CN111246116A - Method for intelligent framing display on screen and mobile terminal - Google Patents
Method for intelligent framing display on screen and mobile terminal Download PDFInfo
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- CN111246116A CN111246116A CN202010200994.7A CN202010200994A CN111246116A CN 111246116 A CN111246116 A CN 111246116A CN 202010200994 A CN202010200994 A CN 202010200994A CN 111246116 A CN111246116 A CN 111246116A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/53—Constructional details of electronic viewfinders, e.g. rotatable or detachable
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
- H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
Abstract
The invention belongs to the field of artificial intelligence, and relates to a method and a mobile terminal for intelligent framing display on a screen, which solve the problem that a display target cannot be accurately realized, such as manual amplification, framing and focusing. The space coordinates of human eyes are collected at any moment, the screen does not need to be adjusted when a person moves, and the view is intelligently looked up; when the frame is narrow enough, the screen can be invisible and can be falsified.
Description
Technical Field
The invention belongs to the field of artificial intelligence, and particularly relates to a method and a mobile terminal for intelligent framing display on a screen.
Background
The current development wave of the artificial intelligence industry mainly comes from the proposal of a deep learning algorithm, realizes large-scale calculation on the basis of data volume and calculation capacity, and belongs to technical breakthrough. Belongs to super artificial intelligence, and has room for continuous breakthrough in the basic theory research on the aspects of consciousness origin, human brain mechanism and the like.
The development fields of the entrepreneurship companies of the artificial intelligence industry in China are different, the computer vision field has the most entrepreneurship companies, the service robot field is the second field, the third ranking field is the speech and natural language processing field, and the intelligent medical treatment, machine learning, intelligent driving and the like are one of the more popular fields. The computer vision technology is one of the important core technologies of artificial intelligence, can be applied to the fields of security, finance, hardware, marketing, driving, medical treatment and the like, and the computer vision technology level of China reaches the global leading level at present, so that the wide commercialization channel and the technical foundation are the main reasons of becoming the hottest fields.
The artificial intelligence industry chain can be divided into an infrastructure layer, an application technology layer and an industry application layer. Infrastructure layer: the method mainly comprises a basic data provider, a semiconductor chip provider, a sensor provider and a cloud service provider; an application technology layer: mainly comprises a voice recognition, a natural language processing, a computer vision and a deep learning technology provider; an industry application layer: the method mainly integrates artificial intelligence related technology into products and services of the user, and then cuts into a specific scene. At present, the fields of automatic driving, medical treatment, security protection, finance, marketing and the like are the better directions for the general public in the industry.
The intelligent viewing technology appears by means of the climax of full screen and artificial intelligence development of various mobile terminals. The mobile terminal is made into a full screen, and if the scene behind the screen is properly viewed and displayed, the mobile terminal becomes transparent and becomes possible. The view finding display needs to focus and amplify the original shot scenery, and manual focusing and amplifying are not preferable, because manual operation is not accurate, once the person moves, the eyes can move accordingly, the amplified area can be changed, manual operation cannot react, and artificial intelligence relies on the fast reaction speed, accurate operation and can be competent for the work.
Disclosure of Invention
In order to solve the problem that a display target cannot be accurately realized, such as manual amplification, framing and focusing, the invention provides a method and a mobile terminal for intelligent framing display on a screen. The space coordinates of human eyes are collected at any moment, the screen does not need to be adjusted when a person moves, and the view is intelligently looked up; when the frame is narrow enough, the screen can be invisible and can be falsified.
The technical scheme of the invention is to provide a method for intelligently viewing and displaying on a screen, which comprises the following steps:
step 1, determining parameters of a mobile terminal;
determining the length and width of a screen of the mobile terminal, the thickness of the mobile terminal, a wide-angle camera shooting area of a rear wide-angle camera and the azimuth distance between a front depth sensor and the rear wide-angle camera;
step 2, recognizing the human face and obtaining the space coordinates of the target human eyes;
2.1) the front depth sensor collects a three-dimensional image of a human face in front of the front depth sensor;
2.2) analyzing the three-dimensional image of the face collected by the front depth sensor, and identifying the information of the target face and the information of eyes;
2.3) extracting three-dimensional space coordinates of the target human eyes, namely the direction and the distance of the eyes at the front depth sensor according to the target human face information and the eye information; establishing a space coordinate system by taking the screen as an xy reference surface, taking the upper right as a positive direction, taking the front depth sensor as a coordinate origin and taking the front of the screen as a positive direction of a z axis;
step 3, determining a visual field observation area;
modeling by three-dimensional space coordinates of the eyes of a target person, and projecting to the periphery of a screen according to the determined parameters of the mobile terminal, wherein the enclosed area is a visual field observation area;
step 4, intercepting a view observation area in the wide-angle camera shooting area;
in a region where the visual field observation region and the wide-angle shooting region are intersected, intercepting the visual field observation region behind the screen by using an L plane parallel to the xy reference plane, wherein the L plane is defined as a plane where a focus is located;
the visual field observation region extends outwards from the direction of eyes, when the visual field observation region is initially and completely located in the wide-angle shooting region, the distance from the L 'plane to the xy reference plane at the moment is defined as the shortest intelligent viewing distance, the size and the position of the visual field observation region occupying the wide-angle shooting region at the moment are calculated in the L plane outside the shortest intelligent viewing distance, then an image with the same size as the visual field observation region at the moment is intercepted at the position of the L plane and projected on a screen, the L plane is parallel to the L' plane, and the distance between the L plane and the xy reference plane is larger than or equal to the shortest intelligent viewing distance.
Further, the coordinate of the midpoint of the line connecting the two eyes in the step 2.3) is used as the three-dimensional space coordinate of the human eyes.
Further, in order to accurately obtain the target face information, a face recognition method based on the feature face PCA is adopted in the step 2.2) to recognize the target face information.
The invention also provides a mobile terminal for intelligent framing display on a screen, which is characterized in that: comprises a hardware part and a software part;
the hardware part includes: the device comprises a front depth sensor, a screen and a rear wide-angle camera;
the front depth sensor is used for acquiring a three-dimensional image of a human face in front of the front depth sensor;
the software part comprises: the system comprises a face recognition analysis module, an eye coordinate analysis module, a visual field observation area analysis module and a shortest intelligent viewing distance analysis module;
the face recognition analysis module is used for recognizing target face information and eye information by analyzing a face three-dimensional image collected by the front depth sensor;
the eye coordinate analysis module is used for extracting three-dimensional space coordinates of eyes, namely the position and the distance of the eyes at the front depth sensor according to the target face information and the eye information;
the visual field observation area analysis module is used for determining a visual field observation area formed by the eye observation screen according to the three-dimensional space coordinates of the eyes and the parameters of the mobile terminal, such as the position, the length and the width of the screen, the thickness of the mobile terminal, the wide-angle camera area of the rear wide-angle camera and the azimuth distance between the front depth sensor and the rear wide-angle camera, wherein the observation area is not fixed and is changed along with the movement of the eyes;
the shortest intelligent framing distance analysis module is used for judging the shortest intelligent framing distance according to the intersection area of the wide-angle camera shooting area of the rear wide-angle camera and the visual field observation area, and framing distortion effects can be generated when the shortest intelligent framing distance is smaller than the intersection area.
Further, the front depth sensor is a TOF camera.
Compared with the prior art, the invention has the beneficial effects that:
(1) the most natural observation effect.
In a screen with a constantly refreshed captured image, it is felt that objects in the screen will change with the observed position, and it seems that what is seen is a real object and not an image. The most real scene can be seen by human eyes through intelligent display, and the most natural observation effect can be achieved.
(2) No manual adjustment is required.
The front depth sensor of the invention always detects the positions of human eyes, and can accurately view the shot scenery in time when a person moves as long as the CPU processing speed is fast enough and the face recognition mode based on the characteristic face is matched (the calculation speed is fast).
(3) And is more intelligent.
Through face recognition, the screen filters other faces in front of the screen to avoid interference by other faces, so that the scenery which the user should see is correctly displayed on the screen.
Drawings
FIG. 1 is an overall frame diagram of the present invention;
FIG. 2 is a diagram showing the effect of ordinary photography;
FIG. 3 is a diagram illustrating the effect 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 will be described in further detail below with reference to the accompanying drawings and embodiments. The embodiments described herein are only for explaining the technical solution of the present invention and are not limited to the present invention.
The invention provides a method for intelligently viewing and displaying on a screen, which comprises the following steps:
(1) calculating parameters such as the length and the width of a screen, the thickness of a mobile phone, the shooting angle of a rear camera, the azimuth distance between a sensor and the rear camera and the like;
(2) establishing a space coordinate system by taking the screen as an xy reference surface, taking the upper right as a positive direction, taking the front depth sensor as a coordinate origin and taking the front of the screen as a positive direction of a z axis;
(3) as shown in fig. 1, a front sensor (such as a TOF camera) collects a three-dimensional image in front, so long as a human face is in a collection area (area a), the collection can be realized, the human face is identified after the collection, a target human face is found out, and a spatial coordinate of a target human eye is calculated, wherein the coordinate can be replaced by a midpoint of a connecting line of two eyes;
(4) modeling by known human eye space coordinates, projecting to the periphery of a display screen, wherein the enclosed area is the human visual field area; that is, a region c in the figure, which is merged with the wide-angle imaging region (region b), and the wide-angle imaging region is much larger than the visual field observation region, so that the wide-angle imaging region easily includes the entire visual field observation region.
(5) Intercepting a human eye observation area behind the screen by using an L plane parallel to the parallel reference plane; when the wide-angle camera shooting area comprises all the visual field observation areas, the distance from the L 'plane to the xy reference plane at the moment is defined as the shortest intelligent framing distance, wherein the L' plane is parallel to the L plane, the distance of a camera shooting object is not less than the length, the intelligent framing can be carried out by adopting the method, otherwise, distortion occurs, the framing can be carried out at the position of the L plane, and the distance between the L plane and the xy reference plane is more than or equal to the shortest intelligent framing distance. The shortest viewing distance can change along with the movement of human eyes, the farther the human eyes are away from the screen, the closer the shortest intelligent viewing distance is, the larger the inclination angle between the connecting line of the human eyes and the rear camera and the screen is, and the closer the shortest intelligent viewing distance is. In fig. 1, the L plane is at the shortest intelligent viewing distance, and the L' plane coincides with the L plane.
The corresponding mobile terminal includes a hardware part and an algorithm analysis part. The hardware part comprises: the device comprises a front depth sensor, a screen and a rear wide-angle camera; the algorithm analysis part comprises: the system comprises a face recognition analysis module, an eye coordinate analysis module, a visual field observation area analysis module and a shortest intelligent viewing distance analysis module.
The front depth sensor in the embodiment can be a TOF camera or other types of depth sensors and is used for acquiring a three-dimensional image of a human face in front of the front depth sensor; the screen adopts a display which is commonly used for displaying images; the rear wide-angle camera shoots the situation behind the screen. The face recognition analysis module is used for recognizing target face information and eye information by analyzing a face three-dimensional image collected by the front depth sensor; specifically, a face recognition method based on a characteristic face (PCA) can be adopted, wherein the characteristic face is generated and is represented by a group of characteristic vectors; a set of eigenfaces may be obtained by Principal Component Analysis (PCA) over a large set of images depicting different faces. Any one face image can be considered as the combination of the standard faces, and the intelligent framing can only take effect when a person with the collected face data stands in front of a screen, so that the situation that a plurality of faces appear in the same scene and a plurality of data cannot be correctly judged is avoided. In addition, the human face is stored through a series of vectors (each characteristic face is a proportional value) instead of digital images, so that a lot of storage space can be saved, and the operation speed is high. The eye coordinate analysis module extracts three-dimensional space coordinates of eyes, namely the position and the distance of the eyes at the front depth sensor according to the target face information and the eye information. The visual field observation area analysis module determines a visual field observation area formed by the eye observation screen through the three-dimensional space coordinates of the eyes and the parameters of the mobile terminal, such as the position, the length and the width of the screen, the thickness of the mobile terminal, the wide-angle camera area of the rear wide-angle camera, the azimuth distance between the front depth sensor and the rear wide-angle camera. The shortest intelligent framing distance analysis module judges the shortest intelligent framing distance according to the intersection area of the wide-angle shooting area and the visual field observation area of the rear wide-angle camera.
As shown in fig. 2, the image is obtained by a common method, and in this method, due to the wide shooting range and the insufficient screen size, the object to be viewed is displayed in a reduced size, which is not consistent with the size of the object viewed by human eyes, and the visual viewing effect is not good. As shown in FIG. 3, in order to adopt the intelligent view-finding display effect diagram of the present invention, the size of the shot scenery is combined with the effect that the human eyes observe the size of the scenery, the view-finding amplification is carried out, the view-finding position can be changed along with the movement of the human, and the human eyes can intelligently display the truest scenery to achieve the most natural observation effect.
Claims (5)
1. A method for intelligent on-screen viewfinder display, comprising the steps of:
step 1, determining parameters of a mobile terminal;
determining the length and width of a screen of the mobile terminal, the thickness of the mobile terminal, a wide-angle camera shooting area of a rear wide-angle camera and the azimuth distance between a front depth sensor and the rear wide-angle camera;
step 2, recognizing the human face and obtaining the space coordinates of the target human eyes;
2.1) the front depth sensor collects a three-dimensional image of a human face in front of the front depth sensor;
2.2) analyzing the three-dimensional image of the face collected by the front depth sensor, and identifying the information of the target face and the information of eyes;
2.3) extracting three-dimensional space coordinates of the target human eyes, namely the direction and the distance of the eyes at the front depth sensor according to the target human face information and the eye information; establishing a space coordinate system by taking the screen as an xy reference surface, taking the upper right as a positive direction, taking the front depth sensor as a coordinate origin and taking the front of the screen as a positive direction of a z axis;
step 3, determining a visual field observation area;
modeling by three-dimensional space coordinates of the eyes of a target person, and projecting to the periphery of a screen according to the determined parameters of the mobile terminal, wherein the enclosed area is a visual field observation area;
step 4, intercepting a view observation area in the wide-angle camera shooting area;
in a region where the visual field observation region and the wide-angle shooting region are intersected, intercepting the visual field observation region behind the screen by using an L plane parallel to the xy reference plane, wherein the L plane is defined as a plane where a focus is located;
the visual field observation region extends outwards from the direction of eyes, when the visual field observation region is initially and completely located in the wide-angle shooting region, the distance from an L' plane parallel to an L plane to an xy reference plane at the moment is defined as the shortest intelligent viewing distance, the size and the position of the visual field observation region occupying the wide-angle shooting region at the moment are calculated in the L plane outside the shortest intelligent viewing distance, then an image with the same size as the visual field observation region at the moment is intercepted at the position of the L plane and projected on a screen, and the distance between the L plane and the xy reference plane is larger than or equal to the shortest intelligent viewing distance.
2. The method for on-screen smart viewfinder display of claim 1, wherein: and 2.3) taking the coordinate of the midpoint of the line connecting the two eyes as the three-dimensional space coordinate of the human eyes.
3. The method for on-screen smart viewfinder display of claim 1, wherein: and 2.2) adopting a face recognition method based on feature face PCA to recognize the target face information.
4. The utility model provides a mobile terminal that is used for intelligent framing to show on screen which characterized in that: comprises a hardware part and a software part;
the hardware part includes: the device comprises a front depth sensor, a screen and a rear wide-angle camera;
the front depth sensor is used for acquiring a three-dimensional image of a human face in front of the front depth sensor;
the software part comprises: the system comprises a face recognition analysis module, an eye coordinate analysis module, a visual field observation area analysis module and a shortest intelligent viewing distance analysis module;
the face recognition analysis module is used for recognizing target face information and eye information by analyzing a face three-dimensional image collected by the front depth sensor;
the eye coordinate analysis module is used for extracting three-dimensional space coordinates of eyes, namely the position and the distance of the eyes at the front depth sensor according to the target face information and the eye information;
the visual field observation area analysis module is used for determining a visual field observation area formed by an eye observation screen according to the three-dimensional space coordinate of the eyes and the parameters of the mobile terminal;
the shortest intelligent framing distance analysis module is used for judging the shortest intelligent framing distance according to the intersection area of the wide-angle camera shooting area of the rear wide-angle camera and the visual field observation area.
5. The mobile terminal for on-screen smart viewfinder display of claim 4, wherein: the front depth sensor is a TOF camera.
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Cited By (2)
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| CN112052827A (en) * | 2020-09-21 | 2020-12-08 | 陕西科技大学 | Screen hiding method based on artificial intelligence technology |
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