CN115620665A - Image processing method and display device - Google Patents

Image processing method and display device Download PDF

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Publication number
CN115620665A
CN115620665A CN202110806208.2A CN202110806208A CN115620665A CN 115620665 A CN115620665 A CN 115620665A CN 202110806208 A CN202110806208 A CN 202110806208A CN 115620665 A CN115620665 A CN 115620665A
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China
Prior art keywords
image
area
size
screen
processing circuit
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Pending
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CN202110806208.2A
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Chinese (zh)
Inventor
林育蔚
黄俊豪
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Realtek Semiconductor Corp
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Realtek Semiconductor Corp
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Priority to CN202110806208.2A priority Critical patent/CN115620665A/en
Publication of CN115620665A publication Critical patent/CN115620665A/en
Pending legal-status Critical Current

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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]
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

An image processing method is suitable for a display device with a processing circuit and a screen, and comprises the following steps: receiving a first image from one of a plurality of electronic devices; detecting whether the first image has a black edge area; and if the first image has the black border area, executing a first display operation, wherein the executing the first display operation comprises: removing the black edge area of the first image to generate a second image; adjusting the size of the second image according to the size of a display area of the screen; calculating a first blank area of the screen based on the adjusted second image; requesting a third image from the other one of the electronic devices according to the size of the first blank area; and filling the display area of the screen with the adjusted second image and the adjusted third image.

Description

Image processing method and display device
Technical Field
The present disclosure relates to a display device and an image processing method, and more particularly, to a display device and an image processing method capable of displaying a plurality of images from a plurality of electronic devices simultaneously.
Background
When the conventional display device simultaneously displays images from different devices, the following problems are easily encountered:
1. to adjust the image scale, the image scale needs to be manually set in an OSD (On Screen Display) manner.
2. If the mobile device (such as a smart phone, a tablet computer, etc.) is used, the display screen has a black border, which results in low utilization rate of the screen and unclear image content.
Disclosure of Invention
Another aspect of the present disclosure is an image processing method. The image processing method is suitable for a display device with a processing circuit and a screen, and comprises the following steps: receiving, by the processing circuit, a first image from one of the plurality of electronic devices; detecting whether the first image has a black border area by the processing circuit; and if the first image has the black border area, executing a first display operation by the processing circuit, wherein the executing the first display operation comprises: removing the black edge area of the first image to generate a second image; adjusting the size of the second image according to the size of a display area of the screen; calculating a first blank area of the screen based on the adjusted second image; requesting a third image from another one of the electronic devices according to the size of the first blank area; and filling the display area of the screen with the adjusted second image and the adjusted third image.
One aspect of the present disclosure is a display device. The display device comprises a processing circuit and a screen. The screen has a display area. The processing circuit is coupled to the screen and used for: receiving a first image from one of a plurality of electronic devices; detecting whether the first image has a black border area; and if the first image has the black border area, executing a first display operation, wherein the executing the first display operation comprises: removing the black edge area of the first image to generate a second image; adjusting the size of the second image according to the size of the display area; calculating a first blank area of the screen based on the adjusted second image; requesting a third image from the other one of the electronic devices according to the size of the first blank area; and filling the display area of the screen with the adjusted second image and the adjusted third image.
The display device of the present disclosure processes an image having a black border through an image processing method to remove the black border and adjust the image size in an equal proportion. In addition, the display device calculates a blank area of the screen through the image processing method so as to request an image which has the same size as the blank area and has no black edge from the specific electronic device. Therefore, when the display device is connected to the mobile device (such as a smart phone, a tablet computer or wearable equipment) and other different electronic devices (such as a desktop computer), a full-screen display effect without black edges can be achieved on the screen, the screen utilization rate of the screen is improved, and the problem of screen distortion is avoided.
Drawings
Fig. 1 is a block diagram of a display device according to some embodiments of the disclosure.
Fig. 2 is a flowchart illustrating an image processing method according to some embodiments of the disclosure.
Fig. 3-6 are schematic diagrams illustrating an implementation process of an image processing method according to some embodiments of the disclosure.
Detailed Description
The following embodiments are described in detail with reference to the accompanying drawings, but the embodiments are only used for explaining the present disclosure and not for limiting the present disclosure, and the description of the structural operation is not used for limiting the execution sequence thereof, and any structure obtained by recombining the elements and having equivalent functions is covered by the present disclosure.
The term (terms) used throughout the specification and claims has the ordinary meaning as commonly understood in the art, in the disclosure herein and in the specific disclosure herein, unless otherwise indicated.
As used herein, the term "couple" or "connect" refers to two or more elements being in direct or indirect physical or electrical contact with each other, and may also refer to two or more elements being in mutual operation or action.
Referring to fig. 1, fig. 1 is a block diagram illustrating a display device 100 according to some embodiments of the disclosure. The display device 100 includes a processing circuit 110 and a screen 120. In some embodiments, the display device 100 may be, for example, but not limited to, a liquid crystal display (lcd) or an Organic Light Emitting Diode (OLED) display.
Structurally, the processing circuit 110 is coupled to the screen 120. Specifically, the processing circuit 110 is used for receiving and processing a plurality of images from a plurality of electronic devices. For simplicity and convenience of illustration, only the electronic device 10 and the electronic device 12 are shown in fig. 1, but the disclosure is not limited thereto. These images are processed by the processing circuit 110 and then displayed on the screen 120 for the user to view. In the embodiment, the processing circuit 110 may be implemented by a scaler (scaler), but the disclosure is not limited thereto. In the present embodiment, the electronic device 10 may be, for example and without limitation, a smart phone, and the electronic device 12 may be, for example and without limitation, a desktop computer or a notebook computer. In other embodiments, the electronic device 10 is a mobile device such as a tablet computer or a wearable device.
Referring to fig. 2, fig. 2 illustrates an image processing method 200 according to some embodiments of the present disclosure. The image processing method 200 can be executed by the processing circuit 110 in the display device 100 shown in fig. 1, so that different images from different electronic devices can be displayed on the screen 120 at the same time. In some embodiments, the image processing method 200 includes operations S201-S207. For convenience of explanation, the image processing method 200 will be described with reference to fig. 1 and fig. 3-6.
In operation S201, the processing circuit 110 receives a first image 30 from an electronic device 10 (i.e., one of a plurality of electronic devices). Referring to fig. 3, a comparison between the display area of the screen 120 (i.e., the area enclosed by the solid line) and the first image 30 (i.e., the area enclosed by the dashed line) is shown. At this time, the first image 30 is not displayed in the display area of the screen 120, and fig. 3 illustrates the first image 30 in the display area of the screen 120 for convenience of explaining the size relationship and the resolution difference between the first image 30 and the display area of the screen 120. It is understood that the electronic device 10 generally displays images in a portrait orientation (since it is a narrow screen), but in order to match the screen 120 displaying images in a landscape orientation (i.e., it is a wide screen), the first image 30 input to the display device 100 will have a format suitable for landscape display. Specifically, if the screen of the electronic device 10 displays an image of 750 × 1334 pixels (corresponding to an image with a width-to-length ratio of 9. In the embodiment of fig. 3, the first image 30 includes an image area 301 and two black border areas 303 (i.e., areas filled with oblique lines). The image area 301 is an image actually displayed on the screen of the electronic device 10, and the data values of all the pixels of the image area do not all correspond to the lowest gray level (e.g., 0). In addition, the black border region 303 is a non-image region (or a data-free region) that is merged into the image region 301 for the electronic device 10 to generate the first image 30, and the data values of all the pixels thereof correspond to the lowest gray level.
In operation S202, the processing circuit 110 detects whether the first image 30 has a black border region. To detect whether the first image 30 has a black border region, the processing circuit 110 first scans all pixels of the first image 30 to obtain a plurality of data values corresponding to the pixels. In some embodiments, the display device 100 may store the received first image 30 in a memory circuit (not shown), such as a flash memory, and the processing circuit 110 accesses the first image 30 from the memory circuit to perform operation S202. Then, the processing circuit 110 searches the image area 301 according to the distribution of the data values. In the embodiment of fig. 3, the processing circuit 110 sequentially scans each row of pixels in the first image 30 having 1334 × 750 pixels and records the data value distribution of each row of pixels. For example, in the nth row of pixels (where n ranges from 1 to 750), the data values of the 1 st to 456 th and 879 th to 1334 th pixels are all 0, but the data values of the 457 th to 878 th pixels are not all 0. In this example, if the data values of the pixels from 1 st to 456 th and from 879 th to 1334 th in the other rows are all 0, the processing circuit 110 uses the pixels from the 1 st row, the pixels from the 750 th row, the pixels from the 457 th column and the pixels from the 878 th column as the four boundaries of the image area 301 to search the image area 301 from the first image 30.
In other words, the horizontal boundary of the image area 301 may be the 1 st row or the last row of pixels, and the vertical boundary of the image area 301 may be a row in which the data values of the pixels of an adjacent row are all 0 but the data values of the pixels themselves are not all 0.
After the image area 301 is found, the processing circuit 110 further compares the sizes of the first image 30 and the image area 301. In the embodiment of fig. 3, the size of the image area 301 is smaller than that of the first image 30, so the processing circuit 110 determines that the first image 30 has the black border area 303 and performs operation S203.
In operation S203, the processing circuit 110 removes the black border region 303 of the first image 30 to generate the second image 40. Referring to fig. 4, a schematic diagram of the display area (i.e., the area enclosed by the solid line) of the screen 120 and the second image 40 (i.e., the area enclosed by the dashed line) is shown. At this time, the second image 40 is not displayed in the display area of the screen 120, and fig. 4 shows the second image 40 in the display area of the screen 120, which is only for convenience of explaining the size relationship and the resolution difference between the second image 40 and the display area of the screen 120. In the foregoing example, in the process of removing the black border, the processing circuit 110 would cut out the 1334 × 750 pixel first image 30 while preserving the image area 301 to form the 422 × 750 pixel second image 40. In other words, the black border region 303 in the first image 30 is cut out, and the second image 40 only includes the image region 301.
In operation S204, the processing circuit 110 adjusts the size of the second image 40 proportionally according to the size of the display area of the screen 120. Referring to fig. 5, a display area (i.e., an area surrounded by a solid line), a blank area 121 (i.e., an area surrounded by a dotted line) and an adjusted second image (i.e., the image 50) of the screen 120 are shown. At this time, the image 50 is not displayed in the display area of the screen 120, and fig. 5 shows the image 50 in the display area of the screen 120 only for convenience of explaining the size relationship and the resolution difference between the image 50 and the display area of the screen 120. Assuming that the vertical side of the display area of the screen 120 is 1080 pixels, the processing circuit 110 may enlarge the 422 × 750 pixels of the second image 40 in equal proportion to form a 607 × 1080 pixels of the second image 50 (i.e., the area surrounded by the dotted line). In other words, after the adjustment of the processing circuit 110, the vertical side length of the image 50 is equal to the vertical side length of the display area of the screen 120. Accordingly, as shown in fig. 5, when the image 50 is displayed on the screen 120 in a subsequent operation, no black border is generated in the vertical direction.
In operation S205, the processing circuit 110 calculates the blank area 121 of the screen 120 based on the adjusted second image (i.e., the image 50). In this example, the blank area 121 indicates that the display area of the screen 120 can display the remaining area of other frames after the image 50 is displayed. Specifically, assuming that the screen 120 can display the largest image of 3840 × 1080 pixels, the processing circuit 110 subtracts the largest image displayable on the screen 120 from the image 50 of 607 × 1080 pixels, and then finds that the size of the blank area 121 of the screen 120 is 3233 × 1080 pixels.
In operation S206, the processing circuit 110 requests the electronic device 12 (i.e., another one of the electronic devices) for a third image 60 according to the size of the blank area 121. Referring to fig. 6, a schematic diagram of the adjusted second image (i.e., image 50) and the third image 60 displayed in the display area of the screen 120 is shown. Specifically, the processing circuit 110 can send a signal to the electronic device 12 via itself or a communication device (not shown) of the Display device 100, wherein the signal can include Extended Display Identification Data (EDID) corresponding to the size of the blank area 121. Accordingly, the electronic device 12 can provide the third image 60 with the same size as the blank area 121 and without black edges to the processing circuit 110 through the signal.
After receiving the third image 60, the processing circuit 110 performs operation S207. In operation S207, as shown in fig. 6, the processing circuit 110 fills the display area of the screen 120 with the adjusted second image (i.e., the image 50) and the adjusted third image 60 to form a full frame without black borders on the screen 120. It is understood that there is a gap between each of the images 50 and 60 and the display area of the screen 120 as shown in fig. 6, but this is only for clarity and convenience of description. In practical applications, there should be no gap between the image 50 and the third image 60 and the display area of the screen 120, i.e. the image 50 and the third image 60 will form a full-page picture without black borders on the screen 120.
In other embodiments, operation S206 is replaced by another operation. In the other operation, the processing circuit 110 receives an image (e.g., having 1920 × 1080 pixels) from the electronic device 12, which is preset by the electronic device 12 to be transmitted to the display device 100, and the size of the image is not equal to the blank area 121 (i.e., having 3233 × 1080 pixels). After receiving the image, the processing circuit 110 may adjust the image in an unequal proportion so that the adjusted image has a size equal to the size of the blank area 121. Accordingly, the processing circuit 110 can then perform operation S207 to fill the display area of the screen 120 with the adjusted second image (i.e., the image 50) and the adjusted image. Compared to this embodiment (i.e., the processing circuit 110 adjusts the image in unequal proportion), the embodiment of performing operation S206 can avoid the problem of frame distortion.
Referring to fig. 2 again, in other embodiments, the user may use the electronic device 10 (e.g., a smart phone or a tablet computer) in a horizontal manner, so that the first image received by the display device 100 is an image without black edges. In this way, the size of the image area is the same as the size of the first image, and therefore the processing circuit 110 determines that the first image is a frame without a black border area in operation S202. Accordingly, the processing circuit 110 directly performs operations S204 to S207. In operation S204, the processing circuit 110 adjusts the size of the first image proportionally according to the size of the display area of the screen 120. In operation S205, the processing circuit 110 calculates another blank area (different from the blank area 121) of the screen 120 based on the adjusted first image. In operation S206, the processing circuit 110 requests another third image (with a size different from the third image 60) from the electronic device 12 according to the size of the another blank area. In operation S207, the processing circuit 110 fills the display area of the screen 120 with the adjusted first image and another third image. The rest of the description is similar to the previous embodiment and is not repeated here.
In summary, the display device 100 of the present disclosure processes the image with black borders through the image processing method 200 to remove the black borders and adjust the image size proportionally. In addition, the display device 100 calculates the blank area of the screen 120 through the image processing method 200 to request the specific electronic device for an image with the same size as the blank area and without black borders. In this way, when the display device 100 is connected to a mobile device (e.g., a smart phone, a tablet computer, or a wearable device) and other different electronic devices (e.g., a desktop computer), a full-screen display effect without black edges can be achieved on the screen 120, the screen utilization rate of the screen 120 can be improved, and the problem of screen distortion can be avoided.
Although the present disclosure has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the disclosure, and therefore, the scope of the disclosure should be determined by that defined in the appended claims.
Description of the symbols
10,12: electronic device
30: the first image
40: second image
50: image forming method
60: third image
100: display device
110: processing circuit
120: screen
121: blank area
200: image processing method
301: image area
303: black border area
S201 to S207: operation of

Claims (10)

1. An image processing method is suitable for a display device with a processing circuit and a screen, and comprises the following steps:
receiving, by the processing circuit, a first image from one of the plurality of electronic devices;
detecting whether the first image has a black border area by the processing circuit; and
if the first image has the black border region, executing a first display operation by the processing circuit, wherein the executing the first display operation comprises:
removing the black edge area of the first image to generate a second image;
adjusting the size of the second image according to the size of a display area of the screen;
calculating a first blank area of the screen based on the adjusted second image;
requesting a third image from another one of the electronic devices according to the size of the first blank area; and
filling the display area of the screen with the adjusted second image and the adjusted third image.
2. The image processing method as claimed in claim 1, further comprising:
if the first image does not have the black border area, executing a second display operation by the processing circuit, wherein the executing the second display operation comprises:
adjusting the size of the first image according to the size of the display area;
calculating a second blank area of the screen based on the adjusted first image;
requesting a fourth image from the other one of the electronic devices according to the size of the second blank area; and
filling the display area of the screen with the adjusted first image and the fourth image.
3. The image processing method of claim 1, wherein detecting whether the first image has the black border region comprises:
scanning a plurality of pixels of the first image by the processing circuit to obtain a plurality of data values corresponding to the pixels;
searching an image area according to the distribution of the data values by the processing circuit; and
if the size of the image area is different from the size of the first image, the processing circuit determines that the first image has the black border area.
4. The method as claimed in claim 3, wherein the data values of all the pixels in the black border region correspond to the lowest gray level, and the data values of all the pixels in the image region do not correspond to the lowest gray level.
5. The image processing method as claimed in claim 3, further comprising:
if the size of the image area is the same as the size of the first image, the processing circuit determines that the first image does not have the black border area.
6. A display device, comprising:
a screen having a display area; and
a processing circuit, coupled to the screen, for:
receiving a first image from one of a plurality of electronic devices;
detecting whether the first image has a black edge area; and
if the first image has the black border area, executing a first display operation, wherein the executing the first display operation comprises:
removing the black edge area of the first image to generate a second image;
adjusting the size of the second image according to the size of the display area;
calculating a first blank area of the screen based on the adjusted second image;
requesting a third image from another one of the electronic devices according to the size of the first blank area; and
filling the display area of the screen with the adjusted second image and the adjusted third image.
7. The display device of claim 6, wherein the processing circuit is further configured to:
if the first image does not have the black border area, executing a second display operation, wherein the executing the second display operation comprises:
adjusting the size of the first image according to the size of the display area;
calculating a second blank area of the screen based on the adjusted first image;
requesting a fourth image from the other one of the electronic devices according to the size of the second blank area; and
filling the display area of the screen with the adjusted first image and the adjusted fourth image.
8. The display device of claim 6, wherein in detecting whether the first image has the black border region, the processing circuit is configured to:
scanning a plurality of pixels of the first image to obtain a plurality of data values corresponding to the pixels;
searching an image area according to the distribution of the data values; and
if the size of the image area is different from the size of the first image, the first image is judged to have the black edge area.
9. The display device of claim 8, wherein the data values of all pixels in the black border region correspond to the lowest gray level, and the data values of all pixels in the image region do not correspond to the lowest gray level.
10. The display device of claim 8, wherein the processing circuit is further configured to:
if the size of the image area is the same as that of the first image, the first image is judged not to have the black border area.
CN202110806208.2A 2021-07-16 2021-07-16 Image processing method and display device Pending CN115620665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110806208.2A CN115620665A (en) 2021-07-16 2021-07-16 Image processing method and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110806208.2A CN115620665A (en) 2021-07-16 2021-07-16 Image processing method and display device

Publications (1)

Publication Number Publication Date
CN115620665A true CN115620665A (en) 2023-01-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110806208.2A Pending CN115620665A (en) 2021-07-16 2021-07-16 Image processing method and display device

Country Status (1)

Country Link
CN (1) CN115620665A (en)

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