CN111669505A - Camera starting method and device - Google Patents
Camera starting method and device Download PDFInfo
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- CN111669505A CN111669505A CN202010618718.2A CN202010618718A CN111669505A CN 111669505 A CN111669505 A CN 111669505A CN 202010618718 A CN202010618718 A CN 202010618718A CN 111669505 A CN111669505 A CN 111669505A
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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
- 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
- H04N23/62—Control of parameters via user interfaces
Abstract
The embodiment of the application provides a camera starting method and a device, wherein the method comprises the following steps: receiving an input of a user to start a camera; acquiring a target image by a first camera in response to the input; under the condition that the target image comprises a face area, if the proportion of the face area in the target image meets a first preset condition, taking a second camera as a target camera device; and if the proportion meets a second preset condition, taking the first camera as a target camera device. According to the embodiment of the application, the user can quickly start the target camera device which is required to be used for shooting, so that quick shooting is realized.
Description
Technical Field
The present application relates to the field of terminal technologies, and in particular, to a method and an apparatus for starting a camera.
Background
At present, when taking a picture, a camera needs to be started first, and then the camera mode is confirmed to be a front mode or a rear mode. However, the default of the mode after the camera is started up is the mode when the camera is turned off last time, that is, the camera is turned off in the front mode, the display mode is the front mode when the camera is restarted, the camera is turned off in the rear mode, and the display mode is still the rear mode when the camera is restarted. At this time, if the user wants to fast self-shoot, but the default mode is the rear mode after the camera is started, the user needs to manually switch to the front mode to carry out self-shoot; if the user wants to shoot the scenery before the eyes through the rear camera, but the default mode is the front mode after the camera is started, the user needs to manually switch to the rear mode for shooting. Therefore, the problem that the front camera or the rear camera needs to be manually selected when the camera is started exists in the prior art.
Disclosure of Invention
The embodiment of the application provides a camera starting method and device, and aims to solve the problem that a front camera or a rear camera needs to be manually selected when a camera is started in the related art.
In a first aspect, an embodiment of the present application provides a camera starting method, including:
receiving an input of a user to start a camera;
acquiring a target image by a first camera in response to the input;
under the condition that the target image comprises a face area, if the proportion of the face area in the target image meets a first preset condition, taking a second camera as a target camera device;
and if the proportion meets a second preset condition, taking the first camera as a target camera device.
In a second aspect, an embodiment of the present application provides a camera starting device, including:
the receiving module is used for receiving input of starting the camera by a user;
the acquisition module is used for responding to the input and acquiring a target image through the first camera;
the first determining module is used for taking a second camera as a target camera device if the proportion of the face area in the target image meets a first preset condition under the condition that the target image comprises the face area;
and the second determining module is used for taking the first camera as a target camera device if the ratio meets a second preset condition.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the camera starting method when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the camera booting method.
In a fifth aspect, the present application provides a chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the method according to the first aspect.
In this embodiment, a target image is acquired by a first camera, and if a face area is included in the target image, if an occupation ratio of the face area in the target image satisfies a first preset condition, a second camera is used as a target camera, and if the occupation ratio satisfies a second preset condition, the first camera is used as the target camera, so that compared with the prior art, a user can autonomously determine whether the started target camera is the first camera or the second camera by adjusting the occupation ratio of the face area of a person to be photographed in the target image, thereby solving the problem that the prior camera needs to manually select a front camera or a rear camera when being started, but cannot automatically select the front camera or the rear camera to be started according to the user requirements, and realizing that the user can conveniently and rapidly start a corresponding camera mode when starting the camera for photographing, the fussy camera switching process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for starting a camera according to an embodiment of the present invention;
FIG. 2 is a schematic overall flowchart of a camera booting method according to an embodiment of the present application;
fig. 3 is a schematic interface diagram when the screen mode of the terminal in the embodiment of the present application is the landscape mode;
fig. 4 is a schematic interface diagram when the screen mode of the terminal in the embodiment of the present application is the vertical screen mode;
FIG. 5 is a block diagram of a camera booting device according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 7 is a second schematic structural diagram of an electronic device in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present application, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
As shown in fig. 1, which is a flowchart illustrating steps of a camera booting method according to an embodiment of the present application, the method includes the following steps:
step 101: an input is received that a user activates a camera.
When the user wants to shoot through the terminal, the user can input an operation of starting the camera, for example, a camera control in the terminal can be clicked to start the camera. At this time, the terminal receives an input of a user to start the camera, for example, a click input of the camera program application icon by the user.
Step 102: in response to the input, a target image is captured by the first camera.
Specifically, the terminal may perform shooting by recognizing an object through the first camera, for example, perform face recognition through the first camera to unlock a terminal screen.
In this step, the terminal acquires the target image through the first camera in response to the user's input to start the camera. That is, the terminal receives an input of a user to start the camera, and the first camera is in a shooting state in the process of inputting the input to the camera determination target shooting device.
Specifically, the first camera may be a front camera.
It should be noted that the target image may be any image acquired by the first camera, and the target image is not specifically limited herein.
Step 103: and under the condition that the target image comprises the face area, if the proportion of the face area in the target image meets a first preset condition, taking the second camera as a target camera device.
Specifically, since a user often requires the proportion of a subject in a screen when shooting with a person as a target, when the target image includes a face region, the target image capturing device can be determined using the proportion of the face region in the target image as a determination condition, so that the target image capturing device determined according to the proportion can be matched with the image capturing device required by the user.
In this step, specifically, when the target image includes the face region, it may be determined whether an occupation ratio of the face region in the target image satisfies a first preset condition, and when the occupation ratio of the face region in the target image satisfies the first preset condition, the second camera is used as the target camera. In this way, when the occupancy ratio satisfies the first preset condition, the user is considered to be not wanting to use the first camera as the target imaging device at this time, and then starts the second camera to perform the shooting operation.
In this way, the terminal determines whether to use the second camera as the target camera device by judging whether the occupation ratio of the face area in the target image meets the first preset condition, so that when a user needs to use the second camera as the target camera device, the occupation ratio of the face area of a person to be shot (which can be the user or a group including the user) in the target image can be adjusted, and the occupation ratio is adjusted to meet the first preset condition, thereby achieving the purpose that the terminal uses the second camera as the target camera device. This has avoided the user in prior art to still need the manual switch to the problem of second camera mode when the mode is first camera mode after needing to shoot as target camera device with the second camera and the camera starts for the camera mode that can make things convenient for quick start correspondence has reduced loaded down with trivial details camera switching operation.
It should be noted that after the second camera is taken as the target image pickup device, the second camera can be used for taking a picture.
Specifically, the second camera may be a rear camera.
Step 104: and if the percentage meets a second preset condition, taking the first camera as a target camera device.
In this step, specifically, when the target image includes the face region, it may be determined whether an occupation ratio of the face region in the target image satisfies a second preset condition, and when the occupation ratio of the face region in the target image satisfies the second preset condition, the first camera is used as the target camera. Therefore, when the occupation ratio meets the second preset condition, the target image acquired by the first camera is considered to meet the shooting composition requirement of the user, namely the user wants to shoot through the first camera, and therefore the first camera is used as the target camera device, and the user can conveniently operate the target camera device.
In this way, the terminal determines whether to use the first camera as the target camera device by judging whether the occupation ratio of the face area in the target image meets the second preset condition, so that when a user needs to use the first camera as the target camera device, the occupation ratio of the face area of a person to be shot (which can be the user or a group including the user) in the target image can be adjusted, and the occupation ratio is adjusted to meet the second preset condition, thereby achieving the purpose that the terminal uses the first camera as the target camera device. This has avoided user's in prior art when needing to shoot as target camera device with first camera and the mode is the second camera mode after the camera starts, still need the problem of manual switch to first camera mode for the camera mode that the start-up that can make things convenient for fast corresponds has reduced loaded down with trivial details camera switching operation.
It should be noted that after the first camera is taken as the target image pickup device, the first camera can be used for taking a picture.
In this embodiment, when the acquired target image includes a face region, if the proportion of the face region in the target image meets a first preset condition, the second camera is used as a target camera device; if the occupation ratio meets the second preset condition, the first camera is used as the target camera device, so that the user can independently determine whether the started target camera device is the first camera or the second camera by adjusting the occupation ratio condition of the human face area of the shot person in the target image, the corresponding camera mode can be conveniently and quickly started, the complex camera switching operation is reduced, and the quick and convenient shooting requirement of the user is met.
Further, in this embodiment, if the ratio of the face area in the target image satisfies the first preset condition, when the second camera is taken as the target image capturing device, any one of the following items may be included:
first, when the number of faces included in the target image is 1, if the occupation ratio of the face area in the target image is greater than a first proportional threshold, the second camera is used as the target imaging device.
Specifically, the second camera may be a rear camera.
That is, if the number of detected faces is 1, the proportion of the face area in the target image is calculated, and if the proportion of the face area in the target image is greater than the first proportional threshold, the size of the face is not suitable for showing a good self-photographing effect, that is, the user looks more like a landscape in the picture. Therefore, in order to reduce the operation of switching between the front and rear modes after the user starts the camera and to capture an ideal picture, the second camera can be directly used as the target camera and the second camera is used for shooting, so that the user can quickly start the target camera which is wanted to be used for shooting, and the quick shooting requirement of the user is met.
In this case, the terminal needs to recognize the face images from the target image by using a face recognition technology, and then determines the number of the face images. The face recognition technology is based on the face features of people, firstly, whether a face exists in an image is judged, and if the face exists, the position and the size of each face and the position information of each main facial organ are further given.
In addition, face recognition techniques include, but are not limited to, reference template methods and face rule methods. The reference template method comprises the steps of firstly designing one or more standard face templates, then calculating the matching degree between a sample collected by testing and the standard templates, and judging whether a face exists or not through a threshold value; in the face rule method, because a face has certain structural distribution characteristics, the face rule method extracts the characteristics to generate corresponding rules so as to judge whether a test sample contains the face.
It should be noted that the size of the first scale threshold may be set according to actual requirements, for example, the first scale threshold may be 1/3 in the case of horizontal screen display, and the first scale threshold may be 1/2 in the case of vertical screen display, which is not limited herein.
And secondly, under the condition that the number of the human faces in the target image is greater than 1, if the proportion of the human face area in the target image is greater than a second proportion threshold value, taking the second camera as a target camera device.
That is to say, if the number of detected faces included in the target image is greater than 1, the proportion of the total face area of the plurality of faces in the target image is calculated, and if the proportion of the face area in the target image is greater than a second proportion threshold, the size of the face is not suitable for showing a good self-photographing effect, that is, the user may look more at scenery in the picture in terms of subjective behavior.
In this case, the terminal also needs to recognize the face images from the target image by using the face recognition technology, and then determines the number of the face images. The specific content of the face recognition technology may refer to the above-mentioned related content, and is not described herein again.
And thirdly, under the condition that the number of the faces included in the target image is greater than 1, if the proportion of the face area in the target image is within the range of a third proportion threshold value and a second proportion threshold value, and the ratio of the maximum face to the minimum face in the face area is greater than a preset multiple, taking the second camera as a target camera device.
That is to say, if the number of faces in the target image is detected to be greater than 1, the total proportion of the faces in the target image is calculated, and at this time, if the proportion of the face area in the target image is within the range of the third proportion threshold and the second proportion threshold, and the ratio of the maximum face to the minimum face in the face area is greater than a preset multiple, the proportion between the faces is not suitable for showing a good self-photographing effect, that is, the user can look more scenery in the picture.
In addition, it should be noted that the second ratio threshold is greater than the third ratio threshold, and the sizes of the second ratio threshold and the third ratio threshold may be set according to actual requirements. For example, in the case of a landscape display, the second scale threshold may be 1/2, and the third scale threshold may be 1/3; in the case of the portrait screen display, the second scale threshold may be 2/3, and the third scale threshold may be 1/2, which is not limited herein.
The preset multiple may be 2, but is not limited thereto.
Therefore, the second camera is determined to be used as the target camera device through any one of the modes, whether the second camera is used as the target camera device is determined according to the proportion condition of the face area in the target image is achieved, a user can adjust the relation between the proportion of a shot person in the target image and the proportion threshold value in each mode, the purpose that the second camera is directly adopted for shooting when the camera is started is achieved, and the requirement of the user for quick shooting is met.
Furthermore, in this embodiment, if the percentage satisfies the second preset condition, when the first camera is taken as the target imaging device, any one of the following items may be included:
first, when the number of faces included in the target image is 1, if the proportion of the face area in the target image is not greater than a first proportional threshold, the first camera is used as a target camera device.
Specifically, the first camera is a front camera.
That is to say, if the number of detected faces in the target image is 1, the occupation ratio of the face area of the face in the target image is calculated, and if the occupation ratio of the face area in the target image is not greater than the first proportional threshold, at this time, the user may want to show himself and the surrounding environment at the same time in subjective behavior, so as to reduce the operation of switching between the front and rear modes after the user starts the camera, and in order to capture an ideal photo, the first camera, that is, the front camera, may be directly used as the target camera apparatus, and capture the photo through the first camera, thereby satisfying the user's demand for quick self-photographing.
It should be noted that, in this case, the terminal also needs to recognize the face from the target image by the face recognition technology, and then determines the number of faces. The specific content of the face recognition technology may refer to the above-mentioned related content, and is not described herein again.
And secondly, under the condition that the number of the faces included in the target image is greater than 1, if the proportion of the face area in the target image is within the range of a third proportion threshold value and a second proportion threshold value, and the ratio of the maximum face to the minimum face in the face area is not greater than a preset multiple, taking the first camera as a target camera device.
That is to say, if the number of faces in the target image is detected to be greater than 1, the proportion of the total face area of the faces in the target image is calculated, and if the proportion of the face area in the target image is within the range of the third proportion threshold and the second proportion threshold, and the ratio of the maximum face to the minimum face in the face area is not greater than the preset multiple, at this time, the user is more inclined to show the self-photographing effect and the periodic environment in terms of subjective behavior.
Therefore, the first camera is determined to be used as the target camera device through any one of the modes, whether the first camera is used as the target camera device is determined according to the proportion condition of the face area in the target image is achieved, a user can adjust the relation between the proportion of a shot person in the target image and the proportion threshold values of the shot person in the respective modes, the purpose that the first camera is directly adopted for self-shooting when the camera is started is achieved, and the requirement of the user for quick self-shooting is met.
Of course, it should be noted that, when the target image does not include the face region, the second camera, i.e., the rear camera, may be directly used as the target image capturing device. In other words, when the target image does not include the face area, the general user focuses on the scenery in the screen and does not intend to express the scenery in the screen, so that the second camera can be directly used as the target camera device to shoot through the second camera in order to reduce the operation of switching between front and back when the user starts the camera, and the requirement of the user on quick shooting is met.
Furthermore, in addition to the above embodiment, if the occupation ratio of the face area in the target image satisfies the first preset condition, when the second camera is taken as the target image capturing device, any one of the following items may be further included:
firstly, under the condition of vertical screen display, if the proportion of the face area in the target image is greater than a fourth proportion threshold value, the second camera is used as a target camera device.
Specifically, the terminal can recognize the current screen orientation through gravity sensing. Because the picture proportions in the horizontal screen display and the vertical screen display are different, the proportion threshold values of different face areas in the target image can be set based on different screen display conditions.
At this time, in the case of the vertical screen display, if the occupation ratio of the face area in the target image is greater than the fourth ratio threshold, the second camera is used as the target camera device, and shooting is performed through the second camera. Therefore, the user can control whether the second camera is used as the target camera device or not through the holding direction of the control terminal and the occupation condition of the face area of the shot person in the target image, so that the corresponding camera mode can be started conveniently and quickly, and the quick and convenient shooting requirement of the user is met.
And secondly, under the condition of horizontal screen display, if the occupation ratio of the human face area in the target image is greater than a fifth proportion threshold value, taking the second camera as a target camera device.
That is, in the case of the landscape display, when the occupation ratio of the face area in the target image is greater than the fifth ratio threshold, the second camera is directly used as the target image pickup device, and the second camera is used for shooting. Therefore, the user can control whether the second camera is used as the target camera device or not through the holding direction of the control terminal and the occupation condition of the face area of the shot person in the target image, so that the corresponding camera mode can be started conveniently and quickly, and the quick and convenient shooting requirement of the user is met.
In addition, specifically, since the same face area occupies a different proportion of the entire screen interface when displayed in the vertical screen from the whole screen interface when displayed in the horizontal screen, the proportion threshold of the face area when displayed in the vertical screen is different from the proportion threshold of the face area when displayed in the horizontal screen, for example, the fourth proportion threshold is different from the fifth proportion threshold.
Optionally, the fourth scaling threshold is greater than the fifth scaling threshold. Because the proportion of the same face area in the whole screen interface is larger than that in the whole screen interface in the vertical screen display, the fourth proportion threshold value can be set to be larger than the fifth proportion threshold value so as to ensure the reasonability of the set proportion threshold value. Therefore, the camera which the user wants to start can be used as the target camera device to the maximum degree no matter in the vertical screen state or the horizontal screen state.
It should be noted that, in the case that the number of faces is 1, the fourth proportion threshold may be 1/2, and the fifth proportion threshold is 1/3; in the case that the number of faces is greater than 1, the fourth proportion threshold may be 2/3, and the fifth proportion threshold is 1/2; of course, the numerical values of the fourth proportional threshold and the fifth proportional threshold are not specifically limited herein.
Therefore, the display direction of the terminal is distinguished, namely, the terminal is displayed in a horizontal screen mode or a vertical screen mode, and the proportion threshold value in different display directions is set, so that different display directions correspond to different proportion threshold values, a user can adjust the display direction of the terminal and the relation between the proportion of the face area in the target image and the proportion threshold value, whether the second camera is used as the target camera is autonomously determined, the terminal display direction is increased to be the determination basis of the target camera based on the embodiment, the conformity degree between the determined target camera and the target camera required by the user is further increased, and the rapid shooting requirement of the user is met.
Specifically, in addition to the above embodiment, when the occupation ratio satisfies the second preset condition, when the first camera is taken as the target imaging device, any one of the following items may be included:
firstly, under the condition of vertical screen display, if the proportion of the face area in the target image is not greater than a fourth proportion threshold value, the first camera is used as a target camera device.
At this time, under the condition of vertical screen display, if the proportion of the face area in the target image is not greater than the fourth proportion threshold, the first camera is used as the target camera device, and shooting is performed through the first camera. Therefore, the user can control whether the first camera is used as the target camera device or not through the holding direction of the control terminal and the occupation condition of the face area of the shot person in the target image, so that the corresponding camera mode can be started conveniently and quickly, and the quick and convenient shooting requirement of the user is met.
And secondly, under the condition of horizontal screen display, if the proportion of the human face area in the target image is not greater than a fifth proportion threshold value, taking the first camera as a target camera device.
That is, in the case of the landscape display, when the occupation ratio of the face area in the target image is not greater than the fifth proportion threshold, the first camera is directly used as the target image pickup device, and shooting is performed by the first camera. Therefore, the user can control whether the first camera is used as the target camera device or not through the holding direction of the control terminal and the occupation condition of the face area of the shot person in the target image, so that the corresponding camera mode can be started conveniently and quickly, and the quick and convenient shooting requirement of the user is met.
Therefore, the user can autonomously determine whether to take the first camera as the target camera device by adjusting the display orientation of the terminal and the relation between the proportion of the face area in the target image and the proportion threshold value, and the terminal display orientation is increased to be the basis for determining the target camera device based on the embodiment, so that the conformity between the determined target camera device and the target camera device required by the user is further increased, and the requirement of the user on quick self-shooting is met.
The overall process of the present embodiment is described below by means of a specific flow.
As shown in fig. 2, the camera startup process includes the following steps:
firstly, when a user clicks a camera control of a terminal to enter a camera application, namely when the terminal receives an input of starting a camera by the user, outputting orientation information of the terminal according to a gravity sensor, namely whether the output terminal is in a vertical screen display mode or a horizontal screen display mode.
Then, the orientation and the content captured by the first camera (i.e. the front camera) are displayed through the screen of the terminal, and the corresponding first camera or second camera (i.e. the rear camera) is started, i.e. the corresponding front mode or rear mode is started.
Specifically, as shown in fig. 3, the terminal is in a horizontal screen display mode, and at this time, a target image captured by the front camera is acquired at the same time; at this time:
if the target image does not include a face area, that is, if the number of detected faces is 0, then a general user focuses on the scenery in the picture without intending on the expression of the general user in the picture, and in order to reduce the operation of switching the front-back mode by the user and to enable the user to capture an ideal picture, the rear-camera is directly used as the target camera to be started, that is, the rear-back mode is started.
If the number of faces included in the target image is 1, calculating the proportion of the face area in the target image, and if the proportion of the face area is greater than a first proportional threshold (because a front-mounted self-photographing user in a landscape display mode is more prone to simultaneously display the user and the surrounding environment, the first proportional threshold can be set to 1/3), at this moment, the size of the face is not suitable for displaying a good self-photographing effect, the user can view more scenery in the picture in subjective behavior, and in order to reduce the operation that the user switches front and back positions and snap an ideal picture, the rear-mounted camera is directly used as a target camera device and started, namely, the rear-mounted mode is started; if the proportion of the human face area in the target image is not more than 1/3, which is a normal self-shooting mode of the user in the state, the front-facing camera is directly used as the target camera device and started, namely, the front-facing mode is started.
If the number of faces included in the target image is greater than 1, calculating the total proportion of the face areas of the multiple faces in the target image, and if the proportion of the face areas in the target image is greater than a second proportion threshold (because of the front self-shooting of the cross screen mode, a user tends to show the user and the surrounding environment at the same time, the second proportion threshold can be set to 1/2), at this moment, the size of the face is not suitable for showing a good self-shooting group photo effect, the user can take more scenery in the picture in subjective behaviors, and in order to reduce the operation of switching the front and the back of the user and snap an ideal photo, the rear camera is directly taken as a target camera device and started, namely, the rear mode is started; of course, if the proportion of the face area in the target image is between the third proportional threshold (e.g., 1/3) and the second proportional threshold, e.g., the [1/3,1/2], and the difference between the maximum face and the minimum face is greater than a preset multiple (e.g., 2 times), at this time, the proportion between the faces is not suitable for exhibiting a good self-photographing effect, the user may be more interested in the scenery within the picture in subjective behavior, and in order to reduce the operations of the user switching between the front and rear positions and to capture an ideal picture, the rear camera is directly used as the target camera and started, i.e., the rear mode is started; on the contrary, if the ratio of the face area in the target image is within the [1/3,1/2] interval and the difference between the maximum face and the minimum face is less than 2 times, the first camera is directly used as the target camera and started, i.e. the front-end mode is started.
As shown in fig. 4, the terminal is in a vertical screen display mode, and at this time, a target image captured by the front camera is acquired at the same time; at this time:
if the target image does not include the face area, that is, the number of detected faces is 0, then a general user focuses on the landscape in the picture without intending on the expression of the user in the picture, and in order to reduce the operation of switching the front-back mode by the user and to enable the user to capture an ideal picture, the rear-camera is directly used as the target camera and started, that is, the rear-back mode is started.
If the number of faces included in the target image is 1, that is, the number of detected faces is 1, calculating the proportion of the face area in the target image, and if the proportion of the face area in the target image is greater than a first proportional threshold (since a user tends to display himself/herself by front-end self-portrait in the portrait screen display mode, the first proportional threshold may be set to 1/2), at this time, the size of the face is not suitable for displaying a good self-portrait effect, and the user may view more scenery in the image in subjective behavior, then in order to reduce the user's operations of switching front and rear positions and capturing an ideal picture, the rear camera is directly used as a target camera device and started, that is, the rear mode is started; if the proportion of the human face area in the target image is not more than 1/2, which is a normal self-shooting mode of the user in the state, the front-facing camera is directly used as the target camera device and started, namely, the front-facing mode is started.
If the number of faces included in the target image is greater than 1, that is, the number of detected faces is greater than 1, calculating the proportion of a total face area of the faces in the target image, and if the proportion of the face area in the target image is greater than a second proportion threshold (because of the front self-portrait in the vertical screen display mode, a user tends to show himself at the same time, the second proportion threshold can be set to 2/3), at this time, the size of the face is not suitable for showing a good self-portrait effect, the user can focus more scenery in the picture in subjective behavior, and in order to reduce the operation of switching the front and rear positions of the user and capture an ideal picture, the rear camera is directly used as a target camera device and started, that is, the rear position mode is started; of course, if the proportion of the face area in the target image is between the third proportional threshold (e.g., 1/2) and the second proportional threshold, e.g., the [1/2,2/3], and the difference between the maximum face and the minimum face is greater than a preset multiple (e.g., 2 times), at this time, the proportion between the faces is not suitable for exhibiting a good self-timer image-taking effect, the user may be more interested in the scenery in the picture in subjective behavior, and in order to reduce the operations of the user switching between front and rear positions and to capture an ideal picture, the rear camera is directly used as the target image capturing device and started, i.e., the rear mode is started; on the contrary, if the ratio of the face area in the target image is within the [1/2,2/3] interval and the difference between the maximum face and the minimum face is less than 2 times, the front camera is taken as the target camera and is started, i.e. the front mode is started.
Like this, this embodiment makes the user can come the first camera or the second camera of the target camera device that the decision was started independently through the proportion condition of adjustment by shooter's face area in the target image for the camera mode that the start-up that can be convenient quick corresponds has reduced loaded down with trivial details camera switching operation, has satisfied user's quick convenient shooting demand.
In addition, as shown in fig. 5, a block diagram of a camera booting apparatus in an embodiment of the present application is shown, where the apparatus includes:
a receiving module 501, configured to receive an input that a user starts a camera;
an acquisition module 502 for acquiring a target image through a first camera in response to the input;
a first determining module 503, configured to, when the target image includes a face region, if a proportion of the face region in the target image meets a first preset condition, use a second camera as a target camera;
a second determining module 504, configured to take the first camera as a target camera if the ratio meets a second preset condition.
Optionally, the first determining module 503 includes any unit of:
a first determining unit, configured to, when the number of faces included in the target image is 1, take the second camera as a target camera if a ratio of the face area in the target image is greater than a first proportional threshold;
a second determining unit, configured to, when the number of faces included in the target image is greater than 1, take the second camera as a target camera if a proportion of the face area in the target image is greater than a second proportion threshold;
a third determining unit, configured to, when the number of faces included in the target image is greater than 1, if a ratio of the face area in the target image is within a range of a third ratio threshold and the second ratio threshold, and a ratio of a maximum face to a minimum face in the face area is greater than a preset multiple, use the second camera as a target camera;
the second camera is a rear camera, and the second proportion threshold is larger than the third proportion threshold.
Optionally, the second determining module 504 includes any of the following units:
a fourth determining unit, configured to, when the number of faces included in the target image is 1, take the first camera as a target camera if a ratio of the face area in the target image is not greater than the first ratio threshold;
a fifth determining unit, configured to, when the number of faces included in the target image is greater than 1, if a ratio of the face area in the target image is within a range between the third ratio threshold and the second ratio threshold, and a ratio of a maximum face to a minimum face in the face area is not greater than the preset multiple, use the first camera as a target camera;
the first camera is a front camera.
Optionally, the first determining module 503 includes:
a sixth determining unit, configured to, in a case of displaying a vertical screen, if a proportion of the face area in the target image is greater than a fourth proportion threshold, use the second camera as a target image capture device;
a seventh determining unit, configured to, in a case of a landscape display, if a proportion of the face area in the target image is greater than a fifth proportion threshold, use the second camera as a target image capture device;
wherein the fourth scaling threshold is greater than the fifth scaling threshold.
Optionally, the second determining module 504 includes:
an eighth determining unit, configured to, in a case of displaying a vertical screen, if a proportion of the face area in the target image is not greater than the fourth proportion threshold, use the first camera as a target camera device;
and a ninth determining unit, configured to, in a case of a landscape display, if a proportion of the face area in the target image is not greater than the fifth proportion threshold, use the first camera as a target imaging device.
The apparatus provided in this embodiment can implement all the method steps of the above method embodiments and achieve the same technical effects, and will not be described herein again.
Optionally, as shown in fig. 6, an electronic device 600 is further provided in this embodiment of the present application, and includes a processor 601, a memory 602, and a program or an instruction stored in the memory 602 and executable on the processor 601, where the program or the instruction is executed by the processor 601 to implement each process of the above-mentioned camera startup method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be noted that the electronic devices in the embodiments of the present application include mobile electronic devices and non-mobile electronic devices.
Fig. 7 is a hardware schematic diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 7, the electronic device 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, and the like.
Those skilled in the art will appreciate that the electronic device 700 may also include a power supply (e.g., a battery) for powering the various components, and the power supply may be logically coupled to the processor 710 via a power management system, such that the functions of managing charging, discharging, and power consumption may be performed via the power management system. The electronic device structure shown in fig. 7 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
Wherein the user input unit 707 is configured to receive an input of a user to start the camera; processor 710 is configured to capture a target image via the first camera in response to the input; under the condition that the target image comprises a face area, if the proportion of the face area in the target image meets a first preset condition, taking a second camera as a target camera device; and if the proportion meets a second preset condition, taking the first camera as a target camera device.
It should be noted that, in this embodiment, the electronic device 700 may implement each process in the method embodiment in this embodiment and achieve the same beneficial effects, and for avoiding repetition, details are not described here.
It should be understood that in the embodiment of the present application, the input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the graphics processing Unit 7041 processes image data of still pictures or videos obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts of a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein. Memory 709 may be used to store software programs as well as various data, including but not limited to applications and operating systems. Processor 710 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned camera starting method embodiment or each process of the information receiving method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the information sending method embodiment or each process of the information receiving method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A camera startup method, comprising:
receiving an input of a user to start a camera;
acquiring a target image by a first camera in response to the input;
under the condition that the target image comprises a face area, if the proportion of the face area in the target image meets a first preset condition, taking a second camera as a target camera device;
and if the proportion meets a second preset condition, taking the first camera as a target camera device.
2. The method for starting up a camera according to claim 1, wherein if the proportion of the face area in the target image satisfies a first preset condition, taking a second camera as a target image capturing device includes any one of:
under the condition that the number of faces included in the target image is 1, if the proportion of the face area in the target image is greater than a first proportional threshold, taking the second camera as a target camera device;
under the condition that the number of faces included in the target image is greater than 1, if the proportion of the face area in the target image is greater than a second proportion threshold value, taking the second camera as a target camera device;
under the condition that the number of the faces in the target image is greater than 1, if the proportion of the face area in the target image is within the range of a third proportion threshold and the second proportion threshold, and the ratio of the maximum face to the minimum face in the face area is greater than a preset multiple, taking the second camera as a target camera device;
the second camera is a rear camera, and the second proportion threshold is larger than the third proportion threshold.
3. The method for starting up a camera according to claim 2, wherein if the percentage satisfies a second preset condition, taking the first camera as a target image capturing device includes:
under the condition that the number of faces included in the target image is 1, if the proportion of the face area in the target image is not larger than the first proportional threshold, taking the first camera as a target camera device;
under the condition that the number of the faces included in the target image is greater than 1, if the proportion of the face area in the target image is within the range of the third proportion threshold and the second proportion threshold, and the ratio of the maximum face to the minimum face in the face area is not greater than the preset multiple, taking the first camera as a target camera device;
the first camera is a front camera.
4. The method according to any one of claims 1 to 3, wherein if the proportion of the face area in the target image satisfies a first preset condition, taking a second camera as a target image capturing device includes:
under the condition of vertical screen display, if the proportion of the face area in the target image is greater than a fourth proportion threshold value, taking the second camera as a target camera device;
under the condition of horizontal screen display, if the proportion of the face area in the target image is larger than a fifth proportion threshold value, taking the second camera as a target camera device;
wherein the fourth scaling threshold is greater than the fifth scaling threshold.
5. The method for starting up a camera according to claim 4, wherein if the percentage satisfies a second preset condition, taking the first camera as a target camera device includes:
under the condition of vertical screen display, if the proportion of the face area in the target image is not greater than the fourth proportion threshold, taking the first camera as a target camera device;
and under the condition of horizontal screen display, if the proportion of the face area in the target image is not greater than the fifth proportion threshold value, taking the first camera as a target camera device.
6. A camera startup device, comprising:
the receiving module is used for receiving input of starting the camera by a user;
the acquisition module is used for responding to the input and acquiring a target image through the first camera;
the first determining module is used for taking a second camera as a target camera device if the proportion of the face area in the target image meets a first preset condition under the condition that the target image comprises the face area;
and the second determining module is used for taking the first camera as a target camera device if the ratio meets a second preset condition.
7. The camera activation apparatus according to claim 6, wherein the first determination module includes any of:
a first determining unit, configured to, when the number of faces included in the target image is 1, take the second camera as a target camera if a ratio of the face area in the target image is greater than a first proportional threshold;
a second determining unit, configured to, when the number of faces included in the target image is greater than 1, take the second camera as a target camera if a proportion of the face area in the target image is greater than a second proportion threshold;
a third determining unit, configured to, when the number of faces included in the target image is greater than 1, if a ratio of the face area in the target image is within a range of a third ratio threshold and the second ratio threshold, and a ratio of a maximum face to a minimum face in the face area is greater than a preset multiple, use the second camera as a target camera;
the second camera is a rear camera, and the second proportion threshold is larger than the third proportion threshold.
8. The camera activation apparatus according to claim 7, wherein the second determination module includes any of:
a fourth determining unit, configured to, when the number of faces included in the target image is 1, take the first camera as a target camera if a ratio of the face area in the target image is not greater than the first ratio threshold;
a fifth determining unit, configured to, when the number of faces included in the target image is greater than 1, if a ratio of the face area in the target image is within a range between the third ratio threshold and the second ratio threshold, and a ratio of a maximum face to a minimum face in the face area is not greater than the preset multiple, use the first camera as a target camera;
the first camera is a front camera.
9. The camera activation apparatus of any one of claims 6 to 8, wherein the first determination module comprises:
a sixth determining unit, configured to, in a case of displaying a vertical screen, if a proportion of the face area in the target image is greater than a fourth proportion threshold, use the second camera as a target image capture device;
a seventh determining unit, configured to, in a case of a landscape display, if a proportion of the face area in the target image is greater than a fifth proportion threshold, use the second camera as a target image capture device;
wherein the fourth scaling threshold is greater than the fifth scaling threshold.
10. The camera activation apparatus of claim 9, wherein the second determination module comprises:
an eighth determining unit, configured to, in a case of displaying a vertical screen, if a proportion of the face area in the target image is not greater than the fourth proportion threshold, use the first camera as a target camera device;
and a ninth determining unit, configured to, in a case of a landscape display, if a proportion of the face area in the target image is not greater than the fifth proportion threshold, use the first camera as a target imaging device.
11. A terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the camera booting method according to any one of claims 1 to 5 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the camera booting method according to one of the claims 1 to 5.
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| CN112887602A (en) * | 2021-01-26 | 2021-06-01 | Oppo广东移动通信有限公司 | Camera switching method and device, storage medium and electronic equipment |
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