position of the character on the target image; and
and the superposition display module is used for superposing the characters on the target image according to the binary image and the preset color information and the display position.
6. The character superimposition display device according to claim 5, wherein the binary image generation module is specifically configured to: modulo the character to generate the binary image of the character.
7. The character superimposition display device according to claim 5, wherein the superimposition display module is specifically configured to:
determining a target display position of a target pixel of the binary image on the target image according to the display position;
when a value corresponding to a target pixel of the binary image is a first pixel value, displaying the target pixel at the target display position according to the preset color information; and
and when the value corresponding to the target pixel of the binary image is a second pixel value, displaying the pixel of the target image at the target display position on the target display position.
8. The character superimposition display device according to claim 5, further comprising: and the color information acquisition module is used for acquiring the preset color information.
9. A character superimposition display system, comprising: a memory and a processor coupled to the memory; the memory stores a computer program, and the processor executes the computer program to execute the character superimposition display method according to any one of claims 1 to 4.
10. A computer-readable storage medium storing computer-executable instructions for performing the character superimposition display method according to any one of claims 1 to 4.
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