Ambient light configuration system and method in a home viewing environment

Abstract

The application discloses a kind of ambient light configuration system and method under the environment of family viewing, belong to the field of film and television.The system of the application includes HDR camera brightness calibration system, ambient light source setting system, ambient light source calibration system, real-time ambient light control system, ambient light configuration self-checking system.According to HDR camera calibration data and ambient light source calibration data, the average brightness and red-blue ratio of display picture obtained by HDR camera are calculated in real time by real-time ambient light control system, and the color temperature and brightness driving value of each ambient light source are output, and the light source driving module of real-time ambient light control system controls ambient light source to emit light according to color temperature and brightness driving value.According to display content, the illumination and brightness of ambient light source are adjusted in real time, the comfort of watching movie is improved, and the viewing experience of viewer is improved.The application is suitable for the field of film and television, and the discomfort caused by watching HDR image is relieved through the configuration of ambient light, and the immersion experience of audience is enhanced.

Description

Technical Field

[0001] This invention relates to an ambient light configuration system and method for home viewing environments, belonging to the field of film and television. Technical Background

[0002] With the development of display technology, new HDR (High Dynamic Range) image display devices, represented by LED displays, are showing a trend of replacing traditional projection display devices due to their superior characteristics such as high brightness, high dynamic range, and wide color gamut, becoming the mainstream display devices for HDR images in the future. However, existing research shows that watching high-brightness HDR images in a dark environment can easily increase the burden on the human eye, causing viewers to experience headaches, nausea, and visual fatigue such as dry and itchy eyes. Based on the brightness adaptation characteristics of human vision, providing appropriate ambient lighting in the viewing environment of HDR images can alleviate the above-mentioned visual discomfort to a certain extent and improve the viewing experience. If the ambient light color temperature and brightness are changed in conjunction with the displayed content, it can also assist in the expression of the film content, enhance the viewing atmosphere, and increase the viewer's immersion in the film. Summary of the Invention

[0003] To address the issue of viewers experiencing discomfort when watching HDR images in dark environments, the main objective of this invention is to provide an ambient light configuration system and method for home viewing environments. By configuring ambient light, this system can alleviate discomfort caused by watching HDR images and enhance the viewer's immersive experience.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] This invention discloses an ambient light configuration system for home viewing environments, comprising an HDR camera brightness calibration system, an ambient light source setting system, an ambient light source calibration system, a real-time ambient light control system, and an ambient light configuration self-test system. The HDR camera brightness calibration system calibrates the correspondence between the output code value of the HDR acquired display image and the actual display brightness, and transmits the calibration data to the real-time ambient light control system. The ambient light source setting system, based on measurement data of the actual viewing environment and the actual screen size, provides a spatial configuration scheme for the display screen and seats in the viewing environment, as well as an ambient light source configuration scheme, and transmits the configuration scheme to the ambient light source calibration system. The ambient light source calibration system calibrates the illuminance of ambient light sources at different locations at the viewing center, forming calibration data that is transmitted to the real-time ambient light control system. The real-time ambient light control system performs real-time light source control based on the display content captured in real-time by the HDR camera, the calibration values ​​of the HDR camera brightness calibration system, and the calibration values ​​of the ambient light source calibration system. The ambient light configuration self-test system transmits the system feedback operation results to the real-time ambient light control system.

[0006] The ambient light source setting system is used to output the spatial position configuration scheme of the display screen and seats and the configuration scheme of the ambient light source in the viewing environment based on the measurement data of the actual viewing environment and the actual size of the display screen, and to simulate and debug the ambient light source configuration scheme in the 3D modeling software.

[0007] The ambient light source calibration system is used to calibrate the illuminance of each ambient light source at the sampling color temperature and brightness values ​​at the center of the viewing environment, and transmit the calibration data to the real-time ambient light control system. The center is the midpoint of the line segment connecting the observer's eyes.

[0008] The real-time ambient light control system is used to control the ambient light setting system to configure the color temperature and brightness of each ambient light source according to calibration data and the content of the displayed screen. It consists of a real-time calculation module for the average brightness and red-blue ratio of the displayed screen, an ambient light source color temperature and brightness configuration module, and a light source driving module.

[0009] The real-time calculation module for average brightness and red-blue ratio of the display screen calculates the average brightness and red-blue ratio of the display screen obtained by the HDR camera in real time and transmits it to the ambient light color temperature and brightness configuration module.

[0010] The ambient light source color temperature and brightness configuration module transmits the color temperature and brightness parameters of each ambient light source to the light source driver module in real time based on the average brightness and red-blue ratio of the displayed screen.

[0011] The light source driving module is used to drive the light source to emit light.

[0012] The ambient light configuration self-test system feeds back the operating results to the real-time ambient light control system, and includes an error calculation module and a log generation module.

[0013] The error calculation module is used to calculate the error between the actual color temperature of the ambient light source and the color temperature of the ambient light source configured by the real-time ambient light control system, as well as the error between the actual illuminance of the ambient light source and the illuminance configured by the real-time ambient light control system, and to provide feedback values.

[0014] The log generation module is used to record the running time of this ambient light self-test, the ambient light source color temperature and illuminance values ​​generated by the real-time ambient light control system, the measured values ​​of the ambient light source color temperature and illuminance, and the data generated by the error calculation module.

[0015] This invention discloses an ambient light configuration method for a home viewing environment, implemented based on an ambient light configuration system for a home viewing environment, comprising the following steps:

[0016] Step 1: Measure the actual viewing environment and locate and install the display screen and ambient light source;

[0017] 1.1 Setting the display screen position

[0018] The midpoint of the line segment connecting the observer's eyes is O′, the intersection of the line perpendicular to the ground through O′ and the ground is O, and the distance between O and O′ is e, i.e.

[0019] |OO′|=e

[0020] Here, |·| represents length. The intersection of the straight line passing through point O′ and parallel to the ground with the display screen is O″, and the distance between O′ and O″ is d, i.e.

[0021] |O′O″|=d

[0022] Establish a right-handed rectangular coordinate system Oxyz with point O as the center. The y-axis is perpendicular to the ground and points upwards from the ground, while the x-axis is parallel to OO′ and points upwards from the screen.

[0023] The display screen has a width of w, a height of h, and a diagonal length of c. Adjust d such that d satisfies:

[0024]

[0025] Where θ is the semi-horizontal viewpoint and ε is the semi-vertical viewpoint.

[0026] The semi-horizontal viewpoint is on a plane that passes through the straight line O′O″ and is parallel to the ground, where O′ is the vertex of the semi-horizontal viewpoint and the straight line O′O″ is the angle formed by one of its sides.

[0027] The semi-vertical angle is on a plane that passes through the straight line O′O″ and is perpendicular to the ground, where O′ is the vertex of the semi-vertical angle and the straight line O′O″ is the angle formed by one of its sides.

[0028] The bottom edge of the display screen is at a height v relative to the ground:

[0029]

[0030] Where h v h represents the average seat height of the audience, which is the distance from the seat surface to the top of the audience's head when they are seated. s This refers to the distance from the seat surface to the ground.

[0031] 1.2 Setting the location of ambient light sources

[0032] Three ambient light sources are placed in area C above the observer's head and in areas A and B on either side, extending 180 degrees beyond the observer's horizontal viewing angle. The illumination areas of these three ambient light sources (A, B, and C) are controlled by light shields, ensuring that the light-covered areas form the background area of ​​the film, but do not include the core viewing area.

[0033] The core viewing area is a display screen with a width of w and a height of h.

[0034] Viewing background area: with O′O″ as the axis, the area corresponding to the left horizontal field of view interval [θ,θ′] and the corresponding area to the right horizontal field of view interval symmetrically thereto, the area corresponding to the upper half vertical field of view interval [ε,ε′], and the area corresponding to the lower half vertical field of view interval [ε,ε″].

[0035] Step 2: Perform brightness calibration on the HDR camera and transmit the calibration data file to the real-time ambient light control system;

[0036] 2.1 Divide the display device screen into 9 zones, set the display screen mode, and input test sequences with different brightness and color values. Place a spectrophotometer and camera at the center of the viewing area. Measure the brightness values ​​of the 9 zones of the display device in this mode and calculate the average value. The camera simultaneously records the test sequence displayed on the screen, ensuring that the recorded image does not extend beyond the display device screen.

[0037] 2.2. Based on the measurement and calculation results in 2.1 and the HDR camera brightness calibration algorithm, the brightness of the HDR camera is calibrated, the correspondence between the monitoring camera code value and the brightness is established, a calibration lookup table is formed, and the table is transmitted to the real-time ambient light control system.

[0038] Step 3: Calibrate the color temperature, brightness and illuminance of the ambient light source installed in Step 1, form an illuminance matrix, and transmit it to the real-time ambient light control system.

[0039] Ambient light source calibration mainly calibrates the relationship between the color mixing code value of the ambient light source and its illuminance and color temperature. In the actual viewing environment, an illuminance meter is placed at the center of the viewing area, position O′; different color temperatures and luminances at points A, B, and C, and the illuminance at point O′ are calibrated.

[0040] The light source at point A is S. A The light source at point B is S. B The light source at point C is S. C The color temperature range for the three light sources is [CT]. I CT E [, in K; power percentage is [0, 100%].

[0041] The color temperature step size is Cs, and the power step size is Ls (Ls < 1). For color temperature CT... I +(i-1)*Cs, set the light source S A The power ratio is j*Ls, where i and j are integers, and i∈[1,m], j∈[1,n].

[0042]

[0043]

[0044] ceiling(·) indicates rounding up.

[0045] Repeat the measurement of illuminance at point O′ N times. The unit is lux. Its arithmetic mean is the light source S. A Illuminance M at point O′ under the current color temperature and brightness ij :

[0046]

[0047] Light source S A The illuminance matrix is:

[0048]

[0049] M ij Corresponding to color temperature CT I +(i-1)*Cs, when the power percentage of the light source S is j*Ls A Illuminance at O′.

[0050] Repeat step 3 of the calibration process to obtain the light source S. B S C The corresponding illumination matrix M B M C .

[0051] Step 4: The real-time ambient light control system calculates the color temperature and brightness parameters of each ambient light source based on the screen display sampling data obtained by the HDR camera and generates light source driving values. The system then controls the ambient light sources to emit light based on the driving values.

[0052] 4.1 The display screen monitoring camera samples the display screen content using continuous sampling, equal time interval sampling, or frame interval sampling. The monitoring data is transmitted to the ambient light control system in real time. The average brightness calculation module calculates the average brightness of the sampled display image in real time according to the calibration lookup table in step 2.2. Simultaneously calculate the average red-to-blue ratio T of the displayed image. rb This information is then passed to the ambient light driver module.

[0053] The screen image data acquired by the screen monitoring camera at time t is I, where I = (I ijk ) is a three-dimensional matrix of h×w×3.

[0054] 4.1.1 Average brightness of the sampled display image The unit is cd / m 2 It is obtained by the following method:

[0055]

[0056]

[0057]

[0058] By using a lookup table of camera code values ​​and brightness, and through interpolation methods, the following calculations are performed. Corresponding average brightness

[0059] 4.1.2 Average red-blue ratio T of the displayed image rb Obtained by the following method:

[0060]

[0061] 4.2. Based on the sampled average brightness transmitted by the display average brightness calculation module. and the average red-blue ratio T of the displayed image rb Determine the ambient light color temperature (CT) and illuminance (M) at location O′, and calculate the ambient light source S. A S B S C Power percentage L A L B L C Then the parameters (CT, L) A L B L C The ambient light color temperature and brightness configuration modules transmit the ambient light source parameters (CT, M) to the light source driver module. When entering the ambient light self-test mode, the ambient light color temperature and brightness configuration modules transmit the ambient light source parameters (CT, M) to the error calculation module of the ambient light self-test system.

[0062] The calculation methods for ambient light source color temperature and brightness are as follows:

[0063] 4.2.1 The ambient light source color temperature CT is obtained as follows:

[0064] If T rb >W CT ,

[0065]

[0066] If T rb <C CT ,

[0067]

[0068] If C CT ≤T rb ≤W CT

[0069] CT=T p .

[0070] Among them W CT CCT Given a red-to-blue ratio threshold parameter, and W CT >1.2, C CT <0.8, I(x) means setting the value of x after the hundreds place to 0, for example: I(1754.32) = 1700. T p T min T max Given a color temperature parameter, which is related to the chromaticity of the viewing environment wall, and T min ≤T p ≤T max .

[0071] 4.2.2 The ambient illuminance M at point O′ is calculated using the following formula:

[0072]

[0073] Here, log(·) is a logarithmic function with base 10.

[0074] 4.2.3 Ambient Light Source S A S B S C Light source brightness parameter L A L B L C Calculated in the following ways:

[0075]

[0076] m A m B m C S is the ambient light source at point O′. A S B S C Illuminance:

[0077] m B =M×μ

[0078]

[0079]

[0080] μ is the illuminance distribution parameter of the light source, which satisfies:

[0081] if μ = 1; otherwise μ < 1, here Ambient light source B at color temperature CT I +i C *Cs, Illuminance of the viewing center at 50% power.

[0082] Pick

[0083]

[0084] like

[0085]

[0086] otherwise

[0087]

[0088]

[0089] Here, k = A, B, C.

[0090] 4.3. Based on the color temperature and luminance parameters of the light source (CT, L) A L B L C Drive ambient light sources. Each light source S A S B S C The corresponding driving parameters are: (CT, L) A ), (CT, L B ), (CT, L C ).

[0091] Step 5: The ambient light configuration self-test system provides feedback on the ambient light configuration results. Based on the feedback log, the real-time environmental control system corrects the ambient light source setting system to alleviate discomfort caused by watching HDR images and enhance the audience's immersive experience.

[0092] Different brightness, monochrome detection sequence frames are output to the display screen. The ambient light source is driven by the real-time light environment control system, and the illuminance M of the ambient light source at point O' is measured using a lux meter. m and color temperature CT m The measurement results are then passed to the error calculation module and the log generation module.

[0093] The error calculation module calculates the error E between the actual and theoretical values ​​of the ambient color temperature and illuminance in the detection sequence frame based on the data set and the theoretical ambient light source color temperature CT and illuminance parameters M transmitted by the ambient light source color temperature and luminance configuration module. CT E M The error is passed to the log generation module. If the error value is within the given error range, the feedback value F is 0, indicating that the color temperature and illuminance are normal; if it exceeds the given error range, the feedback value F is: 1 - only the color temperature exceeds the error range, 2 - only the illuminance exceeds the error range, 3 - both the color temperature and illuminance exceed the error range and are passed to the log generation module. Color temperature error E CT and illuminance error E M Obtained in the following ways:

[0094] E CT=abs(CT-CT) m )

[0095]

[0096] Where abs(·) is the absolute value function.

[0097] Feedback value F:

[0098]

[0099] Among them Th CT ,Th M For a given color temperature and illuminance tolerance value.

[0100] Beneficial effects

[0101] 1. This invention discloses an ambient light configuration system and method for home viewing environments. It involves spatial physical measurement of the actual viewing environment, simulation configuration of the display screen and ambient light sources in 3D software, and then actual positioning and installation of the light sources based on the spatial arrangement of the ambient light sources in the 3D modeling software. The system has low hardware requirements, is easy to adjust, and can create a comfortable visual environment for different viewing needs at a low cost.

[0102] 2. This invention discloses an ambient light configuration system and method for home viewing environments. A real-time ambient light control system includes a module for calculating the average brightness and red-blue ratio of the displayed image in real time, based on HDR camera calibration data and ambient light source calibration data. The module calculates and outputs the color temperature and brightness driving values ​​for each ambient light source based on the average brightness and red-blue ratio. The light source driving module of the real-time ambient light control system then controls the ambient light sources to emit light according to these color temperature and brightness driving values. This system can adjust the illuminance and brightness of the ambient light sources in real time according to the displayed content, improving viewing comfort and enhancing the viewer's experience. Attached Figure Description

[0103] Figure 1 This is a schematic diagram of an ambient light configuration system for a home viewing environment disclosed in this invention;

[0104] Figure 2 This is a flowchart of an ambient light configuration method for a home viewing environment disclosed in this invention;

[0105] Figure 3 This is a schematic diagram showing the position of the display device and the position of the light source in three-dimensional space.

[0106] Figure 4 This diagram illustrates the core viewing area and the background area. Detailed Implementation

[0107] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical problems solved by the present invention and its beneficial effects are also described. It should be noted that the described embodiments are only intended to facilitate understanding of the present invention and do not constitute any limitation thereof.

[0108] This embodiment discloses an ambient light configuration system and method for a home viewing environment, applicable to a space measuring 240 cm long, 220 cm wide, and 300 cm high, with the surrounding area covered by a black, low-reflectivity cloth. The display screen measures 144 cm wide and 82 cm high, with a peak white point brightness of 1000 nits. Figure 2 As shown, it includes the following steps:

[0109] Step 1: Measure the actual viewing environment and locate and install the display screen and ambient light source;

[0110] (1) Set the display screen position

[0111] According to cinema seating standards, the height of the viewing seat is 40cm, and the average sitting height of Asians is 80cm. Therefore, the coordinates of the viewing center are (0,120,0).

[0112] Let O′ be the midpoint of the line segment connecting the observer's eyes, and let O be the intersection of the line perpendicular to the ground passing through O′ and the ground. Let e ​​be the distance between O and O′.

[0113] |OO′|=e

[0114] Here, |·| represents length. The intersection of the straight line passing through point O′ and parallel to the ground with the display screen is O″, and the distance between O′ and O″ is d, i.e.

[0115] |O′O″|=d

[0116] Establish a right-handed rectangular coordinate system Oxyz with point O as the center. The y-axis is perpendicular to the ground and points upwards from the ground, while the x-axis is parallel to OO′ and points upwards from the screen.

[0117] The display screen has a width of w, a height of h, and a diagonal length of c. Adjust d such that d satisfies:

[0118]

[0119] Where θ is the semi-horizontal viewpoint and ε is the semi-vertical viewpoint.

[0120] The semi-horizontal viewpoint is on a plane that passes through the straight line O′O″ and is parallel to the ground, where O′ is the vertex of the semi-horizontal viewpoint and the straight line O′O″ is the angle formed by one of its sides.

[0121] The semi-vertical angle is on a plane that passes through the straight line O′O″ and is perpendicular to the ground, where O′ is the vertex of the semi-vertical angle and the straight line O′O″ is the angle formed by one of its sides.

[0122] Based on the experimental environment space size and screen size, substitute θ = 17.5° and ε = 15° into the equation.

[0123]

[0124] We can obtain d = max{228, 153} = 228cm

[0125] The bottom edge of the display screen, at a height v relative to the ground, satisfies the following:

[0126]

[0127] Install a display screen with its center located at the horizontal center of a 220 cm wide wall, the center of the viewing environment located at a distance of 228-230 cm from the screen, and the bottom edge of the screen 69 cm from the ground.

[0128] (2) Setting the position of ambient light source

[0129] Three ambient light sources are placed in area C directly above the observer's head, and in areas A and B extending 180 degrees beyond the observer's horizontal viewing angle. The illumination areas of these three ambient light sources (A, B, and C) are controlled by a light shield, ensuring that the area covered by the light sources constitutes the background area of ​​the film, but excludes the core viewing area. The definitions of the core viewing area and the background viewing area are as follows:

[0130] The core viewing area is a display screen with a width of w and a height of h.

[0131] Viewing background area: with O′O″ as the axis, the area corresponding to the left horizontal field of view interval [θ,θ′] and the corresponding area to the right horizontal field of view interval symmetrically thereto, the area corresponding to the upper half vertical field of view interval [ε,ε′], and the area corresponding to the lower half vertical field of view interval [ε,ε″].

[0132] The spatial coordinates of the three ambient light sources are C:(0,300,0), B:(0,300,110), and A:(0,300,-110) (unit: cm). The positions of the display screen and the light sources are shown in the figure. The illumination areas of the three ambient light sources A, B, and C are controlled by a light shield, so that the light source coverage area is the background area of ​​the viewing area, but does not include the core viewing area, where θ′=30°, ε′=25°, and ε′=30°, as shown in the figure.

[0133] Step 2: Perform brightness calibration on the HDR camera and transmit the calibration data file to the real-time ambient light control system;

[0134] 2.1 The display screen (device) receives RGB images with a bit depth of 10. A monochrome test sequence is generated, with the following code values:

[0135]

[0136]

[0137] There are a total of 9×9×9=729 test sequences.

[0138] 2.2 Divide the display device screen into 9 zones, input the test sequence, and set up a spectrophotometer and camera in the center of the viewing area; display the brightness values ​​of the 9 zones when the device displays each test frame, and calculate the average value;

[0139] 2.3. Based on the test sequence code value The corresponding HDR camera captures the sequence code value of this test sequence. And the average brightness value l obtained by measurement and calculation i (where i is the sequence frame number, 1≤i≤729), that is

[0140]

[0141] Select a suitable HDR camera brightness calibration algorithm to calibrate the HDR camera's brightness and establish a mapping relationship between camera code values ​​and brightness.

[0142] L=p(R C G C B C )

[0143] Among them (R) C G C B C The pixel code value acquired by the camera, where L is the brightness corresponding to the pixel code value.

[0144] The experiment used an HDR camera to record 8-bit deep RGB images and calculated...

[0145] L k+(j-+)*17+(i-1)*289 =p(R) i G j B k )

[0146] Here 1≤i,j,k≤17,(R) i G j B k ) represents the code value of the image output by the surveillance camera.

[0147] R i =min{(i-1)*16,255}

[0148] G j =min{(j-1)*16,255}

[0149] B k =min{(k-1)*16,255}

[0150] The recorded content is

[0151] L1, L2, L3, …, L 4913

[0152] The camera brightness calibration LUT is transmitted to the real-time ambient light control system.

[0153] Actual calibration LUT:

[0154] 0, 0.9302, 1.7794, 2.9675, 4.5226, ..., 45.2262, 52.2135, ...

[0155] 979.5154,985.9245,992.9118

[0156] Step 3: Calibrate the color temperature, brightness and illuminance of the ambient light source installed in Step 1, form an illuminance matrix, and transmit it to the real-time ambient light control system.

[0157] The experimental light source uses three 35W LED light sources with an adjustable color temperature range of 2700K to 12000K.

[0158] Color temperature step size: Cs = 1000K;

[0159] Color temperature sampling: 3500K, 4500K, 5500K, 6500K;

[0160] Power step size: Ls = 25%

[0161] Power sampling: 25%, 50%, 75%, 100%

[0162] The illuminance calibration matrices for ambient light sources A, B, and C, after measurement, are as follows:

[0163]

[0164]

[0165]

[0166] Step 4: The real-time ambient light control system calculates the color temperature and brightness parameters of each ambient light source based on the screen display sampling data obtained by the HDR camera and generates light source driving values. The system then controls the ambient light sources to emit light according to the driving values.

[0167] In this case, the parameters are selected as follows:

[0168] μ=0.4,T p =5600,T min =3500,T max =6500

[0169] W CT =1.5,C CT =0.5

[0170] Test the red-to-blue ratio T of the playback sequence rb =1.61, average brightness

[0171] Calculate CT:

[0172] because

[0173] T 0b >W CT ,according to

[0174]

[0175] have to

[0176] CT = max{3400, 3500} = 3500

[0177] Calculate i C :

[0178]

[0179] Ambient light source illuminance M:

[0180]

[0181] because In this implementation example, let μ = 0.4, then we get

[0182] M B =0.4 × 97.85 = 39.14

[0183] M A =M C =0.3 × 97.15 = 29.36

[0184] Calculate the power ratio L of ambient light sources A, B, and C. A ,L B ,L C :

[0185] L B :

[0186] will i C =0, Substitution

[0187]

[0188]

[0189] L A :

[0190] will i C =0, Substitution

[0191]

[0192]

[0193] L C :

[0194] will i C =0, Substitution

[0195]

[0196]

[0197] The driving parameters of ambient light sources A, B, and C are (3500,49), (3500,49), and (3500,49), respectively, and are passed to the light source drivers.

[0198] Step 5: The ambient light configuration self-test system provides feedback on the ambient light configuration results. Based on the feedback log, the real-time environmental control system corrects the ambient light source setting system to alleviate discomfort caused by watching HDR images and enhance the audience's immersive experience.

[0199] For the test playback sequence, we conducted a comfort comparison experiment. The experiment involved 25 participants. The ambient light color temperature in the viewing center was 3500K, and the illuminance was set to 0 lux, 50 lux, 97 lux, and 120 lux. Comfort levels were rated at each illuminance level, ranging from 0 to 5. The average of the 25 ratings was used as the final evaluation score. The specific scores are shown in the table below.

[0200]

[0201]

[0202] In addition, a comparative experiment on viewing experience was conducted with an ambient illuminance of 97 lux and color temperatures of 3500K, 5600K, and 6500K. The score ranged from 0 to 5, and the average score of 25 people was used as the final evaluation score. The specific scores are shown in the table below:

[0203] 3500K 4.1 5600K 3.95 6500K 3.85

[0204] According to the subjective evaluation results, the ambient light configuration scheme of the present invention can alleviate the visual discomfort of viewers when watching HDR images, improve the viewing experience, enhance the viewing atmosphere, and increase the viewers' sense of immersion.

[0205] The above detailed description further illustrates the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ambient light configuration system for home viewing environments, characterized in that: The system includes an HDR camera brightness calibration system, an ambient light setting system, an ambient light calibration system, a real-time ambient light control system, and an ambient light configuration self-test system. The HDR camera brightness calibration system calibrates the correspondence between the output code value of the HDR acquired display image and the actual display brightness, and transmits the calibration data to the real-time ambient light control system. The ambient light setting system, based on measurement data of the actual viewing environment and the actual screen size, provides a spatial configuration scheme for the display screen and seats in the viewing environment, as well as an ambient light configuration scheme, and transmits the configuration scheme to the ambient light calibration system. The ambient light calibration system calibrates the illuminance of ambient light sources at different locations in the viewing center, generating calibration data that is transmitted to the real-time ambient light control system. The real-time ambient light control system performs real-time light source control based on the display content captured in real-time by the HDR camera, the calibration values ​​of the HDR camera brightness calibration system, and the calibration values ​​of the ambient light calibration system. The ambient light configuration self-test system sends the system feedback results to the real-time ambient light control system. The ambient light source setting system is used to output the spatial position configuration scheme of the display screen and seats and the configuration scheme of the ambient light source in the viewing environment based on the measurement data of the actual viewing environment and the actual size of the display screen, and to simulate and debug the ambient light source configuration scheme in the 3D modeling software. The ambient light source calibration system is used to calibrate the illuminance of each ambient light source at the sampling color temperature and brightness values ​​at the center of the viewing environment, and to transmit the calibration data to the real-time ambient light control system; the center is the midpoint of the line segment connecting the observer's eyes; The real-time ambient light control system is used to control the ambient light setting system to configure the color temperature and brightness of each ambient light source according to calibration data and display content; it consists of a real-time calculation module for the average brightness and red-blue ratio of the display screen, an ambient light source color temperature and brightness configuration module, and a light source driving module. The real-time calculation module for average brightness and red-blue ratio of the display screen calculates the average brightness and red-blue ratio of the display screen obtained by the HDR camera in real time and transmits it to the ambient light color temperature and brightness configuration module. The ambient light source color temperature and brightness configuration module transmits the color temperature and brightness parameters of each ambient light source to the light source driving module in real time based on the average brightness and red-blue ratio of the displayed screen. The light source driving module is used to drive the light source to emit light; The ambient light configuration self-test system feeds back the operation results to the real-time ambient light control system, and includes an error calculation module and a log generation module. The error calculation module is used to calculate the error between the actual color temperature of the ambient light source and the ambient light source color temperature configured by the real-time ambient light control system, as well as the error between the actual illuminance of the ambient light source and the illuminance configured by the real-time ambient light control system, and to provide feedback values. The log generation module is used to record the running time of this ambient light self-test, the ambient light source color temperature and illuminance values ​​generated by the real-time ambient light control system, the measured values ​​of the ambient light source color temperature and illuminance, and the data generated by the error calculation module.

2. A method for configuring ambient light in a home viewing environment, implemented based on the ambient light configuration system for a home viewing environment as described in claim 1, characterized in that: Includes the following steps: Step 1: Measure the actual viewing environment and locate and install the display screen and ambient light source; Step 2: Perform brightness calibration on the HDR camera and transmit the calibration data file to the real-time ambient light control system; Step 3: Calibrate the color temperature, brightness and illuminance of the ambient light source installed in Step 1, form an illuminance matrix, and transmit it to the real-time ambient light control system. Step 4: The real-time ambient light control system calculates the color temperature and brightness parameters of each ambient light source based on the screen display sampling data obtained by the HDR camera and generates light source driving values. The system then controls the ambient light sources to emit light based on the driving values. Step 5: The ambient light configuration self-test system provides feedback on the ambient light configuration results. Based on the feedback log, the real-time environmental control system corrects the ambient light source setting system to alleviate discomfort caused by watching HDR images and enhance the audience's immersive experience.

3. The method for configuring ambient light in a home viewing environment as described in claim 2, characterized in that: The implementation method of step 1 is as follows: 1.1 Setting the display screen position The midpoint of the line segment connecting the observer's eyes is ,Pass The intersection point of a straight line perpendicular to the ground and the ground is: , and The distance between them is ,Right now here Indicates length; passes through a point The intersection of a straight line parallel to the ground and the display screen is: , and The distance is ,Right now by Establish a right-handed rectangular coordinate system centered at point. , The axis is perpendicular to the ground, with the positive direction pointing upwards. shaft and Parallel, pointing directly at the screen; The screen width is Gao Wei The length of the diagonal is ;Adjustment , making satisfy: in It is a semi-horizontal perspective. It is a semi-vertical perspective; The semi-horizontal angle is when passing through a straight line And on a plane parallel to the ground, The vertex of the semi-horizontal viewpoint, the straight line An angle formed by one of its sides; The semi-vertical angle is when passing through a straight line And on a plane perpendicular to the ground, The vertex of the semi-vertical viewpoint, the straight line An angle formed by one of its sides; The bottom edge of the display screen is at ground height for: in The average seated height of the audience is the distance from the seat to the top of the audience member's head when they are seated. This is the distance from the seat surface to the ground. 1.2 Setting the location of ambient light sources Three ambient light sources are set up in area C above the observer's head and in areas A and B on both sides, which are 180 degrees above the observer's horizontal viewing angle. The illumination areas of the three ambient light sources A, B, and C are controlled by a light shield so that the area covered by the light source is the background area of ​​the movie, but does not include the core area of ​​the movie. Core viewing area: width , Gao Wei The display screen; Viewing background area: with With the axis as the horizontal field of view, the left horizontal field of view range The corresponding region and its symmetrical right-side horizontal field of view region, and the upper half of the vertical field of view range. The corresponding region is the lower half of the vertical field of view. The corresponding area.

4. The method for configuring ambient light in a home viewing environment as described in claim 3, characterized in that: The implementation method for step 2 is as follows: 2.1 Divide the display device screen into 9 zones, set the display screen mode, and input test sequences with different brightness and color values. Place a spectrophotometer and camera at the center of the viewing area. Measure the brightness values ​​of the 9 zones of the display device in this mode and calculate the average value. The camera simultaneously records the test sequence displayed on the screen, ensuring that the recorded image does not extend beyond the display device screen. 2.

2. Based on the measurement and calculation results in 2.1 and the HDR camera brightness calibration algorithm, the brightness of the HDR camera is calibrated, the correspondence between the monitoring camera code value and the brightness is established, a calibration lookup table is formed, and the table is transmitted to the real-time ambient light control system.

5. The method for configuring ambient light in a home viewing environment as described in claim 4, characterized in that: The implementation method for step 3 is as follows: Ambient light source calibration mainly calibrates the relationship between the color mixing code value of the ambient light source and its illuminance and color temperature; in the actual viewing environment, an illuminance meter is placed at the center of the viewing area. Location; Calibration point Different color temperatures, different brightness and Illuminance at that location; The light source at the point is , The light source at the point is , The light source at the point is The color temperature range of the three light sources is: The unit is Power percentage is ; Color temperature step size is Power step size is Regarding color temperature Set the light source The power ratio is ,in It is an integer, and , , Indicates rounding up; Repeat the measurement N times The illuminance at that location is The unit is lux; Its arithmetic mean is the light source At the current color temperature and brightness Illuminance at the location : light source The illuminance matrix is: Corresponding to color temperature Power percentage is Time source exist Illuminance; Repeat step 3 of the calibration process to obtain the light source. Corresponding illuminance matrix .

6. The method for configuring ambient light in a home viewing environment as described in claim 5, characterized in that: The implementation method for step 4 is as follows: 4.1 The display screen monitoring camera samples the display screen content using continuous sampling, equal time interval sampling, or frame interval sampling; the monitoring data is transmitted to the ambient light control system in real time, and the average brightness calculation module calculates the average brightness of the sampled display image in real time according to the calibration lookup table in step 2.

2. Simultaneously calculate the average red-blue ratio of the displayed image. This information is then passed to the ambient light driver module. time The screen image data acquired by the screen monitoring camera is , for A three-dimensional matrix; 4.1.1 Average brightness of the sampled display image The unit is It is obtained by the following method: By using a lookup table of camera code values ​​and brightness, and through interpolation methods, the following calculations are performed. Corresponding average brightness ; 4.1.2 Displaying the average red-blue ratio of the image Obtained by the following method:

2. Based on the sampled average brightness transmitted by the display average brightness calculation module. and the average red-blue ratio of the displayed image ,Sure Ambient light color temperature and illuminance And calculate ambient light. power percentage Then the parameters The parameters are passed to the light source driver module; when entering the ambient light self-test mode, the ambient light color temperature and brightness configuration module will transmit the ambient light source parameters. The error calculation module of the ambient light self-test system is passed to the system. The calculation methods for ambient light source color temperature and brightness are as follows: 4.2.1 Ambient light source color temperature Obtained in the following way: like , like like in Given a red-to-blue ratio threshold parameter, and , , Indicates will Set the value after the hundreds place to 0. Given a color temperature parameter, which is related to the color temperature of the viewing environment wall, and ; ambient light intensity Calculated by the following formula: here Therefore A logarithmic function with base 0; 4.2.3 Ambient Light Source Light source brightness parameters Calculated in the following ways: for Ambient light source Illuminance: Assign parameters to the illuminance of the light source to satisfy: if , ;otherwise ,here Ambient light source At a color temperature of ,power The illuminance of the movie theater; Pick like , otherwise here ; 4.

3. Based on the color temperature and brightness parameters of the light source. Drive ambient light sources; each light source The corresponding driving parameters are: .

7. The method for configuring ambient light in a home viewing environment as described in claim 6, characterized in that: The implementation method for step 5 is as follows: Different brightness, monochrome detection sequence frames are output to the display screen. The ambient light source is driven by the real-time light environment control system, and the illuminance is measured using a lux meter. Illuminance of ambient light source and color temperature The measurement results are then passed to the error calculation module and the log generation module. The error calculation module uses this set of data and the theoretical ambient light source color temperature (CT) and illuminance parameters transmitted by the ambient light source color temperature and brightness configuration module. Calculate the error between the actual and theoretical values ​​of ambient color temperature and light source illuminance in the detection sequence frames. Passed to the log generation module; If the error value is within the given error range, the feedback value A value of 0 indicates that the color temperature and illuminance are normal. If the error exceeds the given error range, the feedback value The following conditions must be met: 1- Only color temperature exceeds the error range; 2- Only illuminance exceeds the error range; 3- Both color temperature and illuminance exceed the error range. These conditions must be passed to the log generation module. (Color temperature error) and illuminance error Obtained in the following ways: in It is an absolute value function; Feedback value : in For a given color temperature and illuminance tolerance value.

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