CN113315957A - Screen projection implementation method of projector - Google Patents
Screen projection implementation method of projector Download PDFInfo
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- CN113315957A CN113315957A CN202110550446.1A CN202110550446A CN113315957A CN 113315957 A CN113315957 A CN 113315957A CN 202110550446 A CN202110550446 A CN 202110550446A CN 113315957 A CN113315957 A CN 113315957A
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- projection
- projector
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004891 communication Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims abstract description 19
- 230000004927 fusion Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 238000013139 quantization Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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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
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Controls And Circuits For Display Device (AREA)
- Projection Apparatus (AREA)
Abstract
The invention provides a screen projection implementation method of a projector, which comprises the following steps: the central controller sends a projection request to the communication module, and the communication module sends the projection request to the projector module; the projector module receives projection request information from the central processing unit and returns projection permission information to the communication module, and the communication module returns the projection permission information to the central processing unit; the central controller receives projection permission from the projector module and sends a file to be projected to the projector module through the communication module; the projector module receives the projection file from the central processing unit and projects the file to be projected. The projector screen module, the communication module and the central controller are matched to realize screen projection of the projector, and the communication module is in wireless communication and is more convenient compared with traditional wired communication.
Description
Technical Field
The invention belongs to the technical field of screen projection implementation methods of projectors, and particularly relates to a screen projection implementation method of a projector.
Background
A projector is a device that can project content, such as images or video, onto a projection screen. And is applied to projectors in many scenarios. For example, when a meeting is opened, a projector is used for projecting text or image content related to the meeting onto a projection screen for people to watch; in another example, at home, a video is projected onto a projection screen using a projector for better visual enjoyment.
At present, the projection mode of a common projector generally adopts a wired connection mode to connect a computer and transmit information to be displayed to the projector, but the wired connection mode brings many inconveniences. For example, in situations like meetings or lectures, where different participants are talking in turns or different lecturers are presenting in turns, the projector has to be re-docked on frequency.
Disclosure of Invention
In order to solve the technical problem, the invention provides a screen projection implementation method of a projector, which comprises a projector module, a communication module and a central controller, wherein the projector module comprises a signal receiving unit, a signal output unit, a processor, a microcontroller, a storage unit and a projection unit, the signal receiving unit and the signal output unit are respectively connected with the processor, the processor is connected with the microcontroller, and the microcontroller is respectively connected with the projection unit and the storage unit; the projector module is connected with the communication module, the communication module is connected with the central controller, and the screen projection implementation method of the projector comprises the following steps:
s1: the central controller sends a projection request to the communication module, and the communication module sends the projection request to the projector module;
s2: the projector module receives projection request information from the central processing unit and returns projection permission information to the communication module, and the communication module returns the projection permission information to the central processing unit;
s3: the central controller receives projection permission from the projector module and sends a file to be projected to the projector module through the communication module;
s4: the projector module receives the projection file from the central processing unit and projects the file to be projected.
Preferably, the signal receiving unit is connected to the communication module and is capable of receiving a signal from the communication module, and the signal output unit is also connected to the communication module and is capable of outputting a signal sent by the projector module to the communication module.
Preferably, the processor can decode the signal of the signal receiving unit and send the decoded information to the microcontroller, and the processor can also receive the information from the controller, encode the information, and send the encoded information to the signal output unit.
Preferably, the microcontroller is capable of receiving the projection file from the central processing unit and storing the projection file in the storage unit, and transmitting the projection file to the projection unit for projection.
Preferably, the communication module is used for WIFI communication.
Preferably, the signal output unit includes: selecting a projection image signal, inputting an IP address, selecting a corresponding port and encrypting the projection image signal;
the signal receiving unit includes: opening of the server, opening of the port and decryption of the projected image signal.
Preferably, the specific process of the server is as follows:
providing corresponding service according to the projection request; the server side informs the local host through a communication channel and selects to receive the projection request on a certain port;
waiting for a client request to arrive at the port, receiving a repeated request, processing the request and sending a response signal;
receiving a concurrent service request, and determining a new process to process a projection request;
after the service is completed, closing the communication connection between the process and the port, and terminating the process; returning to the process, and waiting for the next projection request.
Preferably, the projection image signal encryption specific process is as follows:
decomposing the image into luminance, horizontal edge, vertical edge and diagonal edge components using an orthogonal wavelet transform;
quantizing and coding according to different set strategies, and compressing the luminance subgraph by combining fast cosine transform with coding; and (4) compressing the other three edge components by removing high-frequency components and combining threshold quantization with coding.
Preferably, the specific process of processing the projection image data by the processor receiving the projection image data surface in the signal receiving unit is as follows:
denoising, geometric correction and registration are carried out on the projection image; sampling the low-resolution projection image and the high-resolution single-band image through image fusion to generate a high-resolution projection image;
and after the image fusion is finished, inlaying and cutting the projected image.
Preferably, the mosaic and crop specific process of the projection image is as follows:
when the image is embedded, determining a reference image as the benchmark of the embedded image;
when two or more images are embedded, the hues of the images are kept consistent through histogram equalization and color smoothing;
and simultaneously performing sub-cropping on the image through the natural area boundary.
The invention has the beneficial effects that: through the cooperation between projecting apparatus module, communication module, the central controller, realize throwing of projecting apparatus and screen, and communication module is wireless communication, compares in traditional wired communication convenience more.
Drawings
Fig. 1 is a step diagram of a projection screen implementation method of a projector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of 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.
The invention is further described below:
example (b):
a screen projection implementation method of a projector comprises a projector module, a communication module and a central controller, wherein the projector module comprises a signal receiving unit, a signal output unit, a processor, a microcontroller, a storage unit and a projection unit, the signal receiving unit and the signal output unit are respectively connected with the processor, the processor is connected with the microcontroller, and the microcontroller is respectively connected with the projection unit and the storage unit; the projector module is connected with the communication module, and the communication module is connected with the central controller.
As shown in fig. 1, the screen projection implementation method of the projector includes:
(1) the central controller sends a projection request to the communication module, and the communication module sends the projection request to the projector module;
(2) a signal receiving unit in the projector module receives projection request information from a central processing unit and sends the projection request information to a processor, the processor decodes the projection request information and sends the decoded projection request information to a controller, the controller sends projection permission information to the processor, the processor encodes the projection information and transmits the encoded projection information to a signal output unit, the signal output unit transmits the encoded projection information to a communication module, and the communication module returns to the central processing unit;
s3: the central controller receives projection permission from the projector module and sends a file to be projected to the projector module through the communication module;
s4: the signal receiving module in the projector module receives the projection file from the central processing unit and transmits the signal of the signal receiving module to the processor, the processor decodes the projection file and transmits the decoded projection file to the controller, and the controller transmits the projection file to the projection unit for projection on one hand and stores the projection file in the storage unit on the other hand so as to be played subsequently.
Specifically, the communication module is used for WIFI communication.
The screen projection of the projector is realized through the cooperation between the projector module, the communication module and the central controller, and the communication module is in wireless communication and is more convenient than traditional wired communication.
Specifically, the signal output unit includes: selecting a projection image signal, inputting an IP address, selecting a corresponding port and encrypting the projection image signal;
the signal receiving unit includes: opening of the server, opening of the port and decryption of the projected image signal.
Specifically, the specific process of the server is as follows:
providing corresponding service according to the projection request; the server side informs the local host through a communication channel and selects to receive the projection request on a certain port;
waiting for a client request to arrive at the port, receiving a repeated request, processing the request and sending a response signal;
receiving a concurrent service request, and determining a new process to process a projection request;
after the service is completed, closing the communication connection between the process and the port, and terminating the process; returning to the process, and waiting for the next projection request.
Specifically, the projection image signal encryption specifically comprises the following processes:
decomposing the image into luminance, horizontal edge, vertical edge and diagonal edge components using an orthogonal wavelet transform;
quantizing and coding according to different set strategies, and compressing the luminance subgraph by combining fast cosine transform with coding; and (4) compressing the other three edge components by removing high-frequency components and combining threshold quantization with coding.
Specifically, the specific process of processing the projection image data by the processor receiving the projection image data surface in the signal receiving unit is as follows:
denoising, geometric correction and registration are carried out on the projection image; sampling the low-resolution projection image and the high-resolution single-band image through image fusion to generate a high-resolution projection image;
and after the image fusion is finished, inlaying and cutting the projected image.
Specifically, the embedding and cutting processes of the projection image are as follows:
when the image is embedded, determining a reference image as the benchmark of the embedded image;
when two or more images are embedded, the hues of the images are kept consistent through histogram equalization and color smoothing;
and simultaneously performing sub-cropping on the image through the natural area boundary.
It should be noted that, in this document, moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A screen projection implementation method of a projector is characterized by comprising a projector module, a communication module and a central controller, wherein the projector module comprises a signal receiving unit, a signal output unit, a processor, a microcontroller, a storage unit and a projection unit, the signal receiving unit and the signal output unit are respectively connected with the processor, the processor is connected with the microcontroller, and the microcontroller is respectively connected with the projection unit and the storage unit; the projector module is connected with the communication module, the communication module is connected with the central controller, and the screen projection implementation method of the projector comprises the following steps:
s1: the central controller sends a projection request to the communication module, and the communication module sends the projection request to the projector module;
s2: the projector module receives projection request information from the central processing unit and returns projection permission information to the communication module, and the communication module returns the projection permission information to the central processing unit;
s3: the central controller receives projection permission from the projector module and sends a file to be projected to the projector module through the communication module;
s4: the projector module receives the projection file from the central processing unit and projects the file to be projected.
2. The method as claimed in claim 1, wherein the signal receiving unit is connected to the communication module and is capable of receiving the signal from the communication module, and the signal output unit is also connected to the communication module and is capable of outputting the signal sent by the projector module to the communication module.
3. The method as claimed in claim 1, wherein the processor is capable of decoding the signal from the signal receiving unit and sending the decoded information to the microcontroller, and the processor is further capable of receiving the information from the controller, encoding the information, and sending the encoded information to the signal output unit.
4. The method as claimed in claim 1, wherein the microcontroller receives the projection file from the cpu and stores the projection file in the storage unit, and transmits the projection file to the projection unit for projection.
5. The method as claimed in claim 1, wherein the communication module is a WIFI communication.
6. The method as claimed in claim 1, wherein the method is implemented by a projector
The signal output unit includes: selecting a projection image signal, inputting an IP address, selecting a corresponding port and encrypting the projection image signal;
the signal receiving unit includes: opening of the server, opening of the port and decryption of the projected image signal.
7. The method for realizing screen projection of the projector according to claim 6, wherein the specific process of the server side is as follows:
providing corresponding service according to the projection request; the server side informs the local host through a communication channel and selects to receive the projection request on a certain port;
waiting for a client request to arrive at the port, receiving a repeated request, processing the request and sending a response signal;
receiving a concurrent service request, and determining a new process to process a projection request;
after the service is completed, closing the communication connection between the process and the port, and terminating the process; returning to the process, and waiting for the next projection request.
8. The method as claimed in claim 6, wherein the specific process of encrypting the projection image signal is as follows:
decomposing the image into luminance, horizontal edge, vertical edge and diagonal edge components using an orthogonal wavelet transform;
quantizing and coding according to different set strategies, and compressing the luminance subgraph by combining fast cosine transform with coding; and (4) compressing the other three edge components by removing high-frequency components and combining threshold quantization with coding.
9. The method as claimed in claim 1, wherein the processing of the projection image data by the processor receiving the projection image data from the signal receiving unit comprises:
denoising, geometric correction and registration are carried out on the projection image; sampling the low-resolution projection image and the high-resolution single-band image through image fusion to generate a high-resolution projection image;
and after the image fusion is finished, inlaying and cutting the projected image.
10. The method as claimed in claim 1, wherein the embedding and cropping of the projected image comprises:
when the image is embedded, determining a reference image as the benchmark of the embedded image;
when two or more images are embedded, the hues of the images are kept consistent through histogram equalization and color smoothing;
and simultaneously performing sub-cropping on the image through the natural area boundary.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010431934.6A CN111741279A (en) | 2020-05-20 | 2020-05-20 | Screen projection implementation method of projector |
| CN2020104319346 | 2020-05-20 |
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| CN113315957A true CN113315957A (en) | 2021-08-27 |
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| CN202010431934.6A Pending CN111741279A (en) | 2020-05-20 | 2020-05-20 | Screen projection implementation method of projector |
| CN202110550446.1A Pending CN113315957A (en) | 2020-05-20 | 2021-05-20 | Screen projection implementation method of projector |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010431934.6A Pending CN111741279A (en) | 2020-05-20 | 2020-05-20 | Screen projection implementation method of projector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114299836A (en) * | 2022-01-24 | 2022-04-08 | 广州万城万充新能源科技有限公司 | Can carry on advertisement projection system and fill electric pile of electric pile |
| CN114566107A (en) * | 2022-01-24 | 2022-05-31 | 广州万城万充新能源科技有限公司 | Distributed image projection system carried on charging pile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207125Y (en) * | 2008-05-21 | 2009-03-11 | 珠海全视通信息技术有限公司 | Projection adaptor |
| CN101800874A (en) * | 2010-01-28 | 2010-08-11 | 南京信息工程大学 | Access method and system of compressed video |
| US20170269788A1 (en) * | 2015-09-08 | 2017-09-21 | Boe Technology Group Co., Ltd. | Projector screen, touch screen projection displaying method and system |
-
2020
- 2020-05-20 CN CN202010431934.6A patent/CN111741279A/en active Pending
-
2021
- 2021-05-20 CN CN202110550446.1A patent/CN113315957A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207125Y (en) * | 2008-05-21 | 2009-03-11 | 珠海全视通信息技术有限公司 | Projection adaptor |
| CN101800874A (en) * | 2010-01-28 | 2010-08-11 | 南京信息工程大学 | Access method and system of compressed video |
| US20170269788A1 (en) * | 2015-09-08 | 2017-09-21 | Boe Technology Group Co., Ltd. | Projector screen, touch screen projection displaying method and system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114299836A (en) * | 2022-01-24 | 2022-04-08 | 广州万城万充新能源科技有限公司 | Can carry on advertisement projection system and fill electric pile of electric pile |
| CN114566107A (en) * | 2022-01-24 | 2022-05-31 | 广州万城万充新能源科技有限公司 | Distributed image projection system carried on charging pile |
| CN114299836B (en) * | 2022-01-24 | 2024-02-09 | 广州万城万充新能源科技有限公司 | Advertisement projection system capable of being carried on charging pile and charging pile |
| CN114566107B (en) * | 2022-01-24 | 2024-02-20 | 广州万城万充新能源科技有限公司 | Distributed image projection system carried on charging pile |
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| CN111741279A (en) | 2020-10-02 |
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