CN111818316A - Eye protection projection method and device and projector - Google Patents
Eye protection projection method and device and projector Download PDFInfo
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- CN111818316A CN111818316A CN202010722437.1A CN202010722437A CN111818316A CN 111818316 A CN111818316 A CN 111818316A CN 202010722437 A CN202010722437 A CN 202010722437A CN 111818316 A CN111818316 A CN 111818316A
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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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- 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
- G06V40/168—Feature extraction; Face representation
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19602—Image analysis to detect motion of the intruder, e.g. by frame subtraction
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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
Abstract
The present application relates to the field of projector technology; the eye protection projection method comprises the steps of setting a motion monitoring area, wherein the motion monitoring area is the same-direction area of a projection area of projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area, carrying out facial feature recognition on the moving object, and if facial features are recognized, turning off a light source of the projection equipment when the moving object enters the projection area; the person is tracked and identified in advance when not entering the projection area, the light source can be turned off in time when the person enters the projection area, the projection light source can be well prevented from directly irradiating the eyes of the person, the safety level of the projector is improved, and the protection function is realized.
Description
Technical Field
The invention relates to the field of projection, in particular to an eye protection projection method and device and a projector.
Background
The projector is a device capable of projecting images or videos onto a curtain, and generally comprises a projection imaging system and an optical amplification system, wherein projection signals are processed into image signals through the imaging technology of the projector, and the image signals can be projected and displayed on the curtain or a screen through the amplification of the optical system, the light source of the projector is mostly a high-intensity gas discharge light source, an LED light source or a novel light source represented by a laser light source, and the like, in the projection process, the light source has high illumination and high temperature, because people usually enter into the area of the image projected by the projector during the speech or lecture, at the moment, if people carelessly and directly view the light source of the projector through eyes, the eyes can be damaged to different degrees, certain potential safety hazards exist, the projector on the market does not have the protection function of actively protecting the eyes, the safety factor is low, so that the potential safety hazards become larger and larger along with the popularization of the projector, the utility model is inconvenient for people to use in daily life and has poor practicability.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide an eye protection projection method, apparatus and projector, and in particular to an eye protection projection method, apparatus and projector capable of realizing the protection of human eyes by detecting moving objects and recognizing human faces to turn on or off a projection light source.
The technical scheme adopted by the invention is as follows: a method of eye-shielding a projection, the method comprising: setting a motion monitoring area, wherein the motion monitoring area is the same-direction area of a projection area of the projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area; and carrying out facial feature recognition on the moving object, and if facial features are recognized, turning off a light source of the projection equipment when the moving object enters the projection area.
Preferably, the setting the motion monitoring area, so that the motion monitoring area is a same-direction area of a projection area of the projection device, includes: the motion monitor is arranged in a range limiting unit, and an opening of the range limiting unit is arranged in the same direction as a projection area of the projection equipment, so that the motion monitoring range of the motion monitor and the projection area of the projection area are in the same direction.
Preferably, after setting the opening of the range limiting unit to be in the same direction as the projection area of the projection apparatus, the method further includes: the height and the opening shape of the adjusting range limiting unit enable the motion monitoring area of the motion monitor to coincide with the early warning area and the projection area.
Preferably, before performing facial feature recognition on the moving object, the method further includes: and judging the size of the moving object, and when the volume of the moving object is smaller than a preset volume threshold value, not performing facial feature recognition.
Preferably, before performing facial feature recognition on the moving object, the method further includes: and judging the movement speed of the moving object, and when the movement speed of the moving object is greater than a preset speed threshold, not performing facial feature recognition.
Preferably, the facial feature recognition of the moving object includes: shooting an area of a moving object to acquire an image to be identified; and carrying out facial feature recognition on the image to be recognized.
Preferably, the facial feature recognition of the image to be recognized comprises judging whether the image to be recognized comprises one or more of a feature eye, a feature jaw, a feature lip, a feature eyebrow and a feature ear.
Preferably, the method further comprises, after turning off the light source of the projection apparatus: and judging that the moving object leaves the early warning area, and starting a light source of the projection equipment if the moving object leaves the early warning area.
In order to solve the above problems, the present invention further provides an eye protection projection apparatus, which includes a motion monitoring setting module, a motion monitoring module, a first determining module, a face recognition module, a second determining module and a control module, wherein the motion monitoring setting module is configured to set a motion monitoring area, so that the motion monitoring area is a same-direction area of a projection device; the motion monitoring module is used for monitoring a moving object in the motion monitoring area; the first judgment module is used for judging whether a moving object enters an early warning area, and the early warning area is a peripheral area which is away from the projection area by a preset distance; the face recognition module is used for the first judgment module to judge that a moving object enters the early warning area and carry out face feature recognition on the moving object; the second judging module judges whether the facial features are identified, and the control module is used for turning off the light source of the projection equipment when the moving object enters the projection area when the second judging module judges that the facial features are identified.
In order to solve the above problems, the present invention further provides a projector, including an optical machine having a light source, the optical machine emitting rays to form a projection area, and an eye protection projection device for setting a motion monitoring area, so that the motion monitoring area is a same-direction area of the projection device; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area; and carrying out facial feature recognition on the moving object, and if facial features are recognized, turning off a light source of the projection equipment when the moving object enters the projection area.
The beneficial effects of the invention are as follows: the invention aims at an eye protection projection method, wherein a motion monitoring area is arranged, and the motion monitoring area is the same-direction area of a projection area of projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area, carrying out facial feature recognition on the moving object, and if facial features are recognized, turning off a light source of the projection equipment when the moving object enters the projection area; the person is tracked and identified in advance when not entering the projection area, the light source can be turned off in time when the person enters the projection area, the projection light source can be well prevented from directly irradiating the eyes of the person, the safety level of the projector is improved, and the protection function is realized.
Drawings
Fig. 1 is a flowchart of an eye-protection projection method according to an embodiment of the invention; (ii) a
Fig. 2 is a schematic view of monitoring, early warning and projection areas related to an eye protection projection method in an embodiment of the invention;
fig. 3 is a schematic structural view of an eye-protecting projection apparatus according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a projector according to a third embodiment of the present invention;
fig. 5 is a first schematic structural diagram of a projector according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a projector according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a projector in the fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the words are used for distinguishing between them unless the context clearly dictates otherwise.
Example one
Fig. 1 is a flowchart of an eye-protection projection method according to an embodiment of the present invention, as shown in fig. 1, the method includes: the following detailed description of embodiments of the invention refers to the accompanying drawings:
step S100: setting a motion monitoring area, wherein the motion monitoring area is the same-direction area of a projection area of the projection equipment;
the motion monitoring area in the invention refers to a sensing area of the motion monitor, a specific motion monitor can be a motion sensor, a general motion monitor has a relatively comprehensive sensing area, that is, a sensing area which spreads around the motion monitor as a center, and compared with a projection device, the projection of the general motion monitor can be projected only in one direction, that is, in a certain direction to form a projection area, which is usually right in front of the projection device, so that the motion monitoring sensing is only needed to be performed on the area in the same direction as the projection area at this time, and the projection device can easily enter the projection area only in the area, and then the light of the projection device enters human eyes. This reduces the sensing area of the motion monitoring device and reduces unnecessary sensing. Such as a person moving behind the projection device, which is not able to enter the projection area anyway, without the possibility of eye damage, it is not necessary to monitor the movement of the area. Specifically, if a certain motion sensor is an omnidirectional sensor, if the motion sensor has a motion monitoring range adjusted by software, the motion monitoring range is set to be consistent with the direction of the projection area of the projection equipment, that is, only one side of the projection direction of the projection equipment is subjected to motion monitoring, so that even if a person moves behind the projection equipment, motion monitoring cannot be triggered, and invalid motion monitoring of the motion monitoring is reduced. At that time, if the mobile motion monitoring area cannot be adjusted by software, a range limiting unit may be provided, and the mobile sensor is placed at the bottom of the range limiting unit, the range limiting unit has an opening direction, so that the opening direction of the range limiting unit is the same as the projection area direction of the projection device, and the range limiting unit enables the mobile sensor to monitor the motion of the mobile object only in the opening direction range.
Step S200: monitoring a moving object in the motion monitoring area;
in this step, the specific motion monitoring device detects a moving object, which includes moving people, moving animals, moving objects and so on, in a motion monitoring area, that is, in the same direction as the projector. For example, a motion sensor is used as a motion monitoring device, and if an individual walks in front of the projection device, the motion sensor will monitor the motion, and similarly, only a cat running in front of the projection device, or a table tennis ball flying in front of the projection device, etc. will be sensed and monitored by the motion sensor. The specific monitoring can comprise the motion parameters of the motion speed, the motion direction, the motion area and the like.
Step S300: judging whether a moving object enters an early warning area, wherein the early warning area is a peripheral area which is away from the projection area by a preset distance;
in this step, as shown in fig. 2, 1 is a projection device, 2 is a projection area of the projection device, 3 is a motion monitoring area, and 4 is an early warning area. Specifically, the projection area may have a distance from the projection device to the display screen, or the like, according to a lens of the projection device. As can be seen from the figure, the motion monitoring region 3 is in the same direction as the projection region 2, and the area of the motion monitoring region 3 is much larger than that of the projection region 2, i.e. the motion monitoring region 3 includes the projection region 2. The area with a certain preset distance in the peripheral area of the projection area 2 is the early warning area 4, the specific preset distance can be 0.3 meter, 0.5 meter, 0.8 meter, 1 meter, 1.2 meter, 1.5 meter and the like, the early warning area can be set according to specific conditions, the limitation is not enough, it is understood that the early warning area is in the periphery of the projection area, and the moving object enters the early warning area to indicate that the moving object has a high possibility to enter the projection area. In the step, the moving object in the motion monitoring area is judged, whether the moving object enters the early warning area is judged, if the moving object enters the early warning area, the step S400 is performed, and if the moving object does not enter the early warning area, the moving object in the motion monitoring area is continuously monitored.
Step S400: performing facial feature recognition on the moving object;
in this step, it is mainly determined whether the moving object is a person, and it is mainly determined whether the moving object is facing the projection apparatus. The facial feature recognition of the moving object in the step has two functions, and whether the moving object faces the light emitting surface of the projection equipment, namely the light machine is judged while whether the moving object is a person is judged. Specifically, various mature face recognition technologies can be adopted, such as a series of related analysis technologies for acquiring images or videos containing human faces by using a camera or a video camera, automatically detecting image information, tracking the human faces, and performing face analysis on the detected human faces. Face detection refers to extracting a face image which is interested by people from a complex background. Face detection problems are further complicated by factors such as facial hair, cosmetics, lighting, noise, face tilt and size variations, and various occlusions. The face recognition technology mainly aims to search a specific face area on the whole input image so as to prepare for subsequent face recognition. Preferably, since the step does not specifically identify a person, but only needs to simply judge whether the person is a person or not and judge whether the face of the person is opposite to the projection device through the face of the person, the system can be intensively trained by using a statistical method through a face positive sample library and a face negative sample library which are formed by collecting a large number of images of the face and the non-face, so that the modes of the face and the non-face are detected and classified. Thus, a recognition and then discrimination can be rapidly carried out. Face detection by using color, contour, texture, structure, histogram feature, or the like may also be employed. Specifically, for example, it may be determined whether the image to be recognized includes one or more of a feature eye, a feature jaw, a feature lip, a feature eyebrow, and a feature ear, that is, it may be extracted by simple image acquisition, and then it may be determined whether the shape of the image to be recognized has features of a human face or partial features for quick determination. That is, in this step, if it is recognized that the moving object has facial features, the process proceeds to step S500, and if no facial features are recognized, it can be said that the moving object is not a person or is not a light emitting source facing the projection apparatus, and therefore, the eye of the person is not injured, so that it is negligible, and the light source of the projection apparatus is not turned off subsequently.
Step S600: if the facial features are identified, the light source of the projection device is turned off when the moving object enters the projection area.
In this step, since it is known in step S500 that the moving object is a person and the face of the moving object is facing the front of the projection device, the moving object enters the projection area, and the strong light of the projection device directly irradiates the eyes of the moving object to damage the eyes, so that the light source of the projection device is turned off when the moving object enters the projection area, thereby avoiding damage to the eyes of the moving object, and well protecting the user from damage to the eyes caused by the strong light entering the projection area inadvertently during use. Of course, in the above step S500, if it can be determined that the moving object is a person, but it does not recognize that the moving object has facial features, which indicates that the moving object does not face the projection device at that time, then the person may perform facial feature acquisition on the moving object in real time if the moving object enters the projection area, that is, when the moving object performs facial feature acquisition on the projection area in real time, once the facial features of the moving object are acquired, the light source of the projection device is immediately turned off, so that the situation that the person suddenly turns to the front face in the projection area and faces the projection device and strong light enters human eyes to damage the moving object is avoided.
By adopting the technical scheme, firstly, the motion monitoring area is greatly reduced, the monitoring of unnecessary motion objects is avoided, the processing amount of equipment is reduced, the processing efficiency is improved, meanwhile, the identification of the motion objects is completed in the early warning area by setting the early warning area, namely, whether the motion objects are human or not is accurately judged, whether the faces of the motion objects are right opposite to the projection equipment is judged, when a human enters the projection area, the operation of closing a light source of the projection equipment can be rapidly carried out, the processing time of closing the projection equipment is greatly reduced, instead of judging and closing the projection equipment after the human enters the projection area, certain damage to human eyes can be caused, the situation can be better avoided, and the human face identification can be carried out only when the motion objects enter the early warning area, instead of performing face feature recognition on all moving objects in the motion monitoring area, that is, a moving object which has a high possibility of entering the projection area can perform the face feature recognition processing, so that the processing amount in the whole process is reduced, some processes which do not need face recognition are reduced, and the processing process is optimized.
Further, in order to better reduce some unnecessary monitoring and optimize the processing procedure, in the process of step S100, after setting the opening of the range limiting unit to be in the same direction as the projection area of the projection device, the method further includes: the height and the opening shape of the range limiting unit are adjusted to enable the motion monitoring area of the motion monitor to be coincident with the early warning area and the projection area, namely the motion monitoring area just comprises the projection area and the early warning area, other areas do not need to be monitored, namely, a motion monitoring device can monitor the motion object only when the motion object enters the early warning area, for example, a person enters the early warning area, the motion sensor starts to monitor the motion object and starts facial feature recognition processing, and if the motion sensor does not enter the early warning area, the motion sensor cannot monitor the motion object, and therefore data processing amount of the motion sensor can be reduced. Specifically, if the motion monitor has a software setting function, the motion monitoring area parameters of the motion monitor can be adjusted through software, the projection area of the projection equipment is obtained, the early warning area of the projection equipment is obtained, the sensing area of the motion monitor is set through the relevant information of the sensing area and the early warning area, and if the motion monitor has the motion monitoring area, the motion sensor sets the motion monitoring area of the motion monitor. If the motion monitor has no software adjusting function, the motion monitoring area of the motion monitor can be coincided with the early warning area and the projection area by setting the height and the opening shape of the adjusting and limiting device. For example, if the motion monitor is a motion sensor, the limiting device is a cylindrical object, the motion sensor is placed at the bottom of a cylinder, the opening of the cylinder is arranged in the same direction as the opening of the projection device, and the sensing area of the motion sensor is controlled by adjusting the positions of the cylinder and the light engine of the projector, the height of the cylinder and the shape of the opening of the cylinder, so that the sensing area of the motion sensor just coincides with the early warning area and the projection area.
Further, in order to reduce unnecessary facial feature recognition processing, the method further includes, before performing facial feature recognition on the moving object: and judging the size of the moving object, and when the volume of the moving object is smaller than a preset volume threshold value, not performing facial feature recognition. The volume threshold value can be set according to an empirical value, or can be set by self-defining according to the needs of a user, and it should be understood that because a human body has a certain volume, before facial feature recognition is performed on a moving object, whether the human body is a person or not can be judged, if not, facial feature recognition is not necessary, and under normal conditions, the relative ratio of the volume area of the human body is larger, for example, the human body is larger than the volume area of a table tennis ball and is larger than a kitten or a puppy, when the volume of the moving object is smaller than the preset threshold value, facial feature recognition can be not considered, and because the human body can be judged not to be a person, human eye damage can also be caused.
Further, before performing facial feature recognition on the moving object, the method further comprises: and judging the movement speed of the moving object, and when the movement speed of the moving object is greater than a preset speed threshold, not performing facial feature recognition. Since the area of the projection device is relatively limited, if the moving object rapidly passes through the area, the bright light of the projection device is not as strong as to enter the human eyes, and the human has already passed through the projection area, and if the speed of the moving object is too fast, it can also be determined that the moving object may be only a rapidly flying ping-pong ball, or a rapidly running kitten, etc., so that before the moving object performs facial feature recognition, the method further comprises: and judging whether the movement speed of the moving object is greater than a preset speed threshold, wherein the speed threshold can be set according to an empirical value or according to the requirements of a user, and when the speed threshold is greater than the speed threshold, the person can quickly pass through the projection area, strong light can pass through the projection area before entering the eyes, the eyes cannot be affected, and then subsequent facial feature recognition processing and light source closing processing of the projection equipment are not needed. Of course, exceeding the speed threshold may also be understood as the passing of an animal or other object through the projection area, again without the necessity of subsequent facial feature recognition processing and the turning off of the light source of the projection device. Thus improving the intelligence of the treatment and reducing unnecessary treatments.
Further, since the image capturing device captures all images of the front portion of the projection device, it may capture images of pictures projected on a wall, and if the content played at this time relates to a person, particularly a human face, it may be determined by mistake, and in order to avoid this, the image capturing device may be configured to perform facial feature recognition on the moving object, including: shooting an area of a moving object to acquire an image to be identified; and carrying out facial feature recognition on the image to be recognized. That is to say, only the moving object is subjected to image acquisition, so that the person projected by the projection equipment can be avoided, and the judgment accuracy is improved.
Further, in order to quickly judge whether the moving object is a person and whether the moving object is facing the projection device, the facial feature recognition of the image to be recognized comprises the step of judging whether the image to be recognized comprises one or more of a feature eye, a feature jaw and a feature lip, a feature eyebrow and a feature ear. That is to say, can simply just can carry out the discernment fast through some people's facial features, need not carry out the discernment of whole facial features, only can discern one of them and just can carry out the judgement fast, improve the treatment effeciency, avoid not having handled the moving object and having entered into the projection area, cause the damage to the moving object yet.
Further, if it can be determined that the projection device does not cause damage to the moving object, the projection device may be caused to start the light source again to operate. Specifically, the method further includes, after turning off a light source of the projection apparatus: and judging that the moving object leaves the early warning area, and starting a light source of the projection equipment if the moving object leaves the early warning area.
Example two
In order to solve the above problem, the present invention further provides an eye protection projection apparatus 101, as shown in fig. 3, including a motion monitoring setting module 1011, a motion monitoring module 1012, a first determining module 1013, a face recognition module 1014, a second determining module 1015 and a control module 1016, where the motion monitoring setting module 1011 is configured to set a motion monitoring area, so that the motion monitoring area is a same-direction area of a projection device; the motion monitoring module 1012 is configured to monitor a moving object in the motion monitoring area; the first judging module 1013 is configured to judge whether a moving object enters an early warning area, where the early warning area is a peripheral area having a preset distance from the projection area; the facial recognition module 1014 is configured to, when the first determining module 1013 determines that a moving object enters the early warning area, perform facial feature recognition on the moving object; the second determining module 1015 is configured to determine whether a facial feature is identified, and the control module 1016 is configured to turn off the light source of the projection apparatus when the moving object enters the projection area when the second determining module 1015 determines that the facial feature is identified.
EXAMPLE III
The invention also provides a projector 1, as shown in fig. 4, including an optical machine with a light source 1017, where the optical machine emits rays to form a projection area, and an eye protection projection device 101 for setting a motion monitoring area, so that the motion monitoring area is the same direction area of the projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area; and carrying out facial feature recognition on the moving object, and if facial features are recognized, turning off a light source of the projection equipment when the moving object enters the projection area. It is noted that the projector herein is an example of a projection device.
Example four
For better explaining the projector of the present application, as shown in fig. 5, the projector 4 provided in the present application and the eye-protecting projection device 401 provided in the projector 4 are provided, where the eye-protecting projection device 401 includes a motion monitoring setting module 4011, a motion monitoring module 4012, a first judging module 4013, a facial recognition module 4014, a second judging module 4015 and a control module 4016, and as can be seen from the figure, the modules are electrically connected through signal transmission, and the motion monitoring setting module 4011 is configured to set a monitoring area of the motion monitoring module 4012, so that the motion monitoring area is a same-direction area of a projection area of the projection device; the motion monitoring module 4012 monitors a moving object in a monitoring area, when the moving object enters the monitoring area, the motion monitoring module 4012 monitors the moving object, the motion condition of the moving object is sent to the first judging module 4013, the first judging module 4013 judges whether the moving object enters an early warning area, the early warning area is a peripheral area which is far away from the projection area and has a preset distance, when the first judging module 4013 judges that the moving object enters the early warning area, a signal is sent to the facial recognition module 4014, the facial recognition module 4014 recognizes facial features of the moving object, the condition of the facial feature recognition is fed back to the second judging module 4015, the second judging module 4015 judges whether the facial features are recognized, if the facial features are recognized, the second judging module 4015 sends a signal to the control module 4016, and the control module 4016 turns off a light source 1017 of the projector 4 when the moving object enters the projection area Of course, the motion monitor module 4012 can be used to determine whether the projection area is entered. Specifically, in this embodiment, the motion monitoring setting module 4011 may set the motion monitoring area by software, or may set the monitoring range of the omnidirectional motion monitor in a limited manner, that is, the setting of the monitoring area is completed by a hardware structure. Specifically, the omnidirectional motion monitor may be disposed at a bottom of a range limiting unit, the range limiting unit has an opening direction, the opening direction of the range limiting unit is the same as the projection area direction of the projection apparatus, and the range limiting unit enables the motion sensor to monitor motion of only a moving object in the opening direction range.
Furthermore, in order to better reduce unnecessary monitoring of moving objects, the shape and height of the opening of the range limiting unit can be set, so that the sensing area of the motion sensor is just overlapped with the early warning area and the projection area, namely the overlapping area of the monitoring area of the motion sensor and the early warning area and the projection area is equal in size, namely, the motion sensor only monitors the moving objects in the early warning area and the projection area during working, other areas cannot monitor, the monitoring area of the motion sensor is reduced, the data processing amount of the motion sensor is reduced, and the monitoring accuracy is improved.
In order to facilitate image acquisition for facial feature recognition, it is preferable that the facial image acquisition device is disposed right in front of the projector, near the lens attachment of the projector. The image acquisition device here may be a camera.
In an embodiment of the present application, as shown in fig. 6, the projector 4 further includes a volume measurement module 4018, and in order to reduce unnecessary facial feature recognition processing, the volume measurement module 4018 is configured to determine the size of the moving object before the facial feature recognition module 4014 performs facial feature recognition on the moving object, and when the size of the moving object is smaller than a preset volume threshold, the facial feature recognition is not performed. The volume threshold value can be set according to an empirical value, or can be set by self-defining according to the needs of a user, and it should be understood that because a human body has a certain volume, before facial feature recognition is performed on a moving object, whether the human body is a person or not can be judged, if not, facial feature recognition is not necessary, and under normal conditions, the relative ratio of the volume area of the human body is larger, for example, the human body is larger than the volume area of a table tennis ball and is larger than a kitten or a puppy, when the volume of the moving object is smaller than the preset threshold value, facial feature recognition can be not considered, and because the human body can be judged not to be a person, human eye damage can also be caused.
In an embodiment of the present application, as shown in fig. 7, the projector 4 further includes a speed measuring module 4019, where the speed measuring module 4019 is configured to determine a moving speed of the moving object before the facial recognition module 4014 performs facial feature recognition on the moving object, and when the moving speed of the moving object is greater than a preset speed threshold, the facial feature recognition is not performed. Since the area of the projection device is relatively limited, if the moving object rapidly passes through the area, the bright light of the projection device is not as strong as to enter the human eyes, and the human has already passed through the projection area, and if the speed of the moving object is too fast, it can also be determined that the moving object may be only a rapidly flying ping-pong ball, or a rapidly running kitten, etc., so that before the moving object performs facial feature recognition, the method further comprises: and judging whether the movement speed of the moving object is greater than a preset speed threshold, wherein the speed threshold can be set according to an empirical value or according to the requirements of a user, and when the speed threshold is greater than the speed threshold, the person can quickly pass through the projection area, strong light can pass through the projection area before entering the eyes, the eyes cannot be affected, and then subsequent facial feature recognition processing and light source closing processing of the projection equipment are not needed. Of course, exceeding the speed threshold may also be understood as the passing of an animal or other object through the projection area, again without the necessity of subsequent facial feature recognition processing and the turning off of the light source of the projection device.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
The eye protection projection method and the related device provided by the embodiment of the invention are described in detail, and the description of the embodiment is only used for helping to understand the method and the idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, and those skilled in the art may make modifications and variations within the spirit of the present invention, and all modifications, equivalents and modifications of the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.
Claims (10)
1. A method of eye-shielding projection, the method comprising: setting a motion monitoring area, wherein the motion monitoring area is the same-direction area of a projection area of the projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area, carrying out facial feature recognition on the moving object; and judging whether the moving object identifies facial features, if so, turning off a light source of the projection equipment when the moving object enters the projection area.
2. The eye-shielding projection method of claim 1, wherein said positioning a motion-monitoring zone such that the motion-monitoring zone is a co-directional zone of a projection device comprises: the motion monitor is arranged in a range limiting unit, and an opening of the range limiting unit is arranged in the same direction as a projection area of the projection equipment, so that the motion monitoring range of the motion monitor and the projection area of the projection area are in the same direction.
3. The eye-shielding projection method of claim 2, further comprising, after setting the opening of the range-limiting unit to be in the same direction as the projection area of the projection device: the height and the opening shape of the adjusting range limiting unit enable the motion monitoring area of the motion monitor to coincide with the early warning area and the projection area.
4. The eye-shielding projection method of claim 1, further comprising, prior to performing facial feature recognition on the moving object: and judging the size of the moving object, and when the volume of the moving object is smaller than a preset volume threshold value, not performing facial feature recognition.
5. The eye-shielding projection method of claim 1, further comprising, prior to performing facial feature recognition on the moving object: and judging the movement speed of the moving object, and when the movement speed of the moving object is greater than a preset speed threshold, not performing facial feature recognition.
6. The eye-shielding projection method of any one of claims 1-5, wherein performing facial feature recognition on the moving object comprises: shooting an area of a moving object to acquire an image to be identified; and carrying out facial feature recognition on the image to be recognized.
7. The eye-protection projection method of claim 6, wherein the facial feature recognition of the image to be recognized comprises determining whether the image to be recognized includes one or more of a feature eye, a feature jaw and a feature lip, a feature eyebrow, and a feature ear.
8. The eye-shielding projection method of claim 1, further comprising, after turning off a light source of the projection device: and judging that the moving object leaves the early warning area, and starting a light source of the projection equipment if the moving object leaves the early warning area.
9. An eye protection projection device is characterized by comprising a motion monitoring setting module, a motion monitoring module, a first judging module, a face recognition module, a second judging module and a control module,
the motion monitoring setting module is used for setting a motion monitoring area, so that the motion monitoring area is the same-direction area of a projection area of the projection equipment;
the motion monitoring module is used for monitoring a moving object in the motion monitoring area;
the first judgment module is used for judging whether a moving object enters an early warning area, and the early warning area is a peripheral area which is away from the projection area by a preset distance;
the face recognition module is used for the first judgment module to judge that a moving object enters the early warning area and carry out face feature recognition on the moving object;
the second judging module is used for judging whether the moving object identifies facial features;
the control module is used for the second judging module to judge and identify the facial features, and the light source of the projection equipment is turned off when the moving object enters the projection area.
10. A projector, comprising an optical engine having a light source, the optical engine emitting radiation to form a projection area, wherein: the eye protection projection device is used for setting a motion monitoring area, so that the motion monitoring area is the same-direction area of a projection area of the projection equipment; monitoring the moving object in the motion monitoring area, and judging whether the moving object enters an early warning area, wherein the early warning area is a peripheral area which is a preset distance away from the projection area; if a moving object enters the early warning area; and carrying out facial feature recognition on the moving object, judging whether the moving object recognizes facial features, if so, turning off the light source of the projection equipment when the moving object enters the projection area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722437.1A CN111818316A (en) | 2020-07-24 | 2020-07-24 | Eye protection projection method and device and projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722437.1A CN111818316A (en) | 2020-07-24 | 2020-07-24 | Eye protection projection method and device and projector |
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| CN111818316A true CN111818316A (en) | 2020-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126956A1 (en) * | 2020-12-15 | 2022-06-23 | 青岛海信激光显示股份有限公司 | Laser projection device and prompt method therefor |
| WO2023236714A1 (en) * | 2022-06-10 | 2023-12-14 | 上海丹诺西诚智能科技有限公司 | Anti-dazzle method and system for in-vehicle projection lamp |
-
2020
- 2020-07-24 CN CN202010722437.1A patent/CN111818316A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126956A1 (en) * | 2020-12-15 | 2022-06-23 | 青岛海信激光显示股份有限公司 | Laser projection device and prompt method therefor |
| WO2023236714A1 (en) * | 2022-06-10 | 2023-12-14 | 上海丹诺西诚智能科技有限公司 | Anti-dazzle method and system for in-vehicle projection lamp |
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