CN114205658A - Image display method, apparatus, system, and computer-readable storage medium - Google Patents
Image display method, apparatus, system, and computer-readable storage medium Download PDFInfo
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- CN114205658A CN114205658A CN202010879110.5A CN202010879110A CN114205658A CN 114205658 A CN114205658 A CN 114205658A CN 202010879110 A CN202010879110 A CN 202010879110A CN 114205658 A CN114205658 A CN 114205658A
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
Abstract
The embodiment relates to an image display method, comprising the following steps: acquiring an offset value of an input image relative to a coordinate origin of a display area; judging whether the offset value is larger than zero; when the offset value is larger than zero, determining the initial position of the input image in the display area; determining an end position of the input image in the display area based on the resolution of the display area, the start position, and the resolution of the input image; supplementing image data to areas except the input image in the display area based on the resolution of the display area and the initial position and the end position of the input image in the display area to obtain first target image data; reading second target image data of the input image based on the start position and the end position of the input image; and obtaining image data of the display area according to the first target image data and the second target image data, and sending the image data to the display screen. The embodiment achieves the purpose of flexibility of image display by positively offsetting the input image when the offset value is judged to be greater than zero.
Description
Technical Field
The present invention relates to the field of image display, and in particular, to an image display method, an image display apparatus, an image display system, and a computer-readable storage medium.
Background
A display system, such as an LED display system, includes an input source, a display screen controller, an LED display control card, and a display screen. The application of the negative offset function of the input image is very common, and is generally implemented in a display screen controller, specifically, the input image is relative to the display area of the display screen, and the negative offset refers to the negative movement of the input image relative to the display area of the display screen. For example, when the resolution of the display screen is smaller than the resolution of the input image of the input source, the position of the starting point of the input image coincides with the origin of coordinates (i.e., the vertex of the upper left corner) of the display area of the display screen, and when the user wants to view other positions of the input image, the user needs to perform a negative offset operation on the input image. However, the current display system can only realize the negative offset of the input image, but cannot realize the positive offset of the input image, and the application and the image display effect of the display system have limitations and cannot meet the higher image display requirement of a user.
Disclosure of Invention
Accordingly, to overcome the defects and shortcomings of the prior art, embodiments of the present invention provide an image display method, an image display apparatus, an image display system, and a computer-readable storage medium.
In one aspect, an image display method provided in an embodiment of the present invention includes: acquiring an offset value of an input image relative to a coordinate origin of a display area on a display screen; judging whether the offset value is larger than zero; in response to the offset value being greater than zero, determining a starting position of an input image in the display area; determining an end position of the input image in the display area based on a resolution of the display area, a start position of the input image, and a resolution of the input image; supplementing image data to the area, except the input image, in the display area based on the resolution of the display area and the starting position and the end position of the input image in the display area to obtain first target image data; reading corresponding second target image data in the input image based on the starting position and the end position of the input image in the display area; and obtaining the image data of the display area according to the first target image data and the second target image data, and sending the image data of the display area to the display screen for displaying.
In the prior art, because the application of the negative offset function of the input image is very common, when a user needs to watch other positions of the input image, only the negative offset operation can be performed on the input image, and the positive offset operation of the input image cannot be realized, so that the display effect of the image has limitation, and the higher requirement of the user on image display cannot be met. The embodiment of the invention firstly obtains the offset value, then judges the size of the offset value, obtains the initial position of the display area of the input image in the display screen and calculates the end position when the offset value is larger than zero, then determines the area size of the display area except the input image and the area size of the input image in the display area according to the initial position and the end position, then respectively supplements the image data to obtain the first target image data and the second target image data, combines the first target image data and the second target image data to obtain the image data and then sends the image data to the display screen for display, thereby realizing the positive offset function of the input image, improving the display effect of the input image, improving the flexibility of the image display function and further meeting the higher requirements of users.
In one embodiment of the present invention, the determining an end position of the input image in the display area based on the resolution of the display screen, the start position of the input image, and the resolution of the input image includes: judging whether the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area to obtain a judgment result; and obtaining the end point position of the input image in the display area according to the judgment result.
In an embodiment of the present invention, the obtaining the end position of the input image in the display area according to the determination result includes: when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area; and when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image.
In one embodiment of the present invention, the image data of the first target image data is black image data; or the supplementing of the image data to the area of the display area other than the input image based on the resolution of the display area, and the start position and the end position of the input image in the display area to obtain the first target image data includes: determining a region of the display region other than the input image based on a resolution of the display region, a start position and an end position of the input image in the display region; and setting image data corresponding to pixel points of the area except the input image in the display area to be 0, and obtaining the first target image data.
In another aspect, an embodiment of the present invention provides an image display apparatus, including: the offset value acquisition module is used for acquiring an offset value of an input image relative to a coordinate origin of a display area on the display screen; the deviant judging module is used for judging whether the deviant is larger than zero or not; a position determination module for determining a starting position of the input image in the display area in response to the offset value being greater than zero; a position calculation module for determining an end position of the input image in the display area based on a resolution of the display area, a start position of the input image, and a resolution of the input image; the data supplementing module is used for supplementing image data to the area, except the input image, in the display area to obtain first target image data based on the resolution of the display area and the initial position and the end position of the input image in the display area; the data reading module is used for reading corresponding second target image data in the input image based on the starting position and the end position of the input image in the display area; and the data sending module is used for obtaining the image data of the display area according to the first target image data and the second target image data and sending the image data of the display area to the display screen for displaying.
In one embodiment of the invention, the position calculation module comprises: the position judging unit is used for judging whether the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area to obtain a judgment result; and the position obtaining unit is used for obtaining the end position of the input image in the display area according to the judgment result.
In an embodiment of the present invention, the position determination unit is further configured to: when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area; and when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image.
In one embodiment of the present invention, the image data of the first target image data is black image data; or the data supplement module comprises: an area determination unit configured to determine an area other than the input image in the display area based on a resolution of the display area, and a start position and an end position of the input image in the display area; and the data obtaining unit is used for setting image data corresponding to pixel points of the area except the input image in the display area to be 0 and obtaining the first target image data.
In another aspect, an embodiment of the present invention provides an image display system, including: a processor and a memory coupled to the processor; wherein the memory stores instructions for execution by the processor, and the instructions cause the processor to perform operations to perform any of the image display methods described above.
In another aspect, an embodiment of the present invention provides a computer-readable storage medium, which is a non-volatile memory and stores program codes, and when the program codes are executed by a computer, the computer implements any one of the image display methods.
As can be seen from the above, the above technical features of the present invention may have one or more of the following advantages: in the embodiment of the invention, the offset value is firstly obtained, then the size of the offset value is judged, when the offset value is larger than zero, the initial position of the display area of the input image in the display screen is obtained, the end position is calculated, the area size of the display area except the input image and the area size of the input image in the display area are determined according to the initial position and the end position, then the image data are respectively supplemented to obtain the first target image data and the second target image data, the first target image data and the second target image data are combined to obtain the image data, and then the image data are sent to the display screen for display, so that the positive offset function of the input image is realized, the display effect of the input image is improved, the flexibility of the image display function is improved, and the higher requirements of users are further met.
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 method for displaying an image according to a first embodiment of the present invention.
Fig. 2 is a flowchart illustrating the detailed steps of step S104 shown in fig. 1.
Fig. 3 is a flowchart illustrating the detailed steps of step S202 shown in fig. 2.
Fig. 4 is a flowchart illustrating a specific step of step S105 shown in fig. 1.
Fig. 5A is a schematic diagram of a display screen after an image is shifted according to a specific implementation of an image display method according to a first embodiment of the present invention.
Fig. 5B is a schematic diagram of a display screen after an image is shifted according to another embodiment of the image display method according to the first embodiment of the present invention.
Fig. 6A is a block diagram of an image display device according to a second embodiment of the invention.
Fig. 6B is a schematic diagram of the units of the position calculating module 604 in the image display apparatus shown in fig. 6A.
Fig. 6C is a block diagram of the data supplement module 605 in the image display apparatus shown in fig. 6A.
Fig. 7 is a schematic structural diagram of an image display system according to a third embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a computer-readable storage medium according to a fourth embodiment of the present invention.
[ brief description of the drawings ]
S101-S107, S201-S202, S301-S302, S401-S402, image display method steps;
501: inputting an image; 502: second target image data; 503: first target image data; 504: a starting position; 505: an end position; 506: a display area of a display screen;
600: an image display device; 601: an offset value acquisition module; 602: an offset value judging module; 603: a location determination module; 604: a position calculation module; 605: a data supplement module; 606: a data reading module; 607: a data transmission module; 6051: an area determination unit; 6052: a data obtaining unit;
700: an image display system; 701: a processor; 703: a memory;
800: a computer readable storage medium.
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.
In all embodiments of the method of the present invention, the operation is performed at the sending card terminal, where the sending card may be a display screen controller in a display system, and the sending card includes, for example, a video source input interface, such as an HDMI interface or a DVI interface, a programmable logic device, such as an FPGA, a microcontroller, such as an MCU, a memory, and an ethernet interface, such as an RJ45 interface. The sending card is used for connecting a receiving card in the display system so as to control the display screen to display pictures. Of course, the mentioned display screen controller may also be a sending device in the display system, which is a device for sending the instruction issued by the upper computer software.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a first embodiment of the present invention provides an image display method, including:
s101, acquiring an offset value of an input image relative to a coordinate origin of a display area on a display screen.
First, an offset value is obtained, where the offset value is an offset value of an input image with respect to a coordinate origin of a display area on a display screen, as shown in fig. 5B, an area indicated by 506 is a display area on the display screen, where a coordinate system is established with, for example, an upper left corner of the display area on the display screen as a coordinate origin, that is, the upper left corner of the display area is a coordinate origin position, and an offset distance of the display area of the input image on the display screen with respect to the coordinate origin of the display area is an offset value. The offset value may be a numerical value input by a user in a prompt input box of the human-computer interaction interface, or may be a numerical value obtained after relevant information is collected by upper computer software and is issued to the sending card as the offset value, so that the sending card obtains the offset value, and the source of the offset value is not limited in detail here. The offset value includes, for example, an offset value in an X direction and an offset value in a Y direction, where the X direction may be a horizontal direction and the Y direction may be a vertical direction, and for example, the offset value is X-20 and Y-10, then the input image is offset by 20 pixels in the horizontal direction and 10 pixels in the vertical direction with respect to the origin of coordinates of the display area of the display screen. The input image is read by the sending card from the memory unit line by line. After the image data of the input image is completely read, the image data of the input image may be buffered to a local buffer, such as a random access memory RAM, in the transmitting card. Through the above steps, the transmitting card completes the step of reading the image data of the input image from the memory unit.
The display screen may be an LED display screen or an OLED display screen, and is not limited herein.
And S102, judging whether the offset parameter value is larger than zero.
Then, it is determined whether the obtained offset value is greater than zero, for example, the offset value includes an offset value in an X direction and an offset value in a Y direction, where the X direction may be a horizontal direction and the Y direction may be a vertical direction, for example, the offset value is X-20 and Y-10, and then it is determined whether the offset value X is greater than zero and the value Y is greater than zero.
And S103, responding to the offset value being larger than zero, determining the starting position of the input image in the display area.
When the offset value is determined to be greater than zero, for example, the offset value includes an offset value in an X direction and an offset value in a Y direction, where the X direction may be a horizontal direction and the Y direction may be a vertical direction, and determining that the offset value is greater than zero includes: a case where the offset value X is greater than zero, the offset value Y is not less than zero, for example, X is 10, Y is 0, the offset value X is greater than zero, and the offset value Y is equal to zero, in which case the result obtained is a case where the offset value is greater than zero; the offset value X is not less than zero, the offset value Y is greater than zero, for example, X is 0, Y is 10, the offset value X is equal to zero, and the offset value Y is greater than zero, in which case the result is also the case where the offset value is greater than zero; the offset value X is larger than zero and the offset value Y is larger than zero, for example, when the offset value X is 20, Y is 10, the offset value X is larger than zero and the offset value Y is also larger than zero, the result obtained in this case is also that the offset value is larger than zero. When the offset value is determined to belong to the three cases, it can be determined that the offset value is greater than zero, that is, the offset is positive. Then, a start position of the input image in the display area is determined, that is, a position of a start pixel point of the input image in the display area is obtained, where the start position may also be a shift point position, that is, a position of a first pixel point obtained after the input image is shifted by an offset value, for example, the offset value is X equal to 20, Y equal to 10, where the X direction may be a horizontal direction, the Y direction may be a vertical direction, and then the input image is shifted by (20, 10) from an origin of coordinates of the display area, and then the position of the start pixel point of the input image in the display area is (20, 10).
And S104, determining the end position of the input image in the display area based on the resolution of the display area, the starting position of the input image and the resolution of the input image.
Calculating to obtain an end point position of the input image in the display area according to the resolution of the display area, the determined initial position of the input image, and the resolution of the input image, where the resolution of the display area may refer to a portal loading area of the display screen, for example, if the resolution of the display area is 800 × 600 pixels, the width of the portal loading area is 800 pixels, and the height of the portal loading area is 600 pixels. The resolution of the input image may be the actual size of the input image, for example, if the resolution of the input image is 400 × 200 pixels, the actual width of the input image is 400 pixels, and the actual height thereof is 200 pixels. The start position of the input image may be an offset point obtained after the input image passes through an offset value. Judging whether the resolution ratio of the display area is greater than the resolution ratio of the input image according to the sum of the initial position of the input image and the resolution ratio of the input image to obtain a judgment result; obtaining the end point position of the input image in the display area according to the determination result, wherein the offset value is, for example, X-20, Y-10, where the X-direction may be a horizontal direction and the Y-direction may be a vertical direction, the input image is offset (20, 10) with respect to the origin of coordinates of the display area, the position of the initial pixel of the input image in the display area is (20, 10), the resolution of the display area is 800 × 600 pixels, the resolution of the input image is 400 × 200 pixels, the sum of the start position of the input image and the resolution of the input image is (420, 210) and is not greater than the resolution of the display area of 800 × 600, the end position thereof is shown as 505 in fig. 5B, the end position thereof is (420, 210), the position of the end point is calculated according to the sum of the initial position of the input image and the resolution of the input image.
And S105, supplementing image data to the area except the input image in the display area based on the resolution of the display area and the initial position and the end position of the input image in the display area to obtain first target image data.
Then, the area except the input image is determined according to the resolution of the display area, that is, the resolution size of the display screen, and the start position and the end position of the input image in the display area, and then the image data is supplemented to the area except the input image to obtain the first target image data, for example, as shown by 503 in fig. 5A, or as shown by 503 in fig. 5B, that is, the image data corresponding to the pixel points of the area except the input image is set to be 0 or 1, and different values can be set according to actual requirements to supplement the image data. In this embodiment, the image data supplement may be a black image data supplement, and in other embodiments, the image data supplement may be a white image data supplement or a green image data supplement, and the like, which is not limited herein.
And S106, reading corresponding second target image data in the input image based on the starting position and the end position of the input image in the display area.
Reading second target image data in the input image based on a starting position and an end position of the input image in the display area, determining the size of the input image in the display area to be the size of the input image when the sum of the starting position of the input image and the resolution of the input image is not more than the resolution of the display area, wherein the second target image data is all image data of the input image, determining the size of the input image in the display area to be the size from the starting position to the end position of the display area when the sum of the starting position of the input image and the resolution of the input image is more than the resolution of the display area, wherein the determined size of the area is less than the size of the input image, and the second target image data is partial image data of the input image obtained based on the starting position and the end position of the input image in the display area, as shown in fig. 5A, 502 is the second target image data when the sum of the starting position of the input image and the resolution of the input image is greater than the resolution of the display area.
And S107, sending the image data of the display area to the display screen for displaying.
And then respectively obtaining image data according to the determined areas, and sending the obtained image data to a display screen so as to enable the display area on the display screen to display the image data. The method comprises the steps of firstly determining an area except an input image, namely a black image area in the application, namely an area of a non-effective image, then supplementing image data of the area except the input image, for example, setting image data corresponding to pixel points of the area except the input image to be 0, then sending the image data to a display screen, wherein the image data displayed on the display screen is the black data, then determining the area of the input image, namely the area of the effective image, reading the input image with the corresponding size from a memory unit according to the area of the effective image, then sending the read input image with the corresponding size to the display screen in a line-by-line manner, and finally displaying the image data of the display area on the display screen.
In the prior art, because the application of the negative offset function of the input image is very common, when a user needs to watch other positions of the input image, only the negative offset operation can be performed on the input image, and the positive offset operation of the input image cannot be realized, so that the display effect of the image has limitation, and the higher requirement of the user on image display cannot be met. The embodiment of the invention firstly obtains the offset value, then judges the size of the offset value, obtains the initial position of the display area of the input image in the display screen and calculates the end position when the offset value is larger than zero, then determines the area size of the display area except the input image and the area size of the input image in the display area according to the initial position and the end position, then respectively supplements the image data to obtain the first target image data and the second target image data, combines the first target image data and the second target image data to obtain the image data and then sends the image data to the display screen for display, thereby realizing the positive offset function of the input image, improving the display effect of the input image, improving the flexibility of the image display function and further meeting the higher requirements of users.
In another specific embodiment, as shown in fig. 2, the specific steps of step S104 include:
s201, judging whether the sum of the initial position of the input image and the resolution of the input image is larger than the resolution of the display area to obtain a judgment result.
Obtaining a judgment result based on whether the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, where the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, for example, the initial position of the input image in the display area is (20, 10), the resolution of the display area is 400 × 200 pixels, the resolution of the input image is 800 × 400 pixels, and the sum of the initial position of the input image and the resolution of the input image is (820, 410), which is greater than the resolution of the display area is 400 × 200 pixels; or the sum of the initial position of the input image and the resolution of the input image is not greater than the resolution of the display area, for example, the initial position of the input image in the display area is (20, 10), the resolution of the display area is 800 × 600 pixels, the resolution of the input image is 400 × 200 pixels, and the sum of the initial position of the input image and the resolution of the input image is (420, 210), and is not greater than the resolution of the display area, which is 800 × 600.
S202, obtaining the end point position of the input image in the display area according to the judgment result.
And determining the end position of the input image in the display area according to the obtained judgment result, for example, if the judgment result is that the sum of the starting position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position is obtained as the end position of the display area, for example, if the resolution of the display area is 800 × 600 pixels, the end position is (800, 600). When the determination result is that the sum of the starting position of the input image and the resolution of the input image is not greater than the resolution of the display area, the ending position is obtained as the ending position of the input image, for example, the starting position of the input image in the display area is (20, 10), the resolution of the input image is 400 × 200 pixels, and the ending position of the input image is (420, 210), that is, the ending position is obtained based on the starting position and the resolution of the input image.
In another specific embodiment, as shown in fig. 3, the specific steps of step S202 include:
s301, when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area.
When the determination result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display region, the end position of the input image in the display region is the position of the last pixel point of the display region, for example, the initial position of the input image in the display region is (20, 10), the resolution of the display region is 400 × 200 pixel points, the resolution of the input image is 800 × 400 pixel points, the sum of the initial position of the input image and the resolution of the input image is (820, 410), and if the sum is greater than the resolution of the display region, the end position is the position of the last pixel point of the display region, that is (400, 200).
And S302, when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image.
When the determination result is that the sum of the starting position of the input image and the resolution of the input image is not greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image, for example, the starting position of the input image in the display area is (20, 10), the resolution of the display area is 800 × 600 pixels, the resolution of the input image is 400 × 200 pixels, the sum of the starting position of the input image and the resolution of the input image is (420, 210), and the end position is not greater than the resolution of the display area 800 × 600, and then the end position is the sum of the starting position of the input image and the resolution of the input image, that is (420, 210).
In another specific embodiment, as shown in fig. 4, the specific steps of step S105 include:
s401, determining the area of the display area except the input image based on the resolution of the display area and the starting position and the end position of the input image in the display area.
Then, an area other than the input image, that is, a black image data area (or a black-edge area), for example, an area indicated by 503 in fig. 5A or an area indicated by 503 in fig. 5B, is determined according to the resolution of the display area, that is, the resolution size of the display screen, and the start position and the end position of the input image in the display area.
S402, setting image data corresponding to pixel points of the area except the input image in the display area to be 0, and obtaining the first target image data.
After the area except the input image is determined, setting image data corresponding to pixel points in the area except the input image as 0, that is, the image data in the area except the input image is all 0, then taking the image data with the value of 0 as first target image data, that is, the image data with the value of 0 is represented as black data on a display screen.
For the sake of better understanding of the present embodiment, the following describes the image display method of the present embodiment in detail with reference to fig. 5A to 5B.
As shown in fig. 5A-5B, in this embodiment, the execution main body is a sending card, where the sending card may be a display screen controller in an LED display system, or may be an FPGA.
Firstly, an FPGA acquires an offset value of an input image relative to an origin of coordinates in a display area 506 of a display screen, where the FPGA is, for example, a programmable logic device, and image data of the input image may be read by the FPGA from a memory unit, where the input image is read by the FPGA from the memory unit line by line. After the image data of the input image is completely read out, the image data of the input image can be firstly cached in a local cache in the FPGA, for example, a random access memory RAM. Through the steps, the FPGA finishes the step of reading the image data of the input image from the memory unit. For example, the origin of coordinates is the upper left corner of the display area 506 of the display screen, and the offset value is, for example, X equal to 20 and Y equal to 10, where X is an offset value in the horizontal direction and Y is an offset value in the vertical direction, then the input image 501 is offset by 20 pixels in the horizontal direction and 10 pixels in the vertical direction relative to the origin of coordinates of the display area of the display screen.
Then, according to the obtained offset value, determining whether the offset value is greater than zero, where determining that the offset value is greater than zero includes: a case where the offset value X is greater than zero, the offset value Y is not less than zero, for example, X is 10, Y is 0, the offset value X is greater than zero, and the offset value Y is equal to zero, in which case the result obtained is a case where the offset value is greater than zero; the offset value X is not less than zero, the offset value Y is greater than zero, for example, X is 0, Y is 10, the offset value X is equal to zero, and the offset value Y is greater than zero, in which case the result is also the case where the offset value is greater than zero; the offset value X is larger than zero and the offset value Y is larger than zero, for example, when the offset value X is 20, Y is 10, the offset value X is larger than zero and the offset value Y is also larger than zero, the result obtained in this case is also that the offset value is larger than zero.
When the offset value is determined to have the three determination results, it can be determined that the offset value is greater than zero, and at this time, the FPGA can determine the start position of the input image 501 in the display area 506 of the display screen, for example, as shown in fig. 5A and 5B, the offset value is X-20, Y-10, where X is the offset value in the horizontal direction, and Y is the offset value in the vertical direction, and when the input image 501 is offset by (20, 10) pixels from the origin of coordinates of the display area, the start position 504 of the input image in the display area is (20, 10). Then, the FPGA reads the initial storage position corresponding to the initial position of the input image from the memory unit, that is, reads the position of the input image initially stored in the memory unit, where the position of the input image initially stored in the memory unit is (0, 0), and the FPGA reads the input image from the (0, 0) position of the memory unit.
After the initial position 504 of the input image in the display area is determined, the resolution of the display area 506 of the display screen is obtained, as shown in fig. 5A, the resolution of the display area 506 of the display screen is 400 × 200 pixels, as shown in fig. 5B, the resolution of the display area 506 of the display screen is 800 × 600 pixels, then whether the resolution is greater than the resolution of the display area is judged based on the sum of the initial position 504 of the input image and the resolution of the input image to obtain a judgment result, and the end position of the input image in the display area is obtained according to the judgment result.
Then, determining an area outside the input image according to the initial position, the end position and the resolution of the display area of the input image in the display area, then supplementing the image data of the area outside the input image to obtain first target image data, then determining the area size of the input image in the display area according to the initial position and the end position of the input image in the display area, reading corresponding second target image data in the input image according to the area size of the input image in the display area, then sending the first target image data and sending the read corresponding second target image data in the input image to a display screen, and obtaining the image data of the display area 506 by the display screen and then displaying the image data.
As shown in fig. 5A, the resolution of the display area 506 is 400 × 200 pixels, the resolution of the input image 501 is 600 × 400 pixels, the starting position is (20, 10), the sum of the starting position 504 of the input image and the resolution of the input image is greater than the resolution of the display area, the end position 505 is the last pixel position (400, 200) of the display area, then the area of the display area except the input image is determined according to the resolution of the display area, the starting position and the end position of the input image in the display area, then the area except the input image is supplemented with image data to obtain the first target image data 503 in the display area, for example, the first target image data 503 is supplemented with black image data, then the first target image data 503 is supplemented according to the starting position (20, 10) and the end position (400, 200) determining the area size of the input image in the display area, reading the corresponding size of the input image according to the area size of the input image in the display area to obtain second target image data 502, i.e. the image data in the area from the starting position of the input image to the end position of the display area, then directly sending the first target image data 503 to the display screen in rows, i.e. the first target image data 503 is sent in rows and lines, then reading the image data of the input image corresponding to the area size of the input image in the display area from the memory unit, i.e. the second target image data 502 is also sent to the display screen in rows, then combining the image data with the display area 506 of the display screen, and then displaying the image on the display screen, i.e. obtaining the image with the size as shown in 506 in fig. 5A on the display screen, the image data includes first target image data 502 and second target image data 503.
As shown in fig. 5B, the resolution of the display area 506 is 800 × 600 pixels, the resolution of the input image 502 is 400 × 200 pixels, the starting position is (20, 10), the sum of the starting position 504 of the input image and the resolution of the input image is not greater than the resolution of the display area, the end position 505 is the last pixel point position (420, 210) of the input image, then the first target image data 502, which is all image data of the input image, is determined according to the starting position (20, 10) and the end position (420, 210), then the area of the display area except the input image is determined according to the resolution of the display area, the starting position and the end position of the input image in the display area, then the first target image data 503 in the display area is obtained by supplementing image data to the area except the input image, for example, black image data supplementation is performed on first target image data 503, then the area size of an input image in a display area is determined according to a starting position and an end position, namely the input image size, and second target image data 502 is obtained by reading, then the first target image data 503 is directly sent to a display screen in a line-by-line manner, namely the first target image data 503 is sent in a line-by-line manner, then image data of the input image corresponding to the area size of the input image in the display area is read from a memory unit, namely the whole size of the input image is read as the second target image data 502, the second target image data 502 is also sent to the display screen in a line-by-line manner, then image data with the same size as the display area 506 of the display screen is obtained by combining, and then the image data is packed and sent to the display area of the display screen for image display, that is, what is obtained on the display screen is an image of the size shown as 506 in fig. 5B, which includes the first target image data 503 and the second target image data 502.
Since the input image is subjected to the positive shift operation, an area other than the input image exists in the display area of the display screen, the area cannot transmit image data of the display area, and other image data supplementary processing is performed in advance, that is, first target image data, for example, black image data processing is performed on the first target image data. Therefore, the size of the area except the area of the input image outside the display area is determined, then the size of the area of the input image in the display area is determined, then image data supplementation is performed according to the size of the area except the area of the input image outside the display area to obtain first target image data 503, the first target image data 503 is sent line by line, then until the first target image data is sent to the area of the input image, image data corresponding to the size of the area of the input image in the display area, namely second target image data 502 is read, then the second target image data 502 is sent line by line, then the first target image data 503 and the second target image data 502 form a network packet, and then the network packet is sent to a display screen for display.
In summary, in the prior art, since the application of the negative offset function of the input image is very common, when a user needs to view other positions of the input image, only the negative offset operation can be performed on the input image, and the positive offset operation of the input image cannot be realized, so that the display effect of the image is limited, and the higher requirement of the user on the image display cannot be met. The embodiment of the invention firstly obtains the offset value, then judges the size of the offset value, obtains the initial position of the display area of the input image in the display screen and calculates the end position when the offset value is larger than zero, then determines the area size of the display area except the input image and the area size of the input image in the display area according to the initial position and the end position, then respectively supplements the image data to obtain the first target image data and the second target image data, combines the first target image data and the second target image data to obtain the image data and then sends the image data to the display screen for display, thereby realizing the positive offset function of the input image, improving the display effect of the input image, improving the flexibility of the image display function and further meeting the higher requirements of users.
[ second embodiment ]
As shown in fig. 6A, an image display device 600 according to a second embodiment of the present invention includes: an offset value obtaining module 601, an offset value judging module 602, a position determining module 603, a position calculating module 604, a data supplementing module 605, a data reading module 606, and a data sending module 607.
The offset value obtaining module 601 is configured to obtain an offset value of an input image with respect to a coordinate origin of a display area on a display screen; an offset value determining module 602, configured to determine whether the offset value is greater than zero; a position determining module 603, configured to determine a starting position of the input image in the display area in response to the offset value being greater than zero; a position calculation module 604 for determining an end position of the input image in the display area based on the resolution of the display area, the start position of the input image, and the resolution of the input image; a data supplementing module 605, configured to supplement, based on the resolution of the display area and the start position and the end position of the input image in the display area, image data of an area other than the input image in the display area to obtain first target image data; a data reading module 606, configured to read corresponding second target image data in the input image based on a start position and an end position of the input image in the display area; a data sending module 607, configured to obtain the image data of the display area according to the first target image data and the second target image data, and send the image data of the display area to the display screen for display.
Further, as shown in fig. 6B, the position calculating module 604 includes, for example: a position determination unit 6041 configured to determine whether a sum of a start position of the input image and a resolution of the input image is greater than a resolution of the display area to obtain a determination result; a position obtaining unit 6042, configured to obtain the end position of the input image in the display area according to the determination result.
Further, the position determination unit 6041 is also configured to: when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area; when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image,
further, as shown in fig. 6C, the data supplement module 605 includes, for example: a region determination unit 6051 configured to determine a region other than the input image in the display region based on a resolution of the display region, a start position and an end position of the input image in the display region; a data obtaining unit 6052 configured to set image data corresponding to pixel points of an area other than the input image in the display area to 0 and obtain the first target image data.
The image display method implemented by the image display device disclosed in this embodiment is as described in the first embodiment, and therefore, will not be described in detail herein. Optionally, each module and the other operations or functions in the second embodiment are respectively for implementing the method in the first embodiment of the present invention, and the beneficial effects of this embodiment are the same as those of the first embodiment, and are not described herein again for brevity.
[ third embodiment ]
As shown in fig. 7, a third embodiment of the present invention provides an image display system 700, including: a processor 701 and a memory 703; the memory 703 stores instructions executed by the processor 701, and the instructions cause the processor 701 to perform operations to perform the image display method according to the first embodiment.
[ fourth example ] A
As shown in fig. 8, a computer-readable storage medium 800 according to a fourth embodiment of the present invention is a non-volatile memory and stores program codes, and when the program codes are executed by one or more processors, the one or more processors are caused to execute the image display method according to the first embodiment.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and technical solutions of the embodiments can be arbitrarily combined and used without conflict between technical features and structures, and without departing from the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules 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/modules described as separate parts may or may not be physically separate, and parts displayed as units/modules may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units/modules may be selected according to actual needs to achieve the purpose of the solution of the present 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 according to the embodiments of the present invention. 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. An image display method, comprising:
acquiring an offset value of an input image relative to a coordinate origin of a display area on a display screen;
judging whether the offset value is larger than zero;
in response to the offset value being greater than zero, determining a starting position of an input image in the display area;
determining an end position of the input image in the display area based on a resolution of the display area, a start position of the input image, and a resolution of the input image;
supplementing image data to the area, except the input image, in the display area based on the resolution of the display area and the starting position and the end position of the input image in the display area to obtain first target image data;
reading corresponding second target image data in the input image based on the starting position and the end position of the input image in the display area;
and obtaining the image data of the display area according to the first target image data and the second target image data, and sending the image data of the display area to the display screen for displaying.
2. The image display method according to claim 1, wherein the determining an end position of the input image in the display area based on the resolution of the display screen, the start position of the input image, and the resolution of the input image comprises:
judging whether the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area to obtain a judgment result;
and obtaining the end point position of the input image in the display area according to the judgment result.
3. The image display method according to claim 2, wherein the obtaining of the end position of the input image in the display area according to the determination result includes:
when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area;
and when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image.
4. The image display method according to claim 1, wherein the image data of the first target image data is black image data; or
The supplementing of image data to the area of the display area other than the input image based on the resolution of the display area, and the start position and the end position of the input image in the display area to obtain first target image data includes:
determining a region of the display region other than the input image based on a resolution of the display region, a start position and an end position of the input image in the display region;
and setting image data corresponding to pixel points of the area except the input image in the display area to be 0, and obtaining the first target image data.
5. An image display apparatus, comprising:
the offset value acquisition module is used for acquiring an offset value of an input image relative to a coordinate origin of a display area on the display screen;
the deviant judging module is used for judging whether the deviant is larger than zero or not;
a position determination module for determining a starting position of the input image in the display area in response to the offset value being greater than zero;
a position calculation module for determining an end position of the input image in the display area based on a resolution of the display area, a start position of the input image, and a resolution of the input image;
the data supplementing module is used for supplementing image data to the area, except the input image, in the display area to obtain first target image data based on the resolution of the display area and the initial position and the end position of the input image in the display area;
the data reading module is used for reading corresponding second target image data in the input image based on the starting position and the end position of the input image in the display area;
and the data sending module is used for obtaining the image data of the display area according to the first target image data and the second target image data and sending the image data of the display area to the display screen for displaying.
6. The image display device according to claim 5, wherein the position calculation module includes:
the position judging unit is used for judging whether the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area to obtain a judgment result;
and the position obtaining unit is used for obtaining the end position of the input image in the display area according to the judgment result.
7. The image display device according to claim 6, wherein the position determination unit is further configured to:
when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is greater than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the display area;
and when the judgment result is that the sum of the initial position of the input image and the resolution of the input image is not more than the resolution of the display area, the end position of the input image in the display area is the position of the last pixel point of the input image.
8. The image display apparatus according to claim 5, wherein the image data of the first target image data is black image data; or
The data supplement module comprises:
an area determination unit configured to determine an area other than the input image in the display area based on a resolution of the display area, and a start position and an end position of the input image in the display area;
and the data obtaining unit is used for setting image data corresponding to pixel points of the areas except the input image in the display area to be 0 and obtaining the first target image data.
9. An image display system, comprising: a processor and a memory coupled to the processor; wherein the memory stores instructions for execution by the processor and the processor is configured to execute the instructions to perform an image display method as claimed in any one of claims 1 to 4.
10. A computer-readable storage medium, comprising:
a non-volatile memory;
wherein the non-volatile memory stores program code that, when executed by a computer, implements the image display method according to any one of claims 1 to 4.
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