WO2022156748A1 - 基于拍摄角度的led显示屏亮度调节方法及拍摄系统 - Google Patents

基于拍摄角度的led显示屏亮度调节方法及拍摄系统 Download PDF

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Publication number
WO2022156748A1
WO2022156748A1 PCT/CN2022/073013 CN2022073013W WO2022156748A1 WO 2022156748 A1 WO2022156748 A1 WO 2022156748A1 CN 2022073013 W CN2022073013 W CN 2022073013W WO 2022156748 A1 WO2022156748 A1 WO 2022156748A1
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Prior art keywords
brightness
led display
camera
display screen
angle
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PCT/CN2022/073013
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English (en)
French (fr)
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吴涵渠
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深圳市奥拓电子股份有限公司
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Publication of WO2022156748A1 publication Critical patent/WO2022156748A1/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
    • G09G3/22—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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • the solution relates to the field of LED display screens, in particular to a method and a shooting system for adjusting the brightness of an LED display screen based on a shooting angle.
  • LED displays have the advantages of bright colors, high brightness, long life, and energy saving, so they are widely used. With the continuous development of small-pitch technology, LED displays can achieve 4K/8K ultra-high resolution and ultra-high contrast. Because of this, LED displays have successfully entered the field of film and television shooting as the background for film and television shooting. The LED display as the background of film and television shooting can provide real light source effect. Using the seamless splicing technology of the LED display, an immersive picture can be constructed, so that the actor can intuitively feel the picture in the scene, quickly enter the role, and fully participate in the performance.
  • the observed luminous intensity of the LED display screen is different.
  • the brightness of the background picture provided by the LED display is different in the picture captured by the camera, which causes the brightness of the captured picture to be flickering, which affects the Shooting effect.
  • An embodiment of the present application provides a method for adjusting the brightness of an LED display screen based on a shooting angle, including:
  • the display brightness of the LED display screen is correspondingly controlled.
  • the step of acquiring the position data and shooting angle of the camera specifically includes:
  • the movement data of the camera determine the position change of the camera, and combine with the initial position to obtain the position data of the camera.
  • the position data of the camera further includes a height; the offset angle is an angle in a three-dimensional coordinate system.
  • the number of the cameras is multiple; the step of correspondingly controlling the display brightness of the LED display screen according to the brightness compensation coefficient is specifically:
  • the corresponding brightness compensation coefficient is used to control the display brightness of the LED display screen accordingly.
  • the sampled offset angles and their compensation coefficients are fitted to a brightness compensation curve.
  • an LED display control device which is used for the control of an LED display screen for photography, including an offset angle calculation unit, a compensation matching unit, a display control unit, and a memory, wherein the memory stores a preset The established brightness compensation database;
  • the offset angle calculation unit is used to obtain the position data and the shooting angle of the camera, and calculate the offset angle of the camera relative to the LED display screen according to the position data and the shooting angle;
  • the compensation matching unit is configured to match the brightness compensation coefficient corresponding to the offset angle from the brightness compensation database stored in the memory according to the offset angle;
  • the display control unit is used for correspondingly controlling the display brightness of the LED display screen according to the brightness compensation coefficient.
  • the display control unit is specifically configured to allocate different display time periods to the brightness compensation coefficients corresponding to each camera within one display period according to the shutter times of multiple cameras; within one display period In each display time period, the corresponding brightness compensation coefficient is used to control the display brightness of the LED display accordingly.
  • Another embodiment of the present application further provides a shooting system, including an LED display control device, an LED display screen, and a camera, the LED display control device controls the display content and display effect of the LED display screen, and the camera sends the
  • the LED display control device provides position data and a shooting angle;
  • the LED display control device is the LED display control device described in any of the foregoing embodiments, receives the position data and shooting angle of the camera, calculates the offset angle of the camera, and According to the brightness compensation coefficient matched by the offset angle, the display brightness of the LED display screen is correspondingly controlled.
  • the camera is provided with a gyroscope and a shooting angle sensor; the shooting angle sensor is used to detect the shooting angle of the camera; the gyroscope is used to collect movement data of the camera; The camera determines the position data of the camera according to the stored initial position in combination with the movement data.
  • Another embodiment of the present application further discloses a storage medium on which a computer program is stored, and when the computer program is executed by a processor, realizes the brightness adjustment of the LED display screen based on the shooting angle according to any one of the foregoing embodiments method.
  • compensation coefficients under different offset angles are calculated in advance based on the same target brightness value.
  • the offset of the camera relative to the LED display can be calculated in real time according to the Angle, find the corresponding compensation coefficient, so that the LED display screen can have the same display brightness under different offset angles, so that the brightness of the captured picture remains consistent, effectively guaranteeing the shooting effect.
  • FIG. 1 is a schematic diagram of a frame structure of a photographing system according to an embodiment of the application
  • FIG. 2 is a schematic flowchart of a method for adjusting the brightness of an LED display screen based on a shooting angle according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of an offset angle of a camera relative to an LED display screen in an embodiment of the application
  • Figure 4 is a schematic diagram of the display brightness change of the LED display screen at different offset angles when no brightness compensation is performed;
  • FIG. 5 is a schematic diagram of a frame structure of a photographing system according to another embodiment of the present application.
  • an embodiment of the present application discloses a method for adjusting the brightness of an LED display screen based on a shooting angle, including:
  • FIG. 1 shows a shooting system to which the solution of this embodiment is applicable, in which the LED display screen 30 is used to display the background picture of the shooting scene, the actor performs in the scene, and the camera 20 shoots the actor's performance picture, wherein the background picture is the LED display screen 30 is displayed.
  • the LED display control device 10 controls the display content and display effect of the LED display screen 30 .
  • the camera 20 can be moved between any positions to obtain the desired image effect.
  • the LED display control device 10 is used as the execution body of the solution of this embodiment to describe the solution of this embodiment. It can be understood that, the solution of this embodiment may also be executed by a photographing system.
  • the center point of the LED display can be used as the origin, and a two-dimensional coordinate system can be established on the horizontal plane.
  • the position data of the camera is the current position of the camera; the shooting angle is the deflection angle of the lens of the camera relative to the camera itself.
  • a gyroscope and a shooting angle sensor may be provided on the camera 20 .
  • the shooting angle sensor can detect the shooting angle and then provide it to the LED display control device 10 .
  • the camera 20 may first be placed in a known initial position, and the LED display control device 10 may record the initial position.
  • the gyroscope can collect the movement data of the camera 20 .
  • the LED display control device 10 can analyze the position change of the camera 20 relative to the initial position by processing and analyzing the movement data in real time, thereby obtaining the current position of the camera 20 as the position data of the camera 20 .
  • Step S100 may specifically include: acquiring the initial position, movement data and shooting angle of the camera; determining the position change of the camera according to the movement data of the camera, and combining the initial position to obtain the position data of the camera.
  • a camera may also be provided, which may capture a live image including the camera 20 .
  • the position data and shooting angle of the camera can be determined by means of image analysis.
  • the camera can be set at the top of the shooting scene to obtain images of the camera 20 and the LED display screen 30 at the same time.
  • the camera can also be arranged on the LED display screen 30 .
  • the picture captured by the camera may only be used to determine the position data of the camera.
  • a shooting angle sensor can also be set at the same time to directly provide a shooting angle.
  • the offset angle may be an angle in a two-dimensional coordinate system, and specifically may be an angle between the shooting direction of the camera 20 and a normal line perpendicular to the LED display screen 30 .
  • the shooting direction of the camera 20 is the direction in which the camera extends along the shooting angle, as shown by the dotted line in FIG. 3 ; the normal line is shown by the solid line in FIG. 3 .
  • the offset angle of the camera relative to the LED display can be calculated.
  • the LED display screen 30 displays red, green, blue and white images
  • Equipment such as a light gun can be used to detect the display brightness of the LED display screen 30 at multiple different offset angles; then the display brightness at the vertical angle is used as the reference brightness, and the reference brightness is multiplied by the ratio value. Get the target brightness value.
  • the ratio value is generally a value less than 1.
  • the vertical angle is the offset angle parallel to the normal line of the display surface of the LED display screen.
  • the driving current of the LED display screen 30 is adjusted so that the display brightness of the LED display screen 30 is the target brightness value.
  • the compensation coefficients required to achieve the target luminance value under different offset angles can be obtained.
  • the luminance supplementary database can be obtained.
  • the LED display control device 10 correspondingly controls the display brightness of the LED display screen according to the matched compensation coefficient to achieve the target brightness value.
  • the offset angle of the sampling and its compensation coefficient can also be fitted into a brightness compensation curve. In this way, during use, any value of the offset angle can directly find the corresponding compensation coefficient from the fitted compensation coefficient curve, without using the compensation coefficients of adjacent offset angles for calculation.
  • compensation coefficients under different offset angles are calculated in advance based on the same target brightness value.
  • the offset of the camera relative to the LED display screen can be calculated in real time Angle, find the corresponding compensation coefficient, so that the LED display screen can have the same display brightness under different offset angles, so that the brightness of the captured picture remains consistent, effectively guaranteeing the shooting effect.
  • the position data of the camera may also be position data in a three-dimensional coordinate system, and may also include height.
  • the offset angle may be an angle in a three-dimensional coordinate system, specifically an angle between the shooting direction of the camera and the normal line perpendicular to the LED display screen 30 .
  • the pre-established brightness compensation database also collects different offset angles in the three-dimensional coordinate system, that is, including different height positions. In this way, the brightness compensation can be made more suitable for the actual offset angle.
  • step S400 may be specifically as follows: according to the shutter times of multiple cameras, within one display period, assign different display time periods to the brightness compensation coefficients corresponding to each camera; Inside, use the corresponding brightness compensation coefficient to control the display brightness of the LED display accordingly. In this way, through the method of time-division multiplexing, it can be ensured that even if there are multiple cameras shooting at different positions at the same time, the brightness of the pictures captured by each camera during the movement process can be kept the same, which ensures the consistency of the shooting effect. with stability.
  • the method for adjusting the brightness of the LED display screen based on the shooting angle can also be used to adjust the chromaticity of the LED display screen.
  • the target chromaticity value may also be preset, and a chromaticity compensation database may be established correspondingly, which includes chromaticity compensation coefficients at different offset angles.
  • the chromaticity compensation system corresponding to Pidu in the chromaticity compensation database can also be obtained according to the offset angle; and then the display chromaticity of the LED display screen can be correspondingly controlled according to the chromaticity compensation coefficient.
  • an LED display control device 10 which is used for the control of an LED display screen for photography, including an offset angle calculation unit 150, a compensation matching unit 300, a display The control unit 400 and the memory 500, the memory 500 stores a pre-established brightness compensation database;
  • the offset angle calculation unit 150 is used to obtain the position data and the shooting angle of the camera, and calculate the offset angle of the camera relative to the LED display screen according to the position data and the shooting angle;
  • the compensation matching unit 300 is configured to match the brightness compensation coefficient corresponding to the offset angle from the brightness compensation database stored in the memory 500 according to the offset angle;
  • the display control unit 400 is used for correspondingly controlling the display brightness of the LED display screen according to the brightness compensation coefficient.
  • the LED display controller provided by the embodiment of the present application calculates the compensation coefficients under different offset angles in advance based on the same target brightness value. The corresponding compensation coefficient is found, so that the LED display screen can have the same display brightness under different offset angles, so that the brightness of the captured picture remains consistent, which effectively guarantees the shooting effect.
  • multiple cameras 20 may be shooting at the same time. Different cameras 20 may have different offset angles, thereby obtaining different luminance compensation coefficients.
  • the display control unit 400 can allocate different display time periods for the brightness compensation coefficients corresponding to each camera in one display period according to the shutter times of multiple cameras; in each display period in one display period , use the corresponding brightness compensation coefficient to control the display brightness of the LED display accordingly. In this way, through the method of time-division multiplexing, it can be ensured that even if there are multiple cameras shooting at different positions at the same time, the brightness of the pictures captured by each camera during the movement process can be kept the same, which ensures the consistency of the shooting effect. with stability.
  • the LED display control device 10 can also be used to adjust the chromaticity of the LED display screen.
  • the target chromaticity value may also be preset, and a chromaticity compensation database may be established correspondingly, which includes chromaticity compensation coefficients at different offset angles.
  • the memory 500 stores a chromaticity compensation database; the compensation matching unit 300 can also obtain the chromaticity compensation system corresponding to Pidu in the chromaticity compensation database according to the offset angle; the display control unit 400 can also, according to the chromaticity compensation coefficient, correspond to Controls the display chromaticity of the LED display.
  • FIG. 1 and FIG. 5 another embodiment of the present application discloses a shooting system, including an LED display control device 10 , an LED display screen 30 and a camera 20 , and the LED display control device 10 controls the display content of the LED display screen 30
  • the camera 20 provides the position data and the shooting angle to the LED display control device 10
  • the LED display control device 10 is the LED display control device described in the previous embodiment, receives the position data and shooting angle of the camera, and calculates the offset of the camera 20. According to the brightness compensation coefficient matched by the offset angle, the display brightness of the LED display screen is correspondingly controlled.
  • the compensation coefficients under different offset angles are calculated in advance.
  • the corresponding offset angle of the camera relative to the LED display screen can be found in real time
  • the compensation coefficient makes the LED display screen have the same display brightness under different offset angles, so that the brightness of the captured picture remains consistent, effectively guaranteeing the shooting effect.
  • the camera 20 is provided with a gyroscope 21 and a shooting angle sensor 22 ; the shooting angle sensor 22 is used to detect the shooting angle of the camera; the gyroscope 21 is used to collect the movement data of the camera 20 , combined with the initial position of the camera 20 , the camera 20 can process and analyze the movement data in real time, so as to analyze the position change of the camera 20 relative to the initial position, and then obtain the current position data of the camera 20 . It can be understood that the movement data collected by the gyroscope 21 can also be directly provided to the LED display control device 10 , and the LED display control device 10 can analyze and obtain the position data of the camera 20 .
  • the photographing system may further include a camera for photographing a scene image including the camera 20 , and by means of image analysis, the position data and photographing angle of the camera may be determined.
  • the camera can be set at the top of the shooting scene to obtain images of the camera 20 and the LED display screen 30 at the same time.
  • the camera can also be arranged on the LED display screen 30 .
  • the shooting system may be provided with multiple cameras, and different cameras 20 may have different offset angles, thereby obtaining different brightness compensation coefficients.
  • the display control unit 400 of the LED display control device 10 can allocate different display time periods for the brightness compensation coefficients corresponding to each camera within a display period according to the shutter times of multiple cameras; During the time period, the corresponding brightness compensation coefficient is used to control the display brightness of the LED display screen accordingly. In this way, through the method of time-division multiplexing, it can be ensured that even if there are multiple cameras shooting at different positions at the same time, the brightness of the pictures captured by each camera during the movement process can be kept the same, which ensures the consistency of the shooting effect. with stability.
  • Another embodiment of the present application further provides a storage medium on which a computer program is stored, wherein the computer program, when executed by a processor, realizes the shooting angle-based LED display screen brightness according to any of the above embodiments adjustment method.
  • the integrated components/modules/units of the system/computer device may be stored in a computer-readable storage medium.
  • the computer-readable storage medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM, Read-Only Memory) ), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media, etc.
  • the content contained in the computer-readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable media Electric carrier signals and telecommunication signals are not included.
  • each functional module/component in each embodiment of this solution may be integrated in the same processing module/component, or each module/component may exist physically alone, or two or more modules/components may be integrated in the same processing module/component. in the module/component.
  • the above-mentioned integrated modules/components may be implemented in the form of hardware, or may be implemented in the form of hardware plus software function modules/components.

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Abstract

一种基于拍摄角度的LED显示屏（30）亮度调节方法、装置及拍摄系统，其中，LED显示屏（30）亮度调节方法包括：获取摄像机（20）的位置数据和拍摄角度（S100）；根据位置数据和拍摄角度，计算摄像机（20）相对于LED显示屏（30）的偏移角度（S200）；根据偏移角度，从预先建立的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数（S300）；根据亮度补偿系数，对应控制LED显示屏（30）的显示亮度（S400）。基于同一个目标亮度值，事先计算了不同偏移角度下的补偿系数，在拍摄过程中，根据摄像机（20）的偏移角度进行实时亮度补偿，使得LED显示屏（30）在不同偏移角度下，也能有相同的显示亮度，从而使得拍摄得到的画面亮度保持一致，有效的保障了拍摄效果。

Description

基于拍摄角度的LED显示屏亮度调节方法及拍摄系统
本申请要求于2021年01月25日在中国专利局提交的、申请号为202110098889.1的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本方案涉及LED显示屏领域，特别是涉及一种基于拍摄角度的LED显示屏亮度调节方法及拍摄系统。
 背景技术
LED显示屏具有色彩鲜艳、亮度高、寿命长、节能等优点，因而被广泛的使用。随着小间距技术的不断发展，LED显示屏可以实现4K/8K超高分辨率以及超高的对比度。也因为此，LED显示屏已经成功进入影视拍摄领域，作为影视拍摄的背景。作为影视拍摄背景的LED显示屏，可以提供真实的光源效果。利用LED显示屏的无缝拼接技术，可以构建出沉浸式画面，让演员可以直观的感受场景中的画面，快速进入角色，并全情投入表演。
但是，现有的LED显示屏，当从不同角度进行观察时，观察到的LED显示屏的发光强度是不一样的。这就导致，当摄像机从一边移动到另一边时，摄像机获取到的画面中，LED显示屏提供的背景画面的亮度是不一样的，这就导致拍摄的画面亮度可能忽明忽暗，比较影响拍摄效果。
 技术问题
基于此，有必要针对现有LED显示屏作为影视拍摄的背景时，从不同角度拍摄的画面存在亮度不一致的问题，提供一种基于拍摄角度的LED显示屏亮度调节方法及拍摄系统。
 技术解决方案
本申请一实施例提供了一种基于拍摄角度的LED显示屏亮度调节方法，包括：
获取摄像机的位置数据和拍摄角度；
根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
根据偏移角度，从预先建立的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
根据亮度补偿系数，对应控制LED显示屏的显示亮度。
在一些实施例中，所述获取摄像机的位置数据和拍摄角度步骤，具体包括：
获取摄像机的初始位置、移动数据和拍摄角度；
根据摄像机的移动数据，确定摄像机的位置变化，结合初始位置，得到摄像机的位置数据。
在一些实施例中，所述摄像机的位置数据，还包括高度；所述偏移角度为三维坐标系下的角度。
在一些实施例中，所述摄像机的数量为多个；所述根据亮度补偿系数，对应控制LED显示屏的显示亮度步骤具体为：
根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；
在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。
在一些实施例中，所述亮度补偿数据库中，采样的偏移角度及其补偿系数拟合成亮度补偿曲线。
本申请另一实施例提供了一种LED显示控制装置，用于拍摄用的LED显示屏的控制，包括偏移角度计算单元、补偿匹配单元、显示控制单元以及存储器，所述存储器上存储有预先建立的亮度补偿数据库；
所述偏移角度计算单元，用于获取摄像机的位置数据和拍摄角度，并根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
所述补偿匹配单元，用于根据偏移角度，从所述存储器中存储的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
所述显示控制单元，用于根据亮度补偿系数，对应控制LED显示屏的显示亮度。
在一些实施例中，所述显示控制单元，具体用于根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。
本申请另一实施例还提供了一种拍摄系统，包括LED显示控制装置、LED显示屏以及摄像机，所述LED显示控制装置控制所述LED显示屏的显示内容以及显示效果，所述摄像机向所述LED显示控制装置提供位置数据和拍摄角度；所述LED显示控制装置为前述任一项实施例所述的LED显示控制装置，接收摄像机的位置数据和拍摄角度，计算摄像机的偏移角度，并根据偏移角度匹配到的亮度补偿系数，对应控制所述LED显示屏的显示亮度。
在一些实施例中，所述摄像机上设置有陀螺仪和拍摄角度传感器；所述拍摄角度传感器，用于检测所述摄像机的拍摄角度；所述陀螺仪用于采集所述摄像机的移动数据；所述摄像机根据存储的初始位置，结合移动数据，确定摄像机的位置数据。
本申请另一实施例还公开了一种存储介质，其上存储有计算机程序，所述计算机程序在由处理器执行时实现前述任一项实施例所述的基于拍摄角度的LED显示屏亮度调节方法。
本申请实施例提供的LED显示屏亮度调节方案，基于同一个目标亮度值，事先计算了不同偏移角度下的补偿系数，在拍摄过程中，可以实时的根据摄像机相对于LED显示屏的偏移角度，查找到对应的补偿系数，使得LED显示屏在不同偏移角度下，也能有相同的显示亮度，从而使得拍摄得到的画面亮度保持一致，有效的保障了拍摄效果。
 附图说明
图1为本申请一实施例的拍摄系统的框架结构示意图；
图2为本申请一实施例的基于拍摄角度的LED显示屏亮度调节方法的流程示意图；
图3为本申请一实施例中摄像机相对于LED显示屏的偏移角度的示意图；
图4为未进行亮度补偿时不同偏移角度下LED显示屏的显示亮度变化示意图；
图5为本申请另一实施例的拍摄系统的框架结构示意图。
 本发明的实施方式
为了能够更清楚地理解本方案的上述目的、特征和优点，下面结合附图和具体实施方式对本方案进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式及实施方式中的特征可以相互组合。
除非另有定义，本文所使用的所有的技术和科学术语与属于本方案的技术领域的技术人员通常理解的含义相同。本文中在本方案的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本方案。
如图2所示，本申请一实施例公开了一种基于拍摄角度的LED显示屏亮度调节方法，包括：
S100，获取摄像机的位置数据和拍摄角度；
图1示出了本实施例方案适用的拍摄系统，其中，LED显示屏30用于显示拍摄场景的背景画面，演员在场景内进行表演，摄像机20拍摄演员的表演画面，其中背景画面就是LED显示屏30显示的画面。LED显示控制装置10，控制LED显示屏30的显示内容以及显示效果。如图3所示，根据拍摄需要，摄像机20可以在任意位置之间进行移动，以获取到想要拍摄的画面效果。
下面以LED显示控制装置10，作为本实施例方案的执行主体，来对本实施例方案进行说明。可以理解的是，本实施例方案，也可以由拍摄系统来执行。
可以LED显示屏的中心点为原点，在水平面上，建立一个二维坐标系。摄像机的位置数据，就是摄像机的当前位置；拍摄角度，就是摄像机的镜头相对摄像机自身的偏转角度。
示例的，可以在摄像机20上设置陀螺仪和拍摄角度传感器。拍摄角度传感器，可以检测到拍摄角度，然后提供给LED显示控制装置10。
摄像机20可以首先放置在一个已知的初始位置，LED显示控制装置10可以记录该初始位置。在拍摄过程中，移动摄像机20时，陀螺仪可以采集到摄像机20的移动数据。LED显示控制装置10，通过实时的对移动数据进行处理与分析，即可分析出摄像机20相对于初始位置的位置变化，进而得到摄像机20的当前位置，作为摄像机20的位置数据。
步骤S100，可以具体为：获取摄像机的初始位置、移动数据和拍摄角度；根据摄像机的移动数据，确定摄像机的位置变化，结合初始位置，得到摄像机的位置数据。
示例的，LED显示系统中，也可以设置一个摄像头，可以拍摄包含摄像机20的现场图像。可以通过图像分析的方式，确定摄像机的位置数据和拍摄角度。
摄像头可以设置在拍摄场景的顶部，以同时获取到摄像机20和LED显示屏30的图像。摄像头也可以设置在LED显示屏30上。
可以理解的是，对摄像头拍摄到的图片，可以仅用于确定摄像机的位置数据。在摄像机20上，也可以同时设置拍摄角度传感器，以直接提供拍摄角度。
S200，根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
示例的，偏移角度，可以是二维坐标系下的角度，具体可以是摄像机20的拍摄方向与垂直于LED显示屏30的法线之间的夹角。摄像机20的拍摄方向就是摄像机沿着拍摄角度延伸的方向，如图3中虚线所示；法线如图3中的实线所示。如图3所示，根据位置数据和拍摄角度，可以计算出摄像机相对于LED显示屏的偏移角度。
S300，根据偏移角度，从预先建立的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
S400，根据亮度补偿系数，对应控制LED显示屏的显示亮度。
如图4所示，在不同偏移角度下，LED显示屏30显示红色、绿色、蓝色以及白色的画面时，具有明显可以察觉到的亮度差异。可以使用光枪等设备，在多个不同的偏移角度下，对LED显示屏30的显示亮度进行检测；然后以垂直角度的显示亮度为基准亮度，将基准亮度与比例值相乘，即可得到目标亮度值。比例值一般为小于1的数值。垂直角度即为与LED显示屏的显示面的法线平行的偏移角度。然后调整LED显示屏30的驱动电流，以使LED显示屏30的显示亮度为目标亮度值。如此，即可得到不同偏移角度下，为达到目标亮度值所需要的补偿系数。汇总所有偏移角度下的补偿系数，即可得到亮度补充数据库。
在实际拍摄时，当得到摄像机20的相对于LED显示屏的偏移角度之后，即可从亮度补充数据库中进行匹配，得到对应的补偿系数。LED显示控制装置10，根据匹配到的补偿系数，对应控制LED显示屏的显示亮度，达到目标亮度值。
可以理解的是，在事先建立亮度补充数据库时，也可以将采样的偏移角度及其补偿系数拟合成亮度补偿曲线。如此，在使用过程中，偏移角度的任意数值，均可以直接从拟合的补偿系数曲线中找到对应的补偿系数，而无需再利用相邻偏移角度的补偿系数进行计算。
本申请实施例提供的LED显示屏亮度调节方法，基于同一个目标亮度值，事先计算了不同偏移角度下的补偿系数，在拍摄过程中，可以实时的根据摄像机相对于LED显示屏的偏移角度，查找到对应的补偿系数，使得LED显示屏在不同偏移角度下，也能有相同的显示亮度，从而使得拍摄得到的画面亮度保持一致，有效的保障了拍摄效果。
在一些实施例中，步骤S100中，摄像机的位置数据，也可以为三维坐标系下的位置数据，还可以包括高度。步骤S200中，偏移角度可以为三维坐标系下的角度，具体为摄像机的拍摄方向与垂直于LED显示屏30的法线之间的夹角。相应的，预先建立的亮度补偿数据库，也会采集三维坐标系下的不同偏移角度，也就是包括不同高度位置。如此，可以使得亮度补偿更加贴合实际的偏移角度。
在一些实施例中，可能会有多个摄像机20同时在拍摄，不同的摄像机20可能会有不同的偏移角度，进而得到不同的亮度补偿系数。此时，步骤S400，可以具体为：根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。如此，通过分时复用的方式，可以保证，即使有多个摄像机同时在不同位置进行拍摄，也可以让每个摄像机在移动过程中拍摄到的画面亮度均保持一致，保障了拍摄效果的一致与稳定。
在一些实施例中，所述基于拍摄角度的LED显示屏亮度调节方法，还可以用于LED显示屏色度的调节。示例的，与亮度补偿数据库相似的，也可以预先设置目标色度值，对应建立色度补偿数据库，其中包括有不同偏移角度下的色度补偿系数。在步骤S300及S400中，还可以根据偏移角度，从色度补偿数据库中皮杜对应的色度补偿系统；然后根据色度补偿系数，对应控制LED显示屏的显示色度。
如图1及图5所示，本申请另一实施例公开了一种LED显示控制装置10，用于拍摄用的LED显示屏的控制，包括偏移角度计算单元150、补偿匹配单元300、显示控制单元400以及存储器500，存储器500上存储有预先建立的亮度补偿数据库；
偏移角度计算单元150，用于获取摄像机的位置数据和拍摄角度，并根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
补偿匹配单元300，用于根据偏移角度，从存储器500中存储的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
显示控制单元400，用于根据亮度补偿系数，对应控制LED显示屏的显示亮度。
偏移角度计算单元150、补偿匹配单元300、显示控制单元400的工作方式，可以参见前面方法实施例中步骤S100-S400的描述，在此不再赘述。
本申请实施例提供的LED显示控制器，基于同一个目标亮度值，事先计算了不同偏移角度下的补偿系数，在拍摄过程中，可以实时的根据摄像机相对于LED显示屏的偏移角度，查找到对应的补偿系数，使得LED显示屏在不同偏移角度下，也能有相同的显示亮度，从而使得拍摄得到的画面亮度保持一致，有效的保障了拍摄效果。
在一些实施例中，可能会有多个摄像机20同时在拍摄。不同的摄像机20可能会有不同的偏移角度，进而得到不同的亮度补偿系数。此时，显示控制单元400，可以根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。如此，通过分时复用的方式，可以保证，即使有多个摄像机同时在不同位置进行拍摄，也可以让每个摄像机在移动过程中拍摄到的画面亮度均保持一致，保障了拍摄效果的一致与稳定。
在一些实施例中，所述LED显示控制装置10，还可以用于LED显示屏色度的调节。示例的，与亮度补偿数据库相似的，也可以预先设置目标色度值，对应建立色度补偿数据库，其中包括有不同偏移角度下的色度补偿系数。存储器500上存储有色度补偿数据库；补偿匹配单元300，还可以根据偏移角度，从色度补偿数据库中皮杜对应的色度补偿系统；显示控制单元400，还可以根据色度补偿系数，对应控制LED显示屏的显示色度。
如图1及图5所示，本申请另一实施例公开了一种拍摄系统，包括LED显示控制装置10、LED显示屏30以及摄像机20，LED显示控制装置10控制LED显示屏30的显示内容以及显示效果，摄像机20向LED显示控制装置10提供位置数据和拍摄角度；LED显示控制装置10为前面实施例所述的LED显示控制装置，接收摄像机的位置数据和拍摄角度，计算摄像机20的偏移角度，并根据偏移角度匹配到的亮度补偿系数，对应控制LED显示屏的显示亮度。
本申请实施例的拍摄系统，基于同一个目标亮度值，事先计算了不同偏移角度下的补偿系数，在拍摄过程中，可以实时的根据摄像机相对于LED显示屏的偏移角度，查找到对应的补偿系数，使得LED显示屏在不同偏移角度下，也能有相同的显示亮度，从而使得拍摄得到的画面亮度保持一致，有效的保障了拍摄效果。
在一些实施例中，如图5所示，摄像机20上设置有陀螺仪21和拍摄角度传感器22；拍摄角度传感器22，用于检测摄像机的拍摄角度；陀螺仪21用于采集摄像机20的移动数据，结合摄像机20的初始位置，摄像机20可以通过实时的对移动数据进行处理与分析，即可分析出摄像机20相对于初始位置的位置变化，进而得到摄像机20的当前位置数据。可以理解的是，陀螺仪21采集到的移动数据，也可以直接提供给LED显示控制装置10，由LED显示控制装置10来分析得到摄像机20的位置数据。
在一些实施例中，拍摄系统还可以包括摄像头，用于拍摄包含摄像机20的现场图像，通过图像分析的方式，可以确定摄像机的位置数据和拍摄角度。摄像头可以设置在拍摄场景的顶部，以同时获取到摄像机20和LED显示屏30的图像。摄像头也可以设置在LED显示屏30上。
在一些实施例中，拍摄系统可以设置有多个摄像头，不同的摄像机20可能会有不同的偏移角度，进而得到不同的亮度补偿系数。LED显示控制装置10的显示控制单元400，可以根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。如此，通过分时复用的方式，可以保证，即使有多个摄像机同时在不同位置进行拍摄，也可以让每个摄像机在移动过程中拍摄到的画面亮度均保持一致，保障了拍摄效果的一致与稳定。
本申请另一实施例还提供了一种存储介质，其上存储有计算机程序，其中所述计算机程序在由处理器执行时实现上述任一项实施例所述的基于拍摄角度的LED显示屏亮度调节方法。
所述系统/计算机装置集成的部件/模块/单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。所述计算机可读存储介质可以包括：能够携带所述计算机程序代码的任何实体或装置、记录介质、U盘、移动硬盘、磁碟、光盘、计算机存储器、只读存储器 (ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、电载波信号、电信信号以及软件分发介质等。需要说明的是，所述计算机可读介质包含的内容可以根据司法管辖区内立法和专利实践的要求进行适当的增减，例如在某些司法管辖区，根据立法和专利实践，计算机可读介质不包括电载波信号和电信信号。
在本方案所提供的几个具体实施方式中，应该理解到，所揭露的系统和方法，可以通过其它的方式实现。例如，以上所描述的系统实施方式仅仅是示意性的，例如，所述部件的划分，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。
另外，在本方案各个实施例中的各功能模块/部件可以集成在相同处理模块/部件中，也可以是各个模块/部件单独物理存在，也可以两个或两个以上模块/部件集成在相同模块/部件中。上述集成的模块/部件既可以采用硬件的形式实现，也可以采用硬件加软件功能模块/部件的形式实现。
对于本领域技术人员而言，显然本方案实施例不限于上述示范性实施例的细节，而且在不背离本方案实施例的精神或基本特征的情况下，能够以其他的具体形式实现本方案实施例。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本方案实施例的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本方案实施例内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。此外，显然“包括”一词不排除其他单元或步骤，单数不排除复数。系统、装置或终端权利要求中陈述的多个单元、模块或装置也可以由同一个单元、模块或装置通过软件或者硬件来实现。第一，第二等词语用来表示名称，而并不表示任何特定的顺序。
以上所述实施例仅表达了本方案的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本方案构思的前提下，还可以做出若干变形和改进，这些都属于本方案的保护范围。因此，本方案专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种基于拍摄角度的LED显示屏亮度调节方法，其特征在于，包括：
    获取摄像机的位置数据和拍摄角度；
    根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
    根据偏移角度，从预先建立的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
    根据亮度补偿系数，对应控制LED显示屏的显示亮度。
  2. 根据权利要求1所述的LED显示屏亮度调节方法，其特征在于，所述获取摄像机的位置数据和拍摄角度步骤，具体包括：
    获取摄像机的初始位置、移动数据和拍摄角度；
    根据摄像机的移动数据，确定摄像机的位置变化，结合初始位置，得到摄像机的位置数据。
  3. 根据权利要求1所述的LED显示屏亮度调节方法，其特征在于，所述摄像机的位置数据，还包括高度；所述偏移角度为三维坐标系下的角度。
  4. 根据权利要求1所述的LED显示屏亮度调节方法，其特征在于，所述摄像机的数量为多个；所述根据亮度补偿系数，对应控制LED显示屏的显示亮度步骤具体为：
    根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；
    在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。
  5. 根据权利要求1所述的LED显示屏亮度调节方法，其特征在于，所述亮度补偿数据库中，采样的偏移角度及其补偿系数拟合成亮度补偿曲线。
  6. 一种LED显示控制装置，用于拍摄用的LED显示屏的控制，其特征在于，包括偏移角度计算单元、补偿匹配单元、显示控制单元以及存储器，所述存储器上存储有预先建立的亮度补偿数据库；
    所述偏移角度计算单元，用于获取摄像机的位置数据和拍摄角度，并根据位置数据和拍摄角度，计算摄像机相对于LED显示屏的偏移角度；
    所述补偿匹配单元，用于根据偏移角度，从所述存储器中存储的亮度补偿数据库中，匹配对应偏移角度的亮度补偿系数；
    所述显示控制单元，用于根据亮度补偿系数，对应控制LED显示屏的显示亮度。
  7. 根据权利要求6所述的LED显示控制装置，其特征在于，所述显示控制单元，具体用于根据多个摄像机的快门时间，在一个显示周期内，为每个摄像机对应的亮度补偿系数分配不同的显示时间段；在一个显示周期内的各个显示时间段内，使用对应的亮度补偿系数，对应控制LED显示屏的显示亮度。
  8. 一种拍摄系统，其特征在于，包括LED显示控制装置、LED显示屏以及摄像机，所述LED显示控制装置控制所述LED显示屏的显示内容以及显示效果，所述摄像机向所述LED显示控制装置提供位置数据和拍摄角度；所述LED显示控制装置为权利要求6-7任一项所述的LED显示控制装置，接收摄像机的位置数据和拍摄角度，计算摄像机的偏移角度，并根据偏移角度匹配到的亮度补偿系数，对应控制所述LED显示屏的显示亮度。
  9. 根据权利要求8所述的拍摄系统，其特征在于，所述摄像机上设置有陀螺仪和拍摄角度传感器；所述拍摄角度传感器，用于检测所述摄像机的拍摄角度；所述陀螺仪用于采集所述摄像机的移动数据；所述摄像机根据存储的初始位置，结合移动数据，确定摄像机的位置数据。
  10. 一种存储介质，其上存储有计算机程序，其特征在于，所述计算机程序在由处理器执行时实现权利要求1-5任一项所述的基于拍摄角度的LED显示屏亮度调节方法。
PCT/CN2022/073013 2021-01-25 2022-01-20 基于拍摄角度的led显示屏亮度调节方法及拍摄系统 WO2022156748A1 (zh)

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