CN112019826A - Projection method, system, device, electronic equipment and storage medium - Google Patents
Projection method, system, device, electronic equipment and storage medium Download PDFInfo
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- CN112019826A CN112019826A CN202010921696.7A CN202010921696A CN112019826A CN 112019826 A CN112019826 A CN 112019826A CN 202010921696 A CN202010921696 A CN 202010921696A CN 112019826 A CN112019826 A CN 112019826A
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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
- H04N9/315—Modulator illumination systems
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
Abstract
The present disclosure provides a projection method, system, apparatus, electronic device and storage medium, the method comprising: acquiring a target image which is shot by a camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface; identifying an image position area, corresponding to a target obstacle between the projection equipment and the image display area, on the target image based on the target image; determining information of a target projection area blocked by the target obstacle in a projection image of the projection equipment based on the image position area; and controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
Description
Technical Field
The present disclosure relates to the field of image processing technologies, and in particular, to a projection method, a projection system, a projection apparatus, an electronic device, and a storage medium.
Background
At present, projection apparatuses are widely used in various places, such as meeting rooms, classrooms, bedrooms, cinemas, etc., so that the projection apparatuses play an important role in various aspects of work, life, entertainment, etc. of users. The projection equipment is used for projecting an image through the lens, wherein the working process of the projection equipment is to irradiate light rays onto the image display element so as to generate the image.
Generally, in the projection process, when an obstacle exists between the projection device and the projection surface, the corresponding projection content is projected onto the obstacle, the sight of a teacher or other people using the projection device is blocked due to the situation, and the attention of students is dispersed when the students look at the teacher or other people using the projection device, so that the lecture hall effect is affected.
Disclosure of Invention
In view of the above, the present disclosure provides at least a projection method, a projection system, an apparatus, an electronic device and a storage medium.
In a first aspect, the present disclosure provides a projection method, including:
acquiring a target image which is shot by a camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
identifying an image position area, corresponding to a target obstacle between the projection equipment and the image display area, on the target image based on the target image;
determining information of a target projection area blocked by the target obstacle in a projection image of the projection equipment based on the image position area;
and controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
By adopting the method, under the condition that a barrier (such as an instructor) is blocked between the projection equipment and the image display area, the output of the projection light corresponding to the target projection area of the blocked part is automatically adjusted, for example, the intensity of the projection light corresponding to the target projection area in the projection equipment is controlled to be weakened or not output, and the like, so that the influence of the projection light on the barrier is avoided, for example, the influence on the sight of the instructor is reduced, the dizzy feeling is reduced, and the problem that the attention of students is dispersed when the students see the instructor is avoided as much as possible.
In one possible embodiment, identifying an image location area of a target obstacle on the target image, the image location area being located between the projection device and the image display area, based on the target image, includes:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In the above embodiment, by determining the key point information of the target obstacle in the target image, where the key point is a key position point in the target obstacle, the plurality of key position points may represent the shape of the target obstacle more accurately, so that based on the key point information of the target obstacle, the image position area of the target obstacle on the target image may be determined more accurately.
In a possible embodiment, the determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image position area includes:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
Here, the first distance between the target obstacle and the camera and the second distance between the projection device and the image display area are related to the area of the target projection area, so that the information of the target projection area blocked by the target obstacle in the projection image of the projection device can be determined more accurately by the image position area, the first distance, and the second distance.
In a possible embodiment, determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area includes:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In one possible embodiment, controlling the output of the projection light of the projection device according to the information of the determined target projection area includes:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
In one possible embodiment, controlling the output of the projection light of the plurality of pixel points located in the target projection area in the projection image of the projection device includes:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
Here, for example, the light intensity output by the projection light of the plurality of pixel points located in the target projection area in the projection image of the projection device is controlled to be weak, or the color saturation becomes low, so that the shaking degree of the projection image in the projection process can be reduced, and the display effect of the projection image is improved.
The following descriptions of the effects of the apparatus, the electronic device, and the like refer to the description of the above method, and are not repeated here.
In a second aspect, the present disclosure provides a projection system comprising: a projection device and a camera; the projection equipment is in communication connection with the camera; the first field angle corresponding to the projection equipment is smaller than the second field angle corresponding to the camera, and the image pickup area shot by the camera at the same depth position covers the image display area projected by the projection equipment;
the camera is used for shooting a target image containing an image display area and identifying an image position area of a target obstacle between the projection equipment and the image display area on the target image based on the target image; and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area;
and the projection equipment is used for receiving the information of the target projection area sent by the camera and controlling the output of the projection light according to the determined information of the target projection area.
In one possible embodiment, the first frame rate of the projection device is less than the second frame rate of the camera.
In a possible embodiment, the camera, when identifying, based on the target image, an image location area of a target obstacle on the target image, the target obstacle being located between the projection device and the image display area, is specifically configured to:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In a possible embodiment, the method further comprises: a distance sensor;
the distance sensor is used for determining a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area;
the camera is used for determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, and is used for:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
In one possible embodiment, the camera, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area, is configured to:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In one possible embodiment, the projection device, when controlling the output of the projection light of the projection device according to the information of the determined target projection area, is configured to:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
In one possible embodiment, the projection device, when controlling output of projection light of a plurality of pixel points located in the target projection area in the projection image of the projection device, is configured to:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
In a third aspect, the present disclosure provides a projection apparatus, comprising:
the acquisition module is used for acquiring a target image which is shot by the camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
the identification module is used for identifying an image position area, corresponding to a target obstacle, between the projection equipment and the image display area, on the target image based on the target image;
a determination module, configured to determine, based on the image location area, information of a target projection area that is occluded by the target obstacle in the projection image of the projection device;
and the control module is used for controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
In one possible embodiment, the identifying module, when identifying an image location area on the target image of a target obstacle located between the projection device and the image display area based on the target image, is configured to:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In a possible embodiment, the determining module, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, is configured to:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
In one possible embodiment, the determining module, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area, is configured to:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In one possible embodiment, the control module, when controlling the output of the projection light of the projection device according to the information of the determined target projection area, is configured to:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
In one possible embodiment, the control module, when controlling output of projection light of a plurality of pixel points located in the target projection area in the projection image of the projection device, is configured to:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
In a fourth aspect, the present disclosure provides an electronic device comprising: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating via the bus when the electronic device is running, the machine-readable instructions when executed by the processor performing the steps of the projection method according to the first aspect or any of the embodiments.
In a fifth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the projection method according to the first aspect or any one of the embodiments.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly described below, and the drawings herein incorporated in and forming a part of the specification illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the technical solutions of the present disclosure. It is appreciated that the following drawings depict only certain embodiments of the disclosure and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.
Fig. 1 is a schematic flow chart of a projection method provided by an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating an embodiment of a projection method according to an embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating an embodiment of a projection method according to an embodiment of the present disclosure;
fig. 4a is a schematic diagram illustrating an architecture of a projection system provided by an embodiment of the present disclosure;
FIG. 4b is a schematic diagram illustrating a deployment of a projection system provided by an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating an architecture of a projection apparatus provided in an embodiment of the disclosure;
fig. 6 shows a schematic structural diagram of an electronic device 600 provided in an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. The components of the embodiments of the present disclosure, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present disclosure, presented in the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the disclosure without making creative efforts, shall fall within the protection scope of the disclosure.
Generally, in the projection process, when an obstacle exists between the projection device and the projection surface, the corresponding projection content is projected onto the obstacle, the sight of a teacher or other people using the projection device is blocked due to the situation, and the attention of students is dispersed when the students look at the teacher or other people using the projection device, so that the lecture hall effect is affected. Therefore, in order to improve the display effect of the projection content, the embodiments of the present disclosure provide a projection method, a projection system, a projection apparatus, an electronic device, and a storage medium.
For the purpose of understanding the embodiments of the present disclosure, a detailed description will be given of a projection method disclosed in the embodiments of the present disclosure. The projection method may be applied to a projection apparatus provided with a camera, or to a projection apparatus provided with a camera and a distance sensor. The projection method can also be applied to a projection system, wherein the projection system comprises a projection device and a camera; or the projection system comprises a projection device, a camera and a distance sensor; the camera is in communication connection with the projection device, and the camera is in communication connection with the distance sensor.
Referring to fig. 1, a schematic flow chart of a projection method provided in the embodiment of the present disclosure is shown, the method includes S101-S104, where:
s101, acquiring a target image which is shot by a camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
s102, identifying an image position area corresponding to a target obstacle between the projection equipment and the image display area on the target image based on the target image;
s103, determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area;
and S104, controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
In the method, based on the acquired target image, an image position area corresponding to a target obstacle between the projection equipment and the image display area on the target image is identified; determining information of a target projection area shielded by a target obstacle in a projection image of the projection equipment based on the image position area; and then controlling the output of the projection light of the projection equipment according to the determined information of the target projection area, and by adopting the method, under the condition that an obstacle (such as an instructor) is blocked between the projection equipment and the image display area, automatically adjusting the output of the projection light corresponding to the target projection area of the blocked part, such as controlling the intensity of the projection light corresponding to the target projection area in the projection equipment to be weakened or not to be output, and the like, so that the projection light is prevented from influencing the obstacle, such as reducing the influence on the sight of the instructor and reducing the dizzy feeling, and the problem that the attention of students is dispersed when the students watch the instructor is avoided as much as possible.
For S101:
here, the image display area is a display area of a projection image of the projection apparatus on a projection surface, wherein the projection surface may be a projection screen, a wall surface, or the like. The target image includes image information corresponding to the image display area. For example, the first field angle of the camera may be set to be larger than the second field angle of the projection device, so that when the camera and the projection device are set at the same position, the target image captured by the camera may include the image display area corresponding to the projection device.
In an implementation, the camera may capture multiple frames of target images including the image display region at a set capture frequency.
For S102:
here, the target obstacle may be any object between the photographing apparatus and the image display area, for example, the target obstacle may be an object, a human body, or the like. For example, the target image may be input to an Artificial Intelligence (AI) algorithm after training to determine an image location area of the target obstacle in the target image. An Artificial Intelligence (AI) algorithm is, for example, a detection algorithm of a target obstacle, for example, a key point detection algorithm for an obstacle, or the like.
In an alternative embodiment, referring to a flowchart of an embodiment of a projection method shown in fig. 2, S102 specifically includes S1021 and S1022, where:
s1021, determining key point information of the target obstacle in the target image.
S1022, determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In S1021, the keypoint information of the target obstacle in the target image may be determined, where the number and the position of the keypoints on the target obstacle may be set according to actual needs, for example, when the target obstacle is a human, the number of the keypoints may be at least one, and the distribution positions of the keypoints include, but are not limited to: a human body center position, a head top position, a neck position, a shoulder position, an elbow joint position, a hand center position, a wrist joint position, a crotch position, a hip joint position, a knee joint position, a foot joint position, and the like.
In specific implementation, the trained keypoint detection algorithm can be used for detecting the target image, and the keypoint information of the target obstacle in the target image is determined, namely the position information of at least one keypoint of the target obstacle in the target image is determined.
The training process of the key point detection algorithm may be: acquiring a first sample image, wherein the first sample image carries the marked key point information of the barrier; and training the key point detection algorithm to be trained by using the first sample image until the accuracy of the key point detection algorithm is greater than the set accuracy threshold value to obtain the trained key point detection algorithm.
In S1022, after obtaining the key point information of the target obstacle, that is, after obtaining the position information of at least one key point included in the target obstacle, the image position area of the target obstacle on the target image may be determined based on the key point information of the target obstacle. For example, the image position area of the target obstacle on the target image may be determined according to the determined position information of the at least one key point and the set area information (area shape, area, etc.) corresponding to the target obstacle. Alternatively, a region surrounded by the position information of the plurality of key points may be determined as an image position region of the target obstacle on the target image. Alternatively, two first key points which are farthest away in the horizontal direction in the plurality of key points and two second key points which are farthest away in the vertical direction in the plurality of key points may be determined based on the position information of the plurality of key points, and a matrix area determined based on the first key points and the second key points may be determined as an image position area of the target obstacle on the target image.
Specifically, the process of determining the image position area of the target obstacle on the target image may be flexibly set according to the number and the position of the determined key points, which is only an exemplary illustration here.
For example, a contour image area of the target obstacle may be determined based on the target image and a trained image segmentation algorithm, and the contour image area may be determined as an image position area of the target obstacle on the target image.
The training process of the image segmentation algorithm comprises the following steps: acquiring a second sample image, wherein the second sample image carries the marked outline area information of the obstacle; and training the image segmentation algorithm to be trained by using the second sample image until the accuracy of the image segmentation algorithm is greater than the set accuracy threshold value, so as to obtain the trained image segmentation algorithm.
In the above embodiment, by determining the key point information of the target obstacle in the target image, where the key point is a key position point in the target obstacle, the plurality of key position points may represent the shape of the target obstacle more accurately, so that based on the key point information of the target obstacle, the image position area of the target obstacle on the target image may be determined more accurately.
For S103:
here, after determining an image position area corresponding to the target obstacle on the target image, information of a target projection area blocked by the target obstacle in the projection image of the projection apparatus may be determined based on the image position area.
For example, the coordinates of the target image and the image corresponding to the image display area may be aligned, and after the target image and the image coordinates are aligned, information of a target projection area blocked by the target obstacle in the projection image of the projection apparatus may be determined based on the image position area on the target image. Or, a coordinate conversion matrix between the target image and the image corresponding to the image display area may be determined, the coordinate information corresponding to the image position area may be converted into the coordinate system of the image corresponding to the image display area, and the information of the target projection area blocked by the target obstacle in the projection image of the projection apparatus may be determined based on the coordinate information after the coordinate conversion.
The information of the target projection area may be position information of a plurality of pixel points on the projection image, which are shielded by the target obstacle. In specific implementation, the image display area can be divided into m × n grids, the number of the grids is consistent with the number of the pixel points of the projected image, and each grid corresponds to one pixel point in the projected image. Based on the image position area, determining the position information of a plurality of grids shielded by the target obstacle in the image display area, and further determining the position information of a plurality of shielded pixels according to the corresponding relation between the grids and the pixels and the position information of a plurality of grids shielded by the target obstacle in the image display area, namely obtaining the information of the target projection area shielded by the target obstacle in the projection image of the projection equipment.
The area of a target projection area blocked by the target obstacle in a projection image of the projection equipment is different when the distance between the target obstacle and the projection equipment is different for the same target obstacle. For example, under the condition that the distance between the projection device and the image display area is not changed, if the distance between the target obstacle and the projection device is short, the area of the target projection area blocked by the target obstacle in the projection image of the projection device is large; if the distance between the target obstacle and the projection equipment is long, the area of a target projection area blocked by the target obstacle in the projection image of the projection equipment is small.
Therefore, in S103, determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image position area may include: and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
Here, a first distance between the target obstacle and the camera and a second distance between the projection device and the image display area are determined by using the distance sensor, wherein the distance between the projection device and the target obstacle can be determined according to the set distance between the camera and the projection device, and in the implementation, the position of the camera and the position of the projection device can be the same, so that the first distance can be the distance between the target obstacle and the projection device.
And determining the information of a target projection area blocked by the target obstacle in the projection image of the projection equipment according to the image position area, the first distance and the second distance. The information of the target projection area may be pixel position information corresponding to a target obstacle on the image display area.
Here, the first distance between the target obstacle and the camera and the second distance between the projection device and the image display area are related to the area of the target projection area, so that the information of the target projection area blocked by the target obstacle in the projection image of the projection device can be determined more accurately by the image position area, the first distance, and the second distance.
In an alternative embodiment, referring to fig. 3, in S103, determining information of a target projection area blocked by the target obstacle in the projection image of the projection apparatus based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection apparatus and the image display area specifically includes:
and S1031, converting first coordinate information of a plurality of key points of the target obstacle in the image position area under a first image coordinate system corresponding to the target image into second coordinate information of the plurality of key points under a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system.
S1032, determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In step one, for example, a coordinate transformation matrix between a first image coordinate system corresponding to the image position area and a second image coordinate system corresponding to the image display area may be determined; first coordinate information of a plurality of key points of the target obstacle in the image position area under a first image coordinate system is converted into second coordinate information of a plurality of key points under a second image coordinate system by using a coordinate conversion matrix, and second coordinate information of the plurality of key points under the second image coordinate system is generated.
And performing coordinate alignment processing on the target image and the image corresponding to the image display area, and determining second coordinate information of a plurality of key points of the target obstacle in the image position area under a second image coordinate based on the aligned target image and the aligned image.
In step two, in implementation, the scaling may be determined based on the first distance and the second distance, for example, when the distance between the projection device and the target obstacle is equal to the first distance, a quotient of the first distance and the second distance may be determined as the scaling. Adjusting second coordinate information of the plurality of key points in a second image coordinate system according to the scaling; and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment by using the adjusted second coordinate information.
For S104:
here, after determining the information of the target projection area, the output of the projection light of the projection apparatus may be controlled.
In an alternative embodiment, controlling the output of the projection light of the projection device according to the determined information of the target projection area may include: and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
Here, a plurality of pixel points located in the target projection area in the projection image of the projection device may be determined according to the determined information of the target projection area; and controlling the output of the projection light rays of the determined pixel points, so that the output of the projection light rays corresponding to the target projection area is different from the output of the projection light rays of other areas on the target projection area.
Controlling the output of projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the following steps:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
Here, the light intensity of the projection light output of the plurality of pixel points located in the target projection area in the projection image of the projection device may be controlled, for example, the light intensity of the projection light output of the plurality of pixel points located in the target projection area may be weakened, or the projection light of the plurality of pixel points located in the target projection area may not be output, so that no projection light output is provided on the target projection area.
The color saturation output by the projection light of the plurality of pixel points located in the target projection area in the projection image of the projection device may also be controlled, for example, the color saturation output by the projection light of the plurality of pixel points located in the target projection area may be reduced, that is, the light content ratio between the colored light (red light, green light, blue light) and the white light in the projection light of the plurality of pixel points located in the target projection area is reduced. There are various ways to control the output of the projection light of the plurality of pixel points located in the target projection area in the projection image of the projection device, and this is only an exemplary description.
Here, for example, the light intensity output by the projection light of the plurality of pixel points located in the target projection area in the projection image of the projection device is controlled to be weak, or the color saturation becomes low, so that the shaking degree of the projection image in the projection process can be reduced, and the display effect of the projection image is improved.
It will be understood by those skilled in the art that in the method of the present invention, the order of writing the steps does not imply a strict order of execution and any limitations on the implementation, and the specific order of execution of the steps should be determined by their function and possible inherent logic.
Based on the same concept, the embodiment of the present disclosure further provides a projection system, as shown in fig. 4a, which is an architecture schematic diagram of the projection system provided by the embodiment of the present disclosure, and includes a projection device 401 and a camera 402, where the projection device 401 is connected to the camera 402 in a communication manner; a first field angle corresponding to the projection device 401 is smaller than a second field angle corresponding to the camera 402, and an image pickup area shot by the camera at the same depth position covers an image display area projected by the projection device;
the camera 402 is configured to capture a target image including a video display area, and identify an image position area of a target obstacle located between the projection device and the video display area on the target image based on the target image; and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area;
the projection device 401 is configured to receive information of the target projection area sent by the camera, and control output of projection light according to the determined information of the target projection area.
In particular, the deployment of the projection system is schematically shown in fig. 4b, where fig. 4b includes a projection device 401 and a camera 402, and the camera 402 and the projection device 401 may be deployed at the same position; the first field angle 4011 corresponding to the projection equipment is smaller than the second field angle 4021 corresponding to the camera; it is known that the imaging area 4022 photographed by the camera at the same depth position covers the picture display area 4012 projected by the projection apparatus.
In an alternative embodiment, the first frame rate of the projection device 401 is less than the second frame rate of the camera 402.
Here, in consideration of real-time performance between the camera and the projection apparatus, the first frame rate of the projection apparatus may be set to be lower than the second frame rate of the camera, for example, the first frame rate may be 30 frames, and the second frame rate may be 60 frames, so that no significant time delay may occur between the projection image projected on the image display area by the projection apparatus and the movement of the target obstacle.
In an alternative embodiment, the camera 402, when identifying an image location area of a target obstacle on the target image, the image location area being located between the projection device and the image display area, is specifically configured to:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In an alternative embodiment, the method further comprises: a distance sensor 403;
the distance sensor 403 is configured to determine a first distance between the target obstacle and the camera and a second distance between the projection device and the image display area;
the camera 402, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image position area, is configured to:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
In an alternative embodiment, the camera 402, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area, is configured to:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In an alternative embodiment, the projection device 401, when controlling the output of the projection light of the projection device according to the information of the determined target projection area, is configured to:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
In an optional implementation manner, the projection device 401, when controlling output of projection light of a plurality of pixel points located in the target projection area in the projection image of the projection device, is configured to:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
The following description will be made of the Light intensity of the projection Light output of the control pixel, taking the projection apparatus as a Digital Light Processing (DLP) projector as an example. A Digital Micromirror (DMD) is provided on a DLP projector, the DMD is composed of X small mirrors, where X is a resolution value and X is a positive integer, for example, if the resolution is 1920 × 1080, X is 1920 × 1080 ═ 2073600, each small mirror on the DMD controls one pixel in a projected image, and each small mirror on the DMD corresponds to one grid on an image display area, and when the resolution is 1920 × 1080, the image display area can be divided into 1920 × 1080 grids (m is 1920, n is 1080).
During specific implementation, after position information of a plurality of pixel points shielded by a target obstacle on a projected image is obtained, target small lenses corresponding to the plurality of pixel points shielded on the DMD are determined according to the position information of the plurality of pixel points shielded by the target obstacle, and the light intensity of the projected light output of the pixel points corresponding to the target small lenses is controlled by adjusting the inclination angles of the target small lenses.
For example, the inclination angle of the small target lens is adjusted, if the small target lens is inclined by plus +10 °, the small target lens is in an on state, and the light intensity output by the projection light of the pixel point corresponding to the small target lens is the maximum; if the small target lens is inclined by minus-10 degrees, the small target lens is in an off state, and the light intensity output by the projection light of the pixel point corresponding to the small target lens is zero.
In some embodiments, the functions of the apparatus provided in the embodiments of the present disclosure or the included templates may be used to execute the method described in the above method embodiments, and specific implementation thereof may refer to the description of the above method embodiments, and for brevity, no further description is provided here.
Based on the same concept, an embodiment of the present disclosure further provides a projection apparatus, as shown in fig. 5, which is an architecture schematic diagram of the projection apparatus provided in the embodiment of the present disclosure, and includes an obtaining module 501, an identifying module 502, a determining module 503, and a control module 504, specifically:
an obtaining module 501, configured to obtain a target image that is captured by a camera and includes an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
an identifying module 502, configured to identify, based on the target image, an image position area on the target image corresponding to a target obstacle located between the projection device and the image display area;
a determining module 503, configured to determine, based on the image location area, information of a target projection area that is blocked by the target obstacle in the projection image of the projection device;
and a control module 504, configured to control output of the projection light of the projection device according to the determined information of the target projection area.
In one possible implementation, the identifying module 502, when identifying, based on the target image, an image location area on the target image of a target obstacle located between the projection device and the image display area, is configured to:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
In a possible implementation, the determining module 503, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, is configured to:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
In a possible implementation, the determining module 503, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection apparatus based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection apparatus and the image display area, is configured to:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
In one possible implementation, the control module 504, when controlling the output of the projection light of the projection device according to the determined information of the target projection area, is configured to:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
In one possible implementation, the control module 504, when controlling output of projection light of a plurality of pixel points located in the target projection area in the projection image of the projection device, is configured to:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
In some embodiments, the functions of the apparatus provided in the embodiments of the present disclosure or the included templates may be used to execute the method described in the above method embodiments, and specific implementation thereof may refer to the description of the above method embodiments, and for brevity, no further description is provided here.
Based on the same technical concept, the embodiment of the disclosure also provides an electronic device. Referring to fig. 6, a schematic structural diagram of an electronic device provided in the embodiment of the present disclosure includes a processor 601, a memory 602, and a bus 603. The memory 602 is used for storing execution instructions and includes a memory 6021 and an external memory 6022; the memory 6021 is also referred to as an internal memory, and is configured to temporarily store the operation data in the processor 601 and the data exchanged with the external memory 6022 such as a hard disk, the processor 601 exchanges data with the external memory 6022 through the memory 6021, and when the electronic device 600 operates, the processor 601 communicates with the memory 602 through the bus 603, so that the processor 601 executes the following instructions:
acquiring a target image which is shot by a camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
identifying an image position area, corresponding to a target obstacle between the projection equipment and the image display area, on the target image based on the target image;
determining information of a target projection area blocked by the target obstacle in a projection image of the projection equipment based on the image position area;
and controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
Furthermore, the disclosed embodiments also provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the projection method described in the above method embodiments.
The computer program product of the projection method provided in the embodiments of the present disclosure includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the steps of the projection method described in the above method embodiments, which may be referred to specifically in the above method embodiments, and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above are only specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and shall be covered by the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (16)
1. A method of projection, comprising:
acquiring a target image which is shot by a camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
identifying an image position area, corresponding to a target obstacle between the projection equipment and the image display area, on the target image based on the target image;
determining information of a target projection area blocked by the target obstacle in a projection image of the projection equipment based on the image position area;
and controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
2. The projection method of claim 1, wherein identifying an image location area on the target image of a target obstacle located between the projection device and the image display area based on the target image comprises:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
3. The projection method according to claim 1 or 2, wherein the determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image position area comprises:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
4. The projection method according to claim 3, wherein determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area comprises:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
5. The projection method according to any one of claims 1 to 4, wherein controlling the output of the projection light of the projection device according to the information of the determined target projection area comprises:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
6. The projection method of claim 5, wherein controlling the output of the projected light of the plurality of pixel points located in the target projection area in the projected image of the projection device comprises:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
7. A projection system, comprising: a projection device and a camera; the projection equipment is in communication connection with the camera; the first field angle corresponding to the projection equipment is smaller than the second field angle corresponding to the camera, and the image pickup area shot by the camera at the same depth position covers the image display area projected by the projection equipment;
the camera is used for shooting a target image containing an image display area and identifying an image position area of a target obstacle between the projection equipment and the image display area on the target image based on the target image; and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area;
and the projection equipment is used for receiving the information of the target projection area sent by the camera and controlling the output of the projection light according to the determined information of the target projection area.
8. The projection system of claim 7, wherein a first frame rate of the projection device is less than a second frame rate of the camera.
9. The projection system of claim 8, wherein the camera, when identifying, based on the target image, an image location area on the target image of a target obstacle located between the projection device and the imagery display area, is specifically configured to:
determining key point information of the target obstacle in the target image;
determining the image position area of the target obstacle on the target image based on the key point information of the target obstacle.
10. The projection system of any of claims 7 to 9, further comprising: a distance sensor;
the distance sensor is used for determining a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area;
the camera is used for determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, and is used for:
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the image position area, a first distance between the target obstacle and the camera and a second distance between the projection equipment and the image display area.
11. The projection system of claim 10, wherein the camera, when determining information of a target projection area blocked by the target obstacle in the projection image of the projection device based on the image location area, a first distance between the target obstacle and the camera, and a second distance between the projection device and the image display area, is configured to:
converting first coordinate information of a plurality of key points of a target obstacle in the image position area under a first image coordinate system corresponding to the target image into a second image coordinate system corresponding to the image display area to obtain second coordinate information of the plurality of key points under the second image coordinate system;
and determining information of a target projection area blocked by the target obstacle in the projection image of the projection equipment based on the second coordinate information, the first distance and the second distance of the plurality of key points in the second image coordinate system.
12. The projection system according to any one of claims 7 to 11, wherein the projection device, when controlling the output of the projection light of the projection device according to the information of the determined target projection area, is configured to:
and controlling the output of the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment according to the determined information of the target projection area.
13. The projection system of claim 12, wherein the projection device, in controlling the output of the projected light at the plurality of pixel points of the target projection area in the projected image from the projection device, is configured to:
and controlling the light intensity output by the projection light of a plurality of pixel points positioned in the target projection area in the projection image of the projection equipment and/or the color saturation output by the projection light.
14. A projection device, comprising:
the acquisition module is used for acquiring a target image which is shot by the camera and contains an image display area; the image display area is a display area of a projection image of the projection equipment on a projection surface;
the identification module is used for identifying an image position area, corresponding to a target obstacle, between the projection equipment and the image display area, on the target image based on the target image;
a determination module, configured to determine, based on the image location area, information of a target projection area that is occluded by the target obstacle in the projection image of the projection device;
and the control module is used for controlling the output of the projection light of the projection equipment according to the determined information of the target projection area.
15. An electronic device, comprising: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine-readable instructions when executed by the processor performing the steps of the projection method of any of claims 1 to 6.
16. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the projection method according to one of claims 1 to 6.
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