CN109028227A - Intelligent range hood and its mobile human body detection method - Google Patents
Intelligent range hood and its mobile human body detection method Download PDFInfo
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- CN109028227A CN109028227A CN201811151658.7A CN201811151658A CN109028227A CN 109028227 A CN109028227 A CN 109028227A CN 201811151658 A CN201811151658 A CN 201811151658A CN 109028227 A CN109028227 A CN 109028227A
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- initial pictures
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- human body
- range hood
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Abstract
A kind of intelligent range hood and its mobile human body detection method machine, image processing unit is handled based on the initial pictures that imaging device acquires, initial pictures are grayscale image, initial pictures collected are serialized, the initial pictures of the initial pictures and previous frame that pass sequentially through rear frame carry out the processing of frame difference, obtain the human motion target area of each rear frame initial pictures.Intelligent range hood mobile human body detection method, specific steps process are as follows: (1) initial pictures of rear frame and the initial pictures of previous frame being carried out frame difference and handle to obtain frame difference image；(2) human motion target area is judged according to the gray average of each subregion of frame difference image, obtains the corresponding human motion target area of rear frame initial pictures.The mobile human body detection method of intelligent range hood of the invention, handles to obtain frame difference image using before and after frames frames differencing, judges mobile human body region by the gray value of frame difference image, can identify mobile human body situation.
Description
Technical field
The present invention relates to kitchen fume processing technology fields, more particularly to a kind of intelligent range hood and its mobile human physical examination
Survey method and oil smoke image identification system and kitchen ventilator.
Background technique
Kitchen is one of configuration of herbal, and the effect of kitchen fume processing directly affects people's lives quality.With
Science and technology continuous development, it is also more and more to the monitoring and processing means of kitchen fume.It is several after traditional smoke exhaust ventilator setting
After a suction gear, has also appeared and kitchen fume concentration is carried out the technology such as to detect.
In the prior art, for the detection of kitchen fume concentration, mainly there are infrared projection method and physical measure.Infrared throwing
It penetrates method and infrared light is emitted by one end, the other end is received, and judges that oil smoke concentration is big by the infrared luminous intensity received
It is small.But there is uncertainty since oil smoke drifts, can also there be manpower in practice and the interference such as block, therefore, it need to be in different location
Multiple infrared transmitters are installed just and can guarantee relatively accurate, the higher cost of oil smoke detection, installation site are required also higher.Object
The principle that detection method is similar to smoke alarm is managed, oil smoke concentration, but this method are judged by floating particle number in detection air
There are two disadvantages can not achieve remote detection first is that detection must just can be carried out when oil smoke touches alarm；Second is that working as
Float in air when being oil smoke but water mist can not detect.
Therefore, it comes into being for the image processing method of oil smoke identification, for the accuracy for ensuring oil smoke image recognition, needs
Exclude the interference such as human body.
Therefore, in view of the shortcomings of the prior art, to provide a kind of intelligent range hood and its mobile human body detection method existing to overcome
There is technical deficiency very necessary.
Summary of the invention
A kind of intelligent range hood and its mobile human are provided it is an object of the invention to avoid in place of the deficiencies in the prior art
Body detecting method can identify mobile human body target area according to imaging picture.
The object of the present invention is achieved by the following technical measures.
A kind of intelligent range hood mobile human body detection method, the initial graph that image processing unit is acquired with imaging device are provided
It is handled as based on, initial pictures are grayscale image, and initial pictures collected are serialized, and pass sequentially through the first of rear frame
Beginning image and the initial pictures of previous frame carry out the processing of frame difference, obtain the human motion target area of each rear frame initial pictures.
Preferably, intelligent range hood mobile human body detection method, specific steps process are as follows:
(1) initial pictures of rear frame and the initial pictures of previous frame frame difference is carried out to handle to obtain frame difference image；
(2) human motion target area is judged according to the gray average of each subregion of frame difference image, at the beginning of obtaining rear frame
The corresponding human motion target area of beginning image.
Preferably, the target area of imaging device acquisition is indicated with region S, and any one frame initial pictures are corresponding region S
Imaging；
Initial pictures are made of m*n pixel,
The gray value of the pixel of frame initial pictures A is indicated afterwards with matrix A H, AH={ ahi,j, ahi,jFrame initial graph after representative
As the i-th row, the corresponding gray value of jth column pixel in A, i is the row where pixel, and j is the column where pixel, 1≤i≤m, 1≤j
≤n；The subregion in frame initial pictures A where the i-th row, jth column pixel is AS afterwardsi,j；
The gray value of the pixel of previous frame initial pictures B indicates with matrix B H, BH={ bhi,j, bhi,jRepresent previous frame initial graph
As the i-th row, the corresponding gray value of jth column pixel in B, the subregion in previous frame initial pictures B where the i-th row, jth column pixel is
BSi,j；
The grey scale pixel value of frame difference image D indicates with matrix D H, DH={ dhi,j}={ | ahi,j-bhi,j|, dhi,jIt represents
I-th row, the corresponding gray value of jth column pixel in frame difference image D, the subregion in frame difference image D where the i-th row, jth column pixel
For DSi,j。
Preferably, in frame difference image, | dhi,j|=0 region is in black；|dhi,j| ≠ 0 region is in be highlighted.
Preferably, the step (2) is specifically: gray value in statistics frame difference image D | dhi,jThe subregion of | > θ is as shifting
Moving body target area, remaining regional determination are non-moving human region；
Wherein, θ is threshold value, and θ is more than or equal to 25.
Preferably, θ is equal to 30.
Present invention simultaneously provides a kind of intelligent range hoods, are provided with,
Visual imaging module carries out continuous imaging to target area, and the Video stream information that picture is imaged is sent to place
Manage module；
Processing module receives the Video stream information for the imaging picture that visual imaging module is sent and is handled to obtain smog
Information, by smog information conveyance to blast velocity control module；
Blast velocity control module carries out wind speed adjusting according to the smog information controlled wind speed adjuster that processing module is sent；
The processing module adopts the mobile human body target area after judgement with the aforedescribed process in frame initial pictures.
Preferably, visual imaging module is provided with camera, and camera assembles 180 ° of wide-angle lens, and camera is built in smoke machine main body
Shell, the output end of camera is electrically connected with processing module, and a part of visual zone of 180 ° of wide-angle lens covers hearth region,
The human body working region of a part of visual zone covering hearth upper outer of 180 ° of wide-angle lens.
Preferably, above-mentioned visual imaging module is additionally provided with light compensating lamp, the imaging of the irradiation area covering camera of light compensating lamp
Field range.
Preferably, above-mentioned light compensating lamp is infrared light compensating lamp.
Intelligent range hood and its mobile human body detection method of the invention, it is poor to handle to obtain frame using before and after frames frames differencing
Image judges mobile human body region by the gray value of frame difference image, can identify mobile human body situation.
Figure of description
Using attached drawing, the present invention is further illustrated, but the content in attached drawing is not constituted to any limit of the invention
System.
Fig. 1 is the structural schematic diagram of intelligent range hood through the invention.
Fig. 2 is the structural schematic diagram of another angle of Fig. 1.
In Fig. 1, Fig. 2, comprising:
Smoke machine main body 100, camera 200, infrared light compensating lamp 300, hearth 400.
Specific embodiment
The invention will be further described with the following Examples.
Embodiment 1.
A kind of intelligent range hood mobile human body detection method, image processing unit are made with the initial pictures that imaging device acquires
Based on handled, initial pictures are grayscale image, and initial pictures collected are serialized, and pass sequentially through the initial graph of rear frame
As carrying out the processing of frame difference with the initial pictures of previous frame, the human motion target area of each rear frame initial pictures is obtained.
Preferably, intelligent range hood mobile human body detection method, specific steps process are as follows:
(1) initial pictures of rear frame and the initial pictures of previous frame frame difference is carried out to handle to obtain frame difference image；
(2) human motion target area is judged according to the gray average of each subregion of frame difference image, at the beginning of obtaining rear frame
The corresponding human motion target area of beginning image.
Preferably, the target area of imaging device acquisition is indicated with region S, and any one frame initial pictures are corresponding region S
Imaging；
Initial pictures are made of m*n pixel,
The gray value of the pixel of frame initial pictures A is indicated afterwards with matrix A H, AH={ ahi,j, ahi,jFrame initial graph after representative
As the i-th row, the corresponding gray value of jth column pixel in A, i is the row where pixel, and j is the column where pixel, 1≤i≤m, 1≤j
≤n；The subregion in frame initial pictures A where the i-th row, jth column pixel is AS afterwardsi,j；
The gray value of the pixel of previous frame initial pictures B indicates with matrix B H, BH={ bhi,j, bhi,jRepresent previous frame initial graph
As the i-th row, the corresponding gray value of jth column pixel in B, the subregion in previous frame initial pictures B where the i-th row, jth column pixel is
BSi,j；
The grey scale pixel value of frame difference image D indicates with matrix D H, DH={ dhi,j}={ | ahi,j-bhi,j|, dhi,jIt represents
I-th row, the corresponding gray value of jth column pixel in frame difference image D, the subregion in frame difference image D where the i-th row, jth column pixel
For DSi,j。
Preferably, in frame difference image, | dhi,j|=0 region is in black；|dhi,j| ≠ 0 region is in be highlighted.
Preferably, the step (2) is specifically: gray value in statistics frame difference image D | dhi,j| the subregion of > θ is as shifting
Moving body target area, remaining regional determination are non-moving human region；
Wherein, θ is threshold value, and θ is more than or equal to 25.
Preferably, θ is equal to 30.
Intelligent range hood and its mobile human body detection method of the invention, it is poor to handle to obtain frame using before and after frames frames differencing
Image judges mobile human body region by the gray value of frame difference image, can identify mobile human body situation.
Embodiment 2.
A kind of intelligent range hood, is provided with
Visual imaging module is assemblied in smoke machine main body, carries out continuous imaging, and the video that picture will be imaged to target area
Stream information is sent to processing module；
Processing module receives the Video stream information for the imaging picture that visual imaging module is sent and is handled to obtain smog
Information, by smog information conveyance to blast velocity control module；Wherein, processing module is initial using frame after the method judgement of embodiment 1
Mobile human body target area in image；
Blast velocity control module carries out wind speed adjusting according to the smog information controlled wind speed adjuster that processing module is sent.
As shown in Figure 1, and camera 400 target area of camera lens face hearth, output end and the processing module of camera be electrically connected
It connects.Captured picture is sent to processing module and handled by camera for carrying out shooting imaging to hearth region.
Camera is equipped with waterproof, antifog, Smoke prevention eyeglass and anti-blur glass, avoids the water in actual use above petticoat pipe
Vapour, oil smoke impact camera, and anti-blur glass can ensure that camera can effectively be imaged under various circumstances.Handle mould
Block can be the chip of STM32 model.
Specifically, visual imaging module is provided with camera 200, camera 200 is built in the shell of smoke machine main body 100, camera
Output end be electrically connected with processing module.Camera is used to carry out target area shooting imaging, and captured picture is sent
It is handled to processing module.
Camera assembles 180 ° of wide-angle lens, and a part of visual zone of 180 ° of wide-angle lens covers hearth region, 180 ° wide
The human body working region of a part of visual zone covering hearth upper outer of angle mirror head.Target area is acquired by wide-angle lens
Domain, can differentiate for processing module whether there is mobile human body object below smoke machine.
In addition, visual imaging module is additionally provided with light compensating lamp, the visual field model of the irradiation area covering camera of light compensating lamp
It encloses.It is preferred that light compensating lamp is infrared light compensating lamp.
Ensure that image quality, visual imaging module are additionally provided with infrared light compensating lamp 300, the irradiation of infrared light compensating lamp 300
The visual field range of region overlay camera 200, infrared light compensating lamp 300 are fixed on the shell of smoke machine main body 100, and infrared light filling
Lamp 300 is distributed in two side positions of camera 200.The setting of infrared lamp can shine imaging region when camera 200 is imaged
It penetrates, infrared light compensating lamp 300 can allow smoke characteristics more preferably obvious, be more readily detected in vision.There is no the photograph of infrared light compensating lamp 300
Smoke characteristics are unobvious under the conditions of penetrating.The on-off of infrared light compensating lamp 300 is controlled by relay, and relay is electrically connected with processing module
It connects and is controlled by processing module.
Camera 200 is equipped with waterproof, antifog, Smoke prevention eyeglass and anti-blur glass, avoids in actual use above petticoat pipe
Steam, oil smoke impact camera 200, the fuzzy glass in side can ensure camera 200 under various circumstances can effectively at
Picture.
In addition, 100 shell of smoke machine main body is also equipped with dust-proof, Water-proof and oil-proof functional layer, using smoke machine main body 100
In do not influenced by cigarette, dirt, water mist.
The mobile human body detection method of intelligent range hood of the invention handles to obtain frame difference figure using before and after frames frames differencing
Picture judges mobile human body region by the gray value of frame difference image, can identify mobile human body situation.
Visual imaging module is assemblied in smoke machine main body in the present embodiment, it should be noted that the installation of visual imaging module
Position is not limited to smoke machine main body in the present embodiment, can also the person's of being assemblied in smoke machine installation wall or be assemblied in around hearth
Or it is set to the peripheral location of other smoke machine main bodys, it can be to hearth corresponding position as long as can satisfy visual imaging module
Target area imaging.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should be managed
Solution, can with modification or equivalent replacement of the technical solution of the present invention are made, without departing from technical solution of the present invention essence and
Range.
Claims (10)
1. a kind of intelligent range hood mobile human body detection method, which is characterized in that image processing unit is acquired with imaging device
It is handled based on initial pictures, initial pictures are grayscale image, and initial pictures collected are serialized, after passing sequentially through
The initial pictures of frame and the initial pictures of previous frame carry out the processing of frame difference, obtain the human motion target area of each rear frame initial pictures
Domain.
2. intelligent range hood mobile human body detection method according to claim 1, which is characterized in that specific steps process is such as
Under:
(1) initial pictures of rear frame and the initial pictures of previous frame frame difference is carried out to handle to obtain frame difference image；
(2) human motion target area is judged according to the gray average of each subregion of frame difference image, obtains rear frame initial graph
As corresponding human motion target area.
3. intelligent range hood mobile human body detection method according to claim 2, which is characterized in that
The target area of imaging device acquisition indicates that any one frame initial pictures are the imaging of corresponding region S with region S；
Initial pictures are made of m*n pixel,
The gray value of the pixel of frame initial pictures A is indicated afterwards with matrix A H, AH={ ahi,j, ahi,jFrame initial pictures A after representative
In the i-th row, the corresponding gray value of jth column pixel, i be pixel where row, j be pixel where column, 1≤i≤m, 1≤j≤
n；The subregion in frame initial pictures A where the i-th row, jth column pixel is AS afterwardsi,j；
The gray value of the pixel of previous frame initial pictures B indicates with matrix B H, BH={ bhi,j, bhi,jRepresent previous frame initial pictures B
In the i-th row, the corresponding gray value of jth column pixel, the subregion in previous frame initial pictures B where the i-th row, jth column pixel is
BSi,j；
The grey scale pixel value of frame difference image D indicates with matrix D H, DH={ dhi,j}={ | ahi,j-bhi,j|, dhi,jIt is poor to represent frame
I-th row, the corresponding gray value of jth column pixel in image D, the subregion in frame difference image D where the i-th row, jth column pixel are
DSi,j。
4. intelligent range hood mobile human body detection method according to claim 3, which is characterized in that in frame difference image, |
dhi,j|=0 region is in black；|dhi,j| ≠ 0 region is in be highlighted.
5. intelligent range hood mobile human body detection method according to claim 3 or 4, which is characterized in that the step (2)
Specifically: gray value in statistics frame difference image D | dhi,jThe subregion of | > θ is sentenced as mobile human body target area, remaining region
It is set to non-moving human region；
Wherein, θ is threshold value, and θ is more than or equal to 25.
6. intelligent range hood mobile human body detection method according to claim 5, which is characterized in that θ is equal to 30.
7. a kind of intelligent range hood, it is characterised in that: it is provided with,
Visual imaging module carries out continuous imaging to target area, and the Video stream information that picture is imaged is sent to processing mould
Block；
Processing module receives the Video stream information for the imaging picture that visual imaging module is sent and is handled to obtain smog letter
Breath, by smog information conveyance to blast velocity control module；
Blast velocity control module carries out wind speed adjusting according to the smog information controlled wind speed adjuster that processing module is sent；
The processing module is using the movement in frame initial pictures after the method judgement as described in claim 1 to 5 any one
Human body target region.
8. intelligent range hood according to claim 7, it is characterised in that: visual imaging module is provided with camera, camera dress
With 180 ° of wide-angle lens, camera is built in the shell of smoke machine main body, and the output end of camera is electrically connected with processing module, 180 ° of wide-angles
A part of visual zone of camera lens covers hearth region, and a part of visual zone of 180 ° of wide-angle lens covers hearth upper outer
Human body working region.
9. intelligent range hood according to claim 8, it is characterised in that: the visual imaging module is additionally provided with light filling
Lamp, the visual field range of the irradiation area covering camera of light compensating lamp.
10. intelligent range hood according to claim 9, it is characterised in that: the light compensating lamp is infrared light compensating lamp.
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Cited By (1)
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