CN112825491B - Method and system for enabling detection of light emitting devices - Google Patents
Method and system for enabling detection of light emitting devices Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
A method and system for enabling detection of a light emitting device, the light emitting device comprising one or more light sources and a controller, the controller being capable of setting a lighting pattern of the light sources, the method comprising: detecting a characteristic of ambient light surrounding the light emitting device using an ambient light sensing device; the controller of the light-emitting device sets the light-emitting mode of the light source of the light-emitting device according to the characteristics of the environment light so that the light source can present different characteristics from the environment light; the identification device collects an image containing the light-emitting device by using an image collecting device and analyzes the image to obtain the optical characteristics of the environment in which the light-emitting device is positioned; the recognition apparatus processes the image according to the optical characteristics of the environment and/or configures an image acquisition device to reacquire an image containing the light emitting device according to the optical characteristics of the environment; and the recognition device analyzes the image to detect the light emitting means.
Description
Technical Field
The present invention relates to the field of visual inspection, and in particular, to a method and system for implementing inspection of a light emitting device.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the development and progress of science and technology, the optical communication technology is more and more widely applied. In some optical communication schemes, a light emitting device may be used to communicate information to the outside, and an identification apparatus having an image capture device (e.g., a camera) may be used to capture an image containing the light emitting device to identify the information communicated to the outside by the light emitting device.
A light emitting device for optical communication purposes may generally include a controller that may drive light sources through different driving modes to communicate different information to the outside, and at least one light source. Fig. 1 shows an exemplary light emitting device 100 comprising three light sources (a first light source 101, a second light source 102, a third light source 103, respectively) for communicating information. The lighting arrangement 100 further comprises a controller (not shown in fig. 1) for selecting a respective driving mode for each light source in dependence of the information to be communicated. For example, in different driving modes, the controller may control the light emitting manner of the light source using different driving signals, so that when the light emitting apparatus 100 is photographed using the device having an imaging function, the image of the light source therein may present different appearances (e.g., different colors, patterns, brightness, etc.). By analyzing the images of the light sources in the light emitting device 100, the driving pattern of each light source at the moment can be analyzed, and thus the information transmitted by the light emitting device 100 at this moment can be analyzed. Those skilled in the art will appreciate that the light emitting apparatus 100 of fig. 1 is by way of example only, and that the light emitting apparatus may contain a different number or a different shape of light sources.
One or more location-indicating lights located near the light source used to convey information may additionally be included in the light-emitting device, which may aid the apparatus in recognizing the imaging of the light-emitting device from the image containing the light-emitting device. In one embodiment, in the identification, the position indicator lamp may be first identified in the image, thereby determining the approximate position of the light emitting device in the image. Fig. 2 shows an exemplary lighting device 200 comprising a position indicator light, which comprises three horizontally arranged information transmitting light sources 201, 202 and 203, and two vertically arranged position indicator light sources 204 and 205 on both sides of the information transmitting light sources.
In order to identify the light emitting device, in many cases, the identification apparatus needs to acquire a plurality of images containing the light emitting device by performing continuous image acquisition on the light emitting device through a camera thereon, and analyze the image of the light emitting device (or each light source in the light emitting device) in each image to identify the information delivered by the light emitting device. In identifying the information conveyed by the light emitting device, it is necessary to first detect the imaging area of the light emitting device (e.g., the area or location in the image where the light emitting device is imaged) from the entire image, and then obtain the information conveyed by the light emitting device at that time by analyzing the imaging of the light source in the light emitting device. However, in addition to the light-emitting device, a real scene also includes numerous and complicated other objects (for example, buildings, facilities, trees, people, lamps, and the like around the light-emitting device), which sometimes makes it difficult to detect the light-emitting device from the entire image, and thus the imaging area of the light-emitting device cannot be determined.
Therefore, a solution is needed to be able to easily detect the light emitting device from the entire real scene.
Disclosure of Invention
One aspect of the invention relates to a method for realizing detection of a lighting device, wherein the lighting device comprises a controller and one or more light sources, the controller can set a lighting mode of the light sources, and the method comprises the following steps: s1: detecting a characteristic of ambient light surrounding the light emitting device using an ambient light sensing device; s2: the controller of the light-emitting device sets the light-emitting mode of the light source of the light-emitting device according to the characteristics of the environment light so that the light source can present different characteristics from the environment light; s3: the identification device collects an image containing the light-emitting device by using an image collecting device and analyzes the image to obtain the optical characteristics of the environment in which the light-emitting device is positioned; s4: the recognition apparatus processes the image according to the optical characteristics of the environment and/or configures an image acquisition device to reacquire an image containing the light emitting device according to the optical characteristics of the environment; and S5: the recognition device analyzes the image to detect the light emitting device.
Preferably, the method further comprises: s6: if the light emitting device is not detected, the recognition apparatus processes the image according to the optical characteristics of the environment in a manner different from the step S4 and/or configures an image capturing device according to the optical characteristics of the environment in a manner different from the step S4 to re-capture the image containing the light emitting device; and S7: the recognition device analyzes the image to detect the light emitting device.
Preferably, wherein said processing said image according to optical characteristics of said environment comprises: processing the image and/or changing the brightness of the image in a particular color channel according to the optical characteristics of the environment.
Preferably, wherein the configuring of the image capture device to re-capture the image containing the light emitting apparatus according to the optical characteristics of the environment comprises: configuring an image capture device to re-capture an image containing the light emitting devices at a particular color channel and/or exposure level according to the optical characteristics of the environment.
Preferably, wherein the step S2 includes: the controller of the lighting device sets the color and/or intensity of the light emitted by the light source of the lighting device in accordance with the characteristics of the ambient light.
Another aspect of the invention relates to a system for enabling detection of a light emitting device, comprising: an ambient light sensing device for detecting a characteristic of ambient light around the light emitting apparatus; a lighting device comprising one or more light sources and a controller for setting a lighting pattern of the light sources in dependence on a characteristic of the ambient light to enable the light sources to present a different characteristic than the ambient light; and a recognition device having image capture means, the recognition device being configured to: acquiring an image containing the light-emitting device by using an image acquisition device, and analyzing the image to obtain the optical characteristics of the environment in which the light-emitting device is positioned; processing the image according to the optical characteristics of the environment and/or configuring an image acquisition device to reacquire an image containing the light emitting device according to the optical characteristics of the environment; and analyzing the image to detect the light emitting device.
Preferably, said processing said image according to optical characteristics of said environment comprises: processing the image and/or changing the brightness of the image in a particular color channel according to the optical characteristics of the environment.
Preferably, wherein the configuring of the image capture device to re-capture the image containing the light emitting apparatus according to the optical characteristics of the environment comprises: configuring an image capture device to re-capture an image containing the light emitting devices at a particular color channel and/or exposure level according to the optical characteristics of the environment.
Preferably, the setting of the light emitting manner of the light source includes setting the color and/or intensity of the light emitted by the light source.
Preferably, wherein the ambient light sensing means comprises sensing means for detecting a characteristic of ambient light at a front side of the light emitting device and sensing means for detecting a characteristic of ambient light at a rear side of the light emitting device.
One aspect of the invention relates to a storage medium in which a computer program is stored which, when being executed by a processor, can be used for carrying out the above-mentioned method.
One aspect of the invention relates to a computing device comprising a processor and a memory, in which a computer program is stored which, when being executed by the processor, is operative to carry out the method as described above.
By adopting the scheme of the invention, the method and the system for detecting the light-emitting device from the real scene are realized, the controller of the light-emitting device can set the light-emitting mode of the light source of the light-emitting device according to the characteristics of the ambient light, and the identification equipment can process the image according to the optical characteristics of the environment and/or configure the image acquisition device to acquire the image according to the optical characteristics of the environment, so that the light-emitting device can be easily detected from the complex environment.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
FIG. 1 illustrates an exemplary light emitting device;
FIG. 2 illustrates an exemplary light emitting device including a position indicator light;
FIG. 3 illustrates a system for enabling light emitting device detection according to one embodiment of the present invention;
FIG. 4 illustrates a method for implementing light emitting device detection according to one embodiment of the present invention; and
fig. 5 illustrates a method for implementing light emitting device detection according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 3 shows a system for enabling light emitting device detection according to one embodiment of the present invention, comprising a light emitting device 301, an identification device 303, and an ambient light sensing device 305.
The light emitting device 301 may be, for example, a device for optical communication purposes, which transmits information by light, or the light emitting device 301 may not be used for optical communication purposes, but may be used for other purposes, such as illumination, identification, positioning, and the like. The light emitting device 301 has a controller and one or more light sources, the controller can control the light emitting manner of some or all of the light sources in the light emitting device 301 (e.g., setting the intensity of the light emitted by the light sources, setting the color of the light emitted by the light sources, setting the frequency of the light sources flashing, etc.) so that the light sources can emit light in different manners at different times.
The recognition device 303 may be, for example, a device carried or controlled by a user (e.g., a cell phone, a tablet, smart glasses, AR glasses, a smart helmet, a smart watch, etc.), or may be a machine capable of autonomous movement (e.g., a drone, an unmanned automobile, a robot, etc.). The recognition apparatus 303 has an image pickup device (e.g., a camera) mounted thereon, and can use the image pickup device to obtain an image containing the light emitting device 301. The recognition device 303 may analyze the acquired image to recognize the light emitting apparatus 301 therein. The identification device 303 may detect the light emitting apparatus 301 in the image using any characteristic (e.g., structural characteristic, positional characteristic, color characteristic, etc.) of the light emitting apparatus 301 or a light source therein.
The ambient light sensing device 305 may be integrated or attached to the light emitting apparatus 301, or may be located near the light emitting apparatus 301 for detecting characteristics of ambient light surrounding the light emitting apparatus 301. The ambient light sensing device 305 is capable of transmitting the detected ambient light characteristic to the light emitting means 301. After obtaining the ambient light characteristic, the controller in the light emitting device 301 may set the lighting manner of the light source in the light emitting device 301 according to the ambient light characteristic, so that the light source can exhibit a characteristic different from the ambient light. In one embodiment, the intensity of the ambient light may be detected by the ambient light sensing device 305, and the luminous intensity of the light source in the lighting apparatus (i.e., the brightness of the light source) is set according to the intensity of the ambient light such that the light source is brighter than the surrounding environment. In one embodiment, the wavelength or color of the ambient light may be detected by the ambient light sensing device 305, and the wavelength or color of the light emitted by the light source in the light emitting apparatus is set according to the wavelength or color of the ambient light to distinguish the two.
In one embodiment, the ambient light sensing device 305 may comprise an ambient light sensing device for detecting an ambient light characteristic of a front side (i.e., a side on which the light source is located) of the light emitting apparatus 301, or may comprise an ambient light sensing device for detecting an ambient light characteristic of a back side (i.e., a side opposite to the side on which the light source is located) of the light emitting apparatus 301, or may comprise both.
Fig. 4 shows a method for enabling detection of a light emitting device according to an embodiment of the invention, which may be implemented using the system described above, and may comprise the steps of:
step 401: an ambient light sensing device is used to detect a characteristic of ambient light surrounding the light emitting device.
The ambient light sensing device may, for example, detect the intensity, color, etc. of the ambient light surrounding the light emitting device, thereby obtaining a characteristic of the ambient light surrounding the light emitting device. The characteristics of the ambient light may be transmitted to or used by the controller of the lighting arrangement.
Step 402: the controller of the light-emitting device sets the light-emitting manner of the light source of the light-emitting device according to the characteristics of the ambient light so that the light source can present different characteristics from the ambient light.
The controller of the lighting apparatus may set the lighting manner of some or all of the light sources in the lighting apparatus according to the ambient light characteristics detected by the ambient light sensing device, for example, set the lighting intensity of the light sources, set the color of the light emitted by the light sources, set the flashing frequency of the light sources, and so on, thereby enabling the light sources to present different characteristics from the surrounding environment. In one embodiment, if the ambient light sensing device detects that the intensity of the current ambient light is high, the light emitting apparatus may set the light emitting intensity of the light source to be high, so that it can be easily distinguished from the environment. In an embodiment, if the ambient light sensing device detects that the current ambient light is mainly blue light, the light emitting arrangement may set the light source to emit light of another color, e.g. red light. The controller of the light-emitting device may further consider other conditions when setting the light-emitting mode of the light source of the light-emitting device.
The controller of the light-emitting device may set the light-emitting modes of all the light sources in the light-emitting device, or may set the light-emitting modes of only some of the light sources. For example, for the lighting apparatus 200 shown in fig. 2, the controller of the lighting apparatus may set the lighting pattern of only the two positioning identification light sources 204 and 205.
Step 403: the recognition apparatus captures an image containing the light emitting device using an image capture device and analyzes the image to obtain optical characteristics of the environment in which the light emitting device is located.
The recognition apparatus may capture an image containing the light emitting device using an image capturing device and obtain an optical characteristic of an environment in which the light emitting device is located by analyzing the image. The optical characteristic of the environment in which the light-emitting device is located may be, for example, a color characteristic, a brightness characteristic, or the like of the environment. For example, if it is found by analyzing the image that the image as a whole appears blue or there are relatively many blue regions, it can be determined that the light-emitting device is located in an environment where more blue light is present.
Step 404: the identification device processes the image according to the optical characteristics of the environment and/or configures the image acquisition means to re-acquire the image containing the light emitting device according to the optical characteristics of the environment.
In one embodiment, the recognition device may process the image according to optical characteristics of the environment, for example, process the image in a particular color channel and/or change the brightness of the image to filter out some information in the image, particularly information not relevant to the imaging of the light emitting device. For example, if the optical characteristics of the environment indicate that the environment in which the light-emitting device is located has more blue light, the identification device may convert the image into an image of another color channel according to the optical characteristics, such as a red channel image, a green channel image, or a red-green channel image, so that a large amount of environment information may be filtered out. Since the controller of the lighting apparatus has set the lighting manner of the light source of the lighting apparatus in the above step 402 so that the light source presents different characteristics from the ambient light, when filtering out a large amount of environmental information in the step 404, information related to the light source of the lighting apparatus is not generally filtered out (i.e., the information filtered out in the step 404 is generally environmental information unrelated to the lighting apparatus), which is beneficial for the later analysis and detection of the lighting apparatus.
In one embodiment, the identification apparatus may configure the image capture device to re-capture an image containing the light emitting device at a particular color channel, exposure level, etc., based on the optical characteristics of the environment. For example, if the optical characteristics of the environment indicate that the ambient light of the image is mainly blue light, the identification device may configure the image capturing device according to the optical characteristics of the environment so that it is not sensitive to blue light, so that a large amount of blue information in the environment can be filtered out from the re-captured image containing the light emitting device, which is beneficial for the later analysis and detection of the light emitting device.
Step 405: the recognition device analyzes the image to detect the light emitting device.
For the image obtained in step 404, the recognition apparatus may analyze it to detect the light emitting device in the image, for example, to detect an imaging position or an imaging area of the light emitting device. In one embodiment, the identification device may detect the light emitting means in the image using characteristics of the light emitting means or a light source therein. The characteristics of the lighting arrangement or the light sources therein may be any characteristics related to one or more light sources in the lighting arrangement, e.g. the number of light sources, the shape of the light sources, the arrangement of the light sources, the mutual position of the light sources, etc. Since a large amount of environmental information irrelevant to the light emitting device has been filtered out from the image to be analyzed, the recognition apparatus can easily detect the light emitting device from the image.
FIG. 5 shows a method for implementing detection of a light emitting device according to another embodiment of the present invention, which may include steps 401 and 405 shown in FIG. 4, and may further include the following steps:
step 406: if a light emitting device is not detected, the identification apparatus processes the image differently from step 404 depending on the optical characteristics of the environment and/or configures the image capture device to re-capture the image containing the light emitting device differently from step 404 depending on the optical characteristics of the environment.
For example, if the optical characteristics of the environment indicate that the light-emitting device is in an environment with more blue light, and the recognition device converts the image to a red channel image based on the optical characteristics in step 404, but does not detect the image, then the recognition device may try again to convert the image to a green channel image in step 406.
Step 407: the recognition device analyzes the image to detect the light emitting device.
The above steps 406 and 407 may be repeated a number of times to process the image or to recapture the image in different ways until a light emitting device is detected.
After detecting the imaging of the light emitting device, the recognition apparatus may recognize information conveyed by the light emitting device, and may also obtain other information based on the imaging of the light emitting device (e.g., obtaining position and/or attitude information of the recognition apparatus relative to the light emitting device based on the size and/or perspective distortion of the imaging of the light emitting device, etc.), which may be used to enable information interaction, location-based services, and so forth.
In one embodiment of the invention, the invention may be implemented in the form of a computer program. The computer program may be stored in various storage media (e.g., hard disk, optical disk, flash memory, etc.), which when executed by a processor, can be used to implement the methods of the present invention.
In another embodiment of the invention, the invention may be implemented in the form of an electronic device. The electronic device comprises a processor and a memory in which a computer program is stored which, when being executed by the processor, can be used for carrying out the method of the invention. The electronic device may be an identification device as described herein and may have a camera mounted thereon.
The term "coupled" as used herein encompasses situations in which two devices are directly connected, either by wire and/or wirelessly, as well as situations in which two devices are indirectly connected, either by wire and/or wirelessly, through other intermediate devices.
References herein to "various embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this document are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logically inconsistent or workable. Expressions appearing herein similar to "according to a", "based on a", "by a" or "using a" mean non-exclusive, i.e. "according to a" may cover "according to a only", and also "according to a and B", unless it is specifically stated that the meaning is "according to a only". In the present application, for clarity of explanation, some illustrative operational steps are described in a certain order, but one skilled in the art will appreciate that each of these operational steps is not essential and some of them may be omitted or replaced by others. It is also not necessary that these operations be performed sequentially in the manner shown, but rather that some of these operations be performed in a different order, or in parallel, as desired, provided that the new implementation is not logically or operationally unfeasible.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention. Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.
Claims (11)
1. A method for enabling luminaire detection, wherein the luminaire comprises one or more light sources and a controller, the controller being capable of setting a lighting pattern of the light sources, the method comprising:
s1: detecting a characteristic of ambient light surrounding the light emitting device using an ambient light sensing device;
s2: the controller of the light-emitting device sets the light-emitting mode of the light source of the light-emitting device according to the characteristics of the environment light so that the light source can present different characteristics from the environment light;
s3: the identification device collects an image containing the light-emitting device by using an image collecting device and analyzes the image to obtain the optical characteristics of the environment in which the light-emitting device is positioned;
S4: the identification equipment processes the image and/or changes the brightness of the image according to the optical characteristics of the environment by a specific color channel so as to filter out environment information which is not related to the imaging of the light-emitting device; and
s5: the identification device analyzes the image using characteristics of the light emitting means or light sources therein to detect the light emitting means.
2. The method of claim 1, further comprising:
s6: if the light emitting device is not detected, the recognition apparatus processes the image according to the optical characteristics of the environment in a different manner from the step S4 and/or configures an image capture device to re-capture the image containing the light emitting device according to the optical characteristics of the environment; and
s7: the identification device analyzes the image using characteristics of the light emitting means or light sources therein to detect the light emitting means.
3. The method according to claim 1, wherein the step S2 includes:
the controller of the lighting device sets the color and/or intensity of the light emitted by the light source of the lighting device in accordance with the characteristics of the ambient light.
4. The method of claim 2, wherein said configuring an image capture device to re-capture an image containing the light emitting apparatus according to the optical characteristics of the environment comprises:
Configuring an image capture device to re-capture an image containing the light emitting devices at a particular color channel and/or exposure level according to the optical characteristics of the environment.
5. A system for enabling luminaire detection, comprising:
an ambient light sensing device for detecting a characteristic of ambient light around the light emitting apparatus;
a lighting arrangement comprising one or more light sources and a controller, the controller being configured to set a lighting pattern of the light sources in dependence on a characteristic of the ambient light to enable the light sources to present a different characteristic than the ambient light; and
an identification device having image capture means, the identification device configured to:
acquiring an image containing the light-emitting device by using an image acquisition device;
analyzing the image to obtain optical characteristics of an environment in which the light-emitting device is located;
processing the image and/or changing the brightness of the image according to the optical characteristics of the environment by a specific color channel so as to filter out environment information which is not related to the imaging of the light-emitting device; and
analyzing the image to detect the light emitting device.
6. The system of claim 5, wherein setting the manner in which the light source emits light comprises setting a color and/or intensity of light emitted by the light source.
7. The system of claim 5, the identification device further configured to:
configuring an image capture device to re-capture an image containing the light emitting device according to optical characteristics of the environment if the light emitting device is not detected; and
the image is analyzed using characteristics of the light emitting device or a light source therein to detect the light emitting device.
8. The system of claim 7, wherein said configuring the image capture device to re-capture the image containing the light emitting apparatus according to the optical characteristics of the environment comprises:
configuring an image capture device to re-capture an image containing the light emitting devices at a particular color channel and/or exposure level according to the optical characteristics of the environment.
9. The system of claim 5, wherein the ambient light sensing device comprises a sensing device for detecting a characteristic of ambient light at a front side of the light emitting apparatus and a sensing device for detecting a characteristic of ambient light at a rear side of the light emitting apparatus.
10. A storage medium in which a computer program is stored which, when being executed by a processor, is operative to carry out the method of any one of claims 1-4.
11. A computing device comprising a processor and a memory, the memory having stored therein a computer program operable to carry out the method of any one of claims 1 to 4 when the computer program is executed by the processor.
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