CN112995622A - Projection control method, device, terminal and storage medium - Google Patents
Projection control method, device, terminal and storage medium Download PDFInfo
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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]
- H04N9/3141—Constructional details thereof
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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]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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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
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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
- H04N9/3188—Scale or resolution adjustment
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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]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
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Abstract
The disclosure relates to a projection control method, a projection control device, a terminal and a storage medium. The projection control method provided by the present disclosure includes: determining projection distances of a plurality of target regions on a projection surface external to the projection device relative to the projection device; and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value. According to the projection control method provided by the embodiment of the disclosure, the determined projection picture display area can be uniform and flat, and the size and the position of the projection picture can be automatically determined in a complex projection environment.
Description
Technical Field
The disclosure relates to the technical field of image display equipment, in particular to a projection control method, a projection control device, a projection control terminal and a storage medium.
Background
Projectors are image output and display devices commonly used in business offices, offline education, and audio-visual entertainment. Currently, some projectors have a single-point distance measuring device, which can be used to measure the distance between a certain point on the projection surface and the projector, and the projector can use the distance as the projection distance to adjust the projection image. However, in a complicated projection environment, for example, when additional objects such as a placement board and a clock are hung on a projection wall, the distance obtained based on the single point distance measurement may be the distance between the additional objects and the projector rather than the actual projection distance, and the projector may also automatically project the image onto the additional objects, thereby requiring manual adjustment by the user, which is inconvenient for the user.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
According to one or more embodiments of the present disclosure, there is provided a projection control method including:
determining projection distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device;
and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
According to one or more embodiments of the present disclosure, there is provided a projection-based control apparatus including:
a projection distance determination unit for determining projection distances of a plurality of target regions on a projection surface outside a projection apparatus with respect to the projection apparatus;
and the projection picture determining unit is used for determining a projection picture display area according to the projection distances of the target areas, and the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
According to one or more embodiments of the present disclosure, there is provided a mobile terminal, characterized in that the mobile terminal includes:
at least one memory and at least one processor;
wherein the memory is configured to store program code, and the processor is configured to call the program code stored in the memory to execute a projection control method provided according to one or more embodiments of the present disclosure.
According to one or more embodiments of the present disclosure, there is provided a non-transitory computer storage medium storing program code which, when run on a computer device, causes the computer device to perform a projection control method provided according to one or more embodiments of the present disclosure.
According to the projection control method provided by one or more embodiments of the disclosure, the projection picture size and the position can be automatically determined in a complex projection environment by determining the projection distances of a plurality of target areas on a projection surface outside the projection device relative to the projection device and determining a projection picture display area mainly composed of the target areas with the same projection distances based on the projection distances of the plurality of target areas, thereby ensuring that the surface area of the determined projection picture display area is uniform and flat.
Drawings
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and features are not necessarily drawn to scale.
Fig. 1 is a flowchart of a projection control method according to an embodiment of the present disclosure;
fig. 2 is a schematic view of an application scenario of a projection control method according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a rectangular candidate projection area provided in accordance with an embodiment of the present disclosure;
FIGS. 4A-4C are schematic diagrams of a display area of a projection screen according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a projection screen according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a projection control method according to another embodiment of the disclosure;
fig. 7 is a schematic structural diagram of an exemplary projection control apparatus according to an embodiment of the disclosure
Fig. 8 is a schematic structural diagram of a terminal device for implementing an embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The term "responsive to" and related terms mean that one signal or event is affected to some extent, but not necessarily completely or directly, by another signal or event. If an event x occurs "in response" to an event y, x may respond directly or indirectly to y. For example, the occurrence of y may ultimately result in the occurrence of x, but other intermediate events and/or conditions may exist. In other cases, y may not necessarily result in the occurrence of x, and x may occur even though y has not already occurred. Furthermore, the term "responsive to" may also mean "at least partially responsive to". The term "determining" broadly encompasses a wide variety of actions that can include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like, and can also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like, as well as resolving, selecting, choosing, establishing and the like. Relevant definitions for other terms will be given in the following description.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.
The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.
Fig. 1 shows a projection control method 100 provided based on an embodiment of the present disclosure, including steps S101 to S102:
step S101: projection distances of a plurality of target regions on a projection surface external to a projection device with respect to the projection device are determined.
The projection surface includes, but is not limited to, a wall surface, a projection curtain, and other object surfaces, which may be surfaces of one or more objects.
In some embodiments, a multi-point ranging sensor may be disposed on the projection device, with which the distances of multiple target regions on the projection surface relative to the projection device are measured. The multi-point distance measuring sensor can measure distances (namely, distances equivalent to the distance of the projection device) between a plurality of points in the measuring range of the multi-point distance measuring sensor, and after the projection device is placed towards the projection surface by a user, the projection device can measure the distances between the plurality of points on the projection surface and the projection device through the multi-point distance measuring sensor arranged on the projection device. Illustratively, the multi-point ranging sensor includes a TOF (time of flight) sensor. It should be noted that, in this example, the plurality of target areas may be determined based on a plurality of distance-measuring points measured by the multi-point distance-measuring sensor by default, for example, the areas where the plurality of distance-measuring points are located, or based on a preset area division rule for the measurement frame, which is not limited herein.
It should be noted that the "projection distance of the target area relative to the projection device" in the present disclosure refers to a distance between the target area and a vertical plane where the projection device is located. For example, the data measured by the multipoint ranging device may be used as the projection distance.
Step S102: and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
In some embodiments, the preset threshold is 3cm, that is, the difference between the projection distances of any two target areas in the display area of the projection screen is not more than 3 cm.
Exemplarily, fig. 2 shows an application scenario diagram of a projection control method provided according to an embodiment of the present disclosure. The projection device 10 may project a projection picture onto the projection surface 20 located outside the projection device, and according to the projection control method provided by one or more embodiments of the present disclosure, the projection distances of the plurality of target areas 30 on the projection surface 20 with respect to the projection device 10 may be determined, and the projection picture display area 40 may be determined on the projection surface based on the projection distances, so as to display the projection picture in the projection picture display area 40. Wherein the determined target areas in the projection screen display area 40 have the same or similar projection distances.
In this way, according to the projection control method provided by one or more embodiments of the present disclosure, by determining the projection distances of a plurality of target areas on the projection surface outside the projection device with respect to the projection device and determining the projection screen display area composed of the target areas having the same or similar projection distances based on the projection distances of the plurality of target areas, the surface area of the determined projection screen display area is ensured to be uniform and flat, and the size and the position of the projection screen can be automatically determined in a complicated projection environment.
In some embodiments, the plurality of target regions are arranged in a rectangular array.
In some embodiments, step S102 includes:
step A1: determining a rectangular candidate projection area according to the projection distances of the target areas, wherein the difference between the projection distances of any two target areas in the rectangular candidate projection area does not exceed a preset threshold;
step A2: and determining a projection picture display area based on the rectangular candidate projection area.
Illustratively, fig. 3 is a schematic illustration of a plurality of target regions provided in accordance with one embodiment of the present disclosure, showing a 6-row 6-column rectangular array of 36 target regions 30, wherein the target regions labeled A, B and C have different projection distances A, B and C, respectively. According to the projection control method provided by one or more embodiments of the present disclosure, a rectangular region 50 composed of a target region a may be used as a rectangular candidate projection region, in which the target regions have the same projection distance (i.e., projection distance a), and a projection screen display region may be determined within the rectangular candidate projection region 50.
In some embodiments, step a2 includes;
step a 21: and determining a projection picture display area with the largest area according with the projection picture proportion based on the rectangular candidate projection area.
In some embodiments, step a21 further comprises:
if more than two projection picture display areas with the largest area according with the proportion of the projection pictures exist, the projection picture display area at the top is taken as the final projection picture display area. Therefore, the whole projection picture can be higher, especially in the application scene of desktop projection, the dependence of the projection equipment on the projection support can be reduced, and the cervical vertebra of a user can be protected.
Fig. 4A-4C are schematic diagrams of a projection screen display area determined based on the rectangular candidate projection area shown in fig. 3 according to an embodiment of the disclosure. Referring to fig. 4A-4C, when the aspect ratio of the projection screen is 3: 4, there are at least a plurality of projection screen display areas 41, 42, and 43 that meet the aspect ratio within the rectangular candidate area 50, and according to one or more embodiments of the present disclosure, the projection screen display area 41 positioned uppermost as shown in fig. 4A may be used as the final projection screen display area.
In some embodiments, if the actual projection image projected on the projection surface by the projection device is larger than the projection image display area determined according to one or more embodiments of the present disclosure, dark-field display is performed on a portion outside the projection image display area. In the present embodiment, by performing dark-field display on a portion other than the projection screen display region on the projection surface, it is possible to avoid interference of an object located outside the projection screen display region with the projection screen.
Exemplarily, referring to fig. 5, when an actual projection screen 60 projected on a projection surface by a projection apparatus is larger than the projection screen display area 40 determined according to an embodiment of the present disclosure, a black border is displayed in an area outside the projection screen display area 40.
Referring to fig. 6, fig. 6 illustrates a projection control method 600 of a projection apparatus provided based on another embodiment of the present disclosure, including steps S601 to S603:
step S601: projection distances of a plurality of target areas on a projection surface external to the projection device with respect to the projection device are determined based on a multi-point ranging sensor disposed on the projection device.
Step S602: determining a rectangular candidate projection area according to the projection distances of the target areas, wherein the difference between the projection distances of any two target areas in the rectangular candidate projection area does not exceed a preset threshold;
step S603: and determining a projection picture display area with the largest area according with the projection picture proportion based on the rectangular candidate projection area.
In some embodiments, method S100 further comprises:
step B1: and controlling the projection equipment to focus according to the projection distance of the target area in the projection picture display area.
In this embodiment, since the projection distance of the target area in the projection screen display area can accurately reflect the actual projection distance, the projection device can automatically focus more accurately by focusing based on the projection distance of the target area in the projection screen display area.
In some embodiments, step B1 includes:
step b 1: determining a lens driving distance corresponding to a preset projection distance according to a mapping relation between the projection distance and the lens driving distance;
step b 2: controlling the projection device to focus according to the lens driving distance;
in this embodiment, the mapping relationship may be pre-stored in a local configuration file of the projection device or acquired from a remote server, and the lens driving distance may be determined simply and rapidly according to the actual projection distance by pre-measuring a series of lens driving distances corresponding to a specific projection distance without implementing a complicated picture focusing technique, thereby completing the auto-focusing of the projection device.
Correspondingly, fig. 7 shows a projection control apparatus 700 provided in accordance with one or more embodiments of the present disclosure, including:
a projection distance determination unit 701 for determining projection distances of a plurality of target regions on a projection surface outside the projection apparatus with respect to the projection apparatus;
a projection image determining unit 702, configured to determine a projection image display area according to projection distances of the multiple target areas, where a difference between the projection distances of any two target areas in the projection image display area does not exceed a preset threshold.
According to the projection control device provided by one or more embodiments of the disclosure, the projection picture size and the position can be automatically determined in a complex projection environment by determining the projection distances of a plurality of target areas on the projection surface outside the projection device relative to the projection device and determining the projection picture display area mainly composed of the target areas with the same projection distances based on the projection distances of the plurality of target areas, so as to ensure that the surface area of the determined projection picture display area is uniform and flat.
In some embodiments, a multi-point ranging sensor may be disposed on the projection device, with which the distances of multiple target regions on the projection surface relative to the projection device are measured. The multi-point distance measuring sensor can measure distances (namely, distances equivalent to the distance of the projection device) between a plurality of points in the measuring range of the multi-point distance measuring sensor, and after the projection device is placed towards the projection surface by a user, the projection device can measure the distances between the plurality of points on the projection surface and the projection device through the multi-point distance measuring sensor arranged on the projection device. Illustratively, the multi-point ranging sensor includes a TOF (time of flight) sensor. It should be noted that, in this example, the plurality of target areas may be determined based on a plurality of distance-measuring points measured by the multi-point distance-measuring sensor by default, for example, the areas where the plurality of distance-measuring points are located, or based on a preset area division rule for the measurement frame, which is not limited herein.
It should be noted that the "projection distance of the target area relative to the projection device" in the present disclosure refers to a distance between the target area and a vertical plane where the projection device is located. For example, the data measured by the multipoint ranging device may be used as the projection distance.
In some embodiments, the preset threshold is 3cm, that is, the difference between the projection distances of any two target areas in the display area of the projection screen is not more than 3 cm.
In some embodiments, the plurality of target regions are arranged in a rectangular array.
In some embodiments, the projection picture determination unit 602 includes:
a candidate projection area determining subunit, configured to determine a rectangular candidate projection area according to projection distances of the multiple target areas, where a difference between projection distances of any two target areas in the rectangular candidate projection area does not exceed a preset threshold;
and the projection picture display area determining subunit is used for determining the projection picture display area based on the rectangular candidate projection area.
In some embodiments, the projection screen display area determination subunit is configured to determine, based on the rectangular candidate projection area, a projection screen display area having a largest area in proportion to the projection screen.
In some embodiments, the projection screen display area determining subunit is further operable to: if more than two projection picture display areas with the largest area according with the proportion of the projection pictures exist, the projection picture display area at the top is taken as the final projection picture display area. Therefore, the whole projection picture can be higher, especially in the application scene of desktop projection, the dependence of the projection equipment on the projection support can be reduced, and the cervical vertebra of a user can be protected.
In some embodiments, the projection control apparatus further comprises:
and the dark field display unit is used for performing dark field display on a part outside the projection picture display area if the actual projection picture projected on the projection surface by the projection equipment is larger than the projection picture display area determined according to one or more embodiments of the disclosure.
In the present embodiment, by performing dark-field display on a portion other than the projection screen display region on the projection surface, it is possible to avoid interference of an object located outside the projection screen display region with the projection screen.
In some embodiments, the projection control apparatus further comprises:
and the focusing unit is used for controlling the projection equipment to focus according to the projection distance of the target area in the projection picture display area.
In this embodiment, since the projection distance of the target area in the projection screen display area can accurately reflect the actual projection distance, the projection device can automatically focus more accurately by focusing based on the projection distance of the target area in the projection screen display area.
In some embodiments, the focusing unit includes:
the driving distance determining subunit is used for determining a lens driving distance corresponding to the projection distance according to a mapping relation between a preset projection distance and the lens driving distance;
the focusing control unit subunit is used for controlling the projection device to focus according to the lens driving distance;
in this embodiment, the mapping relationship may be pre-stored in a local configuration file of the projection device or acquired from a remote server, and the lens driving distance may be determined simply and rapidly according to the actual projection distance by pre-measuring a series of lens driving distances corresponding to a specific projection distance without implementing a complicated picture focusing technique, thereby completing the auto-focusing of the projection device.
For the embodiments of the apparatus, since they correspond substantially to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described apparatus embodiments are merely illustrative, in that modules illustrated as separate modules may or may not be separate. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Accordingly, according to one or more embodiments of the present disclosure, there is provided a terminal device including:
at least one memory and at least one processor;
wherein the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the projection control method provided by one or more embodiments of the present disclosure.
Referring now to fig. 8, a block diagram of a terminal device 800 suitable for use in implementing embodiments of the present disclosure is shown. The terminal device in the embodiments of the present disclosure may include, but is not limited to, a terminal such as a projector, a television, a smart screen, a mobile phone, a computer, an electronic reader, a PDA (personal digital assistant), a PAD (tablet computer), and the like. The terminal device shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 8, the terminal device 800 may include a processing means (e.g., a central processing unit, a graphic processor, etc.) 801 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)802 or a program loaded from a storage means 808 into a Random Access Memory (RAM) 803. In the RAM803, various programs and data necessary for the operation of the terminal apparatus 800 are also stored. The processing apparatus 801, the ROM802, and the RAM803 are connected to each other by a bus 804. An input/output (I/O) interface 805 is also connected to bus 804.
Generally, the following devices may be connected to the I/O interface 805: input devices 806 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; an output device 807 including a projection module and, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, etc.; storage 808 including, for example, magnetic tape, hard disk, etc.; and a communication device 809. The communication means 809 may allow the terminal apparatus 800 to perform wireless or wired communication with other apparatuses to exchange data. While fig. 8 illustrates a terminal apparatus 800 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a non-transitory computer readable medium, the computer program containing program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication means 809, or installed from the storage means 808, or installed from the ROM 802. The computer program, when executed by the processing apparatus 801, performs the above-described functions defined in the methods of the embodiments of the present disclosure.
It should be noted that the computer readable medium in the present disclosure can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
In some embodiments, the clients, servers may communicate using any currently known or future developed network protocol, such as HTTP (hypertext transfer protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communications network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the Internet (e.g., the Internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed network.
The computer readable medium may be embodied in the mobile terminal; or may exist separately and not be incorporated into the mobile terminal.
The computer readable medium carries one or more programs which, when executed by the terminal device, cause the terminal device to: determining projection distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device; and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
Computer program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including but not limited to an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer device, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software or hardware. Where the name of a unit does not in some cases constitute a limitation of the unit itself, for example, the projection distance determination unit may also be described as a "unit determining the projection distances of a plurality of target areas on a projection surface external to the projection device with respect to said projection device".
The functions described herein above may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), systems on a chip (SOCs), Complex Programmable Logic Devices (CPLDs), and the like.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
According to one or more embodiments of the present disclosure, there is provided a projection control method including: determining projection distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device; and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
According to one or more embodiments of the present disclosure, the plurality of target regions are arranged in a rectangular array.
According to one or more embodiments of the present disclosure, the determining a projection screen display area according to projection distances of the plurality of target areas includes: determining a rectangular candidate projection area according to the projection distances of the target areas, wherein the difference between the projection distances of any two target areas in the rectangular candidate projection area does not exceed a preset threshold; and determining a projection picture display area based on the rectangular candidate projection area.
According to one or more embodiments of the present disclosure, the determining a projection screen display area based on the rectangular candidate projection area includes: and determining a projection picture display area with the largest area according with the projection picture proportion based on the rectangular candidate projection area.
According to one or more embodiments of the present disclosure, the determining a projection screen display area having a largest area according to a projection screen scale based on the rectangular candidate projection area includes: if more than two projection picture display areas with the largest area according with the proportion of the projection pictures exist, the projection picture display area at the top is taken as the final projection picture display area.
According to one or more embodiments of the present disclosure, a multipoint ranging sensor is disposed on the projection device;
determining projected distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device, comprising: determining projected distances for the plurality of target regions based on the multi-point ranging sensor.
In accordance with one or more embodiments of the present disclosure, the multipoint ranging sensor comprises a TOF sensor.
According to one or more embodiments of the present disclosure, there is provided a projection control method, further including: and controlling the projection equipment to focus according to the projection distance of the target area in the projection picture display area.
According to one or more embodiments of the present disclosure, there is provided a projection control apparatus including: a projection distance determination unit for determining projection distances of a plurality of target regions on a projection surface outside a projection apparatus with respect to the projection apparatus; and the projection picture determining unit is used for determining a projection picture display area according to the projection distances of the target areas, and the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
According to one or more embodiments of the present disclosure, there is provided a terminal including: at least one memory and at least one processor; wherein the memory is configured to store program code, and the processor is configured to call the program code stored in the memory to execute a projection control method provided according to one or more embodiments of the present disclosure.
According to one or more embodiments of the present disclosure, there is provided a non-transitory computer storage medium storing program code which, when run on a computer device, causes the computer device to perform a projection control method provided by one or more embodiments of the present disclosure.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other embodiments in which any combination of the features described above or their equivalents does not depart from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (11)
1. A projection control method, comprising:
determining projection distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device;
and determining a projection picture display area according to the projection distances of the plurality of target areas, wherein the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
2. The projection control method according to claim 1,
the plurality of target regions are arranged in a rectangular array.
3. The projection control method according to claim 1, wherein the determining a projection screen display area according to the projection distances of the plurality of target areas comprises:
determining a rectangular candidate projection area according to the projection distances of the target areas, wherein the difference between the projection distances of any two target areas in the rectangular candidate projection area does not exceed a preset threshold;
and determining a projection picture display area based on the rectangular candidate projection area.
4. The projection control method according to claim 3, wherein the determining a projection screen display area based on the rectangular candidate projection area includes:
and determining a projection picture display area with the largest area according with the projection picture proportion based on the rectangular candidate projection area.
5. The projection control method according to claim 4, wherein the determining of the projection screen display area having the largest area in accordance with the projection screen scale based on the rectangular candidate projection area includes:
if more than two projection picture display areas with the largest area according with the proportion of the projection pictures exist, the projection picture display area at the top is taken as the final projection picture display area.
6. The projection control method according to claim 1,
a multipoint distance measuring sensor is arranged on the projection equipment;
the determining projected distances of a plurality of target regions on a projection surface external to a projection device relative to the projection device includes: determining projected distances for the plurality of target regions based on the multi-point ranging sensor.
7. The projection control method according to claim 6,
the multi-point ranging sensor comprises a TOF sensor.
8. The projection control method according to claim 1, further comprising:
and controlling the projection equipment to focus according to the projection distance of the target area in the projection picture display area.
9. A projection control apparatus, comprising:
a projection distance determination unit for determining projection distances of a plurality of target regions on a projection surface outside a projection apparatus with respect to the projection apparatus;
and the projection picture determining unit is used for determining a projection picture display area according to the projection distances of the target areas, and the difference between the projection distances of any two target areas in the projection picture display area does not exceed a preset threshold value.
10. A terminal, comprising:
at least one memory and at least one processor;
wherein the memory is configured to store program code, and the processor is configured to call the program code stored in the memory to perform the projection control method of any one of claims 1 to 8.
11. A non-transitory computer storage medium, characterized in that,
the non-transitory computer storage medium stores program code that, when run on a computer device, causes the computer device to perform the projection control method of any one of claims 1 to 8.
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