CN112004070A - Projection apparatus, white balance adjustment method thereof, and readable storage medium - Google Patents
Projection apparatus, white balance adjustment method thereof, and readable storage medium Download PDFInfo
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- CN112004070A CN112004070A CN202010605290.8A CN202010605290A CN112004070A CN 112004070 A CN112004070 A CN 112004070A CN 202010605290 A CN202010605290 A CN 202010605290A CN 112004070 A CN112004070 A CN 112004070A
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- white balance
- projection
- parameter
- balance parameter
- projection apparatus
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- 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]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
Abstract
The invention discloses a projection device, a white balance adjusting method thereof and a readable storage medium, wherein the white balance adjusting method of the projection device comprises the following steps: acquiring a background wall image; calculating a white balance parameter of the background wall according to the background wall image; adjusting the white balance parameter of the projection equipment according to the white balance parameter of the background wall so that the white balance parameter of a projection image projected on the background wall by the projection equipment is in a set value range; according to the technical scheme provided by the invention, the white balance parameters of the projection equipment are adjusted according to different backgrounds, so that the white balance parameters of the projection images projected on the background walls by the projection equipment are within a set value range, namely, the effects of the projection images can be ensured and the consistency can be kept on different background walls.
Description
Technical Field
The present invention relates to the field of projection devices, and in particular, to a projection device, a white balance adjustment method thereof, and a readable storage medium.
Background
In the current environment of projection equipment, many customers do not purchase a special screen for projection equipment, but directly project the screen on a wall, a ceiling, etc. In the use scenes of the customers, because the wall or the ceiling may not be pure white, the background color of the wall or the ceiling used by each customer is different, so that the effect projected by the projection equipment is different, and the best projection effect is not achieved or the effect is not expected by the customer.
Disclosure of Invention
The invention mainly aims to provide a projection device, a white balance adjusting method thereof and a readable storage medium, aiming at enabling different background walls to achieve ideal projection effects.
In order to achieve the above object, the present invention provides a white balance adjustment method for a projection apparatus, comprising the steps of:
acquiring a background wall image;
calculating a white balance parameter of the background wall according to the background wall image;
and adjusting the white balance parameter of the projection equipment according to the white balance parameter of the background wall so that the white balance parameter of the projection image projected on the background wall by the projection equipment is in a set value range.
Further, the step of adjusting the white balance parameter of the projection device according to the white balance parameter of the background wall includes:
calculating to obtain an approximate white balance parameter of the projection equipment according to the white balance parameter of the background wall;
selecting a primary white balance parameter adapted to the ideal white balance parameter from preset white balance parameters of a projection device so that a difference value between the ideal white balance parameter and the primary white balance parameter is within a first set value;
starting the projection equipment to project to the background wall according to the primarily selected white balance parameters;
acquiring a projected image in real time, and calculating a white balance parameter of the projected image;
comparing a white balance parameter of the projected image with a user-desired white balance parameter;
when the difference value between the white balance parameter of the projected image and the white balance parameter desired by the user is out of the second set range, adjusting the electrical parameter of the projection equipment until the difference value between the actual white balance parameter and the ideal white balance parameter is within the second set value.
Further, before the step of comparing the white balance parameter of the projection image with the user's desired white balance parameter, the method further includes:
a user-selected user-desired white balance parameter is received.
Further, the user desired white balance parameter is set;
further, a plurality of preset white balance parameters of the projection equipment are provided, and the preset white balance parameters of the plurality of projection equipment are divided into a plurality of groups according to respective color temperatures.
Further, 240 preset white balance parameters of the projection equipment are set, and the RGB of the preset white balance parameters of the projection equipment are different;
the preset white balance parameters of the plurality of projection devices are divided into 3 groups according to respective color temperatures, and the preset white balance parameters of the first projection device, the preset white balance parameters of the second projection device and the preset white balance parameters of the third projection device are sequentially increased corresponding to the color temperatures.
Further, the step of calculating the white balance parameter of the background wall according to the background wall image includes:
uniformly selecting a plurality of areas on the background wall image;
and calculating the white balance parameter of the background wall according to the pixel values of the plurality of areas.
Further, the plurality of regions are regions on diagonal lines of the background.
The invention also discloses a readable storage medium storing a white balance adjustment program of a projection device, which is executable on a processor and is configured to implement the steps of the white balance adjustment method of the projection device as described in any one of the above.
The present invention also discloses a projection apparatus, comprising:
a projection apparatus main body having a lens for projecting an image; and the number of the first and second groups,
the control device is electrically connected with the projection equipment main body and comprises a memory, a processor and a white balance adjusting program of the projection equipment, wherein the white balance adjusting program of the projection equipment is stored on the memory and can run on the processor, and the white balance adjusting program of the projection equipment is configured to realize the steps of the white balance adjusting method of the projection equipment.
According to the technical scheme provided by the invention, the white balance parameters of the projection equipment are adjusted according to different backgrounds, so that the white balance parameters of the projection images projected on the background walls by the projection equipment are within a set value range, namely, the effects of the projection images can be ensured and the consistency can be kept on different background walls.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a control apparatus of a hardware operating environment involved in a white balance adjustment method of a projection device;
fig. 2 is a schematic flowchart of a white balance adjustment method for a projection apparatus according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a white balance adjustment method for a projection apparatus according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a projection device, which includes a projection device main body and a control device, and it should be noted that the "projection device" of the invention is a device with projection function, such as a common projector, and may also be a mobile phone with projection function, so the invention is not limited to the details of the projection device, the projection device main body includes a lens for projecting an image, and an optical processing module for converting an analog signal into a digital signal, obviously, the invention also includes some other components, which are mature technologies, and will not be described in detail herein.
Referring to fig. 1, the present invention provides a control device, wherein the control device is electrically connected to the projection apparatus main body. The control device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
In the control apparatus 3 shown in fig. 2, the processor 1001 calls the white balance adjustment program of the projection device stored in the memory 1005, and performs the following operations:
acquiring a background wall image;
calculating a white balance parameter of the background wall according to the background wall image;
and adjusting the white balance parameter of the projection equipment according to the white balance parameter of the background wall so that the white balance parameter of the projection image projected on the background wall by the projection equipment is in a set value range.
Further, the step of adjusting the white balance parameter of the projection device according to the white balance parameter of the background wall includes:
calculating to obtain an approximate white balance parameter of the projection equipment according to the white balance parameter of the background wall;
selecting a primary white balance parameter adapted to the ideal white balance parameter from preset white balance parameters of a projection device so that a difference value between the ideal white balance parameter and the primary white balance parameter is within a first set value;
starting the projection equipment to project to the background wall according to the primarily selected white balance parameters;
acquiring a projected image in real time, and calculating a white balance parameter of the projected image;
comparing a white balance parameter of the projected image with a user-desired white balance parameter;
when the difference value between the white balance parameter of the projected image and the white balance parameter desired by the user is out of the second set range, adjusting the electrical parameter of the projection equipment until the difference value between the actual white balance parameter and the ideal white balance parameter is within the second set value.
Further, before the step of comparing the white balance parameter of the projection image with the user's desired white balance parameter, the method further includes:
a user-selected user-desired white balance parameter is received.
Further, the user's desired white balance parameter is set to
Further, a plurality of preset white balance parameters of the projection equipment are provided, and the preset white balance parameters of the plurality of projection equipment are divided into a plurality of groups according to respective color temperatures.
Further, 240 preset white balance parameters of the projection equipment are set, and the RGB of the preset white balance parameters of the projection equipment are different;
the preset white balance parameters of the plurality of projection devices are divided into 3 groups according to respective color temperatures, and the preset white balance parameters of the first projection device, the preset white balance parameters of the second projection device and the preset white balance parameters of the third projection device are sequentially increased corresponding to the color temperatures.
Further, the step of calculating the white balance parameter of the background wall according to the background wall image includes:
uniformly selecting a plurality of areas on the background wall image;
and calculating the white balance parameter of the background wall according to the pixel values of the plurality of areas.
Further, the plurality of regions are regions on diagonal lines of the background.
Fig. 2 to 3 are embodiments of the white balance adjustment method for a projection apparatus according to the present invention.
Referring to fig. 2, fig. 2 is a flowchart illustrating a control method of a white balance adjustment method of a projection apparatus according to a first embodiment of the present invention.
Step S10: acquiring a background wall image;
the method for obtaining the background wall image is not limited, and the background wall image can be obtained through an external camera, such as a smart phone and a camera, and then the obtained background wall image is transmitted to the projection equipment, or the projection equipment itself has an image obtaining function, so that the method is not limited herein.
Step S20: and calculating the white balance parameters of the background wall according to the background wall image.
Specifically, in this embodiment, a plurality of regions are uniformly selected on the image of the background wall to ensure that the selected regions are representative and do not lean to specific regions, and then the white balance parameters of the background wall are calculated according to pixel values of the plurality of regions.
Step S30: and adjusting the white balance parameter of the projection equipment according to the white balance parameter of the background wall so that the white balance parameter of the projection image projected on the background wall by the projection equipment is in a set value range.
According to the technical scheme provided by the invention, the white balance parameters of the projection equipment are adjusted according to different backgrounds, so that the white balance parameters of the projection image projected on the background wall by the projection equipment are in a set value range, the set value range can be default by a system, or a plurality of the set value ranges can be set by the system, and a user selects one of the set value ranges or manually inputs the set value range by the user, so that the effect desired by the user can be obtained, and further, the effect of the projection image can be ensured and the consistency can be kept on different background walls.
Referring to fig. 3, fig. 3 is a flowchart illustrating a control method for a white balance adjustment method of a projection apparatus according to a second embodiment of the present invention, where the difference between the first embodiment and the second embodiment is:
step S30, including:
step S31: calculating to obtain an approximate white balance parameter of the projection equipment according to the white balance parameter of the background wall;
the white balance parameters of the background wall complement the white balance parameters of the projection device, for example, the ratio of blue, green and red light of the scene (white as seen by the naked eye) is 2: 1: 1 (the blue light has a large proportion, the color temperature is high), then the proportion relationship after white balance adjustment is 1: 2: 2, the ratio of green to red is increased after adjustment, so that the ratio of blue, green and red is the same for the images shot by the adjusted scenery through white balance adjustment. Therefore, after the white balance parameters of the background wall are determined, the balance parameters of the projection equipment can be basically determined.
Step S32: selecting a primary white balance parameter adapted to the ideal white balance parameter from preset white balance parameters of a projection device so that a difference value between the ideal white balance parameter and the primary white balance parameter is within a first set value;
the method comprises the steps of storing a plurality of preset white balance parameters in a memory in advance, selecting a primary white balance parameter matched with an ideal white balance parameter from the plurality of preset white balance parameters, wherein the specific selection mode can be traversal or other modes, and specifically, after the selection, the difference value between the selected ideal white balance parameter and the primary white balance parameter is within a first set value, the size of the first set value is not limited, and the first set value can be a default of a system, can be selected by a user, and can also be manually set by the user.
Step S33: starting the projection equipment to project to the background wall according to the primarily selected white balance parameters;
after the initial white balance parameter is selected, the projection equipment can be started to project on the background wall;
step S34: acquiring a projected image in real time, and calculating a white balance parameter of the projected image;
and then obtaining a projected image, wherein the specific obtaining mode is not limited, the above-mentioned image obtaining mode of the background wall can be referred to, and further, the white balance parameter of the projected image can be calculated according to the projected image.
Step S35: comparing a white balance parameter of the projected image with a user-desired white balance parameter;
step S36: when the difference value between the white balance parameter of the projected image and the white balance parameter desired by the user is out of the second set range, adjusting the electrical parameter of the projection equipment until the difference value between the actual white balance parameter and the ideal white balance parameter is within the second set value.
The electrical parameters of the projection device are adjusted by an actual projection effect, that is, a difference between a white balance parameter of the projected image and a white balance parameter desired by a user, specifically, the current of the projection device is adjusted, so that the difference between the actual white balance parameter and the ideal white balance parameter is within the second set value, the magnitude of the second set value is not limited, and the second set value may be a default of a system, may be selected by the user, or may be manually set by the user, and in order to obtain a better effect, the second set value is preferably smaller than the first set value.
Further, in this embodiment, a plurality of preset white balance parameters of the projection apparatus are provided, and the preset white balance parameters of the plurality of projection apparatuses are divided into a plurality of groups according to respective color temperatures. Thus, the preset white balance parameters are set in groups, the preset white balance parameters can be selected according to a large group, then the adaptive preset white balance parameters are selected from the group, for the selected group, the two end values of the group can be selected firstly, the group can be locked quickly, then the adaptive preset white balance parameters are selected from the group, and in order to improve the selection efficiency, a binary method can be adopted for selection. Specifically, in this embodiment, 240 preset white balance parameters of the projection apparatus are set, RGB of the preset white balance parameters of each projection apparatus is different, the preset white balance parameters of the plurality of projection apparatuses are divided into 3 groups according to their respective color temperatures, and the preset white balance parameters of the first projection apparatus, the preset white balance parameters of the second projection apparatus, and the preset white balance parameters of the third projection apparatus are sequentially increased according to the color temperatures.
The white balance parameter desired by the user may be default by the system or set by the user, and in an embodiment, before the step S36, the method further includes: the white balance parameters selected by the user and desired by the user are received, that is, the user can set the white balance parameters desired by the user according to the self requirement, so that the corresponding projection picture effect is achieved.
The present invention further provides a computer-readable storage medium, on which a white balance adjustment program of a projection apparatus is stored, and when executed by a processor, the method of adjusting the white balance of the projection apparatus according to any of the above embodiments is implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and include instructions for enabling a terminal device (such as a mobile phone, a computer, a server, a television, or a network device) to execute the methods according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for adjusting white balance of a projection apparatus, comprising the steps of:
acquiring a background wall image;
calculating a white balance parameter of the background wall according to the background wall image;
and adjusting the white balance parameter of the projection equipment according to the white balance parameter of the background wall so that the white balance parameter of the projection image projected on the background wall by the projection equipment is in a set value range.
2. The white balance adjustment method of a projection apparatus according to claim 1, wherein the step of adjusting the white balance parameter of the projection apparatus according to the white balance parameter of the background wall comprises:
calculating to obtain an approximate white balance parameter of the projection equipment according to the white balance parameter of the background wall;
selecting a primary white balance parameter adapted to the ideal white balance parameter from preset white balance parameters of a projection device so that a difference value between the ideal white balance parameter and the primary white balance parameter is within a first set value;
starting the projection equipment to project to the background wall according to the primarily selected white balance parameters;
acquiring a projected image in real time, and calculating a white balance parameter of the projected image;
comparing a white balance parameter of the projected image with a user-desired white balance parameter;
when the difference value between the white balance parameter of the projected image and the white balance parameter desired by the user is out of the second set range, adjusting the electrical parameter of the projection equipment until the difference value between the actual white balance parameter and the ideal white balance parameter is within the second set value.
3. The white balance adjustment method of a projection apparatus according to claim 2, wherein the step of comparing the white balance parameter of the projection image with a user-desired white balance parameter is preceded by:
a user-selected user-desired white balance parameter is received.
4. The white balance adjustment method for a projection apparatus according to claim 2, wherein the user-desired white balance parameter is set.
5. The method for adjusting the white balance of a projection apparatus according to claim 2, wherein a plurality of preset white balance parameters of the projection apparatus are provided, and the preset white balance parameters of the plurality of projection apparatuses are divided into a plurality of groups according to respective color temperatures.
6. The white balance adjustment method for a projection apparatus according to claim 5, wherein 240 preset white balance parameters are set for the projection apparatus, and RGB of the preset white balance parameters of the respective projection apparatuses are different;
the preset white balance parameters of the plurality of projection devices are divided into 3 groups according to respective color temperatures, and the preset white balance parameters of the first projection device, the preset white balance parameters of the second projection device and the preset white balance parameters of the third projection device are sequentially increased corresponding to the color temperatures.
7. The white balance adjustment method for a projection apparatus according to claim 1, wherein the step of calculating the white balance parameter of the background wall based on the background wall image comprises:
uniformly selecting a plurality of areas on the background wall image;
and calculating the white balance parameter of the background wall according to the pixel values of the plurality of areas.
8. The white balance adjustment method for a projection apparatus according to claim 7, wherein the plurality of areas are areas on a diagonal of the background.
9. A readable storage medium, characterized in that a white balance adjustment program of a projection apparatus executable on a processor is stored, the white balance adjustment program of the projection apparatus being configured to implement the steps of the white balance adjustment method of the projection apparatus according to any one of claims 1 to 8.
10. A projection device, comprising:
a projection apparatus main body having a lens for projecting an image; and the number of the first and second groups,
a control device electrically connected to the projection apparatus main body, the control device comprising a memory, a processor and a white balance adjustment program of the projection apparatus stored on the storage and operable on the processor, the white balance adjustment program of the projection apparatus being configured to implement the steps of the white balance adjustment method of the projection apparatus according to any one of claims 1 to 8.
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| CN106331664A (en) * | 2015-06-30 | 2017-01-11 | 芋头科技（杭州）有限公司 | Projector control method and projector suitable for the same |
| CN110177265A (en) * | 2019-06-11 | 2019-08-27 | 成都极米科技股份有限公司 | Method for controlling projection, projection control and optical projection system |
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| KR20070119931A (en) * | 2006-06-16 | 2007-12-21 | 엘지전자 주식회사 | Control apparatus and method for white balance of projection tv |
| CN105100764A (en) * | 2015-06-26 | 2015-11-25 | 小米科技有限责任公司 | Photographing method and device |
| CN106331664A (en) * | 2015-06-30 | 2017-01-11 | 芋头科技（杭州）有限公司 | Projector control method and projector suitable for the same |
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