CN114143523A - Brightness adjusting method and device, projection equipment and storage medium - Google Patents
Brightness adjusting method and device, projection equipment and storage medium Download PDFInfo
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Abstract
The application discloses a brightness adjusting method, a brightness adjusting device, projection equipment and a storage medium, wherein the method comprises the following steps: acquiring a picture brightness value of a projection picture; acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture; acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture; determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value; and adjusting the projection brightness of the projection equipment according to the ambient light brightness value. The method and the device have the advantages that the influence and interference of the projection picture in the brightness adjusting process are reduced in the projection brightness adjusting process, and the projection brightness of the projection equipment can be adjusted more accurately.
Description
Technical Field
The present disclosure relates to the field of projection adjustment technologies, and in particular, to a brightness adjustment method and apparatus, a projection device, and a storage medium.
Background
The use of projectors or projection devices has become more common in people's life, study and work. However, the projection device may be affected by the environment during the use process, for example, when the ambient light is too strong, the reflected light of the picture and the ambient reflected light are overlapped, so that the user cannot see the picture clearly, and for example, when the ambient light is too weak, the high-brightness projection picture may make the user feel dazzling.
Projection devices today address this problem in ways that include manual adjustment and automatic adjustment. However, there are certain problems, such as that manual brightness adjustment is laborious and time-consuming, and the current automatic adjustment method has inaccurate adjustment.
Therefore, a brightness adjustment method for improving the brightness adjustment accuracy of the projection plane is needed.
Disclosure of Invention
The embodiment of the application aims to provide a brightness adjusting method, a brightness adjusting device, a projection device and a storage medium, so that the influence and interference of a projection picture in the brightness adjusting process are reduced, and the brightness adjustment of a projection surface can be more accurate.
In a first aspect, to achieve the above object, an embodiment of the present application provides a brightness adjustment method, including:
acquiring a picture brightness value of a projection picture;
acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture;
acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
Further, the initial impact value is obtained by the following steps:
acquiring a first projection picture and a second projection picture, wherein the RGB value of the first projection picture is greater than that of the second projection picture;
calculating to obtain a first image brightness value of the first projection image and a second image brightness value of the second projection image;
acquiring a first brightness value when the first projection picture is played and a second brightness value when the second projection picture is played according to the brightness sensor;
and determining an initial influence value according to the first image brightness value, the second image brightness value, the first brightness value and the second brightness value.
Further, the initial impact value is obtained by the following steps:
playing a preset picture, and acquiring a third brightness value acquired by the brightness sensor;
acquiring a fourth brightness value acquired by the sensor when the projection equipment does not project;
and determining the initial influence value according to the third brightness value and the fourth brightness value.
Further, the determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial impact value includes:
obtaining a brightness deviation value according to the picture brightness value and the initial influence value;
and obtaining an ambient light brightness value according to the total brightness value and the brightness deviation value.
Further, the adjusting the projection brightness of the projection device according to the ambient light brightness value includes:
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and stepless adjusting the brightness of the projection equipment according to the projection brightness parameters.
Further, the adjusting the projection brightness of the projection device according to the ambient light brightness value includes:
acquiring a current projection brightness value of the projection equipment;
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and when the difference value between the projection brightness parameter and the current projection brightness value meets a preset condition, adjusting the projection brightness of the projection equipment according to the projection brightness parameter.
Further, the determining the picture brightness value of the projection picture includes:
acquiring RGB mean values of the projection picture, wherein the RGB mean values comprise an R mean value, a G mean value and a B mean value;
acquiring a preset RGB weight value, and determining a picture brightness value of the projection picture according to the RGB mean value and the RGB weight value, wherein the RGB weight value comprises an R weight, a G weight and a B weight.
In a second aspect, to solve the same technical problem, an embodiment of the present application provides a brightness adjustment device, including:
the image acquisition module is used for acquiring the image brightness value of the projection image;
the brightness acquisition module is used for acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, and the acquisition range of the brightness sensor comprises the projection picture;
the data acquisition module is used for acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
the brightness calculation module is used for determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and the brightness adjusting module is used for adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
In a third aspect, to solve the same technical problem, an embodiment of the present application provides a projection apparatus, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the memory is coupled to the processor, and the processor implements the steps in the brightness adjustment method described in any one of the above when executing the computer program.
In a fourth aspect, in order to solve the same technical problem, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, where the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform any one of the steps in the brightness adjustment method described above.
The method comprises the steps of firstly obtaining a currently played projection picture, determining a picture brightness value corresponding to the currently played projection picture, further determining the influence of the projection picture played on a projection area on the environment brightness, then eliminating the influence of the currently played projection picture on the environment brightness when obtaining a total brightness value acquired by a brightness sensor when playing the projection picture, so as to accurately obtain the real brightness value of the environment, and finally adjusting the brightness of the projection device according to the obtained real environment brightness value. The influence and the interference of a projection picture on brightness adjustment in the projection process are reduced, so that the brightness adjustment of the projection equipment can be more accurate.
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Fig. 1 is a schematic flowchart of a brightness adjustment method according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating a step of determining a brightness value of a frame according to an embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating the steps provided by the present embodiment for determining an initial impact value;
fig. 4 is a schematic flowchart of a step of adjusting the brightness of the projection surface according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another projection apparatus provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be understood that the various steps recited in the method embodiments disclosed herein may be performed in a different order and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the disclosure is not limited in this respect.
The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.
In the projection process of the projection device, the appearance of a projection picture is influenced remarkably by ambient light. For example, when the ambient light is dark, if the projected image is too bright, the user may feel too dazzling; when the ambient light is bright, if the projected picture is too dark, it is difficult for the user to see the projected picture clearly. Therefore, adjusting the projection brightness according to the ambient light brightness value is a problem that needs to be solved urgently by the projection device.
In general, a sensor may be used to collect the brightness of the ambient light, and then the projection brightness of the projection device may be adjusted according to the collected brightness of the ambient light. When the sensor is used to collect the brightness of the ambient light, the brightness of the light reflected by the projection surface can be directly collected by directing the sensor to the projection surface, but the brightness thus collected includes the brightness of the light reflected by the projection screen on the projection surface. Therefore, if an accurate ambient light brightness value needs to be obtained, the brightness value of the light reflected when the projection picture is projected on the projection plane needs to be eliminated from the brightness collected by the sensor.
The sensor collecting range of the projection device covers the whole projection picture, the brightness value collected by the sensor is used for eliminating the brightness value of light reflected when the projection picture is projected on the projection surface, the real environment light brightness value can be obtained, and then the projection brightness of the projection device is adjusted according to the real environment light brightness value.
Referring to fig. 1, fig. 1 is a schematic flow chart of a brightness adjustment method according to an embodiment of the present disclosure, and as shown in fig. 1, the brightness adjustment method for a projection surface according to the embodiment of the present disclosure includes steps S101 to S105.
And step S101, acquiring the brightness value of the projection picture.
In the projection process, content information projected by the projection equipment, such as videos or characters, is displayed or shown on the projection surface, and the display of the picture is realized by utilizing the diffuse reflection of the projection surface. In the actual brightness adjustment process of the projection device, automatic adjustment needs to be performed according to the actual viewing condition, so that a currently played projection picture of the projection plane needs to be acquired, and then the real ambient brightness is determined according to the currently played projection picture, so as to perform subsequent automatic brightness adjustment.
When brightness is automatically adjusted, the brightness condition of the current environment needs to be accurately acquired, and then the brightness is accurately adjusted. However, since the actual projection image also has a certain influence when the brightness of the current environment is measured, for example, the actually measured total brightness includes the real environment brightness and the brightness generated by the projection image, when the real environment brightness is determined, the brightness generated by the projection image needs to be removed from the measured brightness.
In an embodiment, when determining the picture brightness value of the current projection picture, referring to fig. 2, fig. 2 is a schematic flow chart of the step of determining the picture brightness value according to the embodiment of the present application. Wherein the step includes steps S201 to S202.
Step S201, obtaining RGB mean values of the projection picture, wherein the RGB mean values comprise an R mean value, a G mean value and a B mean value;
step S202, obtaining a preset RGB weight value, and determining a picture brightness value of the projection picture according to the RGB mean value and the RGB weight value, wherein the RGB weight value comprises an R weight, a G weight and a B weight.
When determining the image brightness value of the projection image, first, an RGB (Red, Green, Blue, Red, Green, Blue) average value in the projection image is obtained, and the RGB average value is obtained by averaging RGB values of each pixel in the projection image. Specifically, including the mean of R, G and B, in RGB mode, each RGB component can use a value from 0 (black) to 255 (white), for example, the RGB component corresponding to bright red has an R value of 246, a G value of 20, and a B value of 50, that is, the color of each pixel point can be represented by a number or a combination of numbers in RGB mode.
After the RGB mean value of each pixel point in the image is obtained, the image brightness value corresponding to the current projection image is determined according to the weight of the brightness influence of different RGB. The influence of RGB on brightness is reflected in the difference of weight values of different colors in three colors, so that the picture brightness value of the projection picture can be determined after the influence weight of each color on brightness is obtained.
Illustratively, when the RGB mean value corresponding to each pixel point in the projection picture is obtained through calculation, the mean value of the R value, the G value, and the B value is obtained by obtaining the sum of the R value, the G value, and the B value of each pixel point in the projection picture, and then dividing the sum by the number of the pixel points. When the image brightness value of the projection image is obtained by calculation, the image brightness value can be obtained according to the following formula:
Y＝A*R_Avg+B*G_Avg+C*B_Avg
wherein, Y is the brightness value of the picture. Specifically, the frame luminance value of a pure white frame is 1, the frame luminance value of a pure black frame is 0, a is a weight value of R, B is a weight value corresponding to G, C is a weight value corresponding to B, a + B + C is 1, R _ Avg is a mean value of R, G _ Avg is a mean value of G, and B _ Avg is a mean value of B.
Step S102, acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture.
When the influence of the projection picture on the brightness of the environment is eliminated, the brightness value of the current environment needs to be acquired, specifically, brightness acquisition is performed through the set brightness sensor to obtain a total brightness value when the projection picture is played, wherein the total brightness value includes the brightness of the real environment and the brightness reflected by the projection picture.
Step S103, obtaining an initial influence value, wherein the initial influence value is the projection gain of the area displaying the projection ring surface.
Since the obtained image brightness value of the projection image is not the direct brightness influence value of the projection image, after obtaining the total brightness value collected by the brightness sensor, it is further required to obtain an initial influence value measured in advance, where the initial influence value is a projection gain of an area displaying the projection image, and projection gains corresponding to different areas are different, for example, due to different materials used in the projection area, the reflectance of light is different, so that light with the same intensity is irradiated onto planes of different materials, and reflected light collected by the sensor is different.
In an embodiment, referring to fig. 3, fig. 3 is a schematic flow chart of the step of determining the initial impact value provided in the embodiment, wherein the step includes step S301 to step S304.
Step S301, acquiring a first projection picture and a second projection picture, wherein the RGB value of the first projection picture is greater than that of the first projection picture;
step S302, calculating to obtain a first image brightness value of the first projection image and a second image brightness value of the second projection image;
step S303, according to the first brightness value corresponding to the first projection image collected and played by the brightness sensor, playing the second brightness value corresponding to the second projection image;
step S304, determining an initial influence value according to the first image brightness value, the second image brightness value, the first brightness value and the second brightness value.
When the initial influence value is obtained through calculation, a first projection picture and a second projection picture can be screened from a section of video, the RGB value of the first projection picture is larger than that of the second projection picture, then a first picture brightness value corresponding to the first projection picture is calculated, a second picture brightness value corresponding to the second projection picture is calculated, meanwhile, when the first projection picture and the second projection picture are obtained, a first brightness value collected by a brightness sensor when the first projection picture is played and a second brightness value collected by the brightness sensor when the second projection picture is played are obtained, and finally the initial influence value is obtained according to the obtained first picture brightness value, the obtained second picture brightness value, the obtained first brightness value and the obtained second brightness value.
In practical applications, the first projection picture and the second projection picture may be projection pictures played within a certain period of time, but the time interval between the first projection picture and the second projection picture should not be too long, and the set time period may be set to 3 minutes in order to reduce the influence caused by the automatic change of the ambient brightness. When the initial influence value is obtained through calculation, the initial influence value is determined by acquiring the projection pictures with large brightness changes of the two projection pictures, but the initial influence value is not limited to the maximum and minimum brightness of the two captured projection pictures played, and may be determined according to the actual RGB values of the projection pictures.
For example, in a set period of time, the number of the projection pictures displayed on the projection area is a certain number, and may be obtained by obtaining RGB values of each projection picture, where the larger the RGB value is, the higher the brightness is, and then determining the first projection picture and the second projection picture according to the RGB values, for example, selecting a projection picture with an RGB value greater than 200 as the first projection picture, and selecting a projection picture with an RGB value less than 50 as the second projection picture.
In addition, when the first projection picture and the second projection picture are determined, each projection picture can be sorted according to the RGB values, and then a projection picture is selected as the first projection picture from the high RGB value projection pictures and a projection picture is selected as the second projection picture from the low RGB value projection pictures.
It should be noted that the "first projection picture" and the "second projection picture" may be interchanged, and do not affect the implementation of the scheme.
After the first projection picture and the second projection picture are determined, the picture brightness values corresponding to the first projection picture and the second projection picture, respectively, are determined, and the picture brightness values of the projection pictures are obtained in the same manner as the picture brightness values obtained in step S101, so that no description is made here, and reference may be made to the above-mentioned embodiment.
Meanwhile, for a projection picture, the brightness sensor acquires a total brightness value, for example, the brightness sensor acquires a first brightness value when the first projection picture is played, and acquires a second brightness value when the second projection picture is played. Thus, after obtaining the parameters, an initial impact value may be obtained, specifically, the initial impact value may be as follows:
wherein δ is the initial impact value, a is the first luminance value, B is the second luminance value, a is the first frame luminance value, and B is the second frame luminance value.
In an embodiment, the initial impact value may be determined during use of the projection device. There is also a determination method of the initial influence value, which specifically includes: playing a preset picture, and acquiring a third brightness value acquired by a brightness sensor; acquiring a fourth brightness value acquired by a brightness sensor when the projection equipment does not project; and obtaining an initial influence value according to the third brightness value and the fourth brightness value.
That is, before use, the projection device is controlled to play a preset picture, where the preset picture may be a pure white picture, a third brightness value acquired by the brightness sensor at that time is acquired, a fourth brightness value acquired by the brightness sensor when the projector is not projecting (for example, the projector is turned off or a lens of the projector is covered) is acquired, and then the third brightness value is used to subtract the fourth brightness value, so as to obtain an initial influence value.
Actually, the third brightness value includes a brightness value generated by reflection of the preset image when the preset image is played, and the fourth brightness value is a brightness value acquired when the projection surface does not have the projection image and only reflects the ambient light, which is the real ambient brightness, and the initial influence value can be obtained according to the third brightness value and the fourth brightness value.
And step S104, determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value.
After obtaining the total brightness value collected by the brightness sensor in the current playing environment, since the influence of the projection picture on the total brightness needs to be eliminated, the current brightness deviation value needs to be determined, where the brightness deviation value is the brightness value that needs to be eliminated, that is, after obtaining the brightness deviation value, the actual ambient light brightness value is obtained by subtracting the brightness deviation value from the total brightness value collected by the sensor.
In one embodiment, after obtaining the total brightness value and the initial impact value, the real ambient light brightness value is determined according to the frame brightness value, the total brightness value and the initial impact value.
Specifically, when determining the current projection luminance value, a luminance deviation value in the ambient light luminance value of the currently played projection picture is first determined, and then a true luminance value of the environment, that is, an ambient light luminance value is determined according to the luminance deviation value. Specifically, when determining an influence value of a currently played projection picture on a brightness sensor, the method includes: obtaining a brightness deviation value according to the picture brightness value and the initial influence value; and obtaining the brightness value of the ambient light according to the total brightness value and the brightness deviation value.
For example, since different projection pictures have different brightness due to reflection during playing, wherein the brighter the projection picture, the greater the brightness is generated, and the brighter the picture indicates that the RGB value of the projection picture is greater at this time, i.e. the picture brightness value is greater, when determining the brightness deviation value, the brightness deviation value is determined according to the picture brightness value of the projection picture and the initial influence value, for example, the current brightness deviation value is: and (4) eliminating the brightness deviation value in the total brightness value by the initial influence value of the brightness value, wherein the brightness deviation value can be directly subtracted when the brightness deviation value is eliminated because the superposition of the brightness is a linear superposition mode.
And S105, adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
After the real ambient light brightness value is obtained, the projection device is controlled to perform brightness adjustment, that is, a projection brightness parameter of the projection device is determined according to the determined real ambient light brightness value, so as to realize automatic brightness adjustment.
In one embodiment, when the actual ambient light brightness value is obtained, how to adjust the brightness of the projection device at the time is determined according to the obtained ambient brightness value. Specifically, the brightness of the projection device corresponding to different ambient light brightness values is different, and the projection brightness of the projection device corresponding to different ambient brightness values can be determined by preset settings.
Referring to fig. 4, fig. 4 is a schematic flow chart of a step of adjusting the brightness of the projection surface according to an embodiment of the present application. Wherein the steps include steps S401 to S402.
Step S401, determining a corresponding projection brightness parameter according to the ambient light brightness value;
and S402, performing stepless regulation on the brightness of the projection equipment according to the projection brightness parameters.
The electrodeless adjustment is that the adjustment mode is not a jump type, and is any relatively smooth adjustment within a range, for example, when the projection brightness of the projection equipment is adjusted, the current projection brightness is smoothly adjusted to the projection brightness needing to be adjusted, and bad experience caused by sudden change of the projection brightness is avoided.
For example, when determining the brightness parameters of the projection surface corresponding to different brightness values of the ambient light, the brightness parameters may be obtained in a preset manner, for example, the corresponding relationship between different ambient brightness and different brightness parameters is preset, and then the query is performed by query matching.
For example, a brightness parameter correspondence table recorded and stored in advance is obtained, and the obtained ambient brightness is queried and matched in the brightness parameter correspondence table to determine a brightness parameter matching the obtained current ambient brightness, and finally, the brightness parameter of the projection surface is set according to the obtained brightness parameter to realize the brightness adjustment of the projection device.
For the set luminance parameter correspondence table, a luminance parameter corresponding to one ambient luminance may be recorded, a luminance parameter corresponding to one ambient luminance interval may be recorded, and a functional relationship between the ambient luminance value and the luminance parameter value may be recorded, such as y ═ f (x).
In an actual application process, since different people have different perceptions of brightness, when determining correspondence between different ambient light brightness values and brightness parameters, the correspondence may be obtained by integrating big data, specifically including: acquiring a plurality of groups of brightness parameter combinations, wherein one group of brightness parameter combinations comprises an ambient light brightness value and a brightness parameter value, and one ambient light brightness value in each group corresponds to one brightness parameter value; and performing function fitting on the brightness parameter values in the plurality of groups of brightness parameter combinations based on the ambient light brightness value to obtain a brightness parameter corresponding table.
Specifically, since each person has different sensitivity to brightness, a function curve can be obtained by recording the corresponding projection brightness parameters of different groups under different ambient brightness and then by function fitting of big data. In practical applications, for a plurality of points scattered in a two-dimensional coordinate system, a function curve can be obtained by processing the scattered points, and in the case that sensitivity of people to brightness is different, brightness of corresponding projection surfaces under the same ambient brightness is slightly different, but the difference is not very obvious.
In an embodiment, when the brightness of the projection device is automatically adjusted, because the brightness is automatically adjusted in real time, but the real-time use process and the real-time change of the environment are considered, in order to ensure a better viewing experience, a pseudo real-time adjustment mode can be set in the brightness adjustment process, specifically, the actual brightness values in the projection picture and the current environment are obtained in real time in the adjustment process, but the adjustment is not performed as long as there is a difference in the adjustment process.
Illustratively, when adjusting the projection brightness of the projection device, the method may further include: acquiring a current projection brightness value of the projection equipment, and determining a corresponding projection brightness parameter according to an environment light brightness value; and when the projection brightness parameter and the current projection brightness value meet the preset condition, adjusting the projection brightness of the projection equipment according to the projection brightness parameter.
Specifically, the current projection brightness value of the projection device is determined when determining whether to adjust, and then it is determined whether the obtained projection brightness parameter satisfies the preset condition, so that brightness adjustment is performed when the preset condition is satisfied, and brightness adjustment will not be performed when the preset condition is not satisfied.
For example, when brightness adjustment is performed, if the adjustment range of brightness adjustment is small, when there is no influence on viewing experience, no adjustment may be performed appropriately. For example, if the brightness of the current projection device is 100 lumens, and it is determined that it needs to be adjusted to 105 lumens, the difference is only 5 lumens, which has little effect on the actual viewing, so that the brightness adjustment may not be performed at this time.
Thus, for the preset condition, the preset condition may be: the absolute value of the difference between the brightness value corresponding to the obtained projection brightness parameter and the current projection brightness value is greater than a preset threshold, wherein the preset threshold can be set according to the actual situation without limitation, when the preset condition is met, the brightness difference is large at the moment, brightness adjustment is required, and when the preset condition is not met, the brightness change is small at the moment, and the brightness adjustment is not required.
To sum up, the brightness adjusting method provided in the embodiment of the present application includes, when adjusting the brightness of the projection device, first obtaining a currently played projection picture, and determining a picture brightness value corresponding to the currently played projection picture, and further determining an influence of the projection picture played on a projection area on the ambient brightness, then, when obtaining a total brightness value acquired by a brightness sensor when playing the projection picture, removing the influence of the currently played projection picture on the ambient brightness to accurately obtain a real brightness value of an environment, and finally adjusting the brightness of the projection device according to the obtained real ambient brightness value. The influence and the interference of a projection picture on brightness adjustment in the projection process are reduced, so that the brightness adjustment of the projection equipment can be more accurate.
According to the method described in the foregoing embodiment, the embodiment will be further described from the perspective of a brightness adjustment apparatus, which may be specifically implemented as an independent entity, or may be implemented by being integrated in a projection device, such as a terminal, where the terminal may include a mobile phone, a tablet computer, and the like.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present disclosure, and as shown in fig. 5, a brightness adjustment device 500 according to an embodiment of the present disclosure includes:
a picture obtaining module 501, configured to obtain a picture brightness value of a projection picture;
a brightness acquisition module 502, configured to acquire a total brightness value acquired by a brightness sensor when the projection image is played, where an acquisition range of the brightness sensor includes the projection image;
a data obtaining module 503, configured to obtain an initial impact value, where the initial impact value is a projection gain of an area where the projection picture is displayed;
a brightness calculation module 504, configured to determine an ambient light brightness value according to the picture brightness value, the total brightness value, and the initial impact value;
and a brightness adjusting module 505, configured to adjust the projection brightness of the projection device according to the ambient light brightness value.
In an embodiment, the brightness adjusting apparatus 500 is further specifically configured to:
acquiring a first projection picture and a second projection picture, wherein the RGB value of the first projection picture is greater than that of the second projection picture;
calculating to obtain a first image brightness value of the first projection image and a second image brightness value of the second projection image;
acquiring a first brightness value when the first projection picture is played and a second brightness value when the second projection picture is played according to the brightness sensor;
and determining an initial influence value according to the first image brightness value, the second image brightness value, the first brightness value and the second brightness value.
In an embodiment, the brightness adjusting apparatus 500 is further specifically configured to:
playing a preset picture, and acquiring a third brightness value acquired by the brightness sensor;
acquiring a fourth brightness value acquired by the sensor when the projection equipment does not project;
and determining the initial influence value according to the third brightness value and the fourth brightness value.
In an embodiment, the luminance calculating module 504 is further specifically configured to:
obtaining a brightness deviation value according to the picture brightness value and the initial influence value;
and obtaining an ambient light brightness value according to the total brightness value and the brightness deviation value.
In an embodiment, the luminance calculating module 504 is further specifically configured to:
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and stepless adjusting the brightness of the projection equipment according to the projection brightness parameters.
In an embodiment, the brightness adjusting module 505 is further specifically configured to:
acquiring a current projection brightness value of the projection equipment;
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and when the difference value between the projection brightness parameter and the current projection brightness value meets a preset condition, adjusting the projection brightness of the projection equipment according to the projection brightness parameter.
In an embodiment, the image obtaining module 501 is further specifically configured to:
acquiring RGB mean values of the projection picture, wherein the RGB mean values comprise an R mean value, a G mean value and a B mean value;
acquiring a preset RGB weight value, and determining a picture brightness value of the projection picture according to the RGB mean value and the RGB weight value, wherein the RGB weight value comprises an R weight, a G weight and a B weight.
In a specific implementation, each of the modules and/or units may be implemented as an independent entity, or may be implemented as one or several entities by any combination, where the specific implementation of each of the modules and/or units may refer to the foregoing method embodiment, and specific achievable beneficial effects also refer to the beneficial effects in the foregoing method embodiment, which are not described herein again.
In addition, please refer to fig. 6, where fig. 6 is a schematic structural diagram of a projection device according to an embodiment of the present application, and the projection device may be a projector, and may also be a mobile terminal such as a smart phone, a tablet computer, and the like. As shown in fig. 6, projection device 600 includes a processor 601, a memory 602. The processor 601 is electrically connected to the memory 602.
The processor 601 is a control center of the projection apparatus 600, connects various parts of the entire projection apparatus using various interfaces and lines, and performs various functions of the projection apparatus 600 and processes data by running or loading an application program stored in the memory 602 and calling data stored in the memory 602, thereby performing overall monitoring of the projection apparatus 600.
In this embodiment, the processor 601 in the projection device 600 loads instructions corresponding to processes of one or more application programs into the memory 602, and the processor 601 executes the application programs stored in the memory 602, so as to implement various functions as follows:
acquiring a picture brightness value of a projection picture;
acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture;
acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
The projection device 600 can implement the steps in any embodiment of the brightness adjustment method provided in the embodiment of the present application, and therefore, the beneficial effects that can be achieved by any brightness adjustment method provided in the embodiment of the present application can be achieved, for details, see the foregoing embodiment, and are not described herein again.
Referring to fig. 7, fig. 7 is another schematic structural diagram of a projection apparatus provided in the embodiment of the present application, and as shown in fig. 7, fig. 7 is a specific structural block diagram of the projection apparatus provided in the embodiment of the present application, where the projection apparatus may be used to implement the brightness adjustment method provided in the embodiment. The projection device 700 may be a projector, a mobile terminal such as a smart phone or a notebook computer, and the like.
The RF circuit 710 is used for receiving and transmitting electromagnetic waves, and performing interconversion between the electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. The RF circuitry 710 may include various existing circuit elements for performing these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption/decryption chips, Subscriber Identity Module (SIM) cards, memory, and so forth. The RF circuit 710 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., Institute of Electrical and Electronics Engineers (IEEE) standard IEEE802.11 a, IEEE802.11 b, IEEE802.11g, and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide mail Access (Microwave Access for micro), wimax-1, other suitable short message protocols, and any other suitable Protocol for instant messaging, and may even include those protocols that have not yet been developed.
The memory 720 may be used for storing software programs and modules, such as program instructions/modules corresponding to the brightness adjustment method in the above-mentioned embodiment, and the processor 780 executes various functional applications and brightness adjustment by running the software programs and modules stored in the memory 720, so as to implement the following functions:
acquiring a picture brightness value of a projection picture;
acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture;
acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.
The memory 720 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 720 may further include memory located remotely from processor 780, which may be connected to projection device 700 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input unit 730 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 730 may include a touch-sensitive surface 731 as well as other input devices 732. Touch-sensitive surface 731, also referred to as a touch display screen or touch pad, can collect touch operations by a user on or near touch-sensitive surface 731 (e.g., operations by a user on or near touch-sensitive surface 731 using a finger, stylus, or any other suitable object or attachment) and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 731 may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts it to touch point coordinates, and sends the touch point coordinates to the processor 780, and can receive and execute commands from the processor 780. In addition, the touch-sensitive surface 731 can be implemented in a variety of types, including resistive, capacitive, infrared, and surface acoustic wave. The input unit 730 may also include other input devices 732 in addition to the touch-sensitive surface 731. In particular, other input devices 732 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 740 may be used to display information input by or provided to a user and various graphical user interfaces of the projection device 700, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 740 may include a Display panel 741, and optionally, the Display panel 741 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, touch-sensitive surface 731 can overlay display panel 741, such that when touch-sensitive surface 731 detects a touch event thereon or nearby, processor 780 can determine the type of touch event, and processor 780 can then provide a corresponding visual output on display panel 741 based on the type of touch event. Although in the figure the touch-sensitive surface 731 and the display panel 741 are shown as two separate components to implement input and output functions, in some embodiments the touch-sensitive surface 731 and the display panel 741 may be integrated to implement input and output functions.
Projection device 700 may also include at least one sensor 750, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 741 according to the brightness of ambient light, and a proximity sensor that may generate an interrupt when the folder is closed or closed. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors, such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured for the projection device 700, further description is omitted here.
The audio circuit 760, speaker 761, and microphone 762 may provide an audio interface between a user and the projection device 700. The audio circuit 760 can transmit the electrical signal converted from the received audio data to the speaker 761, and the electrical signal is converted into a sound signal by the speaker 761 and output; on the other hand, the microphone 762 converts the collected sound signal into an electric signal, converts the electric signal into audio data after being received by the audio circuit 760, processes the audio data by the audio data output processor 780, and transmits the processed audio data to, for example, another terminal via the RF circuit 710, or outputs the audio data to the memory 720 for further processing. The audio circuitry 760 may also include an ear-bud jack to provide communication of peripheral headphones with the projection device 700.
Projection device 700, via transport module 770 (e.g., a Wi-Fi module), may assist a user in receiving requests, sending information, etc., which provides the user with wireless broadband internet access. Although the transmission module 770 is illustrated in the drawings, it is understood that it does not belong to the essential constitution of the projection apparatus 700 and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 780 is a control center of the projection apparatus 700, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the projection apparatus 700 and processes data by operating or executing software programs and/or modules stored in the memory 720 and calling data stored in the memory 720, thereby monitoring the projection apparatus as a whole. Optionally, processor 780 may include one or more processing cores; in some embodiments, processor 780 may integrate an application processor that handles primarily the operating system, user interface, applications, etc. and a modem processor that handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 780.
Projection device 700 also includes a power supply 790 (e.g., a battery) that provides power to various components, which in some embodiments may be logically coupled to processor 780 via a power management system, such that the power management system may manage charging, discharging, and power consumption management functions. The power supply 790 may also include any component including one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
Although not shown, the projection device 700 further includes a camera (e.g., a front camera, a rear camera), a bluetooth module, and the like, which are not described in detail herein. Specifically, in this embodiment, the display unit of the projection device is a touch screen display, the mobile terminal further includes a memory, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the one or more processors, where the one or more programs include instructions for:
acquiring a picture brightness value of a projection picture;
acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture;
acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, an embodiment of the present application provides a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps of any embodiment of the brightness adjusting method provided in the embodiment of the present application.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium can execute the steps in any embodiment of the brightness adjustment method provided in the embodiment of the present application, beneficial effects that can be achieved by any brightness adjustment method provided in the embodiment of the present application can be achieved, which are detailed in the foregoing embodiments and will not be described herein again.
The foregoing detailed description has provided a brightness adjustment method, an apparatus, a projection device, and a storage medium according to embodiments of the present application, and specific examples have been applied in the present application to explain the principles and implementations of the present application, and the descriptions of the foregoing embodiments are only used to help understand the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application. Moreover, it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present application and these modifications and adaptations are intended to be within the scope of the present application.
Claims (10)
1. A brightness adjustment method, comprising:
acquiring a picture brightness value of a projection picture;
acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, wherein the acquisition range of the brightness sensor comprises the projection picture;
acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
2. The method of claim 1, wherein the initial impact value is obtained by:
acquiring a first projection picture and a second projection picture, wherein the RGB value of the first projection picture is greater than that of the second projection picture;
calculating to obtain a first image brightness value of the first projection image and a second image brightness value of the second projection image;
acquiring a first brightness value when the first projection picture is played and a second brightness value when the second projection picture is played according to the brightness sensor;
and determining an initial influence value according to the first image brightness value, the second image brightness value, the first brightness value and the second brightness value.
3. The method of claim 1, wherein the initial impact value is obtained by:
playing a preset picture, and acquiring a third brightness value acquired by the brightness sensor;
acquiring a fourth brightness value acquired by the sensor when the projection equipment does not project;
and determining the initial influence value according to the third brightness value and the fourth brightness value.
4. The method of claim 1, wherein said determining an ambient light brightness value based on said picture brightness value, said total brightness value, and said initial impact value comprises:
obtaining a brightness deviation value according to the picture brightness value and the initial influence value;
and obtaining an ambient light brightness value according to the total brightness value and the brightness deviation value.
5. The method of claim 1, wherein said adjusting the projection brightness of the projection device based on the ambient light brightness value comprises:
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and stepless adjusting the brightness of the projection equipment according to the projection brightness parameters.
6. The method of claim 1, wherein said adjusting the projection brightness of the projection device based on the ambient light brightness value comprises:
acquiring a current projection brightness value of the projection equipment;
determining a corresponding projection brightness parameter according to the ambient light brightness value;
and when the difference value between the projection brightness parameter and the current projection brightness value meets a preset condition, adjusting the projection brightness of the projection equipment according to the projection brightness parameter.
7. The method according to any one of claims 1 to 6, wherein the obtaining of the picture luminance value of the projection picture comprises:
acquiring RGB mean values of the projection picture, wherein the RGB mean values comprise an R mean value, a G mean value and a B mean value;
acquiring a preset RGB weight value, and determining a picture brightness value of the projection picture according to the RGB mean value and the RGB weight value, wherein the RGB weight value comprises an R weight, a G weight and a B weight.
8. A luminance adjustment device, characterized by comprising:
the image acquisition module is used for acquiring the image brightness value of the projection image;
the brightness acquisition module is used for acquiring a total brightness value acquired by a brightness sensor when the projection picture is played, and the acquisition range of the brightness sensor comprises the projection picture;
the data acquisition module is used for acquiring an initial influence value, wherein the initial influence value is the projection gain of a region for displaying the projection picture;
the brightness calculation module is used for determining an ambient light brightness value according to the picture brightness value, the total brightness value and the initial influence value;
and the brightness adjusting module is used for adjusting the projection brightness of the projection equipment according to the ambient light brightness value.
9. A projection device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the memory being coupled to the processor and the processor implementing the steps of the brightness adjustment method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, wherein when the computer program runs, the computer-readable storage medium is controlled to execute the steps in the brightness adjustment method according to any one of claims 1 to 7.
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