CN108375095A - Range hood control method and range hood - Google Patents
Range hood control method and range hood Download PDFInfo
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- CN108375095A CN108375095A CN201810053737.8A CN201810053737A CN108375095A CN 108375095 A CN108375095 A CN 108375095A CN 201810053737 A CN201810053737 A CN 201810053737A CN 108375095 A CN108375095 A CN 108375095A
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
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Abstract
The invention relates to the technical field of range hoods and discloses a control method of a range hood, which comprises the steps of obtaining a face image, extracting image characteristics in the face image for face detection, comparing the image characteristics with the characteristics of a preset face template, and judging whether to awaken the range hood according to a comparison result. The control method of the range hood provided by the invention has the advantages that the face detection is carried out by extracting the image characteristics in the face image, the image characteristics are compared with the characteristics of the preset face template, and whether the range hood is awakened or not is judged according to the comparison result. The control method can not trigger the range hood by mistake due to the approach of a user or other subjective activities, improves the reliability of the range hood, and reduces the probability of false triggering. The invention also discloses a range hood, which is controlled by adopting the control method of the range hood, so that the probability of mistakenly triggering the range hood by a user can be effectively reduced, and the user experience effect is better.
Description
Technical field
The present invention relates to range hood technical field more particularly to the control methods and range hood of a kind of range hood.
Background technology
With the development of science and technology, the technology of some hommizations is applied on household electrical appliance, these science and technology add
Enter to make household electrical appliance to increase a few minutes technology sense on the basis of meeting traditional function, make household electrical appliance more hommization, improves
People’s lives quality.Human body proximity sensor is also known as contactless proximity sensor, is ideal electronic switch quantity sensor,
Incude physical activity information using infrared ray, microwave principle.
In order to improve the hommization effect of range hood, human body sensor is applied to the control system of range hood
On, range hood is automatically waken up when people is close to range hood, coordinates voice module or gesture module etc. intelligentized with this
Module uses.But since human body sensor utilizes infrared ray, microwave principle induction physical activity so that fume-exhausting
The reliability of machine is low, be easy to cause false triggering, reduces the experience effect of user.
Invention content
It is an object of the invention to propose a kind of control method and range hood of range hood, solves existing fume-exhausting
Machine incudes physical activity using infrared ray, microwave principle, caused by the problem of reliability is low and easy false triggering.
For this purpose, the present invention uses following technical scheme：
A kind of control method of range hood obtains facial image, and the characteristics of image extracted in the facial image carries out
Face datection compares described image feature and the feature of default face template, judges whether to wake up according to comparing result
Range hood.
The control method of the range hood, by extracting the characteristics of image in facial image, by described image feature and in advance
If the feature of face template is compared, judged whether to wake up range hood according to comparing result.The control method will not be because of
User close or other subjective activities and false triggering range hood, improve the reliability of range hood, reduce false triggering
Probability.
A kind of preferred embodiment of control method as above-mentioned range hood before the acquisition facial image, passes through people
Body-sensing should judge to whether there is human body in the preset range of range hood；
If so, obtaining facial image；
If it is not, not obtaining facial image then, smoke exhaust ventilator is not waken up.
By before obtaining facial image and carrying out Face datection, carrying out the preset range that human body sensing judges range hood
Inside whether with the presence of human body, if human body is not present, without carrying out Face datection, computational complexity is reduced；And pass through people
Body-sensing should judge the presence of human body, can prevent using dummies' face such as photo, realize the wake-up of range hood, further drop
The probability of low range hood false triggering.
A kind of preferred embodiment of control method as above-mentioned range hood carries out human body sense while the Face datection
It answers, if human body sensing judges that there are faces with the presence of human body and Face datection in the preset range of range hood, wake up suction
Kitchen ventilator.By the double check of human body sensing and Face datection, human body sensing and Face datection are carried out at the same time, there are two types of
When detection is satisfied by condition, range hood could be waken up, reduces the probability of range hood false triggering.
A kind of preferred embodiment of control method as above-mentioned range hood, by described image feature and default face template
Feature carry out comparison include：
The feature of described image feature and common default face template is compared, judge described image feature with it is described
Whether the feature of common default face template matches；
If so, there are face, range hood is waken up；
If it is not, then described image feature and the feature of non-common default face template are compared.By the way that image is special
The common feature for presetting face template of seeking peace is compared, and the complexity of Face datection operation is reduced.
A kind of preferred embodiment of control method as above-mentioned range hood, by described image feature and default face template
Feature carry out comparison be：The corresponding detection characteristic value of described image feature is corresponding with the feature of default face template several
A default characteristic value is compared, and judges the detection characteristic value and any default spy in several described default characteristic values
Whether value indicative is equal；
If so, the characteristics of image of extraction is face characteristic；
If it is not, the characteristics of image then extracted is non-face feature.
A kind of preferred embodiment of control method as above-mentioned range hood, by the corresponding detection feature of the face characteristic
Value is compared with the default characteristic value, judges whether the corresponding detection characteristic value of the face characteristic includes all described
Default characteristic value；
If so, there are face, range hood is waken up；
If it is not, face is then not present, range hood is not waken up.
The described image feature of a kind of preferred embodiment of control method as above-mentioned range hood, extraction includes at least
Haar features.Opposite relationship between light and dark between Haar characteristic reactions regional area can be that face and non-face differentiation carry
For effective information.
A kind of preferred embodiment of control method as above-mentioned range hood, to the face after obtaining facial image
Image is pre-processed.The main purpose of image preprocessing is to eliminate information unrelated in image, filters out interference, noise, is restored
Useful real information enhances detectability for information about and simplifies data to the maximum extent, to improve feature extraction, figure
As the reliability of segmentation, matching and identification.
A kind of range hood is controlled using the control method of above-mentioned range hood.The smoke exhaust ventilator can be reduced effectively
The probability of the false triggering range hood of user, user experience are better.
As a kind of preferred embodiment of above-mentioned range hood, the range hood includes：
Image collecting device, for acquiring facial image；
Face identification device is electrically connected with described image harvester, and the image for extracting the facial image is special
Sign carries out Face datection, and described image feature and the feature of default face template are compared；And
Control device is electrically connected with face identification device and image collecting device, for according to the recognition of face
The comparing result of device wakes up range hood.
Beneficial effects of the present invention：
The control method of range hood proposed by the present invention carries out face inspection by the characteristics of image extracted in facial image
It surveys, described image feature and the feature of default face template is compared, judged whether to wake up fume-exhausting according to comparing result
Machine.The control method will not because of the close of user or other it is subjective activity and false triggering range hood, reduce false triggering
Probability.
Range hood proposed by the present invention is controlled using the control method of above-mentioned range hood, can effectively reduce use
The probability of the false triggering range hood at family, user experience are better.
Description of the drawings
Fig. 1 is the flow chart of the control method for the range hood that the embodiment of the present invention one provides；
Fig. 2 is the flow chart of the control method of range hood provided by Embodiment 2 of the present invention.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one：
Present embodiment provides a kind of control method of range hood, as shown in Figure 1, including the following steps:
S10, facial image is obtained.
Facial image is obtained by the image collecting device being arranged on range hood, image collecting device can be photograph
Machine, or the facial image of camera, acquisition is static map or Dynamic Graph.Preferably, it in the present embodiment, is set on kitchen ventilator
The image collector set is set to camera.Different facial images can be transferred through camera and collect, such as still image, dynamic
State image, different positions, different expressions etc. can be acquired well.When user is in the shooting model of collecting device
When enclosing interior, collecting device can automatically snap the facial image of user.
Characteristics of image in S20, the extraction facial image carries out Face datection.
Extracting the progress Face datection of the characteristics of image in the facial image includes：Select some on the facial image
The characteristics of image in the selected watch window is extracted as watch window in region.In the present embodiment, the image of extraction is special
Sign is Haar features, and the opposite relationship between light and dark between Haar characteristic reactions regional area, can be face and non-face area
Divide and effective information is provided.Watch window is moved in facial image according to certain way, and the extraction of characteristics of image is carried out, until
Entire facial image realizes the extraction of all images feature by watch window.In the present embodiment, extraction is characterized as Haar spies
Sign.
Specifically, Haar features are to take the fritter of a rectangle as watch window in some position of facial image, so
Watch window is divided into black and white two parts afterwards, and the pixel covered respectively to two parts is (each of on image
Point be known as a pixel) gray value summation, finally with white portion pixel gray value and subtract black portions pixel
The sum of gray value obtains the corresponding detection characteristic value of a Haar feature.By the corresponding detection characteristic value of the Haar features of extraction
Default characteristic value corresponding with the feature in facial image template is compared.Haar features reflect the phase between regional area
To relationship between light and dark, effective information can be provided for face and non-face differentiation, for example, skin region of the eye areas than surrounding
Domain is dark, this feature can be showed by Haar features.
S30, described image feature and the feature of default face template are compared.
Characteristics of image and default face template feature are compared, including by the corresponding detection feature of described image feature
Value several default characteristic values corresponding with the feature of default face template are compared, by the Haar of extraction spies in the present embodiment
Corresponding detection characteristic value several default characteristic values corresponding with the Haar features of default face template are levied to be compared.
S40, judge whether characteristics of image matches with the feature of default face template according to comparing result.
Specifically, whether judging any default characteristic value detected in characteristic value and several described default characteristic values
It is equal；
If so, the characteristics of image of extraction is face characteristic；
If it is not, the characteristics of image then extracted is non-face feature.
It detects characteristic value and default characteristic value is equal, it is believed that：It detects characteristic value and default characteristic value exists centainly
Difference, if the difference of detection characteristic value and default characteristic value is within a preset range, then it is assumed that detection characteristic value and default characteristic value
It is equal, if the difference for otherwise detecting characteristic value and default characteristic value exceeds preset range, then it is assumed that detection characteristic value and default spy
Value indicative is unequal.
The corresponding detection characteristic value of the face characteristic is compared with the default characteristic value, judges that the face is special
Levy whether corresponding detection characteristic value includes all default characteristic values；
If so, there are face, range hood is waken up；
If it is not, face is then not present, range hood is not waken up.
Specifically, the Haar features in facial image template include boundary characteristic, linear character and centered around feature, three
Category feature can effectively describe the feature in facial image.Boundary characteristic include 4 kinds, linear character include 8 in, centered around
Feature includes 2 kinds, and each feature corresponds to a default characteristic value, that is, includes 12 default characteristic values.When the face detected
When the corresponding detection characteristic value of feature includes above-mentioned 12 default characteristic values, then judge, there are face, to wake up range hood；Work as inspection
The corresponding detection characteristic value of face characteristic measured only includes a portion of above-mentioned 12 default characteristic values, then judges not deposit
In face, range hood will not wake up.The control method will not the false triggering suction because of the close of user or other subjective activities
Kitchen ventilator reduces the probability of false triggering.
Present embodiment provides a kind of range hood, is controlled using the control method of above-mentioned range hood.The smoke pumping
Machine can effectively reduce the probability of the false triggering range hood of user, and user experience is better.
Specifically, range hood includes：Image collecting device, face identification device and control device, image collector
It sets, for acquiring facial image；Face identification device is electrically connected with image collecting device, the figure for extracting the facial image
As feature progress Face datection, described image feature and the feature of default face template are compared, and comparing result is passed
It is defeated by the control device being electrically connected with the face identification device, control device controls the wake-up of range hood.In the present embodiment,
Image collector is set to camera.
When human body close to range hood and look on the bright side of things open range hood when, it is only necessary to raise the head, eyes are adopted towards front, image
Acquisition means acquire facial image, and face identification device can obtain facial image automatically, and wake up range hood；When human body is close to suction
Kitchen ventilator rather than when in range hood to be opened, will not because of the close of human body and false triggering range hood, reliability are high, accidentally
The probability of triggering is small.
Embodiment two：
As shown in Fig. 2, present embodiment provides a kind of control method of range hood, following steps are specifically included:
S10, judge to whether there is human body in the preset range of range hood by human body sensing.
If so, obtaining facial image；
If it is not, not obtaining facial image then, smoke exhaust ventilator is not waken up.
Human body sensing can be infrared induction or microwave induced, be incuded using human body infrared in the present embodiment.Infrared induction
Judge to whether there is human body in the preset range of range hood, is the specific wavelength using infrared sensor detection human body release
Whether infrared ray induces in turn has existing for human body in the preset range of range hood.When infrared sensor detects fume-exhausting
There are facial image when human body, is then obtained in preset range in the preset range of machine, Face datection is carried out；If infrared sensor
Human body is not detected within a preset range, then does not obtain facial image, does not wake up range hood, reduce computational complexity；And
And the presence of human body is judged by human body sensing, it can prevent from only occurring, using dummies' faces such as photos, realizing by Face datection
The wake-up of range hood further decreases the probability of range hood false triggering.
Human body sensing is carried out while the Face datection, if human body sensing judges someone in the preset range of range hood
Body exist and Face datection there are faces, then wake up range hood.By the double check of human body sensing and Face datection,
Human body sensing and Face datection are carried out at the same time, and when being only satisfied by condition there are two types of detection, could be waken up range hood, be reduced oil suction
The probability of smoke machine false triggering.
S20, facial image is obtained.
The mode and embodiment one of the present embodiment acquisition facial image are identical, and details are not described herein.
S30, the facial image is pre-processed after obtaining facial image.
Facial image pre-processes：
A. image filtering denoising, size compression normalization；
B. the coloured image of input is converted into gray level image；
C. gray scale image histogram equalization, it is therefore an objective to enhance contrast, improve picture quality.Image preprocessing it is main
Purpose is to eliminate unrelated information in image, filters out interference, noise, restores useful real information, enhance for information about can
Detection property and to the maximum extent simplified data, to improve feature extraction, image segmentation, matching and the reliability of identification.
Characteristics of image in S40, the extraction facial image carries out Face datection.
The described image feature of extraction includes Haar features, further includes histogram feature, color characteristic, template characteristic and knot
Structure feature it is one or more, by manifold extraction, improve the accuracy of detection, reduce the false triggering of range hood
Probability.
S50, described image feature and the feature of common default face template are compared.
Range hood extracts the face figure by that will commonly use default face template storage to common default face template library
Feature of the characteristics of image first with common default face template as in is compared.
S60, judge whether described image feature and the feature of the common default face template match.
If so, there are face, range hood is waken up；
If it is not, then described image feature and the feature of non-common default face template are compared.
If described image feature and the feature of the common default face template match, judge, there are face, to wake up
Range hood reduces the operation complexity of Face datection；If the spy of described image feature and the common default face template
Sign mismatches, then compares described image feature and the feature of non-common default face template.
S70, judge whether described image feature and the feature of the non-common default face template match.
If so, there are face, range hood is waken up；
If it is not, face is then not present, range hood is not waken up.
Comparison and characteristics of image of the present embodiment characteristics of image with common default face template and use very much face template
Comparison operation mode and characteristics of image in embodiment one it is identical as the operation mode of the comparison of default face template, herein not
It repeats again.
Present embodiment provides a kind of range hood, is controlled using the control method of above-mentioned range hood.The smoke pumping
Machine can effectively reduce the probability of the false triggering range hood of user, and user experience is better.
Specifically, range hood includes：Infrared sensor, image collecting device, face identification device and control device,
Infrared sensor is arranged on range hood, whether there is human body in the preset range for detecting range hood；Image Acquisition
Device for acquiring facial image in real time；Face identification device is electrically connected with image collecting device, for carrying out Face datection simultaneously
The characteristics of image for extracting the facial image compares described image feature and the feature of default face template, and will be right
It is transferred to the control device being electrically connected with the face identification device than result, control device controls the wake-up of range hood.
When human body close to range hood and look on the bright side of things open range hood when, it is only necessary to raise the head, eyes are towards front, fume-exhausting
Infrared sensor on machine will detect that human body, and then image acquisition device facial image, face identification device can be certainly
It is dynamic to obtain facial image, and wake up range hood；It, will not when human body is close to range hood rather than in range hood to be opened
Because human body close and false triggering range hood, reliability are high, the probability of false triggering is small.
Note that above are only presently preferred embodiments of the present invention.It will be appreciated by those skilled in the art that the present invention is not limited to here
The specific embodiment, can carry out for a person skilled in the art it is various it is apparent variation, readjust and substitute and
Without departing from the scope of protection of the present invention.Therefore, although being described in further detail to the present invention by above example,
But the present invention is not limited only to above example, without departing from the inventive concept, can also include it is more other
Equivalent embodiment, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of control method of range hood, which is characterized in that obtain facial image, extract the image in the facial image
Feature carries out Face datection, and described image feature and the feature of default face template are compared, judged according to comparing result
Whether range hood is waken up.
2. the control method of range hood according to claim 1, which is characterized in that before the acquisition facial image,
Judge to whether there is human body in the preset range of range hood by human body sensing；
If so, obtaining facial image；
If it is not, not obtaining facial image then, smoke exhaust ventilator is not waken up.
3. the control method of range hood according to claim 1, which is characterized in that carried out while the Face datection
Human body sensing, if human body sensing judges in the preset range of range hood with the presence of human body and Face datection there are face,
Wake up range hood.
4. the control method of range hood according to claim 1, which is characterized in that by described image feature and default people
The feature of face template carries out comparison：
The feature of described image feature and common default face template is compared, judges that described image feature is commonly used with described
Whether the feature of default face template matches；
If so, there are face, range hood is waken up；
If it is not, then described image feature and the feature of non-common default face template are compared.
5. the control method of range hood according to claim 1, which is characterized in that by described image feature and default people
The feature of face template carries out comparison：The corresponding detection characteristic value of described image feature is corresponding with the feature of default face template
Several default characteristic values compared, and judge the detection characteristic value and any in default characteristic value described in several
Whether default characteristic value is equal；
If so, the characteristics of image of extraction is face characteristic；
If it is not, the characteristics of image then extracted is non-face feature.
6. the control method of range hood according to claim 5, which is characterized in that by the corresponding inspection of the face characteristic
It surveys characteristic value to be compared with the default characteristic value, judges whether the corresponding detection characteristic value of the face characteristic includes all
The default characteristic value；
If so, there are face, range hood is waken up；
If it is not, face is then not present, range hood is not waken up.
7. the control method of range hood according to claim 1, which is characterized in that the described image feature of extraction is at least
Including Haar features.
8. the control method of range hood according to claim 1, which is characterized in that institute after obtaining facial image
Facial image is stated to be pre-processed.
9. a kind of range hood, which is characterized in that using the control method control of range hood according to any one of claims 1-8
System.
10. the control method of range hood according to claim 9, which is characterized in that the range hood includes：
Image collecting device, for acquiring facial image；
Face identification device is electrically connected with described image harvester, for extract the characteristics of image of the facial image into
Row Face datection compares described image feature and the feature of default face template；And control device, with recognition of face
Device and image collecting device electrical connection, for waking up range hood according to the comparing result of the face identification device.
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