CN109151423B - Projector, projector discrimination method, projector discrimination device, information adding method, and storage medium - Google Patents
Projector, projector discrimination method, projector discrimination device, information adding method, and storage medium Download PDFInfo
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- CN109151423B CN109151423B CN201811292480.8A CN201811292480A CN109151423B CN 109151423 B CN109151423 B CN 109151423B CN 201811292480 A CN201811292480 A CN 201811292480A CN 109151423 B CN109151423 B CN 109151423B
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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
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
Abstract
The invention discloses a projector screening method, which comprises the following steps: determining the brightness value of a target pixel corresponding to a preset image position in a projected image of a preset frame projected by a projector, and determining a character string corresponding to each brightness value; determining verification information according to target characters in the character strings; when the verification information is consistent with preset verification information, the projector is judged to be a preset type projector, wherein when the projector is the preset type projector and projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image. The invention also discloses a projector, a projector screening device and method and a storage medium. The invention can discriminate the projector.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to a projector, a screening method and a screening device of the projector, an information adding method and a computer readable storage medium.
Background
The projector is one of indispensable equipment in office places, and the market is wide.
The manufacturer of the projector may authorize each cooperating agent to sell the projector. In the actual selling process, due to the excellent performance of the projector, the income of an agent selling the projector is rich, so that some illegal molecules can pretend to be the agent to sell the projector, generally, the quality of the sold projector is poor, and the brand effect of the projector is influenced. At present, a better method for judging whether the projector is sold by a manufacturer or an agent of the projector does not exist, namely, the projector is difficult to identify.
Disclosure of Invention
The invention mainly aims to provide a projector, a screening method and a screening device of the projector, an information adding method and a computer readable storage medium of the projector, and aims to solve the problem that the screening of the authenticity of the projector is difficult.
In order to achieve the above object, the present invention provides a method for screening a projector, including the following steps:
determining the brightness value of a target pixel corresponding to a preset image position in a projected image of a preset frame projected by a projector, and determining a character string corresponding to each brightness value;
determining verification information according to target characters in the character strings;
when the verification information is consistent with preset verification information, the projector is judged to be a preset type projector, wherein when the projector is the preset type projector and projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image.
In an embodiment, the step of determining the verification information according to the target character in each of the character strings includes:
determining target characters of the character strings and combination serial numbers corresponding to the target characters;
combining the target characters according to the combination serial numbers to obtain verification character strings;
and determining the verification information according to the verification character string.
In one embodiment, the step of determining the verification information from the verification string comprises:
dividing the verification character string into a plurality of sub character strings, and analyzing each sub character string to obtain a symbol corresponding to each sub character string, wherein the symbol is a number, a letter, a figure or a character;
and determining the verification information according to the symbol corresponding to each substring.
In an embodiment, the step of determining the target character of each of the character strings and the combination serial number corresponding to each of the target characters includes:
and determining target characters of the character strings and combination serial numbers corresponding to the target characters according to the preset image positions corresponding to the character strings.
In an embodiment, the step of determining, in a projection image of a preset frame projected by a projector, a luminance value of a target pixel corresponding to a preset image position further includes:
controlling a camera to acquire a projected image of a preset frame projected by the projector, wherein the shooting frequency of the camera is consistent with the playing frequency of the projector;
or receiving a projected image of a preset frame sent by the projector.
In an embodiment, the preset image position is a vertex angle region in the projected image, a plurality of target pixels are located in the vertex angle image region, each of the target pixels is adjacent to and located at a boundary of the projected image, and at least one of the target pixels is the vertex angle pixel.
In order to achieve the above object, the present invention further provides an information adding method of a projector, including the steps of:
acquiring preset verification information when a projected image of a preset frame is projected;
and changing the set brightness value of the target pixel at the preset image position in the projected image according to preset verification information so as to add the preset verification information to the image projected by the projector.
In an embodiment, the step of changing the set brightness value of the target pixel at the preset image position in the projection image according to the preset verification information includes:
determining a set brightness value of the target pixel, and determining a character string corresponding to the set brightness value;
determining a target character corresponding to the target pixel according to the preset verification information;
and determining a target position of the character string, and changing a character corresponding to the target position in the character string into the target character so as to change the set brightness value of the target pixel.
In an embodiment, the step of determining, according to the preset verification information, a target character corresponding to the target pixel includes:
determining a preset verification character string corresponding to the preset verification information;
and determining a target character corresponding to the target pixel in the preset verification character string according to the frame number of the projected image and the preset image position.
In one embodiment, the step of determining the target position of the character string comprises:
and determining the target position of the character string according to the frame number of the projected image and the preset image position.
In an embodiment, the preset image position is a vertex angle region in the projected image, a plurality of target pixels are located in the vertex angle image region, each of the target pixels is adjacent to and located at a boundary of the projected image, and at least one of the target pixels is the vertex angle pixel.
In order to achieve the above object, the present invention further provides a projector screening apparatus, which includes a processor, a memory, and a projector screening program stored in the memory and operable on the processor, where the projector screening program, when executed by the processor, implements the steps of the projector screening method described above.
In order to achieve the above object, the present invention further provides a storage medium storing a projector screening program, where the projector screening program implements the steps of the projector screening method as described above when executed by the processor.
In order to achieve the above object, the present invention further provides a projector including a processor, a memory, and an information adding program of the projector stored on the memory and operable on the processor, wherein the information adding program of the projector, when executed by the processor, implements the steps of the information adding method of the projector as described above.
In order to achieve the above object, the present invention further provides a storage medium storing an information adding program of a projector, wherein the information adding program of the projector realizes the steps of the information adding method of the projector as described above when executed by the processor.
According to the projector, the screening method, the screening device, the information adding method and the computer readable storage medium provided by the invention, when the preset type projector projects the projection image of the preset frame, the brightness value of the target pixel corresponding to the preset image position in the projection image is changed, so that when the preset type projector is screened, the brightness value of the target pixel corresponding to the preset image position is determined in the projection image of the preset frame, the character string corresponding to the brightness value is determined, the verification information is obtained according to the target character in the character string, and if the verification information is consistent with the preset verification information, the projector is the preset type projector, so that a user and a manufacturer can screen the truth and falseness of the projector.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a screening apparatus of a projector according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a first embodiment of a screening method for a projector according to the present invention;
FIG. 3 is a detailed flowchart of step S20 in FIG. 2;
fig. 4 is a schematic hardware configuration diagram of a projector according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for adding information to a projector according to a first 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
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: determining the brightness value of a target pixel corresponding to a preset image position in a projected image of a preset frame projected by a projector, and determining a character string corresponding to each brightness value; determining verification information according to target characters in the character strings; when the verification information is consistent with preset verification information, the projector is judged to be a preset type projector, wherein when the projector is the preset type projector and projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image. When the preset type projector projects the projected image of the preset frame, the brightness value of the target pixel corresponding to the preset image position in the projected image is changed, so that the water in the water outlet pipeline is not heated too high, when the preset type projector is discriminated, the brightness value of the target pixel corresponding to the preset image position is determined in the projected image of the preset frame, the character string corresponding to the brightness value is determined, the verification information is obtained according to the target character in the character string, and if the verification information is consistent with the preset verification information, the projector is the preset type projector, so that users and manufacturers can discriminate the authenticity of the projector.
As an implementation, the screening apparatus of the projector may be as shown in fig. 1.
The embodiment of the invention relates to a projector, which comprises: a processor 101, e.g. a CPU, a memory 102, a communication bus 103. Wherein a communication bus 103 is used for enabling the connection communication between these components.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). As shown in fig. 1, the memory 103, which is a computer storage medium, may include a projector screening program therein; and the processor 101 may be configured to invoke the projector screening program stored in the memory 102 and perform the following operations:
determining the brightness value of a target pixel corresponding to a preset image position in a projected image of a preset frame projected by a projector, and determining a character string corresponding to each brightness value;
determining verification information according to target characters in the character strings;
when the verification information is consistent with preset verification information, the projector is judged to be a preset type projector, wherein when the projector is the preset type projector and projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image.
In one embodiment, the processor 101 may be configured to invoke a projector screening program stored in the memory 102 and perform the following operations:
determining target characters of the character strings and combination serial numbers corresponding to the target characters;
combining the target characters according to the combination serial numbers to obtain verification character strings;
and determining the verification information according to the verification character string.
In one embodiment, the processor 101 may be configured to invoke a projector screening program stored in the memory 102 and perform the following operations:
dividing the verification character string into a plurality of sub character strings, and analyzing each sub character string to obtain a symbol corresponding to each sub character string, wherein the symbol is a number, a letter, a figure or a character;
and determining the verification information according to the symbol corresponding to each substring.
In one embodiment, the processor 101 may be configured to invoke a projector screening program stored in the memory 102 and perform the following operations:
and determining target characters of the character strings and combination serial numbers corresponding to the target characters according to the preset image positions corresponding to the character strings.
In one embodiment, the processor 101 may be configured to invoke a projector screening program stored in the memory 102 and perform the following operations:
controlling a camera to acquire a projected image of a preset frame projected by the projector, wherein the shooting frequency of the camera is consistent with the playing frequency of the projector;
or receiving a projected image of a preset frame sent by the projector.
In one embodiment, the processor 101 may be configured to invoke a projector screening program stored in the memory 102 and perform the following operations:
the preset image position is a vertex angle area in the projected image, a plurality of target pixels are arranged in the vertex angle image area, each target pixel is adjacent and is located at the boundary of the projected image, and at least one target pixel is the vertex angle pixel.
According to the scheme, when the preset type of projector projects the projection image of the preset frame, the brightness value of the target pixel corresponding to the preset image position in the projection image is changed, so that when the preset type of projector is discriminated whether the projector is the preset type of projector, the brightness value of the target pixel corresponding to the preset image position is determined in the projection image of the preset frame, the character string corresponding to the brightness value is determined, the verification information is obtained according to the target character in the character string, and if the verification information is consistent with the preset verification information, the projector is the preset type of projector, so that a user and a manufacturer can discriminate the authenticity of the projector.
Based on the hardware framework of the screening device of the projector, the embodiment of the screening method of the projector is provided.
Referring to fig. 2, fig. 2 is a first embodiment of a method for screening a projector according to the present invention, where the method for screening a projector includes the following steps:
step S10, in a projection image of a preset frame projected by a projector, determining the brightness value of a target pixel corresponding to a preset image position, and determining a character string corresponding to each brightness value;
in the present invention, the execution body is a discrimination apparatus of a projector. The optical-mechanical module of the projector is provided with a pixel brightness value changing program, and when the projector projects a projected image of a preset frame, the projector can change the brightness value of a target pixel at a preset image position in the projected image. In this regard, the screening apparatus acquires projection images of a preset frame projected by a projector, and analyzes luminance values in the projection images, thereby determining whether the projector is a preset type of projector, which is a genuine projector.
The screening apparatus acquires two types of projection images of a preset frame, specifically, before step S10, the method further includes:
controlling a camera to acquire a projected image of a preset frame projected by the projector, wherein the shooting frequency of the camera is consistent with the playing frequency of the projector, or receiving the projected image of the preset frame sent by the projector;
the screening device can be provided with a high-speed camera, the shooting frequency of the high-speed camera is consistent with the playing frequency of a projection image of the projector, the screening device can acquire the projection image projected by the projector through the high-speed camera, and all the projection images projected by the projector can be acquired by the screening device due to the fact that the shooting frequency of the camera is consistent with the playing frequency of the projector, so that the projection image of a preset frame is acquired in the acquired projection image.
In addition, the screening apparatus can be in communication connection with the projector, and the communication connection mode can be wired connection through an interface or wireless connection. When the projector needs to be screened, an acquisition instruction of a preset frame projection image can be sent to the projector, and after receiving the instruction, the projector feeds back the projection image of the preset frame to the screening device.
The preset frame projection image may be one projection image or a plurality of projection images, which is not limited to this.
After a projected image of a preset frame is obtained, determining a target pixel corresponding to a preset image position in the projected image of the preset frame, wherein the preset image position can be a position in the projected image, preferably is a vertex angle area of the projected image, and a plurality of preset image positions, preferably four, namely four vertex angle areas can be set in one projected image; the arrangement mode is convenient for obtaining the brightness value of the target pixel and can reduce noise interference.
In order not to affect the display quality of the projected image, the target pixel of which the brightness value is changed by the projector is located at the boundary of the projected image, and if the preset image position is a vertex angle area, at least one target pixel is a vertex angle pixel.
Each pixel in the projection image has a corresponding luminance value, and the luminance value can be represented by a set of codes, that is, the luminance value has a unique character string, the length of the character string can be one byte, and the character string can be characterized by binary code, of course, the character string is not limited to binary code, and can also be 8-ary, 16-ary, and the like.
After the target pixel is determined, the brightness value corresponding to the target pixel is determined, and therefore the character string corresponding to the brightness value is determined.
Step S20, determining verification information according to the target character in each character string;
the screening apparatus obtains a target character in each character string, and determines the verification information according to each target character, specifically, referring to fig. 3, that is, step S20 includes:
step S21, determining a target character of each of the character strings and a combination serial number corresponding to each of the target characters;
step S22, according to the combination serial number, combining the target characters to obtain a verification character string;
and step S23, determining the verification information according to the verification character string.
The length of the character string is preferably one byte, but may be a plurality of bytes. When the projector is a genuine product, the character of the target position in the character string is changed by the projector. For this reason, the recognition apparatus obtains the character at the target position, that is, obtains the target character, for example, the target character is the last four characters in the character string, that is, the target character is the lower order in the character string.
Each target character has a corresponding combination serial number, and the combination serial number can be determined according to the preset image position. Specifically, the screening apparatus stores a mapping relationship among a preset image position, a target character corresponding to the target pixel, and a combination number corresponding to the target character, so that the target character corresponding to the target pixel and the combination number corresponding to the target character can be determined according to the preset image position and the mapping relationship, for example, if the preset image position is the upper left corner of the projection image, the target character corresponding to the target pixel is the high-order of the character string corresponding to the brightness value of the target pixel, and the combination number of the target character is 3.
After the combination serial number of each target character is determined, each target character is combined according to the combination serial number to obtain a verification character string, and therefore verification information is determined according to the verification character string. The verification information may be a character string, that is, the verification character string is the verification information.
The verification information may also be at least one of a figure, a character, a number, and a letter, and at this time, the verification character string needs to be analyzed to obtain the corresponding verification information. Specifically, each verification character string is re-segmented to obtain a plurality of sub character strings, one sub character string represents one letter, figure, character or letter, after each sub character string is analyzed, a symbol corresponding to the sub character string is obtained, the symbol is also one letter, figure, character or letter, and therefore verification information is obtained by combining all the symbols. It should be noted that, after the verification character string is divided into a plurality of sub character strings to obtain each character, the combination serial number of each symbol may be determined according to the position of each sub character string in the verification character string to combine each symbol again, and each symbol after combination is the verification information.
In addition, after the verification information is determined, the verification information can be output, namely, the verification information can be displayed on a display screen of the screening device, or the verification information is sent to a user terminal, so that a user can judge whether the projector is a preset type projector.
Step S30, when the verification information is consistent with preset verification information, determining that the projector is a preset type projector, wherein when the projector is the preset type projector and the projector projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image;
after the verification information is obtained, the discrimination device judges whether the verification information is consistent with the preset verification information, and if so, the projector is judged to be a preset type of projector, namely, the projector is a genuine product. The user can identify the authenticity of the projector based on the discrimination method, so that the situation that the projector is cheated to be ordered is avoided, and a manufacturer can judge whether the projector is illegally sold according to the discrimination result, so that measures are taken for illegal selling in time, and the influence on the brand effect of the projector is reduced.
In addition, after the screening device determines the screening result, the screening result is output to prompt the user.
In the technical scheme provided by this embodiment, when a projector of a preset type projects a projection image of a preset frame, the brightness value of a target pixel corresponding to a preset image position in the projection image is changed, so that when it is determined whether the projector is the projector of the preset type, the brightness value of the target pixel corresponding to the preset image position is determined in the projection image of the preset frame, a character string corresponding to the brightness value is determined, verification information is obtained according to a target character in the character string, and if the verification information is consistent with the preset verification information, the projector is the projector of the preset type, so that a user and a manufacturer can determine the authenticity of the projector.
As an implementation, the projector may be as shown in fig. 4.
The embodiment of the invention relates to a projector, which comprises: a processor 104, such as a CPU, a memory 105, and a communication bus 106. Wherein the communication bus 106 is used to enable connection communication between these components.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). As shown in fig. 1, the memory 103, which is a kind of computer storage medium, may include therein an information adding program of the projector; and the processor 104 may be configured to call the information adding program of the projector stored in the memory 105, and perform the following operations:
acquiring preset verification information when a projected image of a preset frame is projected;
and changing the set brightness value of the target pixel at the preset image position in the projected image according to preset verification information so as to add the preset verification information to the image projected by the projector.
In one embodiment, the processor 104 may be configured to call the information adding program of the projector stored in the memory 105, and perform the following operations:
determining a set brightness value of the target pixel, and determining a character string corresponding to the set brightness value;
determining a target character corresponding to the target pixel according to the preset verification information;
and determining a target position of the character string, and changing a character corresponding to the target position in the character string into a target character so as to change the set brightness value of the target pixel.
In one embodiment, the processor 104 may be configured to call the information adding program of the projector stored in the memory 105, and perform the following operations:
the step of determining the target character corresponding to the target pixel according to the preset verification information comprises:
determining a preset verification character string corresponding to the preset verification information;
and determining a target character corresponding to the target pixel in the preset verification character string according to the frame number of the projected image and the preset image position.
In one embodiment, the processor 104 may be configured to call the information adding program of the projector stored in the memory 105, and perform the following operations:
and determining the target position of the character string according to the frame number of the projected image and the preset image position.
In one embodiment, the processor 104 may be configured to call the information adding program of the projector stored in the memory 105, and perform the following operations:
the preset image position is a vertex angle area in the projected image, a plurality of target pixels are arranged in the vertex angle image area, each target pixel is adjacent and is located at the boundary of the projected image, and at least one target pixel is the vertex angle pixel.
According to the scheme, when the projector projects the projected image of the preset frame, the preset verification information is obtained, the set brightness value of the target pixel at the preset image position in the projected image is changed according to the preset verification information, and therefore the preset verification information is hidden and added to the projected image, and the subsequent screening work of the projector is facilitated.
Based on the hardware architecture of the projector, the embodiment of the information adding method of the projector is provided.
Referring to fig. 5, fig. 5 is a first embodiment of information addition of the projector according to the present invention, the information addition of the projector includes the following steps:
step S100, when a projection image of a preset frame is projected, preset verification information is obtained;
and S200, changing the set brightness value of the target pixel at the preset image position in the projected image according to preset verification information so as to add the preset verification information to the image projected by the projector. In the invention, an information adding program of the projector is arranged in the optical-mechanical module of the projector, when the projector projects a projected image of a preset frame, the projector can change the set brightness value of a target pixel at a preset image position in the projected image, so that the information that the projector is a genuine product is hidden in the image projected by the projector by changing the brightness value.
When each projector is produced, preset verification information can be stored in the projector, the preset verification information represents that the projector is a genuine product, and the preset verification information can be at least one of characters, figures, numbers or letters. When the projector manufacturer is not a direct vendor, the preset authentication information may be information characterizing an agent or information specifying a manufacturer, for example, a company name sold by an authorized agent is Goertek, and the preset authentication information may be set to Goertek.
The information adding program of the projector adds preset verification information into a projection image of the projector, specifically, each pixel in the projection image has a corresponding brightness value, and the brightness value may be represented by a set of codes, that is, the brightness value has a unique character string, the length of the character string may be one byte, and the character string may be represented by binary code, of course, not limited to binary code, but also may be 8-ary, 16-ary, and the like;
then, the projector compiles the preset verification information into a verification character string, and splits the verification character string to obtain a plurality of target characters, wherein it can be understood that the preset verification information can be obtained by decoding the spliced target characters;
in addition, because the set brightness value of the target pixel needs to be changed, in order to reduce the influence on the display quality of the projected image to the maximum extent, the target pixel should be a boundary position in the projected image, preferably four vertex angles of the projected image, namely the preset image position is preferably a vertex angle area of the projected image;
after the target pixel is determined, further determining a set brightness value of the target pixel, wherein a plurality of target pixels are taken in a vertex angle area for facilitating the determination of the set brightness value of the target pixel and preventing noise interference, and all the target pixels are adjacent and positioned at the boundary of a projected image;
the projector determines character strings corresponding to the set brightness values and determines target positions of the character strings, specifically, a target pixel corresponds to a preset image position, the preset image position corresponds to a frame number of a projected image, the projector stores the mapping relation among the target position, the preset image position and the frame number in the character strings corresponding to the target pixel, the projector can determine the target positions of the character strings according to the mapping relation, the frame number and the preset image position, and characters corresponding to the target positions are characters to be changed;
after determining the target position corresponding to each character string, changing the character corresponding to the target position into the target character corresponding to the character string, where it is noted that, after obtaining a plurality of target characters, the projector may assign a corresponding target character to each target pixel, and when determining the target character corresponding to the target pixel of the projector, it may determine a preset image position corresponding to the target pixel and a frame number of the projected image first, so as to associate the target character with the preset image position corresponding to the target pixel and the frame number of the projected image, and after determining the target position in the character string corresponding to the target pixel, it may determine the corresponding target character according to the association information, so as to change the character corresponding to the target position into the target character.
For ease of understanding, the information addition of the projector is illustrated.
Presetting validation information as Goertek, splitting the validation information into 7 letters, namely G, o, e, r, t, e and k, and then endowing each letter with a character string, wherein one character string represents one letter, for example, the character string of G is 01000111, the character string of 0 is 01101111, the character string of e is 01100101, and the character string of r is 01100101, and it needs to be noted that when the character string of the brightness value is binary coding, the character string of the preset validation information is also binary coding;
then, determining a target pixel needing to change a brightness value, wherein a character string of one letter corresponds to eight vertex angle regions, and a frame of projection image has four vertex angle regions, determining vertex angle regions of two frames of projection images, for example, eight vertex angle regions b0-b7 in projection images of a first frame and a thirtieth frame, wherein b0 represents a last numerical value in a G character string 01000111, namely 1, b2 represents two numerical values of a reciprocal of the G character string 01000111, namely 1, and so on, b7 represents a first numerical value 0 in the G character string;
b0-b7 have corresponding numerical values, then the brightness value of the target pixel in the vertex angle region is changed, the brightness value has a corresponding character string, the character of the set position of each target pixel in the b0 region is changed to 0, for example, the set position can be the low position of the character string (the character string has a length of one byte, so the character string has a corresponding high position and a low position), that is, the character of the last four bits of the character string is changed to 0, the changed character is the target character, of course, the set position can also be set to the high position of the character string, which is not limited, it needs to be explained that, because one vertex angle region has a plurality of target pixels, for example, the vertex angle region of b0 is provided with four target pixels, so the last four bits of the four target pixels are changed to 0.
In order to enhance the secrecy of the preset verification text information, that is, to make the preset verification text information not easy to crack, the corner regions may be placed in the projection images of different frames, and the combination sequence of the target characters in the corner regions may be disturbed, for example, the combination sequence originally from b0-b7 may now be changed to the combination sequence from b1, b3, b4, b7, b2, b5, and b 6. In addition, the set positions of the characters to be changed of the target pixels in the vertex angle regions can be determined according to the frame numbers of the projection images in the vertex angle regions, for example, in the first frame of projection image, the positions of all the characters to be changed are the high positions of the character strings, and in the thirtieth frame of projection image, the positions of all the characters to be changed are the low positions of the character strings.
In the technical scheme provided by this embodiment, when the projector projects a projected image of a preset frame, preset verification information is acquired, and a set brightness value of a target pixel at a preset image position in the projected image is changed according to the preset verification information, so that the preset verification information is hidden and added to the projected image, and the subsequent screening work of the projector is facilitated.
The invention also provides a screening device of a projector, which comprises a processor, a memory and a screening program of the projector, wherein the screening program of the projector is stored in the memory and can be operated on the processor, and when the screening program of the projector is executed by the processor, the screening device of the projector realizes the steps of the screening method of the projector according to the embodiment.
The invention further provides a storage medium, which stores a screening program of the projector, and the screening program of the projector realizes the steps of the screening method of the projector according to the above embodiment when being executed by the processor.
The invention also provides a projector, which comprises a processor, a memory and an information adding program of the projector, wherein the information adding program of the projector is stored on the memory and can run on the processor, and when the information adding program of the projector is executed by the processor, the information adding program of the projector realizes the steps of the information adding method of the projector according to the embodiment.
The present invention also provides a storage medium storing an information adding program of a projector, wherein the information adding program of the projector realizes the steps of the information adding method of the projector according to the above embodiment when executed by the processor.
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.
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 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. 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 apparatus that comprises the element.
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 solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (15)
1. The projector screening method is characterized by comprising the following steps:
determining the brightness value of a target pixel corresponding to a preset image position in a projected image of a preset frame projected by a projector, and determining a character string corresponding to each brightness value;
determining verification information according to target characters in the character strings;
when the verification information is consistent with preset verification information, the projector is judged to be a preset type projector, wherein when the projector is the preset type projector and projects a projected image of a preset frame, the projector changes the brightness value of a target pixel corresponding to a preset image position in the projected image.
2. The projector screening method according to claim 1, wherein the step of determining the verification information based on the target character in each of the character strings includes:
determining target characters of the character strings and combination serial numbers corresponding to the target characters;
combining the target characters according to the combination serial numbers to obtain verification character strings;
and determining the verification information according to the verification character string.
3. The projector screening method according to claim 2, wherein the step of determining the verification information based on the verification string includes:
dividing the verification character string into a plurality of sub character strings, and analyzing each sub character string to obtain a symbol corresponding to each sub character string, wherein the symbol is a number, a letter, a figure or a character;
and determining the verification information according to the symbol corresponding to each substring.
4. The projector screening method according to claim 2, wherein the step of determining the target character of each of the character strings and the combination serial number corresponding to each of the target characters includes:
and determining target characters of the character strings and combination serial numbers corresponding to the target characters according to the preset image positions corresponding to the character strings.
5. The method for screening a projector according to claim 1, wherein the step of determining the brightness value of the target pixel corresponding to the preset image position in the projection image of the preset frame projected by the projector further includes:
controlling a camera to acquire a projected image of a preset frame projected by the projector, wherein the shooting frequency of the camera is consistent with the playing frequency of the projector;
or receiving a projected image of a preset frame sent by the projector.
6. The projector screening method according to any one of claims 1 to 5, wherein the preset image position is a vertex angle region in the projection image, a plurality of target pixels are provided in the vertex angle region, each of the target pixels is adjacent to and located at a boundary of the projection image, and at least one of the target pixels is a vertex angle pixel.
7. An information adding method of a projector, characterized in that the information adding method of the projector comprises the following steps:
acquiring preset verification information when a projected image of a preset frame is projected;
and changing the set brightness value of the target pixel at the preset image position in the projected image according to preset verification information so as to add the preset verification information to the image projected by the projector.
8. The information adding method of a projector according to claim 7, wherein the step of changing the set luminance value of the target pixel at the preset image position in the projected image based on the preset authentication information includes:
determining a set brightness value of the target pixel, and determining a character string corresponding to the set brightness value;
determining a target character corresponding to the target pixel according to the preset verification information;
and determining a target position of the character string, and changing a character corresponding to the target position in the character string into the target character so as to change the set brightness value of the target pixel.
9. The information adding method of a projector according to claim 8, wherein the step of determining the target character corresponding to the target pixel based on the preset authentication information includes:
determining a preset verification character string corresponding to the preset verification information;
and determining a target character corresponding to the target pixel in the preset verification character string according to the frame number of the projected image and the preset image position.
10. The information adding method of a projector according to claim 8, wherein the step of determining the target position of the character string includes:
and determining the target position of the character string according to the frame number of the projected image and the preset image position.
11. The information adding method of a projector according to any one of claims 7 to 10, wherein the preset image position is a vertex region in the projected image, and a plurality of target pixels are provided in the vertex region, each of the target pixels is adjacent and located at a boundary of the projected image, and at least one of the target pixels is a vertex pixel.
12. A screening apparatus for a projector, the apparatus comprising a processor, a memory, and a screening program for a projector stored in the memory and executable on the processor, wherein the screening program for a projector, when executed by the processor, implements the steps of the screening method for a projector according to any one of claims 1 to 6.
13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a screening program of a projector, which when executed by a processor implements the steps of the screening method of the projector according to any one of claims 1 to 6.
14. A projector comprising a processor, a memory, and an information adding program of the projector stored on the memory and executable on the processor, wherein the information adding program of the projector realizes the steps of the information adding method of the projector according to any one of claims 7 to 11 when executed by the processor.
15. A computer-readable storage medium, characterized in that the storage medium stores an information adding program of a projector, which when executed by a processor realizes the steps of the information adding method of the projector according to any one of claims 7 to 11.
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| JP2017041090A (en) * | 2015-08-19 | 2017-02-23 | 株式会社リコー | Information processing system, authentication method, information processing apparatus, and authentication program |
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| CN1327673A (en) * | 1999-10-15 | 2001-12-19 | 皇家菲利浦电子有限公司 | Image and video authentication system |
| CN1527585A (en) * | 2003-03-05 | 2004-09-08 | 刘瑞祯 | Safe digital information transmitting and applying method |
| CN1910900A (en) * | 2004-01-22 | 2007-02-07 | 索尼株式会社 | Unauthorized copy preventing device and method thereof, and program |
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