WO2024152195A1 - Procédé et appareil de réglage de paramètre pour dispositif d'affichage, procédé et appareil d'affichage, support de stockage et dispositif associé - Google Patents

Procédé et appareil de réglage de paramètre pour dispositif d'affichage, procédé et appareil d'affichage, support de stockage et dispositif associé Download PDF

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Publication number
WO2024152195A1
WO2024152195A1 PCT/CN2023/072606 CN2023072606W WO2024152195A1 WO 2024152195 A1 WO2024152195 A1 WO 2024152195A1 CN 2023072606 W CN2023072606 W CN 2023072606W WO 2024152195 A1 WO2024152195 A1 WO 2024152195A1
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Prior art keywords
gamma curve
target
curve
target gamma
display device
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PCT/CN2023/072606
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English (en)
Chinese (zh)
Inventor
范进华
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西安青松光电技术有限公司
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Priority to CN202380009720.1A priority Critical patent/CN118679516A/zh
Priority to PCT/CN2023/072606 priority patent/WO2024152195A1/fr
Publication of WO2024152195A1 publication Critical patent/WO2024152195A1/fr

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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]

Definitions

  • the present application relates to the field of image display, and in particular to a parameter adjustment, display method, device, storage medium and related equipment of a display device.
  • the gamma curve is a special tone curve used to characterize the mapping relationship between color values and grayscale values. Therefore, the grayscale of the image displayed by the display device can be adjusted according to the gamma curve, that is, the depth of the tone of each pixel of the image.
  • the display device displays an image, it is usually necessary to adjust the grayscale of the displayed image through the gamma curve so that the grayscale of the image displayed by the display device is closer to the actual color of the image.
  • the current gamma curve algorithm has the problem that the low grayscale area has little change, and the display device has poor display details in the low grayscale part when displaying an image.
  • the embodiments of the present application provide a parameter adjustment, display method, device, storage medium and related equipment of a display device, which can solve the problem that the low grayscale area of the current gamma curve algorithm has little change, and the display device has poor display details in the low grayscale part when displaying an image.
  • the technical solution is as follows:
  • an embodiment of the present application provides a parameter adjustment method for a display device, comprising:
  • the parameter adjustment instruction is used to instruct adjustment of a target gamma curve of the display device;
  • the target gamma curve is used to characterize a mapping relationship between a color value corresponding to a target color parameter of an image supported by the display device and a grayscale value corresponding to a target grayscale parameter of the display device;
  • the target gamma curve is adjusted according to the first adjustment point to obtain an adjusted target gamma curve, wherein a curve change rate of a curve segment below the first adjustment point in the adjusted target gamma curve is greater than a curve change rate before the adjustment.
  • an embodiment of the present application provides a display method, including:
  • the target color parameters of the image and the target grayscale parameters of the target display device acquiring an adjusted target gamma curve obtained by using the method described in any one of the first aspects
  • the image is displayed according to the grayscale value of each pixel in the image.
  • an embodiment of the present application provides a parameter adjustment device for a display device, comprising:
  • a receiving module configured to receive a parameter adjustment instruction for the display device, wherein the parameter adjustment instruction is used to instruct adjustment of a target gamma curve of the display device; the target gamma curve is used to characterize a mapping relationship between a color value corresponding to a target color parameter of an image supported for display by the display device and a grayscale value corresponding to a target grayscale parameter of the display device;
  • An acquisition module used for acquiring the target gamma curve and a first adjustment point in the target gamma curve
  • a processing module is used to adjust the target gamma curve according to the first adjustment point to obtain an adjusted target gamma curve, wherein the curve change rate of the curve segment below the first adjustment point in the adjusted target gamma curve is greater than the curve change rate before the adjustment.
  • an embodiment of the present application provides a computer storage medium, wherein the computer storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the above method steps.
  • an embodiment of the present application provides a display device, the device comprising:
  • a first acquisition module used for acquiring an image to be displayed
  • a second acquisition module configured to acquire, according to a target color parameter of the image and a target grayscale parameter of the target display device, an adjusted target gamma curve obtained by using the method described in any one of the first aspects;
  • a third acquisition module used to obtain the grayscale value of each pixel in the image by using the adjusted target gamma curve
  • the display module is used to display the image according to the grayscale value of each pixel in the image.
  • a computer storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the method steps as described in any one of the first aspect or the second aspect.
  • an embodiment of the present application provides an electronic device, which may include: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing any one of the method steps in the first aspect.
  • an embodiment of the present application provides a display device, comprising: a processor, a memory and a display screen; wherein the display screen is used to display images, the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the method steps in the second aspect.
  • the rate of change of the grayscale value in the low grayscale value area is increased, so that when the display device uses the adjusted gamma curve to display an image, the grayscale value difference in the low grayscale value area in the image can be increased, thereby improving the detail expression of the low grayscale value area when the display device displays the image.
  • FIG1 is a schematic diagram of a target gamma curve provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a flow chart of a parameter adjustment method for a display device provided in an embodiment of the present application
  • FIG3 is an adjustment comparison diagram of a low grayscale value portion corresponding to a parameter adjustment method for a display device provided in an embodiment of the present application
  • FIG4 is a schematic flow chart of another parameter adjustment method for a display device provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a first curve segment provided in an embodiment of the present application.
  • FIG6 is a reference schematic diagram of an interface for querying information provided in an embodiment of the present application.
  • FIG7 is a flow chart of a display method provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of an image processing comparison provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of the structure of a parameter adjustment device for a display device provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of the structure of a display device provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
  • the display device involved in the present application may be, for example, the aforementioned light-emitting diode (LED) display device, liquid crystal (LCD) display device, etc.
  • LED light-emitting diode
  • LCD liquid crystal
  • the display device may be a display device that uses a gamma curve to adjust the grayscale of an image, such as a television, a smart phone, a laptop computer, a tablet computer, a camera/camcorder, a projector, or a smart interactive tablet.
  • the hardware part of the smart interactive tablet is composed of a touch display module, an intelligent processing system (including a controller) and other parts, which are combined together by overall structural parts and are also supported by a dedicated software system.
  • the touch display module includes a display screen, a touch component and a backlight component.
  • the backlight component is used to provide a backlight source for the display screen.
  • the display screen generally uses a liquid crystal display device for displaying pictures.
  • the touch component is set on the display screen or at the front end of the display screen to collect the user's touch operation data and send the collected touch operation data to the intelligent processing system for processing.
  • the screen data is displayed on the display screen of the smart interactive tablet.
  • the touch component of the smart interactive tablet will collect the touch data, and the touch component will convert the touch data into coordinate data of the touch point and send it to the intelligent processing system, or send it to the intelligent processing system and convert it into coordinate data of the touch point by the intelligent processing system.
  • the intelligent processing system obtains the coordinate data of the touch point, it implements the corresponding control operation according to the pre-set program, drives the display content of the display screen to change, and realizes a variety of display and operation effects.
  • Touch components can be divided into five basic categories based on technical principles: vector pressure sensing technology touch components, resistance technology touch components, capacitance technology touch components, electromagnetic technology touch screens, infrared technology touch components, and surface acoustic wave technology touch components. According to the working principle of the touch component and the medium for transmitting information, the touch component can be divided into four categories: resistance, capacitance induction, electromagnetic induction, infrared, and surface acoustic wave.
  • the touch component can collect data from the touch point and send it to the intelligent processing system, and then use the built-in software of the intelligent processing system to implement different functional applications, thereby realizing touch control of the intelligent processing system.
  • the grayscale parameter of the display device is used to characterize the range of grayscale values that can be displayed when the display device displays an image.
  • the grayscale parameter can be, for example, 16Bit or 24Bit.
  • the grayscale value of the grayscale parameter of the display can be expressed as (gray_R, gray_G, gray_B).
  • the corresponding relationship between the grayscale parameter and the grayscale value range can be shown in the following Table 1, for example:
  • the grayscale parameter is determined according to the display capability of the display device.
  • the display device may support only one grayscale parameter or multiple grayscale parameters, and switch between multiple grayscale parameters according to actual needs. This application does not impose any restrictions on this.
  • the target display device supports a grayscale parameter of 24Bit at the highest level, and it can also be backward compatible with grayscale parameters that support 16Bit, or backward compatible with grayscale parameters that support 8Bit, etc. That is, the target display device can be backward compatible with any lower grayscale parameter supported by the target display device under the highest supported grayscale parameter, but the specific grayscale parameters that the target display device can be compatible with are related to the gamma curve included in the target display device.
  • the image (Image) involved in this application is a visual image after digitization, that is, a digitized image.
  • the image is formed by displaying different colors by each pixel with pixel points as the basic unit.
  • the color parameter of the image refers to the parameter of the color displayed by the pixel points in the image, and the color parameter is determined by the color mode of the image.
  • the parameter of the color displayed by each pixel point can be expressed as (In_R, In_G, In_B).
  • Table 2 The corresponding relationship between the color parameter and the value range of the color value
  • the gamma curve is used to characterize the mapping relationship between the color value corresponding to a color parameter and the grayscale value corresponding to a grayscale parameter.
  • the display device may support only one grayscale parameter or multiple grayscale parameters.
  • the display device may have a built-in gamma curve for the mapping relationship between the grayscale value corresponding to the grayscale parameter and the color value corresponding to each color parameter.
  • the display device may have a built-in gamma curve for the mapping relationship between the grayscale value corresponding to each grayscale parameter and the color value corresponding to each color parameter.
  • the display device can have the following built-in gamma curves: a gamma curve for the mapping relationship between grayscale values corresponding to 16Bit and color values corresponding to 8Bit, a gamma curve for the mapping relationship between grayscale values corresponding to 16Bit and color values corresponding to 10Bit, and a gamma curve for the mapping relationship between grayscale values corresponding to 16Bit and color values corresponding to 12Bit.
  • the display device can also have the following gamma curves built in in addition to the aforementioned 16-bit related gamma curve: a gamma curve for the mapping relationship between the grayscale value corresponding to 24-bit and the color value corresponding to 8-bit, and a gamma curve for the mapping relationship between the grayscale value corresponding to 24-bit and the color value corresponding to 10-bit.
  • the display device when displaying an image, the display device will obtain the grayscale value of each pixel in the image to be displayed based on the target gamma curve that characterizes the mapping relationship between the color value corresponding to the target color parameter and the grayscale value corresponding to the target grayscale parameter, as well as the color value of each pixel corresponding to the target color parameter of the image to be displayed, and display the image according to the grayscale value.
  • N is the gamma value of the target gamma curve, and its value range is usually 1.0-4.0.
  • This application takes the gamma value of 2.8 as an example for explanation.
  • x is the color value after the target color parameter is normalized
  • y is the grayscale value after normalization corresponding to the value of x.
  • the color value of the color parameter is normalized to the interval [0-1] to obtain x, for example, In_R/255.
  • the normalized grayscale value is converted back into the interval of the grayscale value corresponding to the grayscale parameter 16Bit, that is, 65535y, through the value range of the grayscale value corresponding to the grayscale parameter 16Bit, that is, [0, 65535].
  • a target gamma curve can be obtained.
  • the target gamma curve can be shown in FIG1 , for example.
  • mapping relationship between the color value and the grayscale value in the low grayscale value area between In_R and gray_R is shown in the following Table 3:
  • the first four values of gray_R are all 0, that is, the gray_R values are the same for different In_R values; the difference between the last five values of gray_R is small, that is, the gray_R value changes slightly for different In_R values. Therefore, when this target gamma curve is used for image display, the grayscale value difference in the low grayscale value area of the image is small, resulting in poor detail expression.
  • the present application proposes a display method and a parameter adjustment method for a display device, by adjusting the The low grayscale value area of the gamma curve increases the rate of change of the grayscale value in the low grayscale value area, so that when the display device uses the adjusted gamma curve to display an image, the grayscale value difference in the low grayscale value area in the image can be increased, thereby improving the detail expression of the low grayscale value area when the display device displays the image.
  • the execution subject of the parameter adjustment method of the display device can be a computing device, a cloud platform, or the display device itself.
  • the computing device can be, for example, a computer, a smart phone, or other device with computing capabilities.
  • Software for running the parameter adjustment method of the display device can be deployed on the computing device, and the parameters of the display device are adjusted by the software to obtain the adjusted gamma curve, and the gamma curve is sent to the display device.
  • the execution subject is a cloud platform
  • the parameter adjustment method of the display device can be provided to the target display device as a cloud service.
  • the display device has the function of the parameter adjustment method of the display device to adjust its own parameters.
  • the parameter adjustment of the display device may be performed before the display device leaves the factory, or may be performed during the use of the display device, and this application does not impose any restrictions on this.
  • Figure 2 is a flow chart of a parameter adjustment method for a display device disclosed in an embodiment of the present application.
  • Figure 2 takes the execution subject as a computing device as an example.
  • the parameter adjustment method for the display device may include the following steps:
  • the parameter adjustment instruction is used to instruct the adjustment of the target gamma curve of the display device
  • the target gamma curve is used to characterize the mapping relationship between the color values corresponding to the target color parameters of the image supported by the display device and the grayscale values corresponding to the target grayscale parameters of the display device.
  • the display capability of the display device there may be multiple such gamma curves in the display device, corresponding to the mapping relationship between different types of color parameters and grayscale parameters, and the mapping relationship corresponding to different gamma values N, such as the mapping relationship between 8-bit color parameters and 16-bit grayscale parameters when the gamma value N is equal to 2.8, the mapping relationship between 8-bit color parameters and 24-bit grayscale parameters when the gamma value N is equal to 2.8, and the mapping relationship between 8-bit color parameters and 16-bit grayscale parameters when the gamma value N is equal to 2.9.
  • the computing device may determine the gamma curve that needs to be adjusted as the target gamma curve according to actual needs.
  • the computing device can determine the target gamma curve based on the color parameters of the image and the grayscale parameters selected by the display device; when the gamma value N can be adjusted according to actual needs, the computing device first obtains the current gamma value of the display device, and then determines the target gamma curve corresponding to the gamma value based on the color parameters of the image and the grayscale parameters selected by the display device.
  • the display device may actively send the parameter adjustment instruction to the computing device; or after the computing device sends a parameter adjustment request to the display device, the display device responds to the parameter adjustment request and sends the parameter adjustment instruction to the computing device; or the user of the computing device triggers the receipt of the parameter adjustment instruction on the computing device side.
  • S202 Acquire a target gamma curve and a first adjustment point in the target gamma curve.
  • the first adjustment point is used to indicate the low grayscale value area in the target gamma curve, that is, the first adjustment point represents the dividing point between the low grayscale value area and the non-low grayscale value area in the target gamma curve.
  • the part below the vertical axis coordinate of the first adjustment point is the low grayscale value area.
  • Methods for obtaining the target gamma curve may include the following:
  • Implementation A2 If the parameter adjustment instruction includes a target grayscale parameter and a target color parameter, then the target gamma curve is obtained from the gamma curve set according to the target grayscale parameter and the target color parameter.
  • the gamma curve set includes at least one gamma curve.
  • the method of obtaining the gamma curve set may be, for example, that the computing device obtains all gamma curves in the display device as a gamma curve set, or that the computing device determines all gamma curves in the display device that meet the current gamma value as a gamma curve set according to the gamma value, or that the gamma curve set is obtained by obtaining a pre-stored gamma curve from the computing device itself, etc.
  • Implementation A3 Using the gamma curves corresponding to all grayscale parameters and color parameters supported by the display device as the target gamma curve.
  • the computing device needs to adjust the gamma curves corresponding to all grayscale parameters and color parameters supported by the display device.
  • Methods for obtaining the first adjustment point in the target gamma curve may include the following:
  • Implementation method B1 If the parameter adjustment instruction includes a first adjustment point, the first adjustment point is obtained from the parameter adjustment instruction.
  • Implementation B2 Obtaining a first adjustment point in a preset target gamma curve.
  • the target gamma curve is a gamma curve preset in the computing device, for example, it may be a gamma curve in a gamma curve set, which are the same as the gamma curves described in Implementation A2 and are not described in detail here.
  • a first adjustment point corresponding to each gamma curve is preset in the computing device, or each gamma curve carries information of a preset first adjustment point.
  • Implementation B3 Obtaining a first adjustment point according to a curve change of a target gamma curve.
  • the computing device can autonomously identify the curve change rate of the target gamma curve, and when the curve change rate is equal to a preset threshold, use the point corresponding to the current curve change rate as the first adjustment point.
  • the coordinates of the first adjustment point can be directly obtained from the target gamma curve, that is, under the target gamma curve, the corresponding relationship between the color value and the grayscale value of each pixel is stored, and the horizontal coordinate and the vertical coordinate of the first adjustment point can be directly obtained.
  • the coordinates of the first adjustment point can also be obtained by calculating another coordinate based on the target gamma curve and the vertical coordinate or the horizontal coordinate of the first adjustment point. For example, the vertical coordinate of the first adjustment point is substituted into the function expression of the target gamma curve to calculate the horizontal coordinate of the first adjustment point, so as to obtain the coordinates of the first adjustment point based on the vertical coordinate and the horizontal coordinate of the first adjustment point.
  • the above are merely exemplary implementations of obtaining a target gamma curve and a first adjustment point in the target gamma curve.
  • the methods of obtaining the first adjustment point and the target gamma curve may be combined at will according to the above implementations.
  • the curve change rate of the first curve segment in the adjusted target gamma curve is greater than the curve change rate of the first curve segment in the target gamma curve before adjustment.
  • the first curve segment includes a curve segment in the target gamma curve located below the first adjustment point.
  • a possible implementation method is to draw a straight line segment with the origin of the target gamma curve (i.e., the coordinate point (0, 0)) and the first adjustment point as endpoints, and use the straight line segment as the adjusted first curve segment. Then, the first curve segment is spliced with the curve segment of the target gamma curve whose grayscale value is greater than the grayscale value of the first adjustment point, and the spliced curve segment is used as the adjusted target gamma curve.
  • the curve change rate of the straight line segment with the origin of the target gamma curve and the first adjustment point as endpoints is greater than the curve change rate of the target gamma curve, thereby increasing the change rate of the curve segment below the first adjustment point in the adjusted target gamma curve, that is, increasing the difference in grayscale values in the low grayscale value area in the image, thereby improving the effect of expressing details in the low grayscale value area when displaying the image.
  • Another possible implementation is to use the tangent line at the first adjustment point in the target gamma curve as a basis, and use the line segment from the point on the horizontal axis of the target gamma curve to the first adjustment point as the first curve segment, and then splice the first curve segment with the curve segment of the target gamma curve whose grayscale value is greater than the grayscale value of the first adjustment point, and horizontally stretch the horizontal axis of the spliced curve to obtain the curve segment as the adjusted target gamma curve.
  • the adjusted target gamma curve obtained by this implementation has a smooth curve change rate at the first adjustment point (i.e., the splicing point), that is, the first curve segment and the curve segment of the target gamma curve whose grayscale value is greater than the grayscale value of the first adjustment point are spliced in a smooth manner, which increases the difference in grayscale values of low grayscale value areas in the image and improves the effect of detail expression of low grayscale value areas when displaying the image, and can also prevent the problem of poor image expression caused by grayscale value jumps at the splicing point when displaying the image.
  • the first adjustment point i.e., the splicing point
  • FIG3 is an adjustment comparison diagram of the low grayscale value part corresponding to the parameter adjustment method of the display device provided in an embodiment of the present application.
  • the parameter adjustment method of the display device provided in an embodiment of the present application increases the gap between different grayscale values in the low grayscale value area of the image, and improves the effect of detail expression of the low grayscale value area when the image is displayed.
  • the gap between different grayscale values in the low grayscale value area of the image is small, which is lower than the grayscale value change rate of the adjusted target gamma curve. Therefore, the detail expression of the low grayscale value area when the image is displayed is weaker than the effect of display according to the adjusted target gamma curve.
  • FIG4 is a flow chart of another method for adjusting parameters of a display device provided in an embodiment of the present application. As shown in FIG4 , the above step S203 may include:
  • the coordinates of the first adjustment point are substituted into the tangent function of the first adjustment point to obtain the intercept a of the tangent function of the first adjustment point. Since in the tangent function of the first adjustment point, the slope k is y′, the intercept a can also be obtained by the above calculation, so the function expression of the tangent at the first adjustment point can be obtained.
  • a line segment between a point where the tangent is located on the abscissa axis of the target gamma curve and a first adjustment point is obtained as a first curve segment.
  • FIG5 is a schematic diagram of obtaining the first curve segment when the ordinate of the first adjustment point (i.e., the grayscale value after conversion corresponding to the grayscale parameter, i.e., the grayscale value range is [0, 65535]) is 22.
  • point m is the first adjustment point
  • point n is the point where the tangent is located on the abscissa axis of the target gamma curve
  • line segment mn is the first curve segment
  • the slope of the line segment mn is the slope of the tangent to the first adjustment point N ⁇ x N-1 .
  • Point q is the point where the maximum grayscale value corresponding to the target gamma curve is located (i.e., the end point of the target gamma curve), and its coordinates are (255, 65535). Point q is not marked in FIG5.
  • the first curve segment is spliced with a second curve segment located above the first adjustment point in the target gamma curve to obtain a third curve segment.
  • the curve mq on the right side of point m is the second curve segment, which is a curve segment in the target gamma curve.
  • the line segment mn is concatenated with the second curve segment mq to obtain the third curve segment nmq.
  • the corresponding color value ranges from the horizontal coordinate of point n to the horizontal coordinate of point q (255).
  • the third curve segment currently obtained by splicing does not cover the entire value range of the color value corresponding to the target color parameter, for example, in FIG5 , the color value 0 to n points are not covered. Therefore, after obtaining the third curve segment nmq, the third curve segment can be stretched according to the value range of the color value corresponding to the target color parameter, so that the stretched third curve segment nmq can cover the entire value range of the color value corresponding to the target color parameter (i.e., [0, 255]).
  • the stretched third curve segment is the adjusted target gamma curve.
  • the third curve segment may be stretched in the following manner:
  • the color value and grayscale value in the third curve segment are normalized.
  • the normalized intercept a of the first curve segment is obtained, for example, as shown in the following formula (1):
  • the value of x1 is the color value corresponding to point n (the coordinate of the intersection of the third curve segment and the x-axis).
  • the stretching ratio c used when stretching the normalized color value of the third curve segment nmq to the interval [0-1] is determined, for example, as shown in the following formula (3):
  • the third curve segment is horizontally stretched according to the stretching ratio c to obtain the stretched third curve segment.
  • the starting point of the stretched third curve segment is located at the origin of the coordinate axis, and the coordinates of the end point are (255, 65535).
  • the corresponding relationship between the normalized color value and the original color value on the horizontal axis of the stretched third curve segment can be determined by the stretching ratio c, the normalized color value before stretching, and the color value corresponding to the n point, and the calculation method is shown in formula (4):
  • the function expression of the first curve segment and the function expression of the second curve segment are substituted respectively to obtain the grayscale value corresponding to the above color index in the first curve segment after stretching, and the grayscale value corresponding to the above color index in the second curve segment after stretching.
  • whether to substitute the function expression of the first curve segment or the function expression of the second curve segment needs to be judged according to the color value of the first adjustment point after stretching.
  • the mapping relationship between the color value and the adjusted grayscale value can be represented by the stretched third curve segment, that is, the function expression corresponding to the mapping relationship is the adjusted target gamma curve.
  • the first four values of gray_R1 (after adjustment) in the low grayscale value part are 0, 3, 6, and 8 respectively.
  • the grayscale value difference of gray_R1 is obviously much greater than that of gray_R. Therefore, the adjusted gamma curve can significantly improve the grayscale value difference of the low grayscale value area in the image and improve the detail expression when the display device displays the image.
  • the first curve segment and the second curve segment can have the same slope at the splicing point (first adjustment point) when spliced, thereby making the smoothness of the third curve segment better, thereby making the adjusted gamma curve smooth, preventing the problem of grayscale value jumps in the adjusted gamma curve, and improving the stability of image display.
  • the first curve segment is translated and stretched to obtain the adjusted first curve segment.
  • the starting point of the adjusted first curve segment is the starting point of the target gamma curve.
  • the first curve segment is translated and stretched in a manner that the starting point of the first curve segment is first translated to the origin of the coordinate system (0, 0), and then the end point of the first curve segment is stretched along the slope of the first curve segment until the adjusted first curve segment intersects with the target gamma curve.
  • the curve segment after the coincidence point in the target gamma curve is taken as the second curve segment, and the first curve segment after the adjustment is The line segments are spliced to obtain the adjusted target gamma curve.
  • the parameter adjustment method for the display device obtains a tangent at a first adjustment point in a target gamma curve through a computing device, and obtains, based on the tangent, a line segment from a point on the horizontal axis of the target gamma curve to the first adjustment point as a first curve segment, and then splices and stretches the first curve segment with the target gamma curve to obtain an adjusted target gamma curve, thereby increasing the difference in grayscale values in low grayscale value areas in an image and improving the effect of detail expression in low grayscale value areas when displaying an image.
  • the method may further include:
  • the query information is output.
  • the query information is used to inquire whether to configure the adjusted target gamma curve for the display device.
  • the query information can be displayed on the interface of the software installed on the computing device that uses the parameter adjustment method of the display device, or can be displayed on the display device. This application does not limit the output method of the query information, for example, it can be output in the form of a pop-up window.
  • FIG. 6 is a possible interface reference for the inquiry information. It should be understood that FIG. 6 is only a possible implementation of the inquiry information window, and the present application is not limited to this implementation, as long as any method that can output the inquiry information is acceptable.
  • Interaction 1 In response to the query information, if a configuration instruction is received, an adjusted target gamma curve is configured for the display device.
  • the method of responding to the inquiry information can be triggered by a user or a display device configuration personnel, or the computing device, display device, or terminal device automatically responds after waiting for a preset time.
  • the user needs to click the "Confirm Configuration" button in the inquiry information window to respond to the inquiry information.
  • the confirmed configuration is used to indicate sending the configuration instruction.
  • Interaction 2 In response to the inquiry information, if a re-adjustment instruction is received, a second adjustment point in the target gamma curve is obtained, and based on the second adjustment point, an adjusted target gamma curve is re-obtained.
  • the method of responding to the information is the same as that of interaction 1, and will not be repeated here.
  • the user clicks the "Readjust" button in the inquiry information window to respond to the inquiry information, so that the computing device switches the adjustment point to the second adjustment point and reconfigures the adjusted target gamma curve.
  • the method of obtaining the second adjustment point can be obtained according to a preset rule. For example, when a re-adjustment instruction is received, the preset interval is increased or decreased on the basis of the first adjustment point according to the preset rule, so as to obtain the second adjustment point. It should be understood that the above is only an example of a preset rule, and the present application does not limit the preset rules.
  • the method of obtaining the second adjustment point can also be obtained by randomly adjusting the grayscale value of the first adjustment point, or the second adjustment point input by the user according to actual needs.
  • the query information may be repeatedly sent and the corresponding interaction may be performed until the adjusted target gamma curve is adjusted to meet the actual needs of the user or display device configuration personnel.
  • the method provided in the embodiment of the present application enables a user or display device configuration personnel to continuously obtain an adjusted target gamma curve and an adjusted image according to actual needs through a variety of interactive modes, thereby obtaining a display effect that meets actual needs.
  • the display method is performed by a display device that uses a gamma curve to display images, such as the aforementioned LED display device, LCD display device, etc., which will not be described in detail here. limited.
  • Figure 7 is a flow chart of a display method disclosed in an embodiment of the present application. As shown in Figure 7, the display method may include the following steps:
  • S701 Acquire an image to be displayed.
  • the image to be displayed may be obtained from the outside by the target display device, or may be stored in the memory of the target display device.
  • the image to be displayed may be obtained from a network, or obtained from a storage device according to a Universal Serial Bus (USB) interface, or obtained from other devices through a High Definition Multimedia Interface (HDMI), etc.
  • USB Universal Serial Bus
  • HDMI High Definition Multimedia Interface
  • the target display device may obtain the image to be displayed by directly reading its memory.
  • S702 Acquire an adjusted target gamma curve according to the target color parameters of the image and the target grayscale parameters of the target display device.
  • the target color parameter of the image is determined according to the properties of the image itself, and the target display device can determine the target color parameter according to the data format of the image.
  • the target color parameter is the color parameter mentioned above, which will not be described here.
  • the target display device When the parameter adjustment method of the display device is executed by the display device itself, the target display device obtains the adjusted target gamma curve according to the target gamma curve and stores it in the display device; when the parameter adjustment method of the display device is executed by the computing device or the cloud platform, the adjusted target gamma curve is input to the target display device through the computing device or the cloud platform.
  • the target display device according to the display capability of the display device, multiple adjusted gamma curves can be built-in.
  • the adjusted gamma curve 1 corresponds to an image with a color parameter of 8Bit, and the grayscale parameter of the display device is 16Bit;
  • the adjusted gamma curve 2 corresponds to an image with a color parameter of 10Bit, and the grayscale parameter of the display device is 16Bit;
  • the adjusted gamma curve 3 corresponds to an image with a color parameter of 10Bit, and the grayscale parameter of the display device is 24Bit, etc.
  • the adjusted gamma curve has a higher rate of change of the low grayscale value part than the gamma curve used in the prior art, so that when the image is displayed on the target display device, the grayscale value difference of the low grayscale value part is larger, and the image details in the low grayscale value area are more expressive when the image is displayed.
  • the target display device determines an adjusted target gamma curve from a plurality of adjusted gamma curves according to a target color parameter of the image and a target grayscale parameter of the target display device.
  • S704 Display the image according to the grayscale value of each pixel in the image.
  • the method by which the target display device obtains the grayscale value of each pixel in the image using the adjusted target gamma curve, and the method by which the image is displayed according to the grayscale value of each pixel in the image are the same as the corresponding methods described in the aforementioned prior art and will not be repeated here.
  • FIG8 is a schematic diagram of an image processing comparison provided in an embodiment of the present application.
  • the display device uses the target gamma curve to display the image
  • the display device uses the adjusted target gamma curve to display the image.
  • the low grayscale value area in the image taking the white frame as an example
  • the target gamma curve before adjustment there is no gap or a small gap between the low grayscale values. Therefore, in the low grayscale value area, the brightness difference between the colors of the image is very small, so the picture details are displayed poorly.
  • the adjusted target gamma curve improves the brightness difference between the low grayscale values. Therefore, when the adjusted target gamma curve is used for image display, the grayscale value difference between different colors in the low grayscale value area of the image is large, so more picture details can be displayed in the low grayscale value area.
  • the adjusted target gamma curve is obtained through the target color parameters of the image and the target grayscale parameters of the target display device, and then the grayscale value of each pixel in the image is obtained according to the adjusted target gamma curve, and the image is displayed according to the grayscale value of each pixel in the image. Since the adjusted target gamma curve increases the rate of change of the low grayscale value part, the problem of small difference in grayscale value and poor detail expression in the low grayscale value area of the image when the display device displays the image described in the background technology will not occur.
  • the adjusted target gamma curve increases the rate of change of the low grayscale value part, it can achieve the effect of increasing the difference in grayscale value of the low grayscale value area in the image when the target display device displays the image, and improving the detail expression of the low grayscale value area when the image is displayed.
  • the above-mentioned image can also be a frame image in a video, and the effect of adjusting the video display effect can be achieved by adjusting the display effect of some frame images or all frame images in the video.
  • Figure 9 shows a schematic diagram of the structure of a parameter adjustment device for a display device provided by an exemplary embodiment of the present application.
  • the parameter adjustment device for the display device can be implemented as all or part of a computing device, a display device, or a cloud platform through software, hardware, or a combination of both.
  • the device includes a receiving module 11, an acquisition module 12, and a processing module 13.
  • a possible implementation method also includes an interaction module 14.
  • the receiving module 11 is used to receive parameter adjustment instructions for the display device, where the parameter adjustment instructions are used to instruct adjustment of the target gamma curve of the display device; the target gamma curve is used to characterize the mapping relationship between the color values corresponding to the target color parameters of the image supported by the display device and the grayscale values corresponding to the target grayscale parameters of the display device.
  • the acquisition module 12 is used to acquire a target gamma curve and a first adjustment point in the target gamma curve.
  • the processing module 13 is used to adjust the target gamma curve according to the first adjustment point to obtain an adjusted target gamma curve, wherein the curve change rate of the curve segment below the first adjustment point in the adjusted target gamma curve is greater than the curve change rate before the adjustment.
  • the image is a frame of image in a video.
  • the processing module 13 is specifically used to obtain a tangent line located at a first adjustment point in the target gamma curve.
  • a line segment between a point where the tangent line is located on the horizontal axis of the target gamma curve and the first adjustment point is obtained as a first curve segment.
  • the target gamma curve is adjusted to obtain an adjusted target gamma curve.
  • a possible implementation method is that the processing module 13 is specifically used to splice the first curve segment with the second curve segment located above the first adjustment point in the target gamma curve to obtain a third curve segment. According to the value range of the color value corresponding to the target color parameter, the third curve segment is stretched to obtain an adjusted target gamma curve.
  • the processing module 13 is specifically configured to perform a translation and stretching transformation on the first curve segment according to the starting point of the target gamma curve and the first adjustment point to obtain an adjusted first curve segment; the starting point of the adjusted first curve segment is the starting point of the target gamma curve.
  • the acquisition module 12 is specifically used to acquire the target gamma curve from the parameter adjustment instruction if the parameter adjustment instruction includes a target gamma curve.
  • the parameter adjustment instruction includes a target grayscale parameter and a target color parameter
  • the target gamma curve is acquired from the gamma curve set according to the target grayscale parameter and the target color parameter.
  • the gamma curves corresponding to all grayscale parameters and color parameters supported by the display device are used as the target gamma curve.
  • the acquisition module 12 is specifically used to acquire the first adjustment point from the parameter adjustment instruction if the parameter adjustment instruction includes the first adjustment point.
  • the interaction module 14, after the processing module 13 obtains the adjusted target gamma curve, is used to output an inquiry message when the display device uses the target gamma curve to display an image with target color parameters; the inquiry message is used to inquire whether to configure the adjusted target gamma curve for the display device.
  • the processing module 13 In response to the inquiry message, if a configuration instruction is received, the processing module 13 is also used to configure the adjusted target gamma curve for the display device.
  • the processing module 13 is also used to obtain a second adjustment point in the target gamma curve, and re-acquire the adjusted target gamma curve based on the second adjustment point.
  • the parameter adjustment device for the display device provided in the above embodiment only uses the division of the above functional modules as an example when executing the parameter adjustment method for the display device.
  • the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
  • the parameter adjustment device for the display device provided in the above embodiment and the parameter adjustment method embodiment of the display device belong to the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.
  • FIG10 shows a schematic diagram of the structure of a display device provided by an exemplary embodiment of the present application.
  • the device includes a first acquisition module 21 , a second acquisition module 22 , a third acquisition module 23 and a display module 24 .
  • the first acquisition module 21 is used to acquire an image to be displayed.
  • the second acquisition module 22 is used to obtain an adjusted target gamma curve obtained by any method of adjusting parameters of the display device according to the target color parameters of the image and the target grayscale parameters of the target display device.
  • the third acquisition module 23 is used to acquire the grayscale value of each pixel in the image by using the adjusted target gamma curve.
  • the display module 24 is used to display the image according to the grayscale value of each pixel in the image.
  • the display device provided in the above embodiment executes the display method
  • only the division of the above functional modules is used as an example.
  • the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • the display device provided in the above embodiment and the display method embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment, which will not be repeated here.
  • An embodiment of the present application also provides a computer storage medium, which can store multiple instructions, and the instructions are suitable for being loaded by a processor and executing the method steps of the embodiments shown in Figures 1 to 8 above.
  • the specific execution process can be found in the specific description of the embodiments shown in Figures 1 to 8, and will not be repeated here.
  • the device where the storage medium is located may be a computing device, a display device, or a cloud platform.
  • FIG 11 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
  • the electronic device may be a computing device or a display device.
  • the electronic device 1100 may include: at least one processor 1101, at least one memory 1103, at least one communication bus 1104, and a communication interface 1102.
  • the communication bus 1104 is used to realize the connection and communication between these components.
  • the communication interface 1102 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
  • the processor 1101 may include one or more processing cores.
  • the processor 1101 uses various interfaces and lines to connect various parts of the entire electronic device 1100, and executes various functions and processes data of the electronic device 1100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1105, and calling data stored in the memory 1105.
  • the processor 1101 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA).
  • DSP digital signal processing
  • FPGA field-programmable gate array
  • PDA programmable logic array
  • the processor 1101 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem.
  • the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; and the modem is used to process wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processor 1101, but may be implemented by a separate chip.
  • the memory 1103 may include a random access memory (RAM) or a read-only memory (Read-Only Memory).
  • the memory 1103 includes a non-transitory computer-readable storage medium.
  • the memory 1103 can be used to store instructions, programs, codes, code sets or instruction sets.
  • the memory 1105 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc.
  • the memory 1103 may also be optionally at least one storage device located away from the aforementioned processor 1101.
  • the electronic device 1100 further includes at least one display screen 1105, and the display screen 1105 is used to display the images in the above-mentioned various method embodiments.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • a computing device includes one or more processors (CPU), input/output interfaces, network interfaces, and memory.
  • processors CPU
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and/or non-volatile memory in the form of read-only memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
  • RAM random access memory
  • ROM read-only memory
  • flash RAM flash memory
  • Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information.
  • Information can be computer readable instructions, data structures, program modules or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.
  • computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Un procédé et un appareil de réglage de paramètre pour dispositif d'affichage, un procédé et un appareil d'affichage, un support de stockage et un dispositif associé. Le procédé d'affichage consiste à : acquérir une image à afficher (S701) ; en fonction d'un paramètre de couleur cible de l'image et d'un paramètre d'échelle de gris cible d'un dispositif d'affichage cible, acquérir une courbe gamma cible ajustée obtenue à l'aide d'un procédé servant à ajuster une courbe gamma cible au moyen d'un premier point de réglage (S702) ; acquérir une valeur d'échelle de gris de chaque point de pixel dans l'image à l'aide de la courbe gamma cible ajustée (S703) ; et afficher l'image en fonction de la valeur d'échelle de gris de chaque point de pixel dans l'image (S704). La différence de valeur d'échelle de gris d'une zone à faible valeur d'échelle de gris dans une image peut être augmentée, et l'expressivité des détails de la zone à faible valeur d'échelle de gris lorsqu'un dispositif d'affichage affiche l'image est améliorée.
PCT/CN2023/072606 2023-01-17 2023-01-17 Procédé et appareil de réglage de paramètre pour dispositif d'affichage, procédé et appareil d'affichage, support de stockage et dispositif associé WO2024152195A1 (fr)

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PCT/CN2023/072606 WO2024152195A1 (fr) 2023-01-17 2023-01-17 Procédé et appareil de réglage de paramètre pour dispositif d'affichage, procédé et appareil d'affichage, support de stockage et dispositif associé

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