WO2020056744A1 - 拖影评价、改善方法和电子设备 - Google Patents

拖影评价、改善方法和电子设备 Download PDF

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Publication number
WO2020056744A1
WO2020056744A1 PCT/CN2018/107056 CN2018107056W WO2020056744A1 WO 2020056744 A1 WO2020056744 A1 WO 2020056744A1 CN 2018107056 W CN2018107056 W CN 2018107056W WO 2020056744 A1 WO2020056744 A1 WO 2020056744A1
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WIPO (PCT)
Prior art keywords
smear
image
display screen
pixel
pixel value
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Application number
PCT/CN2018/107056
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English (en)
French (fr)
Inventor
吴欣凯
严鸿康
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880094463.5A priority Critical patent/CN112262427B/zh
Priority to PCT/CN2018/107056 priority patent/WO2020056744A1/zh
Publication of WO2020056744A1 publication Critical patent/WO2020056744A1/zh

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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
    • G09G3/34—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details

Definitions

  • the present application relates to the field of display technology, and in particular, to a smear evaluation and improvement method and an electronic device.
  • the display screen can visually display various types of information to the user, so it is widely used.
  • the display screen is full of all aspects of daily life, such as mobile phones, tablet computers, TVs, elevator advertising TVs and so on.
  • the moving object may cause smear on the display screen, and the smear may seriously affect the viewing experience of the user. How to accurately judge the degree of smear has become an important basis for judging the quality of the display screen.
  • the method of judging the degree of smear on a display screen is mainly to use a high-speed camera to capture the display of a moving object.
  • the degree of smear on different displays is measured according to the smear length and the duration of the smear on the display screen. The shorter the smear length and the shorter the smear duration, the better the display quality.
  • OLED Organic Light-Emitting Diode
  • the present application provides an smear evaluation, an improvement method, and an electronic device, which can accurately evaluate the smear degree of an OLED display.
  • a smear evaluation method including: obtaining, by a terminal device, a first image when the display is smeared and a second image before / after the display is smeared, and then according to the first image and the second image
  • the smear area is determined in the first image
  • the reference area having the same position as the smear area is determined in the second image. It can be understood that there is no smear in the reference area.
  • the terminal device can evaluate the degree of smear of the display screen according to the smear area and the reference area.
  • the smearing degree of the display screen According to the obtained first image with smear and the second image without smear, and according to the smear area of the smear area in the first image and the corresponding reference area in the second image, it can be determined The smearing degree of the display screen.
  • the smearing evaluation method in this embodiment can be applied to any display screen, and solves the problem that the smearing length and the duration of the smearing are currently not applicable to the OLED display when evaluating the smearing degree of the display screen. .
  • the process in which the terminal device acquires the first parameter indicating the degree of smear on the display screen may specifically include: the terminal device obtains a pixel value of a pixel in the smear area. And the difference between the pixel values of the pixel points in the reference area; the difference is used as the first parameter of the display screen.
  • the second display screen is an image before smearing
  • the larger the difference is the lighter the smearing degree of the display screen is, and the higher the display quality is.
  • the second display screen is a smeared image
  • the smaller the difference is the lighter the smear degree of the display screen is, and the higher the display quality is.
  • the terminal device acquires a ratio of the difference value to a pixel value of a pixel in the reference area, and uses the ratio as the first parameter of the display screen.
  • the pixels belonging to the smear in the first image constitute a smear area
  • the reference area in the second image is an area having the same coordinate information as the smear area in the first image.
  • the ratio as the first parameter of the display screen, the interference of the sensor exposure value of the high-speed camera on the first parameter is avoided, and the accuracy of the first parameter is improved.
  • the pixel values of the pixels in the smear area may be the average pixel values of all the pixels in the smear area
  • the pixel values of the pixels in the reference area may be Is the average pixel value of all pixels in the reference area.
  • the average pixel value may also be an average brightness value.
  • the smear of the display screen can also be improved according to the first parameter.
  • the smearing improvement step includes: when the value of the first parameter is greater than a preset threshold, the terminal device adjusts the display parameter of the display screen.
  • the terminal device determines that the smear test of the display screen fails.
  • the terminal device determines that the smear test of the display screen passes.
  • the terminal device adjusts the display parameter of the display screen, which specifically includes: when the display screen of the terminal device displays lighter pixels, it dims the display; when the display screen displays darker pixels, it will It is highlighted. As a result, the difference between the smear area and the periphery of the smear area is reduced, and the smear of the display screen is reduced visually.
  • smear evaluation can be performed again to evaluate the improved first parameter. If it is determined according to the first parameter that smear improvement is needed, then smear improvement is performed again. Until the display smear is within the acceptable range of the human eye, the user experience is improved.
  • the display parameter is a gamma parameter.
  • the second aspect of the present application also provides a smear improvement method, which is applied to a terminal device including a display screen.
  • the smear improvement method includes:
  • the terminal device determines a first pixel point and a second pixel point in the image to be displayed.
  • the first pixel point is a pixel point with a pixel value less than a first preset pixel value in the image to be displayed
  • the second pixel point is a pixel in the image to be displayed.
  • the first preset pixel value is less than the second preset pixel value; when an image to be displayed is displayed on the display screen, the terminal device increases the display parameter corresponding to the first pixel point and reduces A display parameter corresponding to the second pixel point.
  • the display parameter is a gamma parameter.
  • the third aspect of the present application provides a smear evaluation device for performing the smear evaluation method in any one of the possible implementation manners of the first aspect, and has the same or similar technical means and technical effects.
  • the smear evaluation device includes:
  • An image acquisition module configured to acquire a first image and a second image, where the first image is an image displayed when a smear exists on the display screen, and the second image is an image displayed before or after the smear on the display screen;
  • a smear area acquiring module configured to determine a smear area in the first image according to the first image and the second image;
  • the first parameter obtaining module is configured to determine the first parameter of the display screen according to the pixel value of the pixel point in the smear area and the pixel value of the pixel point in the reference area corresponding to the smear area in the second image. Used to evaluate the degree of smear on the display.
  • the first parameter obtaining module is specifically configured to obtain a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area; and use the difference as a First parameter.
  • the first parameter obtaining module is specifically configured to obtain a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area; and obtain a difference between the difference and the reference area.
  • the ratio of the pixel values of the pixels is used as the first parameter of the display screen.
  • the second image is an image displayed by the display screen after smearing;
  • the smearing evaluation device further includes:
  • the smear adjustment module is configured to adjust a display parameter of a display screen when a value of a first parameter is greater than a preset threshold.
  • the smear adjustment module is specifically configured to increase the display parameter corresponding to the first pixel point in the image to be displayed on the display screen and reduce the display parameter corresponding to the second pixel point in the image to be displayed on the display screen.
  • the first pixel point is a pixel point in the image to be displayed whose pixel value is less than the first preset pixel value
  • the second pixel point is a pixel point in the image to be displayed with a pixel value greater than the second preset pixel value. It is assumed that the pixel value is smaller than the second preset pixel value.
  • the display parameter is a gamma parameter.
  • the first parameter obtaining module is specifically configured to obtain the average pixel value of the smear area according to the pixel value of the pixel point in the smear area, and obtain the reference area's pixel value based on the pixel value of the pixel point in the reference area. Average pixel value; determine the first parameter of the display screen according to the average pixel value of the smear area and the average pixel value of the reference area.
  • the first parameter obtaining module is specifically configured to obtain the average brightness value of the smear area according to the brightness value of the pixels in the smear area, and obtain the reference area's brightness based on the brightness value of the pixels in the reference area. Average brightness value; determine the first parameter of the display screen according to the average brightness value of the smear area and the average brightness value of the reference area.
  • the smear evaluation device further includes: a smear evaluation result acquisition module, configured to determine that the smear test of the display screen passes when the value of the first parameter is less than or equal to a preset threshold; or When the value of the first parameter is greater than a preset threshold, it is determined that the smear test of the display screen fails.
  • a smear evaluation result acquisition module configured to determine that the smear test of the display screen passes when the value of the first parameter is less than or equal to a preset threshold; or When the value of the first parameter is greater than a preset threshold, it is determined that the smear test of the display screen fails.
  • the fourth aspect of the present application provides a smear improvement device for performing the smear improvement method in any one of the possible implementation manners of the second aspect, and has the same or similar technical means and technical effects.
  • the smear improving device includes:
  • a pixel point acquisition module is used to determine a first pixel point and a second pixel point in an image to be displayed.
  • the first pixel point is a pixel point whose pixel value is less than a first preset pixel value in the image to be displayed.
  • the second pixel point is A pixel point in the image to be displayed whose pixel value is greater than a second preset pixel value, the first preset pixel value is less than the second preset pixel value;
  • An adjustment module is configured to increase a display parameter corresponding to a first pixel point and reduce a display parameter corresponding to a second pixel point when an image to be displayed is displayed on a display screen.
  • the display parameter is a gamma parameter.
  • the fifth aspect of the present application provides an electronic device for performing the smear evaluation method in any one of the possible implementation manners of the first aspect, and has the same or similar technical means and technical effects, which are not described in this application.
  • the electronic device provided in this application includes: a processor, a memory, and a computer program; the computer program is stored in the memory, and the processor runs the computer program to perform the smear evaluation method in any one of the possible implementation manners of the first aspect.
  • the processor is specifically configured to obtain a first image and a second image, where the first image is an image displayed when a smear exists on the display screen, and the second image is a display screen before or after smearing.
  • the image displayed after the shadow; the smear area in the first image is determined according to the first image and the second image; the pixel value of the pixel point in the smear area and the pixels in the reference area corresponding to the smear area in the second image
  • the pixel value of the point determines the first parameter of the display screen, and the first parameter is used to evaluate the degree of smear of the display screen.
  • the processor is specifically configured to obtain a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area; and use the difference as a first parameter of the display screen. .
  • the processor is specifically configured to obtain the difference between the pixel value of the pixel point in the smear area and the pixel value of the pixel point in the reference area; and obtain the difference between the difference value and the pixel value in the reference area.
  • the ratio of the pixel values is used as the first parameter of the display screen.
  • the processor is specifically configured to adjust a display parameter of the display screen when the value of the first parameter is greater than a preset threshold.
  • the processor is specifically configured to increase the display parameter corresponding to the first pixel point in the image to be displayed on the display screen and reduce the display parameter corresponding to the second pixel point in the image to be displayed on the display screen;
  • the first pixel point is a pixel point in the image to be displayed whose pixel value is less than the first preset pixel value
  • the second pixel point is a pixel point in the image to be displayed whose pixel value is greater than the second preset pixel value.
  • the first preset point is The pixel value is smaller than the second preset pixel value.
  • the display parameter is a gamma parameter.
  • the processor is specifically configured to obtain the average pixel value of the smear area according to the pixel value of the pixel point in the smear area, and obtain the average pixel value of the reference area according to the pixel value of the pixel point in the reference area. ; Determine the first parameter of the display screen according to the average pixel value of the smear area and the average pixel value of the reference area.
  • the processor is specifically configured to obtain the average brightness value of the smear area according to the brightness value of the pixels in the smear area, and obtain the average brightness value of the reference area according to the brightness value of the pixels in the reference area. ; Determine the first parameter of the display screen according to the average brightness value of the smear area and the average brightness value of the reference area.
  • the processor is specifically configured to determine that the smear test of the display screen passes when the value of the first parameter is less than or equal to a preset threshold; or, when the value of the first parameter is greater than the preset value When setting the threshold, make sure that the smear test of the display fails.
  • a sixth aspect of the present application provides an electronic device for performing the smear improvement method in any one of the possible implementation manners of the second aspect, and has the same or similar technical means and technical effects, which are not described in this application.
  • the electronic device provided in this application includes: a processor, a memory, and a computer program; the computer program is stored in the memory, and the processor runs the computer program to perform the smear improvement method in any one of the possible implementation manners of the second aspect.
  • the processor is specifically configured to determine a first pixel point and a second pixel point in the image to be displayed, where the first pixel point is a pixel whose pixel value in the image to be displayed is smaller than the first preset pixel value.
  • Pixel point the second pixel point is a pixel point in the image to be displayed whose pixel value is greater than the second preset pixel value, and the first preset pixel value is less than the second preset pixel value; when the to-be-displayed image is displayed on the display screen, The display parameter corresponding to the first pixel point is increased, and the display parameter corresponding to the second pixel point is decreased.
  • the display parameter is a gamma parameter.
  • a seventh aspect of the present application provides a computer storage medium, where the storage medium includes a computer program, and the computer program is used to implement the smear evaluation method in any one of the possible implementation manners of the first aspect.
  • An eighth aspect of the present application provides a computer storage medium, where the storage medium includes a computer program, and the computer program is used to implement the smear improvement method in any one of the possible implementation manners of the second aspect.
  • a ninth aspect of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code runs on a computer, the computer causes the computer to execute any one of the foregoing possible implementations of the first aspect. Smear evaluation method.
  • a tenth aspect of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code is run on a computer, the computer is caused to execute any one of the foregoing possible implementations of the second aspect. Smear improvement method.
  • An eleventh aspect of the present application provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the chip is installed
  • the electronic device executes the smear evaluation method in any one of the possible implementation manners of the first aspect.
  • a twelfth aspect of the present application provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the chip is installed
  • the electronic device executes the smear improvement method in any one of the possible implementation manners of the second aspect.
  • FIG. 1 is a schematic diagram of a shooting scene of a smear evaluation method according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a smear problem of a display screen
  • FIG. 3 is a schematic flowchart of a smear evaluation method provided in Embodiment 1 of the present application.
  • FIG. 4 is a schematic diagram of an image captured by a high-speed camera in an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a smear evaluation method provided in Embodiment 2 of the present application.
  • FIG. 6 is a schematic diagram of a gamma curve
  • FIG. 7 is a schematic flowchart of a smear improvement method according to an embodiment of the present application.
  • FIG. 8A is a schematic view showing an effect of a display interface of an electronic device provided in Embodiment 1 of the present application;
  • FIG. 8B is a schematic view showing an effect of a display interface of an electronic device provided in Embodiment 2 of the present application.
  • FIG. 9 is a schematic structural diagram of a smear evaluation device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a smear improving device according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram of a shooting scene of a smear evaluation method according to an embodiment of the present application.
  • the left side of FIG. 1 is a shooting device, which can be a high-speed camera
  • the right side of FIG. 1 is a display device including a display screen to be evaluated, such as a television, a monitor, a notebook computer, a mobile phone, etc. It may be a curved display screen, and the display screen in the embodiment of the present application may be a conventional liquid crystal display screen or an OLED display screen.
  • the shooting frequency of high-speed cameras is much higher than the screen refresh frequency of the display screen.
  • the screen refresh rate of the display is usually 60Hz, while high-speed cameras can reach a shooting frequency of at least 2000 frames per second. Therefore, at least 1/60 of a second between the current frame and the next frame, the high-speed camera will capture at least 33 images.
  • the same shooting device is used for shooting, the display screen displays the same test image, the shooting device and the display device are fixedly set, and the shooting environment such as light and air humidity is also consistent.
  • the test image displayed on the display screen is usually a test video with object motion.
  • the content of the test video can be a black square sliding over a white background horizontally, optionally, or a white square sliding over a black background.
  • the moving object can also be text, symbols, animals, people, etc.
  • the color or brightness of the moving object is a color or brightness that can be distinguished from the background, and the moving direction of the moving object can be any direction such as horizontal, vertical, and curved.
  • the test video content can also be that the object remains stationary on the screen, and the background moves relative to the object, making the user visually think that the object is moving.
  • the smear evaluation method provided in the present application is exemplarily described by taking the content of the test video as a black square sliding horizontally in a white background as an example.
  • FIG. 2 is a schematic diagram of a smear problem of a display screen.
  • the display screen when the display screen displays a third frame image adjacent to the second frame image, the display screen will remove the smear of the first frame image, leaving only the second frame image.
  • Smear makes the length and duration of smears of different quality display screens the same, and the duration of smears depends on the image refresh rate. Therefore, the current evaluation criteria of the smear length and the duration of the smear can no longer be used to measure the smear degree of different display screens.
  • the embodiments of the present application provide at least one smear evaluation, improvement method, and electronic device.
  • the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
  • FIG. 3 is a schematic flowchart of a smear evaluation method provided in Example 1 of the present application.
  • the smear evaluation method provided by this embodiment an image displayed when a smear exists on the display screen and an image displayed before / after the smear of the display screen are determined, and then the smear area is determined, and then the smear area is determined according to the smear area and the reference area.
  • the degree of shadowing can accurately measure the degree of smearing of the OLED display.
  • the execution subject of the smear evaluation method in this embodiment is a terminal device, and the terminal device may be, for example, a high-speed camera, a display device, or other electronic devices in FIG. 1.
  • smear evaluation methods include:
  • the terminal device acquires a first image and a second image.
  • the first image is an image displayed when a smear exists on the display screen
  • the second image is an image displayed before or after the smear on the display screen.
  • the display device including the display screen to be evaluated and the high-speed camera may be respectively placed in a manner as shown in FIG. 1.
  • a test image is displayed on the display to be evaluated.
  • the test image is a black square shown in FIG. 2 sliding horizontally on a white background.
  • a high-speed camera takes a picture of the display to be evaluated and records the movement of the black square.
  • FIG. 4 is a schematic diagram of an image obtained by a high-speed camera in an embodiment of the present application.
  • the images obtained by the high-speed camera include at least Image 1, Image 2, Image 3, Image 4, Image 5, and Image 6 in the order of time.
  • image 1 is an image taken by a high-speed camera at time t1
  • image 1 is a photo of a black square before moving against a white background
  • image 1 is an image taken by a high-speed camera when the display screen displays the i-th frame image
  • i is positive Integer
  • Image 2 is an image taken by a high-speed camera at time t2.
  • Image 2 is a photo of a black square moving on a white background and producing smear on the display.
  • Image 2 is a high-speed camera when the display shows the i + 1 frame image. Captured image.
  • Image 3 is the image captured by the high-speed camera at time t3.
  • Image 3 is still the image captured by the high-speed camera when the display screen displays the i + 1 frame image.
  • image 3 is the smear in smear area 1.
  • image 4 is the image captured by the high-speed camera at time t4.
  • Image 4 is still the image captured by the high-speed camera when the display screen displays the i + 1 frame image.
  • image 4 is the smear in smear area 1.
  • image 5 is an image captured by a high-speed camera at time t5
  • image 5 is an image captured by a high-speed camera when the display screen displays the i + 2 frame image.
  • image 5 has smear area 1 disappearing and smear appearing.
  • Image 6 is an image taken by a high-speed camera at time t6
  • image 6 is a photo of a black square moving against a white background
  • image 6 is an image taken by a high-speed camera when the display screen displays the j-th frame image
  • j is greater than i + An integer of 2.
  • the first image and the second image displayed at different times on the display screen acquired by the terminal device may be images obtained by shooting the display screen at different times for a high-speed camera.
  • the first image may be an image in which smear exists in any one of image 2, image 3, image 4, and image 5 in FIG. 4.
  • the second image may be image 1 or image 6.
  • the first image is image 5
  • the second image may also be image 4.
  • the embodiment of the present application considers that the degree of smear caused by different display screens is different at the same time, which may be specifically embodied as two smears when comparing the smear areas of the display screen 1 and the display screen 2. The pixel values of the areas are different.
  • the smear quality of the two displays is the same. If the smear areas of different displays have different smear relief times, the display cannot be correctly evaluated. Degree of smear.
  • a high-speed camera may be used to shoot towards the display screen, and send all the captured images to the terminal device.
  • the terminal device selects the first image and the second image from all the received images.
  • the high-speed camera may also send only the first image and the second image to the terminal device, and the first image and the second image may be determined by the high-speed camera from all captured images, and may also be the terminal device from all captured images Selected.
  • the terminal device determines a smear area in the first image according to the first image and the second image.
  • the terminal device determines the smear area in the first image according to the first image and the second image.
  • the pixels belonging to the smear in the first image constitute a smear area. Referring to FIG. 4, the smear area may be square.
  • the way to obtain the smear region may be the difference between the values of the pixel points at the same coordinate position in the first image and the second image, and then the first changed image in the first image and the second image may be obtained.
  • Two candidate areas in the first image may be determined according to the first pixel point, and the values of the two candidate areas are different from those in the second image. It can be understood that these two candidate areas, one is the smear area, and the other is the area after the moving object moves.
  • the moving direction of the moving object in the image can be obtained.
  • the first image can be determined in the two candidate regions.
  • the area of the moving object in the first image may also be determined according to the first image and the second image.
  • the candidate area of the two candidate areas located in the area of the moving object in the first image is smear. region.
  • the smear area may also be calculated according to the initial position of the moving object in the test video, the size of the moving object, the moving rate and direction of the moving object, and the frame rate of the test video.
  • the terminal device determines a first parameter of the display screen according to the pixel value of the pixel point in the smear area and the pixel value of the pixel point in the reference area corresponding to the smear area in the second image.
  • the first parameter is used to evaluate the display screen. Degree of smear.
  • the reference area in the second image is an area having the same coordinate information as the smear area in the first image.
  • the pixel values of the pixel points in the smear area can be directly compared.
  • the moving object is a black square
  • the pixel values of the pixels in the smear area with a heavy smear degree are closer to the pixel values of the pixels in the moving object, and the pixel values of the pixels in the smear area with a lighter smear degree are related to the background in the test image. The closer the pixel value of the pixel point is.
  • a first parameter may be determined according to the pixel values of the pixels in the smear area and the reference area, and the first parameter indicates the smear degree of the display screen.
  • the reference area is an area in the second image that has the same position as the smear area.
  • the second image when the second image is an image captured by a high-speed camera before smearing, for example, the second image uses image 1 in FIG. 4, and the pixels in the reference area are pixels of a moving object.
  • the first parameter can be obtained according to the pixel values of the pixels in the smear area and the reference area.
  • the first parameter is a parameter that can indicate the closeness of the pixel values of the pixels in the smear area and the reference area. The closer the parameter indication is, the higher the smear degree of the display screen is, and the display quality is poor.
  • the second image is an image captured by a high-speed camera after smearing
  • the image 6 in FIG. 4 is used as the second image
  • the pixels in the reference area are the pixels of the background pattern after the moving object moves.
  • the first parameter can be obtained according to the pixel values of the pixels in the smear area and the reference area.
  • the first parameter is a parameter that can indicate the closeness of the pixel values of the pixels in the smear area and the reference area. The closer the parameter indication is, the lower the smear degree of the display screen is and the higher the display quality is.
  • the first image and the second image may be in an RGB format or a YUV format.
  • the image format is an RGB format
  • the pixel value of the pixel point may be three component values of R, G, and B of the pixel point.
  • one way to obtain the first parameter is:
  • the terminal device acquires a difference between a pixel value of a pixel in the smear area and a pixel value of a pixel in the reference area, and uses the difference as a first parameter of the display screen.
  • the pixel values of each pixel point in the smear area in the first image are respectively different from the pixel values of the pixel points at the same position in the reference area in the second image, and the obtained difference is called the first A parameter.
  • the first parameter can be used to indicate the closeness of the smear area to the reference area, and thus can be used to indicate the smear degree of the display screen.
  • the terminal device obtains a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area.
  • the terminal device obtains a ratio between the difference and the pixel value of the pixel in the reference area, and uses the ratio as the first parameter of the display screen.
  • the pixel values of the pixels in the image may be affected by the sensor exposure value of the high-speed camera, and then affect the accuracy of the first parameter. Therefore, in this embodiment, the ratio of the difference to the pixel value of the pixels in the reference area is further obtained, and the ratio is used as the first parameter of the display screen, thereby avoiding the interference of the sensor exposure value of the high-speed camera on the first parameter, and improving the The accuracy of a parameter.
  • a difference between an average pixel value of all pixels in the smear area and an average pixel value of all pixels in the reference area may be selected.
  • the difference between the average pixel value of several pixels selected in the smear area and the average pixel value of several pixels at corresponding positions in the reference area may also be selected.
  • the difference between the pixel value of any pixel in the smear area and the pixel value of the pixel at the corresponding position in the reference area can also be selected.
  • the brightness value of the pixel may be used instead of the pixel value of the pixel to simplify the process of obtaining the first parameter.
  • the terminal device obtains the average brightness value of the smear area based on the brightness values of the pixels in the smear area, obtains the average brightness value of the reference area based on the brightness values of the pixels in the reference area, and then obtains the average brightness of the smear area. Value and the average brightness value of the reference area to determine the first parameter of the display screen.
  • a variation curve of the degree of smearing of the display screen with time can also be obtained to achieve a more comprehensive evaluation of the degree of smearing of the display screen.
  • the faster the display whose attenuation degree decreases with time the better the quality.
  • different test images can also be used to obtain the degree of smear of the display screen when displaying images of different brightness / color.
  • the smear evaluation method provided by the embodiment of the present application includes: obtaining, by a terminal device, a first image and a second image, determining a smear area in the first image based on the first image and the second image, and determining pixels in the smear area according to pixels in the smear area. And the pixel value of the pixel point in the reference area corresponding to the smear area in the second image, determine the first parameter of the display screen, and the first parameter is used to determine the smear degree of the display screen.
  • a high-speed camera captures a display screen displaying a moving object, and obtains a first image with smear and a second image without smear.
  • the corresponding reference area can determine the degree of smearing on the display screen.
  • the method of evaluating smearing in this embodiment can be applied to any display screen, which solves the problem of evaluating the degree of smearing on the display screen by using the smear length and duration Does not apply to OLED display problems.
  • FIG. 5 is a schematic flowchart of a smear evaluation method provided in Embodiment 2 of the present application.
  • smear evaluation methods include:
  • the terminal device acquires a first image and a second image.
  • the first image is an image obtained by shooting a display screen with a high-speed camera when there is smear on the display screen
  • the second image is an image obtained by shooting the display screen with a high-speed camera after smearing.
  • the terminal device determines a smear area in the first image according to the first image and the second image.
  • the terminal device determines a first parameter of the display screen according to the pixel value of the pixel point in the smear area and the pixel value of the pixel point in the reference area corresponding to the smear area in the second image.
  • the first parameter is used to determine the display screen. Degree of smear.
  • S201 to S203 in this embodiment are similar to S101 to S103 in the embodiment shown in FIG. 3, and details are not described herein again.
  • the terminal device determines whether the value of the first parameter is greater than a preset threshold; if yes, executes S205.
  • the terminal device adjusts the display parameters of the display screen.
  • the second image is an image obtained by a high-speed camera after smearing.
  • the first parameter can be compared with a preset threshold.
  • the preset threshold When the first parameter is greater than the preset threshold, the smear in the smear area is considered to be significantly different from the background in the reference area. , The degree of smear of the display screen is heavy, and the display screen quality is poor.
  • the display parameters of the display screen can be adjusted so that the smear displayed on the display screen is closer to the background in the reference area, thereby reducing the smear of the display screen and improving the user's visual experience.
  • the adjustment of the display parameters of the display screen by the terminal device may specifically be:
  • the terminal device increases the display parameter corresponding to the first pixel point in the image to be displayed on the display screen and reduces the display parameter corresponding to the second pixel point in the image to be displayed on the display screen.
  • the first pixel point is a pixel point in the image to be displayed whose pixel value is less than the first preset pixel value
  • the second pixel point is a pixel point in the image to be displayed whose pixel value is greater than the second preset pixel value.
  • the first preset point is The pixel value is smaller than the second preset pixel value.
  • the display screen displays an image
  • the background of the smear area and the surrounding area of the smear area in the image displayed by the display screen can be more improved.
  • the degree of smear of the display screen is reduced visually.
  • the display parameter of the display screen is a gamma parameter.
  • the brightness of the corresponding pixel point in the display screen is determined according to the brightness of the pixel points in the image.
  • the photoelectric conversion of the display screen is non-linear. That is, when the darker pixels and brighter pixels in the image increase the same brightness, the human eye can more sensitively notice that the brightness of the darker pixels is increased. Therefore, the brighter pixels are on the screen.
  • a large brightness difference is required between each pixel during display.
  • FIG. 6 is a schematic diagram of a gamma curve.
  • S201 to S204 can be executed again to determine whether the degree of smear of the adjusted display screen meets a preset threshold. If it is not satisfied, S205 can be performed again until the display The degree of smear of the screen meets a preset threshold.
  • the smear evaluation method further includes:
  • the terminal device determines that the smear test of the display screen passes.
  • the smear evaluation method further includes:
  • the terminal device determines that the smear test of the display screen fails.
  • the terminal device may remind the user on the display screen in the form of text information that the current display smear test fails, and the display screen quality is low.
  • S2051 may be executed simultaneously with S205, or executed after S205.
  • the second image is an image obtained by the display screen before the smear is taken by the high-speed camera
  • the first parameter is less than a preset threshold
  • the smear test of the display screen is considered to have failed. Adjust the display parameters of the display.
  • the specific adjustment method is the same as this embodiment, which is not described in this application.
  • the smear evaluation method provided in the embodiment of the present application adjusts the display parameters of the display screen when it is determined that the smear degree of the display screen is heavy according to the first parameter, thereby reducing the smear of the display screen and improving the user's visual experience.
  • FIG. 7 is a schematic flowchart of a smear improvement method according to an embodiment of the present application.
  • the execution subject of this embodiment may be a terminal device including a display screen.
  • the smear improvement method includes:
  • the terminal device determines a first pixel point and a second pixel point in the image to be displayed.
  • the first pixel point is a pixel point in the image to be displayed whose pixel value is less than the first preset pixel value
  • the second pixel point is a pixel point in the image to be displayed whose pixel value is greater than the second preset pixel value.
  • the first preset point is The pixel value is smaller than the second preset pixel value
  • the terminal device increases the display parameter corresponding to the first pixel point and decreases the display parameter corresponding to the second pixel point.
  • the display screen displays an image
  • the background of the smear area and the surrounding area of the smear area in the image displayed by the display screen can be more improved.
  • the degree of smear of the display screen is reduced visually.
  • the display parameter of the display screen is a gamma parameter.
  • a terminal device including a display screen to watch a video or image that requires high image contrast, such as a movie, a TV series, or a short video in a social application
  • the user also
  • the above smear adjustment function can be turned off.
  • the smear adjustment function is enabled by default on the terminal device.
  • the terminal device turns on the smear adjustment function to adjust the display parameters of the display screen.
  • the smear adjustment function can be turned off, and information such as details in the video can be retained to avoid reducing the user's movie viewing experience.
  • FIG. 8A is a schematic view showing an effect of a display interface of an electronic device provided in Embodiment 1 of the present application.
  • a dialog box pops up on the display screen, and the dialog box includes a message asking whether the user You need to turn off the reminder for smear improvement.
  • a dialog box asking the user about the extent of the smear improvement may be further popped up.
  • the operation frame is provided with a plurality of identifications of the degree of smear improvement such as "high”, “medium”, and "low”.
  • a slider can also be set in the dialog box to facilitate the user to select the appropriate degree of smear improvement.
  • FIG. 8B is a schematic view showing the effect of the display interface of the electronic device provided in Embodiment 2 of the present application.
  • the display interface of the terminal device may be provided with an application option for improving smear, and the user may click the Option to enable smear improvement application.
  • the smear improvement application users can enable or disable the smear improvement function to set the smear improvement level.
  • the operation interface of the smear improvement application also provides operation options such as brightness adjustment, chroma adjustment, contrast adjustment, eye protection mode and other functions, which is convenient for the user to adjust the display effect of the display screen.
  • the present application also provides a smear evaluation device for performing the smear evaluation method in any one of the embodiments shown in FIG. 3 to FIG. 5, which have the same or similar technical features and technical effects.
  • FIG. 9 is a schematic structural diagram of a smear evaluation device according to an embodiment of the present application. As shown in FIG. 9, the smear evaluation device includes:
  • An image acquisition module 401 configured to acquire a first image and a second image, where the first image is an image displayed when a smear exists on the display screen, and the second image is an image displayed before or after the smear on the display screen;
  • the smear area acquiring module 402 is configured to determine the smear area in the first image according to the first image and the second image;
  • the first parameter obtaining module 403 is configured to determine a first parameter of the display screen according to a pixel value of a pixel in the smear area and a pixel value of a pixel in a reference area corresponding to the smear area in the second image. Used to evaluate the degree of smear on the display.
  • the first parameter obtaining module 403 is specifically configured to obtain a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area; and use the difference as a first parameter of the display screen.
  • the first parameter obtaining module 403 is specifically configured to obtain a difference between a pixel value of a pixel in a smear area and a pixel value of a pixel in a reference area; obtain a difference and a pixel of a pixel in the reference area The ratio of the values is used as the first parameter of the display.
  • the smearing evaluation device when the second image is an image displayed on the display screen after smearing, the smearing evaluation device further includes:
  • the smear adjustment module 404 is configured to adjust a display parameter of a display screen when a value of a first parameter is greater than a preset threshold.
  • the smear adjustment module 404 is specifically configured to increase the display parameter corresponding to the first pixel point in the image to be displayed on the display screen and reduce the display parameter corresponding to the second pixel point in the image to be displayed on the display screen;
  • One pixel point is a pixel point in the image to be displayed whose pixel value is less than the first preset pixel value
  • the second pixel point is a pixel point in the image to be displayed with a pixel value greater than the second preset pixel value
  • the first preset pixel value is less than The second preset pixel value.
  • the display parameter is a gamma parameter.
  • the first parameter obtaining module 403 is specifically configured to obtain the average pixel value of the smear area according to the pixel value of the pixel point in the smear area, and obtain the average pixel value of the reference area according to the pixel value of the pixel point in the reference area;
  • the first parameter of the display screen is determined according to the average pixel value of the smear area and the average pixel value of the reference area.
  • the first parameter obtaining module 403 is specifically configured to obtain the average brightness value of the smear area according to the brightness value of the pixels in the smear area, and obtain the average brightness value of the reference area according to the brightness value of the pixels in the reference area;
  • the first parameter of the display screen is determined according to the average brightness value of the smear area and the average brightness value of the reference area.
  • the smear evaluation device further includes: a smear evaluation result acquisition module 405, configured to determine that the smear test of the display screen passes when the value of the first parameter is less than or equal to a preset threshold. Or when the value of the first parameter is greater than a preset threshold, it is determined that the smear test of the display screen fails.
  • a smear evaluation result acquisition module 405 configured to determine that the smear test of the display screen passes when the value of the first parameter is less than or equal to a preset threshold. Or when the value of the first parameter is greater than a preset threshold, it is determined that the smear test of the display screen fails.
  • the present application also provides a smearing improvement device for performing the smearing improvement method in the embodiment shown in FIG. 7, which has the same or similar technical features and technical effects.
  • FIG. 10 is a schematic structural diagram of a smear improvement device according to an embodiment of the present application. As shown in FIG. 10, the smear improving device includes:
  • a pixel point acquisition module 501 is configured to determine a first pixel point and a second pixel point in an image to be displayed, where the first pixel point is a pixel point whose pixel value in the image to be displayed is less than a first preset pixel value, and the second pixel point A pixel point in the image to be displayed whose pixel value is greater than a second preset pixel value, the first preset pixel value is less than the second preset pixel value;
  • the adjusting module 502 is configured to increase a display parameter corresponding to a first pixel point and reduce a display parameter corresponding to a second pixel point when an image to be displayed is displayed on a display screen.
  • the display parameter is a gamma parameter.
  • the present application further provides an electronic device for performing the smear evaluation method in any one of the embodiments shown in FIG. 3 to FIG. 5, which have the same or similar technical features and technical effects.
  • FIG. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • the electronic device may include a processor 601, a memory 602, and a bus system 603.
  • the processor 601 and the memory 602 are connected through a bus system 603.
  • the memory 602 is used to store instructions, and the processor 601 is used to execute the instructions stored in the memory 602.
  • the memory 602 of the electronic device stores the program code, and the processor 601 can call the program code stored in the memory 602 to perform various smear evaluation methods described in this application. To avoid repetition, it will not be described in detail here.
  • the processor 601 may be a Central Processing Unit (“CPU”), and the processor 601 may also be another general-purpose processor, digital signal processor (DSP), or special-purpose integration. Circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory 602 may include a read only memory (ROM) device or a random access memory (RAM) device. Any other suitable type of storage device may also be used as the memory 602.
  • the memory 602 may include code and data 6021 that are accessed by the processor 601 using the bus system 603.
  • the memory 602 may further include an operating system 6022 and an application program 6023, which includes at least one program that allows the processor 601 to perform the smear evaluation and improvement method described in this application.
  • the application 6023 may include applications 1 to N, which further includes a smear evaluation and improvement application that performs the smear evaluation and improvement method described in this application. Among them, N is a positive integer.
  • the bus system 603 may include a data bus, a power bus, a control bus, a status signal bus, and the like. However, for the sake of clarity, various buses are marked as the bus system 603 in the figure.
  • the electronic device may further include one or more output devices, such as, for example, a display screen 604.
  • the smear evaluation and improvement method of the present application may be used to evaluate and improve the smear of the display screen 604.
  • the display screen 604 may be connected to the processor 601 via a bus system 603.
  • the display screen 604 may be a display screen for displaying a captured image.
  • the electronic device is only used to perform a partial smear evaluation method.
  • the present application also provides a computer storage medium.
  • the storage medium includes a computer program, and the computer program is configured to implement the smear evaluation method in any one of the embodiments shown in FIG. 3 to FIG. 5.
  • the present application further provides a computer storage medium.
  • the storage medium includes a computer program, and the computer program is used to implement the smear improvement method in the embodiment shown in FIG. 7.
  • the present application also provides a computer program product.
  • the computer program product includes computer program code, and when the computer program code runs on a computer, the computer causes the computer to execute any one of the embodiments shown in FIG. 3 to FIG. 5. Smear evaluation method.
  • the present application also provides a computer program product.
  • the computer program product includes computer program code, and when the computer program code is run on a computer, the computer is caused to execute the smear improvement method in the embodiment shown in FIG. 7.
  • the present application also provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the electronic device on which the chip is installed.
  • a chip including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the electronic device on which the chip is installed.
  • the present application also provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the electronic device on which the chip is installed
  • a chip including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the electronic device on which the chip is installed
  • the smear improvement method in the embodiment shown in FIG. 7 described above is executed.
  • At least one means one or more, and “multiple” means two or more.
  • “And / or” describes the association relationship between related objects, and indicates that there can be three kinds of relationships. For example, A and / or B can indicate: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character “/” generally indicates that the related objects are an "or” relationship. "At least one or more of the following” or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one (a), a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the processors involved in the embodiments of the present application may be general-purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and may implement or The disclosed methods, steps and logic block diagrams in the embodiments of the present application are executed.
  • a general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the memory involved in the embodiments of the present application may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory (volatile memory), such as Random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units 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 may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware, or in the form of hardware plus software functional units.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk)).
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a DVD
  • a semiconductor medium for example, a solid state disk (Solid State Disk)

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Abstract

本申请提供一种拖影评价、改善方法和电子设备，该拖影评价方法包括：终端设备获取第一图像和第二图像，第一图像为显示屏存在拖影时显示的图像，第二图像为显示屏在拖影前或拖影后显示的图像；终端设备根据第一图像和第二图像，确定第一图像中的拖影区域；终端设备根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于评价显示屏的拖影程度。本实施例中的拖影评价方法可适用于任意显示屏，解决了目前采用拖影长度和拖影持续时长评价显示屏拖影程度时不适用于OLED显示屏的问题。

Description

拖影评价、改善方法和电子设备 技术领域
本申请涉及显示技术领域，尤其涉及一种拖影评价、改善方法和电子设备。
背景技术
显示屏可直观形象的向用户显示各类信息，因此得到了广泛应用。显示屏充斥在日常生活的方方面面，如手机、平板电脑、电视、电梯广告电视等。当显示屏显示的图像中存在运动物体时，运动物体在显示屏上可能产生拖影，拖影会严重影响用户的观看感受。如何准确判断拖影程度成为判断显示屏质量的重要依据。
目前，判断显示屏拖影程度的方式主要是采用高速相机拍摄显示移动物体的显示屏，根据显示屏上的拖影长度和拖影持续时长来衡量不同显示屏的拖影程度。拖影长度越短、拖影持续时长越短，则显示屏质量越好。
但是，随着显示屏技术的发展，有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏因为发光器件特性，使得不同质量的显示屏的拖影长度和拖影持续时长一致，目前的拖影评价方法不适用于OLED显示屏。
发明内容
本申请提供一种拖影评价、改善方法和电子设备，可对OLED显示屏的拖影程度进行准确评价。
本申请第一方面，提供一种拖影评价方法，包括：终端设备获取显示屏拖影时的第一图像和显示屏拖影前/后的第二图像，然后根据第一图像和第二图像，在第一图像中确定出拖影区域，在第二图像中确定出与拖影区域具有相同位置的参照区域，可以理解的是参照区域中没有拖影。终端设备根据拖影区域和参照区域，即可评价显示屏的拖影程度。
示例性的，根据获取的有拖影的第一图像和无拖影的第二图像，根据拖影区域在第一图像中的拖影以及在第二图像中的对应的参照区域，可确定出显示屏的拖影程度，本实施例中的拖影评价方法可适用于任意显示屏，解决了目前采用拖影长度和拖影持续时长评价显示屏拖影程度时不适用于OLED显示屏的问题。
进一步可选的，在一种可能的获取第一参数的方法中，终端设备获取指示显示屏的拖影程度的第一参数的过程具体可以包括：终端设备获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；将差值作为显示屏的第一参数。
可以理解的是，当第二显示屏为拖影前图像，则差值越大，显示屏拖影程度越轻，显示屏质量越高。当第二显示屏为拖影后图像，则差值越小，显示屏拖影程度越轻，显示屏质量越高。
进一步可选的，在一种可能的获取第一参数的方法中，终端设备获取差值与参照区域 中像素点的像素值的比值，将比值作为显示屏的第一参数。
示例性的，第一图像中属于拖影的像素点构成拖影区域，第二图像中的参照区域为与第一图像中的拖影区域具有相同坐标信息的区域。
通过将比值作为显示屏的第一参数，进而避免了高速相机的传感器曝光值对第一参数的干扰，提高了第一参数的准确度。
可选的，在将差值或者比值作为第一参数时，其中的拖影区域的像素点的像素值可以是拖影区域中所有像素点的平均像素值，参照区域的像素点的像素值可以是参照区域中所有像素点的平均像素值。可选的，平均像素值还可以是平均亮度值。
进一步的，在获取到第一参数后，还可根据第一参数对显示屏的拖影进行改善。其中，当第二图像为显示屏在拖影后显示的图像时，拖影改善步骤包括：在第一参数的取值大于预设阈值时，终端设备对显示屏的显示参数进行调整。
可以理解的是，当第一参数的取值大于预设阈值时，终端设备确定显示屏的拖影测试不通过。对应的，当第一参数的取值小于或等于预设阈值时，终端设备确定显示屏的拖影测试通过。
示例性的，终端设备对显示屏的显示参数进行调整，具体包括：终端设备的显示屏在显示较亮的像素点时，将其调暗显示；显示屏在显示较暗的像素点时，将其调亮显示。从而减弱了拖影区域与拖影区域周边的差异，从视觉效果上减弱了显示屏拖影。
示例性的，在对显示屏进行拖影改善后，还可再次进行拖影评价，评价改善后的第一参数，若根据第一参数确定还需进行拖影改善，则再次进行拖影改善，直至显示屏拖影在人眼可接受范围内，提高了用户使用感受。
示例性的，显示参数为gamma参数。
本申请第二方面还提供一种拖影改善方法，应用于包含显示屏的终端设备，拖影改善方法包括：
终端设备确定待显示图像中的第一像素点和第二像素点，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值；当在显示屏上显示待显示图像时，终端设备提高第一像素点对应的显示参数，降低第二像素点对应的显示参数。
在一种可行的实现方式中，显示参数为gamma参数。
本申请第三方面提供一种拖影评价装置，用于执行上述第一方面任一种可能的实现方式中的拖影评价方法，具有相同或相似的技术手段和技术效果。
在一种可行的实现方式中，拖影评价装置被包括：
图像获取模块，用于获取第一图像和第二图像，第一图像为显示屏存在拖影时显示的图像，第二图像为显示屏在拖影前或拖影后显示的图像；
拖影区域获取模块，用于根据第一图像和第二图像，确定第一图像中的拖影区域；
第一参数获取模块，用于根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于评价显示屏的拖影程度。
在一种可行的实现方式中，第一参数获取模块具体用于，获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；将差值作为显示屏的第一参数。
在一种可行的实现方式中，第一参数获取模块具体用于，获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；获取差值与参照区域中像素点的像素值的比值，将比值作为显示屏的第一参数。
在一种可行的实现方式中，第二图像为显示屏在拖影后显示的图像；拖影评价装置还包括：
拖影调整模块，用于在第一参数的取值大于预设阈值时，对显示屏的显示参数进行调整。
在一种可行的实现方式中，拖影调整模块具体用于，提高显示屏的待显示图像中第一像素点对应的显示参数，降低显示屏的待显示图像中第二像素点对应的显示参数；其中，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值。
在一种可行的实现方式中，显示参数为gamma参数。
在一种可行的实现方式中，第一参数获取模块具体用于，根据拖影区域中像素点的像素值获取拖影区域的平均像素值，根据参照区域中像素点的像素值获取参照区域的平均像素值；根据拖影区域的平均像素值以及参照区域的平均像素值，确定显示屏的第一参数。
在一种可行的实现方式中，第一参数获取模块具体用于，根据拖影区域中像素点的亮度值获取拖影区域的平均亮度值，根据参照区域中像素点的亮度值获取参照区域的平均亮度值；根据拖影区域的平均亮度值以及参照区域的平均亮度值，确定显示屏的第一参数。
在一种可行的实现方式中，拖影评价装置还包括：拖影评价结果获取模块，用于当第一参数的取值小于或等于预设阈值时，确定显示屏的拖影测试通过；或者，当第一参数的取值大于预设阈值时，确定显示屏的拖影测试不通过。
本申请第四方面提供一种拖影改善装置，用于执行上述第二方面任一种可能的实现方式中的拖影改善方法，具有相同或相似的技术手段和技术效果。
在一种可行的实现方式中，拖影改善装置包括：
像素点获取模块，用于确定待显示图像中的第一像素点和第二像素点，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值；
调整模块，用于当在显示屏上显示待显示图像时，提高第一像素点对应的显示参数，降低第二像素点对应的显示参数。
在一种可行的实现方式中，显示参数为gamma参数。
本申请第五方面提供一种电子设备，用于执行上述第一方面任一种可能的实现方式中的拖影评价方法，具有相同或相似的技术手段和技术效果，本申请不再赘述。
本申请提供的电子设备包括：处理器、存储器和计算机程序；计算机程序存储在存储器中，处理器运行计算机程序执行上述第一方面任一种可能的实现方式中的拖影评价方法。
在一种可行的实现方式中，处理器具体用于，获取第一图像和第二图像，第一图像为显示屏存在拖影时显示的图像，第二图像为显示屏在拖影前或拖影后显示的图像；根据第一图像和第二图像，确定第一图像中的拖影区域；根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于评价显示屏的拖影程度。
在一种可行的实现方式中，处理器具体用于，获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；将差值作为显示屏的第一参数。
在一种可行的实现方式中，处理器具体用于，获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；获取差值与参照区域中像素点的像素值的比值，将比值作为显示屏的第一参数。
在一种可行的实现方式中，处理器具体用于，在第一参数的取值大于预设阈值时，对显示屏的显示参数进行调整。
在一种可行的实现方式中，处理器具体用于，提高显示屏的待显示图像中第一像素点对应的显示参数，降低显示屏的待显示图像中第二像素点对应的显示参数；
其中，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值。
在一种可行的实现方式中，显示参数为gamma参数。
在一种可行的实现方式中，处理器具体用于，根据拖影区域中像素点的像素值获取拖影区域的平均像素值，根据参照区域中像素点的像素值获取参照区域的平均像素值；根据拖影区域的平均像素值以及参照区域的平均像素值，确定显示屏的第一参数。
在一种可行的实现方式中，处理器具体用于，根据拖影区域中像素点的亮度值获取拖影区域的平均亮度值，根据参照区域中像素点的亮度值获取参照区域的平均亮度值；根据拖影区域的平均亮度值以及参照区域的平均亮度值，确定显示屏的第一参数。
在一种可行的实现方式中，处理器具体用于，当第一参数的取值小于或等于预设阈值时，确定显示屏的拖影测试通过；或者，当第一参数的取值大于预设阈值时，确定显示屏的拖影测试不通过。
本申请第六方面提供一种电子设备，用于执行上述第二方面任一种可能的实现方式中的拖影改善方法，具有相同或相似的技术手段和技术效果，本申请不再赘述。
本申请提供的电子设备包括：处理器、存储器和计算机程序；计算机程序存储在存储器中，处理器运行计算机程序执行上述第二方面任一种可能的实现方式中的拖影改善方法。
在一种可行的实现方式中，处理器具体用于，确定待显示图像中的第一像素点和第二像素点，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值；当在显示屏上显示待显示图像时，提高第一像素点对应的显示参数，降低第二像素点对应的显示参数。
在一种可行的实现方式中，显示参数为gamma参数。
本申请第七方面提供一种计算机存储介质，存储介质包括计算机程序，计算机程序用于实现上述第一方面任一种可能的实现方式中的拖影评价方法。
本申请第八方面提供一种计算机存储介质，存储介质包括计算机程序，计算机程序用于实现上述第二方面任一种可能的实现方式中的拖影改善方法。
本申请第九方面提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面任一种可能的实现方式中的拖影评价方法。
本申请第十方面提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第二方面任一种可能的实现方式中的拖影改善方法。
本申请第十一方面提供一种芯片，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的电子设备执行上述第一方面任一种可能的实现方式中的拖影评价方法。
本申请第十二方面提供一种芯片，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的电子设备执行上述第二方面任一种可能的实现方式中的拖影改善方法。
本申请的在上述各方面提供的实现的基础上，还可以进行进一步组合以提供更多实现。
附图说明
图1为本申请实施例提供的拖影评价方法的拍摄场景示意图；
图2为显示屏的拖影问题的示意图；
图3为本申请实施例一提供的拖影评价方法的流程示意图；
图4为本申请实施例中高速相机拍摄得到的图像示意图；
图5为本申请实施例二提供的拖影评价方法的流程示意图；
图6为伽玛曲线的示意图；
图7为本申请实施例提供的拖影改善方法的流程示意图；
图8A为本申请实施例一提供的电子设备的显示界面的效果示意图；
图8B为本申请实施例二提供的电子设备的显示界面的效果示意图；
图9为本申请实施例提供的拖影评价装置的结构示意图；
图10为本申请实施例提供的拖影改善装置的结构示意图；
图11为本申请实施例提供的电子设备的结构示意图。
具体实施方式
图1为本申请实施例提供的拖影评价方法的拍摄场景示意图。如图1所示，图1左侧为拍摄装置，拍摄装置可以为高速相机，图1右侧为包含待评价显示屏的显示设备，如电视、显示器、笔记本电脑、手机等，其中显示屏还可为曲面显示屏，本申请实施例中的显示屏可以为传统的液晶显示屏或者OLED显示屏。
其中，高速相机的拍摄频率远大于显示屏的屏幕刷新频率。例如，显示屏的屏幕刷新频率通常为60Hz，而高速相机至少可达到每秒2000张的拍照频率。因此，在显示屏显示当前帧与下一帧图像的1/60秒之间，高速相机至少将会拍摄33张图像。
在评价不同显示屏的拖影程度时，采用同一拍摄装置拍摄，显示屏显示相同的测试图像，且拍摄装置与显示设备固定设置，且光线、空气湿度等拍摄环境也保持一致。
显示屏中显示的测试图像通常为有物体运动的测试视频，例如，测试视频的内容可以为黑色方块在白色背景中水平滑过，可选的，也可以为白色方块在黑色背景中滑过。可选的，运动物体还可以为文字、符号、动物、人物等，运动物体的颜色或亮度为可以与背景 区分的颜色或亮度，运动物体的运动方向可以为水平、竖直、弯曲等任意方向。测试视频内容也可以为物体在屏幕上保持不动，而背景相对物体进行运动，使得用户视觉上认为物体在运动。本申请以下各实施例以测试视频的内容为黑色方块在白色背景中水平滑过为例对本申请提供的拖影评价方法进行示例性的说明。
示例性的，当显示屏显示的视频中存在运动物体时，显示屏当前时刻显示的第一帧图像与下一时刻要显示的第二帧图像不同，运动物体在两帧图像中发生了位置移动。显示屏根据第二帧图像的内容对显示屏进行刷新，使得显示屏采用第二帧图像替换当前第一帧图像。但是，显示屏在显示第二帧图像时，显示屏上可能还存在第一帧图像的残留，使得显示屏上显示出了运动物体的残影，即拖影。图2为显示屏的拖影问题的示意图。
示例性的，对于如OLED显示屏，当显示屏在显示第二帧图像之后相邻的第三帧图像时，显示屏会将第一帧图像的拖影消除，只留第二帧图像导致的拖影，使得不同质量的显示屏的拖影的长度和拖影持续时长均相同，且拖影持续时长取决于图像刷新速率。因而，目前的拖影长度和拖影持续时长的评价标准已经无法用来衡量不同显示屏的拖影程度。
为解决上述问题，本申请实施例至少提供一种拖影评价、改善方法和电子设备。下面结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
本申请实施例一方面提供一种拖影评价方法，图3为本申请实施例一提供的拖影评价方法的流程示意图。本实施例提供的拖影评价方法中，获取显示屏存在拖影时显示的图像以及显示屏拖影前/后显示的图像，确定拖影区域，然后根据拖影区域与参照区域，来确定拖影程度，可对OLED显示屏的拖影程度进行准确测量。本实施例中的拖影评价方法的执行主体为终端设备，终端设备示例性的可以为图1中的高速相机、显示设备或者其他电子设备。如图3所示，拖影评价方法包括：
S101、终端设备获取第一图像和第二图像。
其中，第一图像为显示屏存在拖影时显示的图像，第二图像为显示屏在拖影前或拖影后显示的图像。
示例性的，当用户要对待评价显示屏的拖影程度进行评价时，可将包含待评价显示屏的显示设备分别与高速相机按照如图1所示的方式进行放置。待评价显示屏播放测试图像，测试图像为如图2中所示的黑色方块在白色背景中水平滑动，高速相机拍摄待评价显示屏，记录黑色方块的运动。图4为本申请实施例中高速相机拍摄得到的图像示意图。如图4所示，高速相机拍摄得到的图像按时间现有顺序至少包括图像1、图像2、图像3、图像4、图像5和图像6。
其中，图像1为高速相机在t1时刻拍摄得到的图像，图像1为黑色方块在白色背景中运动前的照片，图像1为显示屏显示第i帧图像时高速相机拍摄得到的图像，i为正整数。图像2为高速相机在t2时刻拍摄得到的图像，图像2为黑色方块在白色背景中运动并在显示屏上产生拖影时的照片，图像2为显示屏显示第i+1帧图像时高速相机拍摄得到的图像。图像3为高速相机在t3时刻拍摄得到的图像，图像3仍为显示屏显示第i+1帧图像时高速相机拍摄得到的图像，图像3与图像2相比，拖影区域1内的拖影程度减弱。图像4为高速相机在t4时刻拍摄得到的图像，图像4仍为显示屏显示第i+1帧图像时高速相机拍摄得到的图像，图像4与图像3相比，拖影区域1内的拖影程度进一步减弱。图像5为高速相机在t5时刻拍摄得到的图像，图像5为显示屏显示第i+2帧图像时高速相机拍摄得到的图 像，图像5与图像4相比，拖影区域1消失，出现拖影区域2。图像6为高速相机在t6时刻拍摄得到的图像，图像6为黑色方块在白色背景中运动后的照片，图像6为显示屏显示第j帧图像时高速相机拍摄得到的图像，j为大于i+2的整数。
本实施例中，终端设备获取的显示屏在不同时刻显示的第一图像和第二图像，可以为高速相机在不同时刻拍摄显示屏得到图像。其中，第一图像可以为图4中的图像2、图像3、图像4和图像5中的任一个存在拖影的图像。第二图像可以为图像1或者图像6。当第一图像为图像5时，第二图像还可以为图像4。
可以理解的是，采用本实施例提供的拖影评价方法评价不同的显示屏，如图2中的显示屏1和显示屏2时，各显示屏选用的第一图像和第二图像的拍摄时刻应具有相同的时间差，即第一图像中的拖影应具有相同的拖影释缓时间。如图2所示，本申请实施例考虑到在相同时刻，由于显示屏不同导致的拖影程度不同，具体可体现为将显示屏1和显示屏2的拖影区域进行比较时，两拖影区域的像素值不同，若两拖影区域的像素值相同，则两个显示屏的拖影质量相同，若不同显示屏的拖影区域具有不同的拖影释缓时间，则无法正确评价显示屏的拖影程度。
示例性的，可以为高速相机朝向显示屏进行拍摄，并将拍摄后的所有图像发送至终端设备，终端设备从接收到的所有图像中，选择出该第一图像和第二图像。可选的，还可以为高速相机只将第一图像和第二图像发送至终端设备，第一图像和第二图像可以为高速相机从所有拍摄图像中确定，还可以为终端设备从所有拍摄图像中选定。
S102、终端设备根据第一图像和第二图像，确定第一图像中的拖影区域。
示例性的，当终端设备获取了第一图像和第二图像时，终端设备根据第一图像和第二图像，确定第一图像中的拖影区域。示例性的，第一图像中属于拖影的像素点构成拖影区域，参照图4，拖影区域可以为方形。
示例性的，获取拖影区域的方式可以为将第一图像和第二图像中相同坐标位置处的像素点的取值做差，即可得到第一图像和第二图像中发生变化的第一像素点，根据第一像素点可确定第一图像中的两块备选区域，这两块备选区域的取值与第二图像不同。可以理解的是，这两块备选区域，一块为拖影区域，一块运动物体运动后的区域。进一步的，根据第一图像和第二图像，可获取图像中的运动物体的运动方向，根据运动物体的运动方向以及两块备选区域的位置，可在两块备选区域中确定第一图像中的拖影区域。可选的，还可根据第一图像和第二图像，确定运动物体在第一图像中的区域，两块备选区域中位于运动物体在第一图像中的区域内的备选区域为拖影区域。
示例性的，还可具体根据测试视频中的运动物体的初始位置，运动物体的尺寸，运动物体的运动速率和方向，测试视频的帧率来计算拖影区域。
S103、终端设备根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于评价显示屏的拖影程度。
示例性的，第二图像中的参照区域为与第一图像中的拖影区域具有相同坐标信息的区域。示例性的，当不同显示屏采用相同的测试图像，且测试图像中运动物体的像素值已知时，可直接比较拖影区域中的像素点的像素值。示例性的，如图2所述，当运动物体为黑色方块，则拖影区域中像素点的像素值越小，则拖影程度越重；拖影区域中像素点的像素值越大，则拖影程度越轻。参照图2，图2左侧显示屏1中拖影区域相比图2右侧显示屏 2中拖影区域的拖影程度轻。拖影程度较重的拖影区域的像素点的像素值，与运动物体的像素点的像素值越接近，拖影程度较轻的拖影区域的像素点的像素值，与测试图像中的背景的像素点的像素值越接近。
示例性的，本实施例中，对于任一显示屏，可根据拖影区域和参照区域中的像素点的像素值来确定一第一参数，第一参数指示显示屏的拖影程度。其中，参照区域为第二图像中与拖影区域具有相同位置的区域。
示例性的，当第二图像为拖影前高速相机拍摄得到的图像时，如第二图像采用图4中的图像1，参照区域中的像素点为运动物体的像素点。此时，根据拖影区域和参照区域中的像素点的像素值可获取第一参数，第一参数为能够指示拖影区域和参照区域中的像素点的像素值的接近程度的参数，当第一参数指示越接近则显示屏的拖影程度较高，显示屏质量差。
示例性的，当第二图像为拖影后高速相机拍摄得到的图像时，如第二图像采用图4中的图像6，参照区域中的像素点为运动物体移动后背景图案的像素点。此时，根据拖影区域和参照区域中的像素点的像素值可获取第一参数，第一参数为能够指示拖影区域和参照区域中的像素点的像素值的接近程度的参数，当第一参数指示越接近则显示屏的拖影程度越低，显示屏质量高。
示例性的，第一图像和第二图像可以为RGB格式，也可以为YUV格式。示例性的，当图像格式为RGB格式时，像素点的像素值可以为像素点的R、G、B三个分量值。
可选的，第一参数的一种获取方式为：
终端设备获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值，将差值作为显示屏的第一参数。
示例性的，将第一图像中的拖影区域中各像素点的像素值分别与第二图像中的参照区域中相同位置处的像素点的像素值分别做差，得到的差值称为第一参数，第一参数可以用于指示拖影区域与参照区域的接近程度，因而可用于指示显示屏的拖影程度。
可选的，第一参数的另一种获取方式为：
S11、终端设备获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值。
S12、终端设备获取差值与参照区域中像素点的像素值的比值，将比值作为显示屏的第一参数。
示例性的，考虑到高速相机拍摄显示屏得到第一图像和第二图像，图像中像素点的像素值可能会受到高速相机的传感器曝光值的影响，进而影响第一参数的准确度，因此，本实施例中，进一步获取差值与参照区域中像素点的像素值的比值，将比值作为显示屏的第一参数，进而避免了高速相机的传感器曝光值对第一参数的干扰，提高了第一参数的准确度。
可选的，第一参数除采用上述两种方式获取外，还可采用其他基于拖影区域中像素点的像素值和参照区域中像素点的像素值的获取方式，本申请不再赘述。
可选的，在获取第一参数时，可选用拖影区域中所有像素点的平均像素值与参照区域中所有像素点的平均像素值之间的差值。还可选用拖影区域中选的若干个像素点的平均像素值与参照区域中对应位置处的若干个像素点的平均像素值之间的差值。还可选用拖影区 域中任一一个像素点的像素值与参照区域中对应位置处的像素点的像素值之间的差值。
进一步地，考虑到人眼对亮度较为敏感，在获取第一参数时，可采用像素点的亮度值来代替像素点的像素值，以简化第一参数的获取过程。可选的，终端设备根据拖影区域的像素点的亮度值获取拖影区域的平均亮度值，根据参照区域的像素点的亮度值获取参照区域的平均亮度值，然后根据拖影区域的平均亮度值以及参照区域的平均亮度值，确定显示屏的第一参数。
可选的，在上述任一实施例的基础上，对于任一显示屏，还可获取显示屏的拖影程度随时间的变化曲线，以实现对显示屏的拖影程度的更全面的评价。示例性的，拖影程度随着时间增加减弱的越快的显示屏，质量越好。示例性的，还可采用不同的测试图像，获取在显示不同亮度/颜色的图像时，显示屏的拖影程度。
本申请实施例提供的拖影评价方法，包括：终端设备获取第一图像和第二图像，根据第一图像和第二图像，确定第一图像中的拖影区域，根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于确定显示屏的拖影程度。本实施例中高速相机拍摄显示运动物体的显示屏，得到有拖影的第一图像和无拖影的第二图像，根据拖影区域在第一图像中的拖影以及在第二图像中的对应的参照区域，可确定出显示屏的拖影程度，本实施例中的拖影评价方法可适用于任意显示屏，解决了目前采用拖影长度和拖影持续时长评价显示屏拖影程度时不适用于OLED显示屏的问题。
示例性的，在上述实施例的基础上，本申请实施例还提供一种拖影评价方法。图5为本申请实施例二提供的拖影评价方法的流程示意图。本实施例中根据显示屏的拖影评价结果，确定是否需要进行显示屏的显示调整，提高了显示屏的调整效果。如图5所示，拖影评价方法包括：
S201、终端设备获取第一图像和第二图像。
其中，第一图像为显示屏存在拖影时高速相机拍摄显示屏得到的图像，第二图像为高速相机拍摄拖影后的显示屏得到的图像。
S202、终端设备根据第一图像和第二图像，确定第一图像中的拖影区域。
S203、终端设备根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于确定显示屏的拖影程度。
示例性的，本实施例中的S201至S203与图3所示实施例中的S101至S103相似，本申请不再赘述。
S204、终端设备判断第一参数的取值是否大于预设阈值；若是，则执行S205。
S205、终端设备对显示屏的显示参数进行调整。
示例性的，本实施例中，第二图像为拖影后高速相机拍摄得到的图像。当根据上述拖影评价方法获取得到第一参数，可比较第一参数与预设阈值，当第一参数大于预设阈值，则认为拖影区域中的拖影与参照区域中的背景相差较大，显示屏的拖影程度较重，显示屏质量较差。
为缓解显示屏拖影问题，可对显示屏的显示参数进行调整，使得显示屏显示的拖影与参照区域中的背景越接近，从而缓解了显示屏拖影，提高了用户视觉感受。
示例性的，终端设备对显示屏的显示参数进行调整具体可以为：
终端设备提高显示屏的待显示图像中第一像素点对应的显示参数，降低显示屏的待显示图像中第二像素点对应的显示参数。
其中，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值。
示例性的，显示屏在显示图像时，通过将过亮的像素点调暗，将过暗的像素点调亮，可使得显示屏显示出的图像中拖影区域与拖影区域周边的背景更为接近，从而在视觉上降低了显示屏的拖影程度。
可选的，上述实施例中，显示屏的显示参数为伽玛gamma参数。
示例性的，显示屏在显示图像时，根据图像中像素点的亮度，确定显示屏中对应的像素点的光亮度大小。但是，考虑到人眼对图像中的暗区域更敏感，显示屏的光电转换为非线性的。即，当图像中较暗的像素点和较亮的像素点提高相同亮度时，人眼能够更敏感的注意到较暗的像素点的亮度提升，因此，较亮的几个像素点在屏幕上显示时，为使人眼能区分出不同的像素点，各像素点显示时之间需要较大的光亮度差。
通常，显示屏像素点的输出亮度L out与图像像素亮度的输入亮度L in的关系近似于一曲线函数：Lout＝Lin γ，该曲线称为“伽玛曲线”，其中，γ称为伽玛gamma参数，γ的取值可以为2.2。图6为伽玛曲线的示意图。
可选的，终端设备对显示屏的显示参数进行调整之后，可再次执行S201至S204，判断调整后的显示屏的拖影程度是否满足预设阈值，若不满足，可再次执行S205，直至显示屏的拖影程度满足预设阈值。
可选的，如图5所示，终端设备比较第一参数的取值与预设阈值之后，拖影评价方法还包括：
S206、若第一参数的取值不大于预设阈值，则终端设备确定显示屏的拖影测试通过。
可选的，在S205之前，在确定第一参数的取值大于预设阈值时，拖影评价方法还包括：
S2051、终端设备确定显示屏的拖影测试不通过。
示例性的，终端设备可以文字信息的形式在显示屏上提醒用户当前显示屏拖影测试不通过，显示屏质量较低。
可选的，S2051还可与S205同时执行，或在S205之后执行。
可以理解的是，当第二图像为高速相机拍摄拖影前的显示屏得到的图像时，当第一参数小于预设阈值，则认为显示屏的拖影测试不通过，此时，终端设备对显示屏的显示参数进行调整。具体的调整方法与本实施例相同，本申请不再赘述。
本申请实施例提供的拖影评价方法，在根据第一参数确定显示屏拖影程度较重时，对显示屏的显示参数进行调整，从而减缓显示屏的拖影，提高了用户视觉感受。
本申请另一方面还提供一种拖影改善方法，图7为本申请实施例提供的拖影改善方法的流程示意图。本实施例的执行主体可以为包含显示屏的终端设备。如图7所示，拖影改善方法包括：
S301、终端设备确定待显示图像中的第一像素点和第二像素点。
其中，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素 值；
S302、当在显示屏上显示待显示图像时，终端设备提高第一像素点对应的显示参数，降低第二像素点对应的显示参数。
示例性的，显示屏在显示图像时，通过将过亮的像素点调暗，将过暗的像素点调亮，可使得显示屏显示出的图像中拖影区域与拖影区域周边的背景更为接近，从而在视觉上降低了显示屏的拖影程度。
可选的，上述实施例中，显示屏的显示参数为gamma参数。
示例性的，在上述任一实施例的基础上，考虑到用户使用包含显示屏的终端设备观看电影、电视剧、社交应用中的短视频等对图像对比度要求较高的视频或图像时，用户还可关闭上述拖影调整功能。
示例性的，终端设备默认开启拖影调整功能，在根据上述拖影评价方法检测到显示屏拖影程度较重时，终端设备开启拖影调整功能，对显示屏的显示参数进行调整。但是，当用户使用终端设备观看电影时，可关闭拖影调整功能，保留视频中的细节等信息，避免降低用户的观影感受。
图8A为本申请实施例一提供的电子设备的显示界面的效果示意图。示例性的，如图8A所示，终端设备可在检测到用户正在使用视频播放应用，或者，终端设备查看终端设备的相册时，在显示屏上弹出对话框，对话框中包含有询问用户是否需要关闭拖影改善功能的提醒信息。
示例性的，当用户选择开启拖影改善功能时，还可进一步弹出询问用户拖影改善程度的对话框。示例性的，操作框中设置有“高”、“中”、“低”等多个拖影改善程度档次的标识。对话框中还可设置有滑动条，以方便用户选择合适的拖影改善程度。
可选的，图8B为本申请实施例二提供的电子设备的显示界面的效果示意图，如图8B所示，终端设备的显示界面上可设置有拖影改善的应用选项，用户可通过点击该选项，开启拖影改善应用程序。拖影改善应用程序中用户可进行拖影改善功能的开启或关闭，设置拖影改善程度。示例性的，拖影改善应用程序的操作界面中还提供如亮度调节、色度调节、对比度调节、护眼模式等功能的操作选项，方便用户对显示屏的显示效果的调节。
本申请还提供一种拖影评价装置，用于执行上述图3至图5所示的任一实施例中的拖影评价方法，具有相同或相似的技术特征和技术效果。
本申请还提供一种拖影评价装置，图9为本申请实施例提供的拖影评价装置的结构示意图。如图9所示，拖影评价装置包括：
图像获取模块401，用于获取第一图像和第二图像，第一图像为显示屏存在拖影时显示的图像，第二图像为显示屏在拖影前或拖影后显示的图像；
拖影区域获取模块402，用于根据第一图像和第二图像，确定第一图像中的拖影区域；
第一参数获取模块403，用于根据拖影区域中像素点的像素值以及第二图像中与拖影区域对应的参照区域中像素点的像素值，确定显示屏的第一参数，第一参数用于评价显示屏的拖影程度。
可选的，第一参数获取模块403具体用于，获取拖影区域中像素点的像素值以及参照区域中像素点的像素值之间的差值；将差值作为显示屏的第一参数。
可选的，第一参数获取模块403具体用于，获取拖影区域中像素点的像素值以及参照 区域中像素点的像素值之间的差值；获取差值与参照区域中像素点的像素值的比值，将比值作为显示屏的第一参数。
可选的，如图9所示，第二图像为显示屏在拖影后显示的图像时；拖影评价装置还包括：
拖影调整模块404，用于在第一参数的取值大于预设阈值时，对显示屏的显示参数进行调整。
可选的，拖影调整模块404具体用于，提高显示屏的待显示图像中第一像素点对应的显示参数，降低显示屏的待显示图像中第二像素点对应的显示参数；其中，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值。
可选的，显示参数为gamma参数。
可选的，第一参数获取模块403具体用于，根据拖影区域中像素点的像素值获取拖影区域的平均像素值，根据参照区域中像素点的像素值获取参照区域的平均像素值；根据拖影区域的平均像素值以及参照区域的平均像素值，确定显示屏的第一参数。
可选的，第一参数获取模块403具体用于，根据拖影区域中像素点的亮度值获取拖影区域的平均亮度值，根据参照区域中像素点的亮度值获取参照区域的平均亮度值；根据拖影区域的平均亮度值以及参照区域的平均亮度值，确定显示屏的第一参数。
可选的，如图9所示，拖影评价装置还包括：拖影评价结果获取模块405，用于当第一参数的取值小于或等于预设阈值时，确定显示屏的拖影测试通过；或者，当第一参数的取值大于预设阈值时，确定显示屏的拖影测试不通过。
本申请还提供一种拖影改善装置，用于执行上述图7所示的实施例中的拖影改善方法，具有相同或相似的技术特征和技术效果。
本申请还提供一种拖影改善装置，图10为本申请实施例提供的拖影改善装置的结构示意图。如图10所示，拖影改善装置包括：
像素点获取模块501，用于确定待显示图像中的第一像素点和第二像素点，第一像素点为待显示图像中像素值小于第一预设像素值的像素点，第二像素点为待显示图像中像素值大于第二预设像素值的像素点，第一预设像素值小于第二预设像素值；
调整模块502，用于当在显示屏上显示待显示图像时，提高第一像素点对应的显示参数，降低第二像素点对应的显示参数。
可选的，显示参数为gamma参数。
本申请还提供一种电子设备，用于执行上述图3至图5所示的任一实施例中的拖影评价方法，具有相同或相似的技术特征和技术效果。
图11为本申请实施例提供的电子设备的结构示意图。其中，电子设备可以包括处理器601、存储器602和总线系统603。其中，处理器601和存储器602通过总线系统603相连，该存储器602用于存储指令，该处理器601用于执行该存储器602存储的指令。电子设备的存储器602存储程序代码，且处理器601可以调用存储器602中存储的程序代码执行本申请描述的各种拖影评价方法。为避免重复，这里不再详细描述。
在本申请实施例中，该处理器601可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器601还可以是其他通用处理器、数字信号处理器(DSP)、专 用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器602可以包括只读存储器(ROM)设备或者随机存取存储器RAM)设备。任何其他适宜类型的存储设备也可以用作存储器602。存储器602可以包括由处理器601使用总线系统603访问的代码和数据6021。存储器602可以进一步包括操作系统6022和应用程序6023，该应用程序6023包括允许处理器601执行本申请描述的拖影评价和改善方法的至少一个程序。例如，应用程序6023可以包括应用1至N，其进一步包括执行在本申请描述的拖影评价和改善方法的拖影评价和改善应用。其中，N为正整数。
该总线系统603除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统603。
可选的，电子设备还可以包括一个或多个输出设备，例如诸如显示屏604，本申请的拖影评价和改善方法可以为评价和改善该显示屏604的拖影。显示屏604可以经由总线系统603连接到处理器601。
可选的，当电子设备为高速相机时，显示屏604可以为用于显示拍摄图像的显示屏。此时电子设备仅用于执行部分拖影评价方法。
本申请还提供一种计算机存储介质，存储介质包括计算机程序，计算机程序用于实现上述图3至图5所示的任一实施例中的拖影评价方法。
本申请还提供一种计算机存储介质，存储介质包括计算机程序，计算机程序用于实现上述图7所示的实施例中的拖影改善方法。
本申请还提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述图3至图5所示的任一实施例中的拖影评价方法。
本申请还提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述图7所示的实施例中的拖影改善方法。
本申请还提供一种芯片，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的电子设备执行上述图3至图5所示的任一实施例中的拖影评价方法。
本申请还提供一种芯片，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的电子设备执行上述图7所示的实施例中的拖影改善方法。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
本申请实施例中涉及的处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例中涉及的存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在上述各实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(Solid State Disk，SSD))等。

Claims (15)

  1. 一种拖影评价方法，其特征在于，所述方法包括：
    终端设备获取第一图像和第二图像，所述第一图像为显示屏存在拖影时显示的图像，所述第二图像为所述显示屏在所述拖影前或所述拖影后显示的图像；
    所述终端设备根据所述第一图像和所述第二图像，确定所述第一图像中的拖影区域；
    所述终端设备根据所述拖影区域中像素点的像素值以及所述第二图像中与所述拖影区域对应的参照区域中像素点的像素值，确定所述显示屏的第一参数，所述第一参数用于评价所述显示屏的拖影程度。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备根据所述拖影区域中像素点的像素值以及所述第二图像中与所述拖影区域对应的参照区域中像素点的像素值，确定所述显示屏的第一参数，包括：
    所述终端设备获取所述拖影区域中像素点的像素值以及所述参照区域中像素点的像素值之间的差值；
    所述终端设备将所述差值作为所述显示屏的第一参数。
  3. 根据权利要求1所述的方法，其特征在于，所述终端设备根据所述拖影区域中像素点的像素值以及所述第二图像中与所述拖影区域对应的参照区域中像素点的像素值，确定所述显示屏的第一参数，包括：
    所述终端设备获取所述拖影区域中像素点的像素值以及所述参照区域中像素点的像素值之间的差值；
    所述终端设备获取所述差值与所述参照区域中像素点的像素值的比值，将所述比值作为所述显示屏的第一参数。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述第二图像为所述显示屏在所述拖影后显示的图像；所述方法还包括：
    在所述第一参数的取值大于预设阈值时，所述终端设备对所述显示屏的显示参数进行调整。
  5. 根据权利要求4所述的方法，其特征在于，所述终端设备对所述显示屏的显示参数进行调整，包括：
    所述终端设备提高所述显示屏的待显示图像中第一像素点对应的显示参数，降低所述显示屏的待显示图像中第二像素点对应的显示参数；
    其中，所述第一像素点为所述待显示图像中像素值小于第一预设像素值的像素点，所述第二像素点为所述待显示图像中像素值大于第二预设像素值的像素点，所述第一预设像素值小于所述第二预设像素值。
  6. 根据权利要求5所述的方法，其特征在于，所述显示参数为gamma参数。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，所述终端设备根据所述拖影区域中像素点的像素值以及所述第二图像中与所述拖影区域对应的参照区域中像素点的像素值，确定所述显示屏的第一参数，包括：
    所述终端设备根据所述拖影区域中像素点的像素值获取所述拖影区域的平均像素值，根据所述参照区域中像素点的像素值获取所述参照区域的平均像素值；
    所述终端设备根据所述拖影区域的平均像素值以及所述参照区域的平均像素值，确定所述显示屏的第一参数。
  8. 根据权利要求7所述的方法，其特征在于，所述终端设备根据所述拖影区域中像素点的像素值获取所述拖影区域的平均像素值，根据所述参照区域中像素点的像素值获取所述参照区域的平均像素值，包括：
    所述终端设备根据所述拖影区域中像素点的亮度值获取所述拖影区域的平均亮度值，根据所述参照区域中像素点的亮度值获取所述参照区域的平均亮度值；
    对应的，所述终端设备根据所述拖影区域的平均像素值以及所述参照区域的平均像素值，确定所述显示屏的第一参数，包括：
    所述终端设备根据所述拖影区域的平均亮度值以及所述参照区域的平均亮度值，确定所述显示屏的第一参数。
  9. 根据权利要求4-6中任一项所述的方法，其特征在于，所述方法还包括：
    当所述第一参数的取值小于或等于所述预设阈值时，所述终端设备确定所述显示屏的拖影测试通过；或者，
    当所述第一参数的取值大于所述预设阈值时，所述终端设备确定所述显示屏的拖影测试不通过。
  10. 一种拖影改善方法，其特征在于，应用于包含显示屏的终端设备，所述方法包括：
    所述终端设备确定待显示图像中的第一像素点和第二像素点，所述第一像素点为所述待显示图像中像素值小于第一预设像素值的像素点，所述第二像素点为所述待显示图像中像素值大于第二预设像素值的像素点，所述第一预设像素值小于所述第二预设像素值；
    当在所述显示屏上显示所述待显示图像时，所述终端设备提高所述第一像素点对应的显示参数，降低所述第二像素点对应的显示参数。
  11. 根据权利要求10所述的方法，其特征在于，所述显示参数为gamma参数。
  12. 一种电子设备，其特征在于，包括：处理器、存储器和计算机程序；
    所述计算机程序存储在所述存储器中，所述处理器运行所述计算机程序执行如权利要求1-11中任一项所述的方法。
  13. 一种计算机存储介质，其特征在于，所述存储介质包括计算机程序，所述计算机程序用于实现如权利要求1-11中任一项所述的方法。
  14. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行如权利要求1-11任一项所述的拖影评价方法。
  15. 一种芯片，其特征在于，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的电子设备执行如权利要求1-11任一项所述的方法。
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