CN111901577A - Instant projection system based on signal analysis and corresponding terminal - Google Patents
Instant projection system based on signal analysis and corresponding terminal Download PDFInfo
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- CN111901577A CN111901577A CN202010039569.4A CN202010039569A CN111901577A CN 111901577 A CN111901577 A CN 111901577A CN 202010039569 A CN202010039569 A CN 202010039569A CN 111901577 A CN111901577 A CN 111901577A
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- human body
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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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Abstract
The invention relates to an instant projection system based on signal analysis and a corresponding terminal, wherein the system comprises: an object identification device for identifying individual human objects in the signal filtered image based on human imaging characteristics and for identifying individual baggage objects in the signal filtered image based on baggage imaging characteristics; a distance analysis device for performing the following actions for each human subject: and when the baggage objects with the distance from the human body objects to the pixel points smaller than the preset number exist in the depth of field range taking the depth of field value of the human body objects in the signal filtering image as the central value, determining the existing baggage objects as the related baggage objects of the human body objects. The instant projection system based on signal analysis and the corresponding terminal have simple structures, and are convenient and practical. Because the small piece of luggage inspection-free channel is subjected to customized identification operation and projection prompt, the evading security check behavior of a person carrying a large piece of luggage to pass through the small piece of luggage inspection-free channel is avoided.
Description
Technical Field
The invention relates to the field of subway security, in particular to an instant projection system based on signal analysis and a corresponding terminal.
Background
Subway security is an inspection procedure which must be performed by personnel entering the subway, and is an important precaution measure for guaranteeing personal safety of passengers.
The subway security guard is used for ensuring the personal safety of all passengers entering the subway, so that all passengers entering the subway can be allowed to enter the subway after being inspected without exception, namely, the subway security guard does not have any special inspection-free object. All personnel entering the subway must accept subway security.
The content of subway security is mainly to check whether dangerous articles such as guns, ammunition, explosive, corrosive, toxic and radioactive are carried in passengers and luggage articles thereof so as to ensure the safety of the subway and the passengers. The subway security must be carried out before passengers enter the subway, inspectors are not allowed to enter the subway, and severe persons can be handed over to police for processing.
The subway security has three general inspection methods, one is X-ray security inspection equipment, mainly used for inspecting passenger's luggage. The second is a detection inspection door which is used for physical inspection of passengers and mainly used for inspecting whether the passengers carry forbidden articles or not; and the magnetic detector, also called a portable detector, is mainly used for carrying out close-up inspection on passengers.
The principle of subway security is that an object is seen through by X rays, so that dangerous goods are detected. The X-ray dose in the security inspection instrument is less, the X-ray property only plays a role in perspective and does not remain on the object which is subjected to perspective, and therefore the security inspection instrument does not need to worry that the radiation generated by the security inspection instrument on the bag can influence the human health.
It should be noted that, when the security inspection is not performed as soon as possible, the handle is inserted into the security inspection machine to pick up the package, after all, the ray is vertically irradiated in the machine, and the hand is irradiated when the hand is inserted into the machine. Therefore, the safety inspection is properly accepted, and the health of people is not harmful.
Disclosure of Invention
In order to solve the technical problems in the related field, the invention provides an instant projection system based on signal analysis, which can intelligently detect whether each human target in a small piece of luggage inspection-free channel carries large pieces of luggage or not, and determine whether to remind related human targets to carry out large piece of luggage inspection or not based on a detection result, so that the phenomenon of missing inspection of the luggage is avoided.
Therefore, the invention needs to have the following two key points:
(1) the method comprises the steps that a visual detection mechanism is adopted to effectively identify personnel carrying large luggage at a subway entrance, and an instant projection mode is adopted to remind the personnel to carry out luggage security check, so that a luggage security check program is standardized;
(2) when the human body object of the baggage object to be detected exists, the actual position of the human body entity corresponding to the human body object is obtained based on the position of the human body object of the baggage object to be detected in the image and the depth of field of the human body object in the image, and the actual position is wirelessly notified to a mobile terminal of a nearby security personnel.
According to an aspect of the present invention, there is provided a system for on-the-fly projection based on signal analysis, the system comprising:
the miniature imaging equipment is arranged at the subway entrance and used for performing real-time imaging operation on the inspection-free channel carrying the small luggage so as to obtain and output a corresponding field acquisition image;
the midpoint filtering equipment is connected with the miniature imaging equipment and is used for executing midpoint filtering processing on the received field acquisition image so as to obtain a signal filtering image;
the object identification device is connected with the midpoint filtering device and is used for identifying each human object in the signal filtering image based on human imaging characteristics and identifying each luggage object in the signal filtering image based on luggage imaging characteristics;
a distance analysis device connected with the object identification device for performing the following actions for each human object: when a baggage object with a distance from the human body object smaller than a preset number of pixel points exists in a depth of field range taking a depth of field value of the human body object in the signal filtering image as a central value, determining the existing baggage object as a related baggage object of the human body object;
the information extraction device is connected with the distance analysis device and used for executing the following actions for each human body object: when the product of the proportion of a certain associated luggage object occupying the signal filtering image and the depth of field of the processing object exceeds the limit, determining the associated luggage object as a luggage object to be detected;
the instant projection equipment is arranged near the miniature imaging equipment, is connected with the information extraction equipment, and is used for executing projection operation on a human body entity corresponding to the human body object with the baggage object to be detected based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image;
and the wireless notification equipment is connected with the information extraction equipment and is used for acquiring the actual position of the human body entity corresponding to the human body object based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image when the human body object with the baggage object to be detected exists, and wirelessly notifying the actual position to a mobile terminal of a nearby security personnel.
According to another aspect of the present invention, there is also provided an instant projection terminal based on signal analysis, wherein the terminal comprises: a memory and a processor, the processor coupled to the memory; the memory for storing executable instructions of the processor; the processor is used for calling the executable instructions in the memory so as to realize the method for positioning and projecting the personnel carrying the large luggage at the entrance of the subway in real time by using the instant projection system based on the signal analysis.
The instant projection system based on signal analysis and the corresponding terminal have simple structures, and are convenient and practical. Because the small piece of luggage inspection-free channel is subjected to customized identification operation and projection prompt, the evading security check behavior of a person carrying a large piece of luggage to pass through the small piece of luggage inspection-free channel is avoided.
Detailed Description
Embodiments of the instant projection system based on signal analysis and the corresponding terminal of the present invention will be described in detail below.
A projector, also called a projector, is a device that can project images or videos onto a curtain, and can be connected with a computer, a VCD, a DVD, a BD, a game machine, a DV, etc. through different interfaces to play corresponding video signals.
Projectors are widely used in homes, offices, schools and entertainment places at present, and have different types such as CRT, LCD and DLP according to different working modes.
Light sources used for projectors include conventional high-intensity gas discharge light sources (e.g., ultra-high pressure mercury lamps, short arc xenon lamps, metal halide lamps) and novel light sources typified by LED light sources and laser light sources. The conventional light source projector generally makes the projected image darken and turn yellow (such as brightness attenuation, color saturation contrast reduction and the like) along with the attenuation of the emergent light of the light source after being used for a period of time, and in a use occasion with higher requirements on image quality, even if the bulb still emits light, the bulb has to be replaced accordingly. The light attenuation is a major obstacle that cannot be overcome by the conventional light source. With the development of semiconductor lighting technology and laser technology, LED light sources and laser light sources have been rapidly developed in the lighting field and widely applied in the display field. The LED is the earliest product used for the projector in a novel light source, and because the LED can enable the imaging structure of the projector to be simpler, the projector product which is smaller in size, easy to carry and simple to use brings great convenience to teaching, business and personal entertainment. Meanwhile, the laser is used as a brand new projection light source, the defects of a projector using the traditional light source in the aspects of brightness attenuation, color, power consumption and the like are overcome, and the laser has the characteristic of being on and on as the laser belongs to a cold light source, so that the phenomena of waiting for starting and stable light emission of the traditional light source are fundamentally eliminated.
At present, in order to improve the security check efficiency while ensuring the security check effect at the entrance of a subway, a small piece of luggage non-check channel and a large piece of luggage special check channel are usually arranged, the small piece of luggage non-check channel belongs to the luggage non-check channel which only carries out security check on a human body but does not carry out security check on the luggage, however, in this way, scanning and detection of the large piece of luggage are possibly avoided for some lawbreakers.
In order to overcome the defects, the invention builds an instant projection system based on signal analysis and a corresponding terminal, and can effectively solve the corresponding technical problem.
An on-the-fly projection system based on signal analysis is shown according to an embodiment of the invention comprising:
the miniature imaging equipment is arranged at the subway entrance and used for performing real-time imaging operation on the inspection-free channel carrying the small luggage so as to obtain and output a corresponding field acquisition image;
the midpoint filtering equipment is connected with the miniature imaging equipment and is used for executing midpoint filtering processing on the received field acquisition image so as to obtain a signal filtering image;
the object identification device is connected with the midpoint filtering device and is used for identifying each human object in the signal filtering image based on human imaging characteristics and identifying each luggage object in the signal filtering image based on luggage imaging characteristics;
a distance analysis device connected with the object identification device for performing the following actions for each human object: when a baggage object with a distance from the human body object smaller than a preset number of pixel points exists in a depth of field range taking a depth of field value of the human body object in the signal filtering image as a central value, determining the existing baggage object as a related baggage object of the human body object;
the information extraction device is connected with the distance analysis device and used for executing the following actions for each human body object: when the product of the proportion of a certain associated luggage object occupying the signal filtering image and the depth of field of the processing object exceeds the limit, determining the associated luggage object as a luggage object to be detected;
the instant projection equipment is arranged near the miniature imaging equipment, is connected with the information extraction equipment, and is used for executing projection operation on a human body entity corresponding to the human body object with the baggage object to be detected based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image;
and the wireless notification equipment is connected with the information extraction equipment and is used for acquiring the actual position of the human body entity corresponding to the human body object based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image when the human body object with the baggage object to be detected exists, and wirelessly notifying the actual position to a mobile terminal of a nearby security personnel.
Next, the detailed structure of the instant projection system based on signal analysis according to the present invention will be further described.
In the instant projection system based on signal analysis:
the baggage screening-free channel carrying the small pieces of baggage is a baggage screening-free channel which only carries out security screening on a human body but not carries out security screening on the baggage.
In the instant projection system based on signal analysis:
the distance analysis equipment is realized by adopting a programmable logic device, and the programmable logic device is designed by adopting VHDL.
In the instant projection system based on signal analysis:
the information extraction equipment is a non-bus type single chip microcomputer, and a timer and a ROM (read only memory) are arranged in the non-bus type single chip microcomputer.
In the instant projection system based on signal analysis:
and the distance analysis equipment and the information extraction equipment are in data connection and data interaction through a 16-bit parallel data interface.
The instant projection system based on signal analysis can further comprise:
and the hard disk equipment is used for storing various configuration parameters of the distance analysis equipment.
In the instant projection system based on signal analysis:
the hard disk equipment adopts rubber shock absorption, steel wire shock absorption or electronic shock absorption.
The instant projection system based on signal analysis can further comprise:
and the pickup equipment is positioned near the distance analysis equipment and is used for acquiring real-time audio data of the environment where the distance analysis equipment is positioned in real time.
Meanwhile, in order to overcome the above disadvantages, the present invention also builds an instant projection terminal based on signal analysis, wherein the terminal comprises: a memory and a processor, the processor coupled to the memory;
wherein the memory is used for storing executable instructions of the processor;
the processor is used for calling the executable instructions in the memory so as to realize the method for positioning and projecting the personnel carrying the large luggage at the subway entrance in real time by using the instant projection system based on the signal analysis.
In addition, VHDL is mainly used to describe the structure, behavior, function, and interface of a digital system. Except for the fact that it contains many statements with hardware features, the linguistic form, description style, and syntax of VHDL are very similar to a general computer high-level language. The structural features of the VHDL program are to divide an engineering design, or design entity (which may be a component, a circuit module or a system) into an external (or visible part and a port) and an internal (or invisible part), which relate to the internal functions and algorithm completion of the entity. After an external interface is defined for a design entity, once its internal development is complete, other designs can invoke the entity directly. This concept of dividing the design entity into inner and outer parts is the fundamental point of VHDL system design.
VHDL has powerful language structure, and can describe complex logic control by simple and clear source code. The method has a multi-level design description function, is refined layer by layer, and can directly generate circuit level description. VHDL supports the design of synchronous, asynchronous, and random circuits, which is incomparable with other hardware description languages. VHDL also supports various design methods, both bottom-up and top-down; the method supports both modular design and hierarchical design.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. An on-the-fly projection system based on signal analysis, comprising:
the miniature imaging equipment is arranged at the subway entrance and used for performing real-time imaging operation on the inspection-free channel carrying the small luggage so as to obtain and output a corresponding field acquisition image;
the midpoint filtering equipment is connected with the miniature imaging equipment and is used for executing midpoint filtering processing on the received field acquisition image so as to obtain a signal filtering image;
the object identification device is connected with the midpoint filtering device and is used for identifying each human object in the signal filtering image based on human imaging characteristics and identifying each luggage object in the signal filtering image based on luggage imaging characteristics;
a distance analysis device connected with the object identification device for performing the following actions for each human object: when a baggage object with a distance from the human body object smaller than a preset number of pixel points exists in a depth of field range taking a depth of field value of the human body object in the signal filtering image as a central value, determining the existing baggage object as a related baggage object of the human body object;
the information extraction device is connected with the distance analysis device and used for executing the following actions for each human body object: when the product of the proportion of a certain associated luggage object occupying the signal filtering image and the depth of field of the processing object exceeds the limit, determining the associated luggage object as a luggage object to be detected;
the instant projection equipment is arranged near the miniature imaging equipment, is connected with the information extraction equipment, and is used for executing projection operation on a human body entity corresponding to the human body object with the baggage object to be detected based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image;
and the wireless notification equipment is connected with the information extraction equipment and is used for acquiring the actual position of the human body entity corresponding to the human body object based on the position of the human body object with the baggage object to be detected in the signal filtering image and the depth of field of the human body object in the signal filtering image when the human body object with the baggage object to be detected exists, and wirelessly notifying the actual position to a mobile terminal of a nearby security personnel.
2. The signal analysis-based on-line projection system of claim 1, wherein:
the baggage screening-free channel carrying the small pieces of baggage is a baggage screening-free channel which only carries out security screening on a human body but not carries out security screening on the baggage.
3. The signal analysis based on point-of-care projection system of claim 2, wherein:
the distance analysis equipment is realized by adopting a programmable logic device, and the programmable logic device is designed by adopting VHDL.
4. The signal analysis based on point-of-care projection system of claim 3, wherein:
the information extraction equipment is a non-bus type single chip microcomputer, and a timer and a ROM (read only memory) are arranged in the non-bus type single chip microcomputer.
5. The signal analysis-based on-line projection system of claim 4, wherein:
and the distance analysis equipment and the information extraction equipment are in data connection and data interaction through a 16-bit parallel data interface.
6. The signal analysis based on-line projection system of claim 5, wherein the system further comprises:
and the hard disk equipment is used for storing various configuration parameters of the distance analysis equipment.
7. The signal analysis-based on-line projection system of claim 6, wherein:
the hard disk equipment adopts rubber shock absorption, steel wire shock absorption or electronic shock absorption.
8. The signal analysis based on-line projection system of claim 7, wherein the system further comprises:
and the pickup equipment is positioned near the distance analysis equipment and is used for acquiring real-time audio data of the environment where the distance analysis equipment is positioned in real time.
9. An on-the-fly projection terminal based on signal analysis, the terminal comprising: a memory and a processor, the processor coupled to the memory;
the memory for storing executable instructions of the processor;
the processor is used for calling the executable instructions in the memory to realize the method for using the instant projection system based on signal analysis according to any one of claims 1-8 to carry out real-time positioning and instant projection on the personnel carrying large luggage at the subway entrance.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112616045A (en) * | 2020-11-17 | 2021-04-06 | 泰州无印广告传媒有限公司 | Projection driving platform and method based on wide-angle photography |
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