CN113891053A - Projection equipment control method, device, medium and electronic equipment - Google Patents

Projection equipment control method, device, medium and electronic equipment Download PDF

Info

Publication number
CN113891053A
CN113891053A CN202111248026.4A CN202111248026A CN113891053A CN 113891053 A CN113891053 A CN 113891053A CN 202111248026 A CN202111248026 A CN 202111248026A CN 113891053 A CN113891053 A CN 113891053A
Authority
CN
China
Prior art keywords
projection
color
light
diffuse reflection
color value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111248026.4A
Other languages
Chinese (zh)
Other versions
CN113891053B (en
Inventor
胡震宇
吕思成
张子祺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Huole Science and Technology Development Co Ltd
Original Assignee
Shenzhen Huole Science and Technology Development Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Huole Science and Technology Development Co Ltd filed Critical Shenzhen Huole Science and Technology Development Co Ltd
Priority to CN202111248026.4A priority Critical patent/CN113891053B/en
Publication of CN113891053A publication Critical patent/CN113891053A/en
Application granted granted Critical
Publication of CN113891053B publication Critical patent/CN113891053B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

The disclosure relates to a projection device control method, a projection device control apparatus, a medium and an electronic device. The method comprises the following steps: in response to receiving a projection instruction, acquiring a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before projection of the projection equipment on the projection surface; controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the projected light and ambient light through the projection surface during each projection, wherein the second color value comprises the characteristics of a projection light source, the projection surface and the ambient light; determining a gain coefficient of the RGB channel according to the first color value and each second color value; and adjusting the gain of the RGB channel according to the gain coefficient. Therefore, the gain coefficients of the RGB channels can be accurately calculated, and accurate compensation of the color temperature of the projection light source is achieved. Therefore, no matter how the ambient light and the projection surface are changed, the color temperature of the projection picture is always kept in a preset value or range, and the best impression experience is provided for a user.

Description

Projection equipment control method, device, medium and electronic equipment
The present application is a divisional application of the chinese patent application entitled "projection device control method, apparatus, medium, and electronic device" filed on 23/12/2020, application No. 202011556302.9.
Technical Field
The present disclosure relates to the field of projection devices, and in particular, to a projection device control method, apparatus, medium, and electronic device.
Background
The projection equipment displays the picture to a user through a diffuse reflection principle, wherein ambient light can form diffuse reflection on a projection plane and enter human eyes together with the diffuse reflection light of the light projected by the projection equipment, so that the color temperature of the displayed picture is influenced. In addition, when a user uses the projection apparatus, the user usually projects a picture on a wall surface or a curtain, and the wall surface or the curtain has various materials, microstructures and colors, which affect the absorption rate and the reflectivity of light with different wavelengths, thereby affecting the color temperature of the picture. Therefore, the influence of the ambient light and the projection plane on the viewing experience is very large, and therefore, how to adaptively adjust the color temperature of the projection equipment according to the current ambient condition plays an important role in improving the viewing experience of the user.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a projection device control method, apparatus, medium, and electronic device.
In order to achieve the above object, in a first aspect, the present disclosure provides a projection apparatus control method, including:
in response to receiving a projection instruction, acquiring a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before the projection equipment projects the ambient light on the projection surface;
controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and the ambient light on the projection surface during each projection, wherein the second color value of each second diffuse reflection light not only comprises the characteristics of a projection light source of the projection equipment, but also comprises the characteristics of the projection surface and the ambient light;
determining a gain coefficient of an RGB channel in the projection equipment according to the first color value and each second color value;
and adjusting the gain of the RGB channel according to the gain coefficient.
Optionally, the determining a gain coefficient of an RGB channel in the projection device according to the first color value and each of the second color values includes:
for each of the second color values, subtracting the first color value from the second color value to obtain a third color value;
according to the first color value and each third color value, constructing a target color lookup table and determining a first chromaticity coordinate of a projection light source of the projection equipment;
and determining the gain coefficient according to the first chromaticity coordinate and the target color lookup table.
Optionally, the constructing a target color lookup table according to the first color value and each of the third color values includes:
constructing an intermediate color lookup table according to each third color value;
and correcting the intermediate color lookup table according to the first color value to obtain the target color lookup table.
Optionally, the determining, according to the first color value and each third color value, a first chromaticity coordinate of a projection light source of the projection apparatus includes:
determining the correlated color temperature of target diffuse reflection light according to each third color value, wherein the target diffuse reflection light is obtained by superposing all the second diffuse reflection light;
and determining the first chromaticity coordinate according to the correlated color temperature.
Optionally, the determining the correlated color temperature of the target diffuse reflection light according to each of the third color values includes:
determining a fourth color value of the target diffuse reflection light according to each third color value;
determining a second chromaticity coordinate of the target diffuse reflection light in an XYZ color space according to the fourth color value;
and determining the correlated color temperature of the target diffuse reflection light according to the second chromaticity coordinate.
Optionally, the determining the first chromaticity coordinate according to the correlated color temperature includes:
determining a target color temperature of the projection light source corresponding to a preset correlated color temperature according to a corresponding relation between the preset correlated color temperature and the color temperature of the projection light source;
and determining the coordinates of the intersection point of the black body locus in the XYZ color space and the isotherm of the target color temperature as the first chromaticity coordinates.
Optionally, before the step of determining gain coefficients of RGB channels in the projection device according to the first color values and each of the second color values, the method further comprises:
infrared spectrum information of the first diffuse reflection light and the second diffuse reflection light is respectively obtained;
correcting the first color value according to the infrared spectrum information of the first diffuse reflection light, and correcting the second color value of each second diffuse reflection light according to the infrared spectrum information of the second diffuse reflection light;
determining a gain coefficient of an RGB channel in the projection device according to the first color value and each of the second color values, including:
and determining the gain coefficient of the RGB channel in the projection equipment according to the corrected first color value and each corrected second color value.
Optionally, the correcting the first color value according to the infrared spectrum information of the first diffuse reflection light includes:
acquiring a first correction matrix and a second correction matrix, wherein the first correction matrix is determined according to a measurement result under a standard light source with an infrared component larger than a first preset proportion threshold value, the second correction matrix is determined according to a measurement result under a standard light source with an infrared component smaller than a second preset proportion threshold value, and the first preset proportion threshold value is larger than the second preset proportion threshold value;
and determining the corrected first color value according to the product of the first correction matrix and a matrix to be corrected and the product of the second correction matrix and the matrix to be corrected, wherein the matrix to be corrected is a column vector formed by the first color value and infrared spectrum information of the first diffuse reflection light.
In a second aspect, the present disclosure provides a projection device control apparatus, the apparatus comprising:
the acquisition module is used for responding to a received projection instruction and acquiring a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before the projection equipment projects the ambient light on the projection surface;
the control module is used for controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and the ambient light through the projection surface during each projection, wherein the second color value of each second diffuse reflection light not only comprises the characteristics of a projection light source of the projection equipment, but also comprises the characteristics of the projection surface and the ambient light;
the determining module is configured to determine a gain coefficient of an RGB channel in the projection device according to the first color value obtained by the obtaining module and each of the second color values obtained by the control module;
and the adjusting module is used for adjusting the gain of the RGB channel according to the gain coefficient determined by the determining module.
In a third aspect, the present disclosure provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method provided by the first aspect of the present disclosure.
In a fourth aspect, the present disclosure provides an electronic device comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method provided by the first aspect of the present disclosure.
In the technical scheme, when a projection instruction is received, a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before projection of projection equipment on the projection surface is acquired; then, controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and ambient light through the projection surface during each projection; and then, determining a gain coefficient of an RGB channel in the projection equipment according to the first color value and each second color value, and adjusting the gain of the RGB channel according to the gain coefficient. The first color value of the first diffuse reflection light of the projection surface comprises the characteristics of the projection surface and the ambient light, and the second color value of each second diffuse reflection light of the projection surface comprises not only the characteristics of the projection light source of the projection equipment, but also the characteristics of the projection surface and the ambient light. Therefore, no matter how the ambient light and the projection surface are changed, the color temperature of the projection picture is always kept within a preset value or range, and therefore the optimal impression experience is provided for users.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a flowchart illustrating a method of controlling a projection apparatus according to an exemplary embodiment.
Fig. 2 is a flow chart illustrating a method of determining a gain factor according to an exemplary embodiment.
FIG. 3 is an xy-coordinate diagram of a CIE1931 shown in accordance with an exemplary embodiment.
Fig. 4 is a graph illustrating a correlation color temperature versus a target color temperature according to an exemplary embodiment.
Fig. 5 is a partially enlarged view of the CIE1931 coordinate diagram shown in fig. 3.
Fig. 6 is a flowchart illustrating a method of controlling a projection apparatus according to another exemplary embodiment.
FIG. 7A is a graph illustrating intensity of an infrared light ray versus a weighting factor, according to an exemplary embodiment.
FIG. 7B is a graph illustrating intensity of an infrared ray versus a weighting factor in accordance with another exemplary embodiment.
Fig. 8 is a block diagram illustrating a control apparatus of a projection device according to an exemplary embodiment.
FIG. 9 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
As discussed in the background, how to adaptively adjust the color temperature of the projection device according to the current environmental conditions plays an important role in improving the user experience. For this reason, the adaptive adjustment of the color temperature of the projection device is mainly realized in the following two ways: (1) the projection light source of the projection equipment is changed according to the ambient light to compensate the color temperature deviation (namely, color deviation), but the characteristics of a projection surface and the projection light source are not considered in the method, so that the problems of over compensation or under compensation easily occur; (2) although the color temperature accuracy of the light source can be accurately controlled by the method, the color temperature compensation cannot be performed on the color cast caused by the ambient light and the projection surface. In view of the above, the present disclosure provides a projection device control method, apparatus, medium, and electronic device.
Fig. 1 is a flowchart illustrating a method of controlling a projection apparatus according to an exemplary embodiment. As shown in fig. 1, the method includes S101 to S104.
In S101, in response to receiving the projection instruction, a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on the projection surface before the projection device projects the ambient light on the projection surface is acquired.
In the present disclosure, the projection surface may be a wall surface or a curtain made of various materials, and the color of the projection surface may be various colors such as white, pink, and gray. The first color value may be RGB data or XYZ data in an XYZ color space. The XYZ color space is defined by the International lighting association (CIE) in 1931, and is also called CIE 1931.
Before the projection equipment projects the light to the projection surface, after the ambient light irradiates the projection surface, the diffuse reflection occurs, therefore, the first diffuse reflection light of the projection surface is the light formed by the diffuse reflection of the ambient light through the projection surface, and thus, the first color value of the first diffuse reflection light simultaneously contains the characteristics of the projection surface and the ambient light.
In S102, the projection device is controlled to respectively project the pure red light, the pure green light, and the pure blue light to the projection surface according to any sequence, and a second color value of a second diffuse reflection light formed by diffuse reflection of the light projected by the projection device and the ambient light through the projection surface is obtained during each projection.
In the present disclosure, the second color value may be RGB data or XYZ data in an XYZ color space. After the light projected by the projection equipment is projected onto the projection surface, diffuse reflection can occur, and meanwhile, after the ambient light irradiates the projection surface, diffuse reflection can also occur, so that the second diffuse reflection light of the projection surface is formed by the diffuse reflection of the light projected by the projection equipment and the ambient light on the projection surface, and thus, the second color value of each second diffuse reflection light not only contains the characteristics of the projection light source of the projection equipment, but also contains the characteristics of the projection surface and the ambient light.
In addition, the first diffuse reflection light and each second diffuse reflection light can be collected through a sensing module facing the projection surface, wherein the sensing module can be a color temperature sensor, a camera and the like, and the sensing module can be integrated in the projection equipment or can be independent of the projection equipment and connected with the projection equipment through a wireless network or a wired network.
In addition, it should be noted that the projection device may respectively project pure red light, pure green light, and pure blue light to the projection plane in any order as long as the corresponding second color value can be obtained. For example, the projection device may be controlled to project pure red light, pure green light, and pure blue light to the projection plane in sequence; for another example, the projection device may be controlled to project pure red light, pure blue light, and pure green light onto the projection surface in sequence.
In S103, a gain factor for the RGB channel in the projection device is determined based on the first color value and each of the second color values.
In the present disclosure, the RGB channels include a red (R) channel, a green (G) channel, and a blue (B) channel, so that a gain coefficient of the red (R) channel, a gain coefficient of the green (G) channel, and a gain coefficient of the blue (B) channel can be determined according to the first color value and each of the second color values.
In S104, the gain of the RGB channel is adjusted according to the gain coefficient.
In the present disclosure, when the gain coefficient of the red (R) channel, the gain coefficient of the green (G) channel, and the gain coefficient of the blue (B) channel are determined through S103, the gain of the red (R) channel in the projection apparatus may be adjusted according to the gain coefficient of the red (R) channel, the gain of the green (G) channel in the projection apparatus may be adjusted according to the gain coefficient of the green (G) channel, and the gain of the blue (B) channel in the projection apparatus may be adjusted according to the gain coefficient of the blue (B) channel.
In the technical scheme, when a projection instruction is received, a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before projection of projection equipment on the projection surface is acquired; then, controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and ambient light through the projection surface during each projection; and then, determining a gain coefficient of an RGB channel in the projection equipment according to the first color value and each second color value, and adjusting the gain of the RGB channel according to the gain coefficient. The first color value of the first diffuse reflection light of the projection surface comprises the characteristics of the projection surface and the ambient light, and the second color value of each second diffuse reflection light of the projection surface comprises not only the characteristics of the projection light source of the projection equipment, but also the characteristics of the projection surface and the ambient light. Therefore, no matter how the ambient light and the projection surface are changed, the color temperature of the projection picture is always kept within a preset value or range, and therefore the optimal impression experience is provided for users.
The following describes a specific embodiment of determining the gain coefficients of the RGB channels in the projection apparatus according to the first color values and each of the second color values in S103. Specifically, it can be realized by S1031 to S1033 shown in fig. 2.
In S1031, for each second color value, the first color value is subtracted from the second color value to obtain a third color value.
In the present disclosure, for each second color value, the first color value is subtracted from the second color value to filter the environmental characteristic from the second color value, so as to avoid the influence of the environmental light on the Gamma (Gamma) characteristic of the projection light source of the projection device.
For example, the third color value may be obtained by the following equations (1) to (3):
Figure BDA0003321762650000091
Figure BDA0003321762650000092
Figure BDA0003321762650000093
wherein, X'R(N)、Y′R(N)、Z′R(N) X data, Y data and Z data in a third color value obtained by subtracting the first color value from a second color value of second diffuse reflection light formed by diffuse reflection of the pure red light and the ambient light projected by the projection equipment through the projection surface; x'G(N)、Y′G(N)、Z′G(N) X data, Y data and Z data in a third color value obtained by subtracting the first color value from a second color value of second diffuse reflection light formed by diffuse reflection of the pure green light and the ambient light projected by the projection equipment through the projection surface; x'B(N)、Y′B(N)、Z′B(N) X data, Y data and Z data in a third color value obtained by subtracting the first color value from a second color value of second diffuse reflection light formed by diffuse reflection of the pure blue light and the ambient light projected by the projection equipment through the projection surface; xR、YR、ZRThe data acquisition module is used for respectively acquiring X data, Y data and Z data in a second color value of second diffuse reflection light formed by diffuse reflection of pure red light and ambient light projected by the projection equipment through the projection surface; xG、YG、ZGThe data acquisition unit is used for acquiring X data, Y data and Z data in a second color value of second diffuse reflection light formed by diffuse reflection of pure green light and ambient light projected by the projection equipment through the projection surface; xB、YB、ZBThe data acquisition module is used for respectively acquiring X data, Y data and Z data in a second color value of second diffuse reflection light formed by diffuse reflection of pure blue light and ambient light projected by the projection equipment through the projection surface; xD、YD、ZDRespectively X data, Y data and Z data in the first color value; n is the maximum value of the data level value, e.g., 256, 1024, etc.
In S1032, a target color lookup table is constructed and first chromaticity coordinates of a projection light source of the projection device are determined according to the first color value and each third color value.
In S1033, a gain factor is determined based on the first chromaticity coordinates and the target color look-up table.
A detailed description will be given below of a specific embodiment of constructing the target color lookup table based on the first color value and each third color value in S1032.
Firstly, constructing an intermediate color lookup table according to each third color value; and then, correcting the intermediate color lookup table according to the first color value to obtain a target color lookup table.
Specifically, the three third color values obtained in S1031 are the color values at which the saturation is 100% (that is, the red X data X'R(N); red Y data Y'R(N); z data Z 'of red color'R(N); x data of Green color X'G(N); y data of Green color Y'G(N); z data Z 'of green color'G(N)(ii) a X data of blue color X'B(N); y data Y 'of blue color'B(N); z data Z 'of blue color'B(N))。
Since the brightness of the projection light source generally conforms to gamma2.2, the color values of the remaining saturation levels can be calculated based on gamma2.2, so that the intermediate color lookup table can be obtained.
For example, the color values of the remaining saturations can be calculated by the following equations (4) to (6):
Figure BDA0003321762650000101
Figure BDA0003321762650000102
Figure BDA0003321762650000111
wherein, X'R(IRE) intermediate color lookup tableRed X data with medium and saturation IRE/N, IRE being the data level value, and IRE being [0, N-1 ]]Any integer within the range; y'R(IRE) Y data for red color at IRE/N saturation in the intermediate color lookup table; z'R(IRE) Z data for red color at IRE/N saturation in the intermediate color lookup table; x'G(IRE) X data for green color with saturation IRE/N in the intermediate color lookup table; y'G(IRE) Y data for green color in the intermediate color lookup table with saturation IRE/N; z'G(IRE) Z data for green color in the intermediate color lookup table at IRE/N saturation; x'B(IRE) X data for blue color at IRE/N saturation in the intermediate color lookup table; y'B(IRE) Y data for blue color of saturation IRE/N in the intermediate color lookup table; z'B(IRE) is the Z data for blue color at IRE/N saturation in the intermediate color lookup table.
Illustratively, N — 1024, the medium color lookup table obtained by the above method is shown in table 1 below:
TABLE 1 intermediate color lookup table
IRE X′R Y′R Z′R X′G Y′G Z′G X′B Y′B Z′B
0 X′R(0) Y′R(0) Z′R(0) X′G(0) Y′G(0) Z′G(0) X′B(0) Y′B(0) Z′B(0)
1 x′R(1) Y′R(1) Z′R(1) X′G(1) Y′G(1) Z′G(1) X′B(1) Y′B(1) Z′B(1)
2 …… …… …… …… …… …… …… …… ……
3 …… …… …… …… …… …… …… …… ……
…… …… …… …… …… …… …… …… …… ……
…… …… …… …… …… …… …… …… …… ……
1021 …… …… …… …… …… …… …… …… ……
1022 …… …… …… …… …… …… …… …… ……
1023 X′R(1023) Y′R(1023) Z′R(1023) X′G(1023) Y′G(1023) Z′G(1023) X′B(1023) Y′B(1023) Z′B(1023)
1024 X′R(1024) Y′R(1024) Z′R(1024) X′G(1024) Y′G(1024) z′G(1024) X′B(1024) Y′B(1024) Z′B(1024)
In addition, if the luminance of the projection light source does not meet gamma2.2, the projection device needs to be controlled to respectively project 90% white light, 80% white light, … …, and 10% white light to the projection surface according to any sequence, the sensing module measures a fifth color value of the projection light source of the projection device during each projection, and then the intermediate color lookup table is obtained through linear interpolation according to the third color values and the fifth color values. The specific way of obtaining the color lookup table by using a linear difference is well known to those skilled in the art, and is not described in detail in this disclosure.
After the intermediate color lookup table is obtained in the above manner, the intermediate color lookup table is corrected according to the first color value, so as to obtain a target color lookup table.
For example, the respective color values in the target color lookup table can be calculated by the following equations (7) to (9):
Figure BDA0003321762650000121
Figure BDA0003321762650000122
Figure BDA0003321762650000123
wherein, X'R1(IRE) is X data for red color with saturation IRE/N in the target color lookup table, IRE is a data level value, and IRE is [0, N]Any integer within the range; y'R1(IRE) red Y data in the target color lookup table with saturation IRE/N; z'R1(IRE) Z data for red color at IRE/N saturation in the target color look-up table; x'G1(IRE) X data for green color with saturation IRE/N in the target color lookup table; y'G1(IRE) Y data for green color with saturation IRE/N in the target color lookup table; z'G1(IRE) Z data for green color in the target color look-up table with saturation IRE/N; x'B1(IRE) X data for blue color at IRE/N saturation in the target color look-up table; y'B1(IRE) Y data for blue color of saturation IRE/N in the target color lookup table; z'B1(IRE) is the Z data for blue color at IRE/N saturation in the target color look-up table.
A detailed description will be given below of a specific embodiment of determining the first chromaticity coordinate of the projection light source of the projection device according to the first color value and each third color value in S1032. Specifically, firstly, the correlated color temperature of target diffuse reflection light is determined according to each third color value, wherein the target diffuse reflection light is light obtained by superposing all second diffuse reflection light; then, a first chromaticity coordinate is determined according to the correlated color temperature.
The following is a detailed description of the above-described specific embodiment of determining the correlated color temperature of the target diffuse reflection light from each third color value. Specifically, the correlated color temperature can be determined by the following steps 1) to 3).
1) And determining a fourth color value of the target diffuse reflection light according to each third color value.
For example, the fourth color value of the target diffuse reflected light may be determined from each third color value by the following equation (10):
Figure BDA0003321762650000131
wherein X is X data in the fourth color value; y is Y data in the fourth color value; and Z is Z data in the fourth color value.
2) And determining a second chromaticity coordinate of the target diffuse reflection light in an XYZ color space according to the fourth color value.
In the present disclosure, according to the fourth color value, the second chromaticity coordinate of the target diffuse reflection light in the XYZ color space is determined, that is, the coordinate of the target diffuse reflection light in the xy coordinate diagram of CIE1931 (as shown in fig. 3) is determined, wherein all colors in the xy coordinate diagram of CIE1931 can be represented by x and y coordinates in the coordinate system. The black thick line in fig. 3 is a black body trace, and can be understood as a white trace at different color temperatures. The color temperature on the black body trajectory line is a standard color temperature, a line intersecting the black body trajectory line is an isotherm, wherein each color on the isotherm is the same color temperature, and the other color temperatures are correlated color temperatures except the color temperature on the black body trajectory line which is the standard color temperature. The farther from the black body locus line, the larger the color temperature value is, but the larger the color shift Δ uv, the more serious the color shift appears.
For example, the second chromaticity coordinate (x, y) may be determined from the fourth color value by the following equation (11):
Figure BDA0003321762650000141
3) and determining the correlated color temperature of the target diffuse reflection light according to the second chromaticity coordinate.
In the present disclosure, an actual light source is not always on the blackbody locus line, and therefore, a concept of Correlated Color Temperature (CCT) is proposed, in which the relative Color Temperature of the light source is represented by the Temperature having the shortest distance on the uniform chromaticity diagram, and also by the K's Temperature. Therefore, two beams of white light with the same color temperature may be one beam of white light which is green and one beam of white light which is purple, and the subjective feeling is only pure white on the black body locus line.
For example, the above correlated color temperature CCT may be determined by the following equation (12) according to the second chromaticity coordinate:
Figure BDA0003321762650000142
wherein a1, a2, a3 and c are all constants.
The following is a detailed description of the embodiment of determining the first chromaticity coordinate according to the correlated color temperature:
firstly, according to the preset corresponding relation between the correlated color temperature and the color temperature of the projection light source, the target color temperature of the projection light source corresponding to the correlated color temperature is determined.
For example, the correlation color temperature and the color temperature of the projection light source are shown in fig. 4, wherein the upper limit value and the lower limit value of the target color temperature can be set in a color temperature range with comfortable appearance, so as to narrow the difference between the target color temperature and the correlation color temperature and reduce the brightness loss.
Then, the coordinates of the intersection of the black body locus in the XYZ color space and the isotherm of the target color temperature, i.e., (u1, v1) shown in fig. 5, are determined as the first chromaticity coordinates.
The following describes in detail an embodiment of determining the gain factor according to the first chromaticity coordinate and the target color lookup table in S1033:
in the present disclosure, IRE may be usedR、IREG、IREBIn any combination (wherein IRERFor data level values corresponding to red, IRERIs [0, N ]]Any value within the range; IREGData level value for green, IREGIs [0, N ]]Any value within the range; IREBIs a blue pairCorresponding data level value, IREBIs [0, N ]]Arbitrary value within the range), respectively, into the following equation (13), find such that (x)w，yw) IRE with minimum distance to target chromaticity coordinateR、IREG、IREBIRE is used hereRmin、IREGmin、IREBminIndicating, then, IRERmindetermining/N as the gain factor for the red channel, IREGmindetermining/N as a green channel gain factor, IREBminthe/N is determined as the gain factor for the blue channel.
Figure BDA0003321762650000151
In addition, the first diffuse reflection light and each second diffuse reflection light collected by the sensing module facing the projection surface not only contain color values, but also include infrared spectrum information, when the sensing module is irradiated by infrared light, the sensing module responds within 700nm of the wavelength of the infrared light, and especially when the color value excitation is low and the infrared light excitation is high, the measuring precision of the sensing module on the color values is greatly influenced. Therefore, the sensing module can be provided with an infrared channel for collecting infrared spectrum information so as to assist in improving the measurement accuracy of the color value. Specifically, as shown in fig. 6, before S103, the method further includes S105 to S107.
In S105, infrared spectral information of the first diffuse reflected light is acquired.
In S106, infrared spectral information of each second diffuse reflected light is acquired.
In S107, the first color value is corrected based on the infrared spectrum information of the first diffuse reflection light, and the second color value of the second diffuse reflection light is corrected based on the infrared spectrum information of the second diffuse reflection light for each second diffuse reflection light.
In the disclosure, when a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface is obtained, infrared spectrum information of the first diffuse reflection light can also be obtained simultaneously; after the projection device is controlled to project light to the projection surface each time, in addition to acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection device and ambient light on the projection surface each time of projection, infrared spectrum information of the second diffuse reflection light also needs to be acquired simultaneously. And then, correcting the first color value according to the infrared spectrum information of the first diffuse reflection light, and correcting the second color value of each second diffuse reflection light according to the infrared spectrum information of the second diffuse reflection light. Thus, in step S103, the gain coefficients of the RGB channels in the projection apparatus can be determined according to the corrected first color value and each corrected second color value.
A specific embodiment of correcting the first color value based on the infrared spectrum information of the first diffuse reflected light will be described in detail below. In the present disclosure, the first color value may be corrected in various ways according to infrared spectrum information of the first diffuse reflection light. In one embodiment, a third correction matrix may be obtained, wherein the third correction matrix is determined according to the measurement result of a single standard light source; and then, determining the first color value obtained after correction according to the product of the third correction matrix and the matrix to be corrected, wherein the matrix to be corrected is a column vector formed by the first color value and infrared spectrum information of the first diffuse reflection light.
For example, the corrected first color value may be determined by the following equation (14) according to the product of the third correction matrix and the matrix to be corrected:
Figure BDA0003321762650000161
wherein,
Figure BDA0003321762650000162
is the corrected first color value;
Figure BDA0003321762650000163
is a matrix to be corrected, wherein IR is infrared spectrum information of the first diffuse reflection light,
Figure BDA0003321762650000164
the first color value;
Figure BDA0003321762650000165
is a third calibration matrix.
The following describes in detail how to determine the third correction matrix.
Specifically, the projection device is controlled to project a standard light source (e.g., any one of D50, D65, TL83, TL84, etc.) to the projection surface; then, acquiring a color value and infrared spectrum information of diffuse reflection light formed by diffuse reflection of the standard light source and ambient light through the projection surface through a sensing module, and measuring the color value of the standard light source projected by the projection surface through standard instruments such as an illuminometer, an integrating sphere and the like; according to the mode, multiple measurements are carried out under different ambient lights, wherein the light sources projected to the projection surface by the projection equipment at each time are consistent, and then fitting is carried out according to the color values and infrared spectrum information of multiple groups of diffuse reflection light measured by the sensing module and the color values of multiple groups of standard light sources measured by the standard instrument to obtain the third calibration matrix.
Illustratively, the color values and infrared spectral information of the sets of diffuse reflected light measured by the sensing module, and the color values of the sets of standard light sources measured by the standard instrument are shown in table 2 below:
TABLE 2 measurement data sheet of sensing module and standard instrument
Figure BDA0003321762650000171
Fitting is performed according to the measurement data of the sensing module and the measurement data of the standard instrument in the above table 2, so as to obtain a third calibration matrix
Figure BDA0003321762650000172
In another embodiment, a first correction matrix and a second correction matrix may be obtained, where the first correction matrix is determined according to the measurement result of a standard illuminant (i.e., an illuminant with a high infrared component) whose infrared component is greater than a first preset proportion threshold, and the second correction matrix is determined according to the measurement result of a standard illuminant (i.e., an illuminant with a low infrared component) whose infrared component is less than a second preset proportion threshold, where the first preset proportion threshold is greater than the second preset proportion threshold; and then, determining the first color value obtained after correction according to the product of the first correction matrix and the matrix to be corrected and the product of the second correction matrix and the matrix to be corrected.
For example, the corrected first color value may be determined by the following equation (15) according to the product of the first correction matrix and the matrix to be corrected and the product of the second correction matrix and the matrix to be corrected:
Figure BDA0003321762650000181
wherein,
Figure BDA0003321762650000182
a second calibration matrix;
Figure BDA0003321762650000183
is a first correction matrix; weight is a weight coefficient.
Here, the weight coefficient weight may be determined according to the intensity of the infrared ray, and may be determined by a relationship curve between the intensity of the infrared ray and the weight coefficient as shown in fig. 7A or fig. 7B, for example.
The following describes in detail how to determine the first correction matrix.
Specifically, for each standard light source with the infrared component larger than a first preset proportion threshold value, the projection equipment is respectively controlled to project the standard light source to the projection surface; then, acquiring a color value and infrared spectrum information of diffuse reflection light formed by diffuse reflection of the standard light source and ambient light through the projection surface through a sensing module, and measuring the color value of the standard light source projected by the projection surface through standard instruments such as an illuminometer, an integrating sphere and the like; according to the mode, multiple measurements are carried out under different ambient lights, and then fitting is carried out according to the color values and infrared spectrum information of multiple groups of diffuse reflection light measured by the sensing module and the color values of multiple groups of standard light sources with different infrared components larger than a first preset proportion threshold value measured by a standard instrument, so that the first calibration matrix is obtained.
The following describes in detail how to determine the second correction matrix.
Specifically, for each standard light source with the infrared component smaller than a second preset proportion threshold, the projection equipment is respectively controlled to project the standard light source to the projection surface; then, acquiring the color value and infrared spectrum information of diffuse reflection light formed by diffuse reflection of the standard light source and ambient light through the projection surface through a sensing module, and measuring the color value of the standard light source projected by the projection surface through a standard instrument; according to the mode, multiple measurements are carried out under different ambient lights, and then fitting is carried out according to the color values and infrared spectrum information of multiple groups of diffuse reflection light measured by the sensing module and the color values of the standard light source, measured by the standard instrument, of multiple groups of different infrared components smaller than a second preset proportion threshold value, so that the second calibration matrix is obtained.
The first calibration matrix, the second calibration matrix and the third calibration matrix may be predetermined and stored in a corresponding storage module in the projection device, so that the projection device can acquire the first calibration matrix and the second calibration matrix or acquire the third calibration matrix by accessing the storage module, which is convenient and fast, thereby accelerating the efficiency of color temperature adjustment.
In addition, except for the mode of correcting the first color value according to the infrared spectrum information of the first diffuse reflection light, the measuring precision of the first color value can be improved by arranging the optical element for filtering infrared light on the sensing module.
Since the specific manner of correcting the second color value of the second diffuse reflected light is the same as the manner of correcting the first color value, details are not described in the present disclosure.
Based on the same inventive concept, the disclosure also provides a projection device control device. Fig. 8 is a block diagram illustrating a control apparatus of a projection device according to an exemplary embodiment. As shown in fig. 8, the apparatus 800 includes: an obtaining module 801, configured to, in response to receiving a projection instruction, obtain a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before the projection device projects the ambient light onto the projection surface; the control module 802 is configured to control the projection device to respectively project pure red light, pure green light, and pure blue light to the projection surface according to any order, and obtain a second color value of a second diffuse reflection light formed by diffuse reflection of the light projected by the projection device and the ambient light through the projection surface during each projection; a determining module 803, configured to determine a gain coefficient of an RGB channel in the projection apparatus according to the first color value obtained by the obtaining module 801 and each of the second color values obtained by the control module 803; an adjusting module 804, configured to adjust the gain of the RGB channel according to the gain coefficient determined by the determining module 803.
In the technical scheme, when a projection instruction is received, a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before projection of projection equipment on the projection surface is acquired; then, controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and ambient light through the projection surface during each projection; and then, determining a gain coefficient of an RGB channel in the projection equipment according to the first color value and each second color value, and adjusting the gain of the RGB channel according to the gain coefficient. The first color value of the first diffuse reflection light of the projection surface comprises the characteristics of the projection surface and the ambient light, and the second color value of each second diffuse reflection light of the projection surface comprises not only the characteristics of the projection light source of the projection equipment, but also the characteristics of the projection surface and the ambient light. Therefore, no matter how the ambient light and the projection surface are changed, the color temperature of the projection picture is always kept within a preset value or range, and therefore the optimal impression experience is provided for users.
Optionally, the determining module 803 includes: the filtering submodule is used for subtracting the first color value from the second color value according to each second color value to obtain a third color value; the target building submodule is used for building a target color lookup table and determining a first chromaticity coordinate of a projection light source of the projection equipment according to the first color value and each third color value; and the first determining submodule is used for determining the gain coefficient according to the first chromaticity coordinate and the target color lookup table.
Optionally, the target construction submodule includes: the middle constructing submodule is used for constructing a middle color lookup table according to each third color value; and the correction submodule is used for correcting the intermediate color lookup table according to the first color value to obtain the target color lookup table.
Optionally, the target building submodule further includes: the second determining submodule is used for determining the correlated color temperature of target diffuse reflection light according to each third color value, wherein the target diffuse reflection light is obtained by superposing all the second diffuse reflection light; and the third determining submodule is used for determining the first chromaticity coordinate according to the correlated color temperature.
Optionally, the second determining sub-module includes: a fourth color value determination submodule configured to determine a fourth color value of the target diffuse reflection light according to each of the third color values; a second chromaticity coordinate determination submodule for determining a second chromaticity coordinate of the target diffuse reflection light in an XYZ color space, according to the fourth color value; and the correlated color temperature determining submodule is used for determining the correlated color temperature of the target diffuse reflection light according to the second chromaticity coordinate.
Optionally, the third determining sub-module includes: the target color temperature determining submodule is used for determining the target color temperature of the projection light source corresponding to the correlated color temperature according to the corresponding relation between the preset correlated color temperature and the color temperature of the projection light source; and the first chromaticity coordinate determination submodule is used for determining the coordinates of the intersection point of the black body locus in the XYZ color space and the isotherm of the target color temperature as the first chromaticity coordinates.
Optionally, the apparatus 800 further comprises: an infrared spectrum information obtaining module, configured to obtain infrared spectrum information of the first diffuse reflection light and infrared spectrum information of each second diffuse reflection light before the determining module 803 determines a gain coefficient of an RGB channel in the projection device according to the first color value and each second color value; the correction module is used for correcting the first color value according to the infrared spectrum information of the first diffuse reflection light and correcting the second color value of the second diffuse reflection light according to the infrared spectrum information of the second diffuse reflection light aiming at each second diffuse reflection light; the determining module 803 is configured to determine a gain factor of an RGB channel in the projection apparatus according to the corrected first color value and each corrected second color value.
Optionally, the correction module comprises: the acquisition submodule is used for acquiring a first correction matrix and a second correction matrix, wherein the first correction matrix is determined according to the measurement result under the standard light source with the infrared component larger than a first preset proportion threshold value, the second correction matrix is determined according to the measurement result under the standard light source with the infrared component smaller than a second preset proportion threshold value, and the first preset proportion threshold value is larger than the second preset proportion threshold value; and a fourth determining module, configured to determine the corrected first color value according to a product of the first correction matrix and a matrix to be corrected, and a product of the second correction matrix and the matrix to be corrected, where the matrix to be corrected is a column vector formed by the first color value and infrared spectrum information of the first diffuse reflection light.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The present disclosure also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described projection apparatus control method provided by the present disclosure.
Fig. 9 is a block diagram illustrating an electronic device 900 in accordance with an example embodiment. As shown in fig. 9, the electronic device 900 may include: a processor 901 and a memory 902. The electronic device 900 may also include one or more of a multimedia component 903, an input/output (I/O) interface 904, and a communications component 905.
The processor 901 is configured to control the overall operation of the electronic device 900, so as to complete all or part of the steps in the above-mentioned projection device control method. The memory 902 is used to store various types of data to support operation of the electronic device 900, such as instructions for any application or method operating on the electronic device 900 and application-related data, such as contact data, transmitted and received messages, pictures, audio, video, and the like. The Memory 902 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 903 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 902 or transmitted through the communication component 905. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 904 provides an interface between the processor 901 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 905 is used for wired or wireless communication between the electronic device 900 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 905 may thus include: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described projection Device control method.
In another exemplary embodiment, there is also provided a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the projection apparatus control method described above. For example, the computer readable storage medium may be the above-mentioned memory 902 including program instructions that are executable by the processor 901 of the electronic device 900 to perform the above-mentioned projection device control method.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (11)

1. A method for controlling a projection device, the method comprising:
in response to receiving a projection instruction, acquiring a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before the projection equipment projects the ambient light on the projection surface;
controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and the ambient light on the projection surface during each projection, wherein the second color value of each second diffuse reflection light not only comprises the characteristics of a projection light source of the projection equipment, but also comprises the characteristics of the projection surface and the ambient light;
determining a gain coefficient of an RGB channel in the projection equipment according to the first color value and each second color value;
and adjusting the gain of the RGB channel according to the gain coefficient.
2. The method of claim 1, wherein determining gain coefficients for RGB channels in the projection device based on the first color values and each of the second color values comprises:
for each of the second color values, subtracting the first color value from the second color value to obtain a third color value;
according to the first color value and each third color value, constructing a target color lookup table and determining a first chromaticity coordinate of a projection light source of the projection equipment;
and determining the gain coefficient according to the first chromaticity coordinate and the target color lookup table.
3. The method of claim 2, wherein constructing a target color look-up table based on the first color values and each of the third color values comprises:
constructing an intermediate color lookup table according to each third color value;
and correcting the intermediate color lookup table according to the first color value to obtain the target color lookup table.
4. The method of claim 2, wherein determining the first chromaticity coordinate of the projection light source of the projection device based on the first color value and each of the third color values comprises:
determining the correlated color temperature of target diffuse reflection light according to each third color value, wherein the target diffuse reflection light is obtained by superposing all the second diffuse reflection light;
and determining the first chromaticity coordinate according to the correlated color temperature.
5. The method of claim 4, wherein determining the correlated color temperature of the target diffuse reflected light from each of the third color values comprises:
determining a fourth color value of the target diffuse reflection light according to each third color value;
determining a second chromaticity coordinate of the target diffuse reflection light in an XYZ color space according to the fourth color value;
and determining the correlated color temperature of the target diffuse reflection light according to the second chromaticity coordinate.
6. The method of claim 4, wherein determining the first chromaticity coordinate from the correlated color temperature comprises:
determining a target color temperature of the projection light source corresponding to a preset correlated color temperature according to a corresponding relation between the preset correlated color temperature and the color temperature of the projection light source;
and determining the coordinates of the intersection point of the black body locus in the XYZ color space and the isotherm of the target color temperature as the first chromaticity coordinates.
7. A method according to any of claims 1-6, characterized in that before the step of determining gain coefficients for RGB channels in the projection device on the basis of the first color values and each of the second color values, the method further comprises:
infrared spectrum information of the first diffuse reflection light and the second diffuse reflection light is respectively obtained;
correcting the first color value according to the infrared spectrum information of the first diffuse reflection light, and correcting the second color value of each second diffuse reflection light according to the infrared spectrum information of the second diffuse reflection light;
determining a gain coefficient of an RGB channel in the projection device according to the first color value and each of the second color values, including:
and determining the gain coefficient of the RGB channel in the projection equipment according to the corrected first color value and each corrected second color value.
8. The method of claim 7, wherein the correcting the first color value according to the infrared spectral information of the first diffuse reflected light comprises:
acquiring a first correction matrix and a second correction matrix, wherein the first correction matrix is determined according to a measurement result under a standard light source with an infrared component larger than a first preset proportion threshold value, the second correction matrix is determined according to a measurement result under a standard light source with an infrared component smaller than a second preset proportion threshold value, and the first preset proportion threshold value is larger than the second preset proportion threshold value;
and determining the corrected first color value according to the product of the first correction matrix and a matrix to be corrected and the product of the second correction matrix and the matrix to be corrected, wherein the matrix to be corrected is a column vector formed by the first color value and infrared spectrum information of the first diffuse reflection light.
9. A projection device control apparatus, comprising:
the acquisition module is used for responding to a received projection instruction and acquiring a first color value of first diffuse reflection light formed by diffuse reflection of ambient light on a projection surface before the projection equipment projects the ambient light on the projection surface;
the control module is used for controlling the projection equipment to respectively project pure red light, pure green light and pure blue light to the projection surface according to any sequence, and acquiring a second color value of second diffuse reflection light formed by diffuse reflection of the light projected by the projection equipment and the ambient light through the projection surface during each projection, wherein the second color value of each second diffuse reflection light not only comprises the characteristics of a projection light source of the projection equipment, but also comprises the characteristics of the projection surface and the ambient light;
the determining module is configured to determine a gain coefficient of an RGB channel in the projection device according to the first color value obtained by the obtaining module and each of the second color values obtained by the control module;
and the adjusting module is used for adjusting the gain of the RGB channel according to the gain coefficient determined by the determining module.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
11. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 8.
CN202111248026.4A 2020-12-23 2020-12-23 Projection equipment control method and device, medium and electronic equipment Active CN113891053B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111248026.4A CN113891053B (en) 2020-12-23 2020-12-23 Projection equipment control method and device, medium and electronic equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011556302.9A CN112738489B (en) 2020-12-23 2020-12-23 Projection equipment control method, device, medium and electronic equipment
CN202111248026.4A CN113891053B (en) 2020-12-23 2020-12-23 Projection equipment control method and device, medium and electronic equipment

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN202011556302.9A Division CN112738489B (en) 2020-12-23 2020-12-23 Projection equipment control method, device, medium and electronic equipment

Publications (2)

Publication Number Publication Date
CN113891053A true CN113891053A (en) 2022-01-04
CN113891053B CN113891053B (en) 2023-07-25

Family

ID=75615697

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202111248026.4A Active CN113891053B (en) 2020-12-23 2020-12-23 Projection equipment control method and device, medium and electronic equipment
CN202011556302.9A Active CN112738489B (en) 2020-12-23 2020-12-23 Projection equipment control method, device, medium and electronic equipment

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202011556302.9A Active CN112738489B (en) 2020-12-23 2020-12-23 Projection equipment control method, device, medium and electronic equipment

Country Status (1)

Country Link
CN (2) CN113891053B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113965739B (en) * 2020-12-23 2023-07-25 深圳市火乐科技发展有限公司 Projection equipment control method and device, medium and electronic equipment
CN113259645B (en) * 2021-06-08 2021-10-19 深圳市火乐科技发展有限公司 Color temperature adjusting method and device, computer readable storage medium and projection equipment
CN113873208B (en) * 2021-09-16 2023-07-25 峰米(北京)科技有限公司 Gamma curve adjusting method and equipment for projection equipment

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6043797A (en) * 1996-11-05 2000-03-28 Clarity Visual Systems, Inc. Color and luminance control system for liquid crystal projection displays
US20080137039A1 (en) * 2006-12-11 2008-06-12 Samsung Electronics Co., Ltd Apparatus and method for projecting image considering screen condition
CN101217674A (en) * 2007-01-04 2008-07-09 三星电子株式会社 Apparatus and method for ambient light adaptive color correction
US20090116106A1 (en) * 2007-11-06 2009-05-07 Bright View Technologies, Inc. Portable front projection screens
JP2009105679A (en) * 2007-10-23 2009-05-14 Canon Inc Image processing apparatus and method of controlling the same
US20110001881A1 (en) * 2009-07-01 2011-01-06 Canon Kabushiki Kaisha Image projection apparatus and method of controlling the same
CN101960379A (en) * 2008-03-04 2011-01-26 纳幕尔杜邦公司 Improved reflective projection screen
JP2011205199A (en) * 2010-03-24 2011-10-13 Seiko Epson Corp Image processing device, image display system, image processing method
US20130162814A1 (en) * 2011-12-26 2013-06-27 Electronics And Telecommunications Research Institute Projector image correction device and method
CN103702095A (en) * 2013-12-24 2014-04-02 北京淳中视讯科技有限公司 Color gamut correction method, device and system of image fusion process
CN103716503A (en) * 2012-09-28 2014-04-09 日立民用电子株式会社 Image processing apparatus and projector
US20170236005A1 (en) * 2016-02-12 2017-08-17 Safran Identity & Security Method for determining a colour value of an object in an image
US20180192012A1 (en) * 2015-06-30 2018-07-05 Yutou Technology (Hangzhou) Co., Ltd. Method for controlling projector and projector applicable to same
CN108600725A (en) * 2018-05-10 2018-09-28 杭州雄迈集成电路技术有限公司 A kind of white balance correction device and method based on RGB-IR image datas
JP2019201271A (en) * 2018-05-15 2019-11-21 キヤノン株式会社 Projection type display device
JP2019204017A (en) * 2018-05-24 2019-11-28 キヤノン株式会社 Color correction method of image projection device
CN110769229A (en) * 2019-07-10 2020-02-07 成都极米科技股份有限公司 Method, device and system for detecting color brightness of projection picture
CN110913194A (en) * 2019-11-22 2020-03-24 Oppo广东移动通信有限公司 Automatic white balance compensation method, terminal and computer storage medium

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3514257B2 (en) * 2002-05-20 2004-03-31 セイコーエプソン株式会社 Image processing system, projector, image processing method, program, and information storage medium
JP2008109328A (en) * 2006-10-25 2008-05-08 Infovision Optoelectronics Holdings Ltd Circuit and method for correcting color reproduction area
CN101815220B (en) * 2009-02-20 2011-08-10 华晶科技股份有限公司 Method for correcting image color distortion
JP2012248910A (en) * 2011-05-25 2012-12-13 Canon Inc Color correction method of projection display device
US9030575B2 (en) * 2011-10-12 2015-05-12 Apple Inc. Transformations and white point constraint solutions for a novel chromaticity space
CN106707674B (en) * 2015-11-17 2021-02-26 深圳光峰科技股份有限公司 Automatic focusing method of projection equipment and projection equipment
CN108282647B (en) * 2018-01-31 2019-11-05 上海小蚁科技有限公司 Color correcting method and device, computer readable storage medium, terminal
US10630948B2 (en) * 2018-09-26 2020-04-21 Christie Digital Systems Usa, Inc. Device, system and method for photometric compensation of images provided by a display device

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6043797A (en) * 1996-11-05 2000-03-28 Clarity Visual Systems, Inc. Color and luminance control system for liquid crystal projection displays
US20080137039A1 (en) * 2006-12-11 2008-06-12 Samsung Electronics Co., Ltd Apparatus and method for projecting image considering screen condition
CN101217674A (en) * 2007-01-04 2008-07-09 三星电子株式会社 Apparatus and method for ambient light adaptive color correction
JP2009105679A (en) * 2007-10-23 2009-05-14 Canon Inc Image processing apparatus and method of controlling the same
US20090116106A1 (en) * 2007-11-06 2009-05-07 Bright View Technologies, Inc. Portable front projection screens
CN101960379A (en) * 2008-03-04 2011-01-26 纳幕尔杜邦公司 Improved reflective projection screen
US20110001881A1 (en) * 2009-07-01 2011-01-06 Canon Kabushiki Kaisha Image projection apparatus and method of controlling the same
JP2011205199A (en) * 2010-03-24 2011-10-13 Seiko Epson Corp Image processing device, image display system, image processing method
US20130162814A1 (en) * 2011-12-26 2013-06-27 Electronics And Telecommunications Research Institute Projector image correction device and method
CN103716503A (en) * 2012-09-28 2014-04-09 日立民用电子株式会社 Image processing apparatus and projector
CN103702095A (en) * 2013-12-24 2014-04-02 北京淳中视讯科技有限公司 Color gamut correction method, device and system of image fusion process
US20180192012A1 (en) * 2015-06-30 2018-07-05 Yutou Technology (Hangzhou) Co., Ltd. Method for controlling projector and projector applicable to same
US20170236005A1 (en) * 2016-02-12 2017-08-17 Safran Identity & Security Method for determining a colour value of an object in an image
CN108600725A (en) * 2018-05-10 2018-09-28 杭州雄迈集成电路技术有限公司 A kind of white balance correction device and method based on RGB-IR image datas
JP2019201271A (en) * 2018-05-15 2019-11-21 キヤノン株式会社 Projection type display device
JP2019204017A (en) * 2018-05-24 2019-11-28 キヤノン株式会社 Color correction method of image projection device
CN110769229A (en) * 2019-07-10 2020-02-07 成都极米科技股份有限公司 Method, device and system for detecting color brightness of projection picture
CN110913194A (en) * 2019-11-22 2020-03-24 Oppo广东移动通信有限公司 Automatic white balance compensation method, terminal and computer storage medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张有录主编: "《大学现代教育技术教程》", 北京：中国铁道出版社, pages: 70 - 82 *

Also Published As

Publication number Publication date
CN113891053B (en) 2023-07-25
CN112738489B (en) 2021-12-07
CN112738489A (en) 2021-04-30

Similar Documents

Publication Publication Date Title
CN112738489B (en) Projection equipment control method, device, medium and electronic equipment
CN112738488B (en) Projection equipment control method, device, medium and electronic equipment
Berns Methods for characterizing CRT displays
EP1942680A2 (en) Apparatus and method for ambient light adaptive color correction
CN110913194B (en) Automatic white balance compensation method, terminal and computer storage medium
JP5430254B2 (en) Image display apparatus and control method thereof
JP2002027491A (en) Image input unit, white balance adjusting method, and computer readable recording medium storing program for executing the method
GB2430105A (en) Imaging device
JP2010249548A (en) Color measuring device and method, and liquid crystal display system
CN112565727B (en) Projection equipment control method, device, medium and electronic equipment
WO2022174651A1 (en) Projection device control method and apparatus, medium, and electronic device
Shin et al. Change of color appearance in photopic, mesopic and scotopic vision
CN112750171B (en) Color adjustment method, device, medium and electronic equipment
KR20160098540A (en) Creation device for color table, correction and control device for camera image and method thereof
US8284260B2 (en) Optimal raw RGB determination for color calibration
CN113542708B (en) Projection surface parameter confirmation method and device, storage medium and projection equipment
CN112738486B (en) Projection control method, device, system, medium and electronic equipment
CN113259645B (en) Color temperature adjusting method and device, computer readable storage medium and projection equipment
TW201917717A (en) Display and color correction method
CN109151457B (en) Image processing method and device, terminal and storage medium
JP6729578B2 (en) Optical characteristic measuring device and method for setting optical characteristic measuring device
TWI780634B (en) Image calibration method of image system
US20230260228A1 (en) Adaptive mixed reality
TWI771131B (en) Parameter adjusting method and projector
JPH10174017A (en) Television receiver and its color temperature control method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant