CN109040593B - Photographing focusing method based on dynamic environment, terminal and storage medium - Google Patents
Photographing focusing method based on dynamic environment, terminal and storage medium Download PDFInfo
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- CN109040593B CN109040593B CN201810966572.3A CN201810966572A CN109040593B CN 109040593 B CN109040593 B CN 109040593B CN 201810966572 A CN201810966572 A CN 201810966572A CN 109040593 B CN109040593 B CN 109040593B
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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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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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
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
Abstract
The invention provides a photographing focusing method based on a dynamic environment, a mobile terminal and a storage medium, wherein during photographing, luminance signals of a plurality of preset coordinate points in a preset photographing preset area are taken and processed to obtain pulse signals corresponding to the luminance signals; and comparing pulse signals of adjacent preset coordinate points, screening out a plurality of adjacent preset coordinate points with the minimum amplitude difference, and taking the central point of an area formed by the plurality of preset coordinate points as the focusing point of the target object to focus and photograph the target object. The method provided by the invention reflects the main characteristics of the object according to the basic invariance of the brightness signal of the dynamic target object, so that the repeated focusing is not needed when the dynamic target object is photographed, and the rapid focusing photographing can be realized as long as the target object is in the preset area.
Description
Technical Field
The invention relates to the technical field of photographing, in particular to a photographing focusing method based on a dynamic environment, a terminal and a storage medium.
Background
At present, the photographing function of a mobile terminal is frequently applied in life, in order to take a clear picture, a photographed target needs to be focused, that is, once photographing is needed, focusing needs to be performed once, if a photographed object is in a dynamic state, rapid and repeated focusing on the photographed target cannot be realized, that is, when photographing and focusing are performed, rapid focusing on the photographed object cannot be performed in a short time, so that the photographed target cannot be rapidly and accurately focused, and a clear image cannot be taken.
Therefore, the prior art is subject to further improvement.
Disclosure of Invention
In view of the defects in the prior art, the invention provides a photographing focusing method based on a dynamic environment, a terminal and a storage medium, and aims to solve the technical problem that a photographing target in a dynamic state cannot be rapidly focused in the prior art.
The first embodiment of the present invention provides a photographing focusing method based on a dynamic environment, wherein the method comprises:
after a photographing instruction is received, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area;
processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes corresponding to the adjacent preset coordinate points and the maximum total number, and taking the central points of the areas formed by the preset coordinate points as the focusing points of the target object to focus and photograph the target object.
Optionally, the photographing focusing method based on the dynamic environment further includes:
presetting a photographing preset area, setting a plurality of preset coordinate points in each photographing preset area, and storing the coordinate values of the preset coordinate points; and the coordinate values of the preset coordinate points correspond to the focusing and photographing instructions one by one.
Optionally, a central point of a region formed by the plurality of preset coordinate points is used as a focusing point of the target object, and the step of focusing and photographing the target object includes:
taking the center of the preset area as an origin of a coordinate axis, and selecting one point at intervals of a preset distance as a preset coordinate point;
the maximum area of the preset area is the area of a display screen of the mobile terminal.
Optionally, the step of screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes and the maximum total number between adjacent preset coordinate points further includes:
comparing pulse signals of any two preset coordinate points which are adjacent in the transverse direction and the longitudinal direction, screening out the coordinate point with the minimum amplitude difference value of the pulse signals, and forming an area by a plurality of adjacent coordinate points;
one or more coordinate point composition areas exist in a preset area;
and comparing one or more coordinate point composition areas, and taking the central point of the coordinate point composition area with the largest area as the focusing point of the target object.
Optionally, the central point of the area formed by the plurality of preset coordinate points is used as the focusing point of the target object, and the step of focusing and photographing the target object further includes:
and the processor acquires the maximum coordinate of the central point of the coordinate point composition area, calls a fixed-focus photographing instruction corresponding to the coordinate value of the central point coordinate, and focuses the target object.
A second embodiment of the present disclosure is a photographing focusing system based on a dynamic environment, wherein the photographing focusing system includes:
the regional brightness acquisition module is used for acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset region after receiving a photographing instruction;
the signal conversion module is used for processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and the screening and focusing module is used for comparing pulse signals of the adjacent preset coordinate points, screening a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitude values and the maximum total number between the adjacent preset coordinate points, and taking the central point of a region formed by the preset coordinate points as a focusing point of the target object to focus and photograph the target object.
A third embodiment of the present disclosure is a mobile terminal, including: a processor, a memory, and a focus-taking control program stored on the memory and executable on the processor, wherein the focus-taking control program when executed by the processor implements the steps of:
after a photographing instruction is received, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area;
processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes corresponding to the adjacent preset coordinate points and the maximum total number, and taking the central points of the areas formed by the preset coordinate points as the focusing points of the target object to focus and photograph the target object.
A fourth embodiment of the present invention is a computer-readable storage medium, comprising: the computer readable storage medium is stored with a photographing and focusing control program, and the photographing and focusing control program is executed by a processor to realize the steps of the photographing and focusing method based on the dynamic environment.
The invention has the beneficial effects that the invention provides a shooting focusing method, a mobile terminal and a storage medium based on a dynamic environment, when shooting, brightness signals of a plurality of preset coordinate points in a preset shooting preset area are taken, and pulse signals corresponding to the brightness signals are obtained through processing; and comparing pulse signals of adjacent preset coordinate points, screening out a plurality of adjacent preset coordinate points with the minimum amplitude difference, and taking the central point of an area formed by the plurality of preset coordinate points as the focusing point of the target object to focus and photograph the target object. The method provided by the invention reflects the main characteristics of the object according to the basic invariance of the brightness signal of the dynamic target object, so that the repeated focusing is not needed when the dynamic target object is photographed, and the rapid focusing photographing can be realized as long as the target object is in the preset area.
Drawings
FIG. 1 is a flowchart illustrating steps of a photographing focusing method based on a dynamic environment according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a specific application of the method provided by the present invention;
FIG. 3 is a diagram of a focusing system for photographing based on dynamic environment according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a mobile terminal according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A first embodiment of the present invention provides a photographing focusing method based on a dynamic environment, as shown in fig. 1, wherein the method includes:
and S1, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area after receiving the photographing instruction.
When the target object is in a dynamic state, an image on the display screen is not required to be clicked for focusing, the photographing key is directly pressed, the screen end receives a photographing instruction, brightness signals of a plurality of preset coordinate points in a preset photographing preset area are obtained, the maximum area of the preset area is the area of the display screen of the mobile terminal, the preset area can be set to be in any shape such as a circle and a rectangle, the position can be set to any position in the display screen, and the area of the preset area is not limited.
Preferably, the user can set the parameters of the preset region according to the setting step, and the parameters select the shape, the central point and the area size of the preset region; or entering a self-defining mode, and drawing an irregular area on the display screen as a preset area.
After the preset area is determined, a rectangular coordinate system is established by taking the center of the preset area as the origin of coordinates, one point is selected as a preset coordinate point every preset distance, the preset distance is within the range of 0.001 mm-0.05 mm and can be set by a user, if the requirement on the imaging definition of the picture is high, the preset distance can be set to be smaller, otherwise, if the requirement is not high, the preset distance can be set to be larger, and the operation amount of a processor is reduced.
The preset coordinate points are all coordinate points contained in a preset area, and the preset coordinate points divide the preset area into a plurality of small grids with the side length of 0.001 mm-0.005 mm. And the screen end acquires the brightness signal of each preset coordinate point.
S2: processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
in the time interval Δ t, the brightness value of each preset coordinate point changes with time due to the fact that the preset coordinate point is in a dynamic state, the brightness signal is an analog signal, a pulse signal corresponding to the brightness signal of each preset coordinate point is obtained through signal processing, the pulse signal is a signal related to time and amplitude, and the amplitude describes the intensity of the brightness.
S3: and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes corresponding to the adjacent preset coordinate points and the maximum total number, and taking the central points of the areas formed by the preset coordinate points as the focusing points of the target object to focus and photograph the target object.
Further, the step of screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes corresponding to adjacent preset coordinate points and the maximum total number further comprises:
comparing pulse signals of any two adjacent preset coordinate points in the transverse direction and the longitudinal direction, screening the preset coordinate point with the minimum amplitude difference value of the pulse signals, and enabling a plurality of adjacent preset coordinate points to form an area;
one or more preset coordinate point composition areas exist in a preset area;
and comparing one or more preset coordinate point composition areas, and taking the central point of the coordinate point composition area with the largest area as the focusing point of the target object.
The other adjacent preset coordinate points exist in the preset coordinate points in the four directions of up, down, left and right, pulse signals of the preset adjacent coordinate points are compared in pairs, and the preset coordinate points which are consistent in change of the pulse signals of the adjacent preset coordinate points in the time interval delta t are screened out;
the pulse signals are changed consistently in the time interval delta t, and the difference value d11 between the pulse amplitude of the preset coordinate point 1 at the time 0 and the pulse amplitude of the preset coordinate point at the time 1/2 delta t and the difference value d12 between the pulse amplitude of the preset coordinate point at the time 1/2 delta t and the pulse amplitude of the preset coordinate point at the time delta t are calculated; the difference value d21 between the pulse amplitude of the pulse amplitude at the time 0 and the pulse amplitude at the time 1/2 Δ t, and the difference value d22 between the pulse amplitude at the time 1/2 Δ t and the pulse amplitude at the time Δ t of the pulse amplitude of the preset coordinate point 2 adjacent to the preset coordinate point 1; since Δ t is small, if d11= d21 and d12= d22, it can be said that the changes of the pulse amplitudes of the adjacent coordinate points 1 and 2 are equal; because actual conditions are not completely equal, screening out a preset coordinate point with the minimum difference value of pulse signal amplitudes, wherein a plurality of mutually adjacent preset coordinate points exist, and the plurality of preset coordinate points form an area, namely an area covered by the plurality of preset coordinate points;
one or more preset coordinate point composition areas may exist in the preset area, and when only one preset coordinate point composition area exists, the center point of the only screened preset coordinate point composition area is used as the focus point of the target object; and if a plurality of areas formed by the screened preset coordinate points appear, taking the central point of the area formed by the coordinate points with the largest area as the focusing point of the target object, and focusing and photographing the target object.
Further, the photographing focusing method based on the dynamic environment further includes: presetting a photographing preset area, setting a plurality of preset coordinate points in each photographing preset area, and storing the coordinate values of the preset coordinate points;
and the coordinate values of the preset coordinate points correspond to the focusing and photographing instructions one by one.
The processor acquires the coordinate of the central point of the largest coordinate point composition area and calls a fixed-focus photographing signal corresponding to the coordinate value of the central point coordinate;
sending a focusing processing signal to a processor;
and the processor acquires the coordinate value of the central point according to the received focusing processing signal, calls a focusing photographing instruction corresponding to the coordinate value and focuses the target object.
The above-described method disclosed by the present invention is further described in more detail below with reference to fig. 2 by way of example.
K1, setting a preset area in a photographing interface, and selecting a regular graph according to the step setting, wherein the regular graph is a square in the example and is positioned at the center of a screen, and the side length is half of the width of the screen;
conceivably, the screen area of the whole display screen can also be set as a preset area;
it should be understood that, in the above method, an irregular area may be drawn on the screen by user-defining, that is, the position and size of the graphic, that is, the position and size of the preset area, may be drawn by user-defining, such a manner is simpler, and the operation of setting parameters is omitted.
K2, establishing a rectangular coordinate system by taking the center of the preset area as the origin of coordinates, wherein the preset distance is 0.02mm, and selecting all preset coordinate points which are distributed in the preset area.
K3, pressing the photographing key in the screen, that is, the screen receives the photographing instruction, and the processor 10 obtains the brightness signals of all the preset coordinate points after detecting that the screen receives the photographing instruction.
K4, signal conversion module 102, to brightness signal processing, to get the corresponding pulse signal, screening focusing module 103, to compare the pulse signal of the adjacent preset coordinate points, to calculate and screen out a plurality of pulse signal change the same preset coordinate points, composed of a plurality of preset coordinate points, the center of which is as the focus.
K5, the processor 10 obtains the coordinates of the central point, calls a fixed-focus photographing instruction corresponding to the coordinate values of the central point coordinates, and performs focusing photographing on the photographing target.
And after the photographing target object moves in the background environment in a fast change manner and is subjected to the first focusing photographing, the photographing target object in the preset area is quickly positioned, and the focusing photographing of the photographing target object is instantly realized.
A second embodiment of the present invention is a focusing system for photographing based on dynamic environment, as shown in fig. 3, including:
the regional brightness acquisition module 101 is configured to acquire brightness signals of a plurality of preset coordinate points in a preset photographing preset region after receiving a photographing instruction; the function of which is as described in step S1.
The signal conversion module 102 is configured to process the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points; the function of which is as described in step S2.
The screening and focusing module 103 is configured to compare the pulse signals of the adjacent preset coordinate points, screen out a plurality of preset coordinate points with the smallest difference value and the largest total number of corresponding pulse signal amplitudes between the adjacent preset coordinate points, and take a focus of the target object with a central point of an area formed by the plurality of preset coordinate points, so as to take a picture of the target object, where the function is as in step S3.
A third embodiment of the present disclosure is a mobile terminal, as shown in fig. 4, wherein the mobile terminal includes: a processor 10, a memory 20 and a focus-taking control program stored on the memory 20 and operable on the processor 10, wherein the focus-taking control program when executed by the processor 10 implements the steps of:
after a photographing instruction is received, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area;
processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value of the pulse signal amplitudes corresponding to the adjacent preset coordinate points and the maximum total number, and taking the central points of the areas formed by the preset coordinate points as the focusing points of the target object to focus and photograph the target object.
A fourth embodiment of the present invention is a computer-readable storage medium, comprising: the computer readable storage medium is stored with a photographing and focusing control program, and the photographing and focusing control program is executed by a processor to realize the steps of the photographing and focusing method based on the dynamic environment.
The invention provides a photographing focusing method based on a dynamic environment, a mobile terminal and a storage medium, wherein during photographing, luminance signals of a plurality of preset coordinate points in a preset photographing preset area are taken and processed to obtain pulse signals corresponding to the luminance signals; and comparing pulse signals of adjacent preset coordinate points, screening out a plurality of adjacent preset coordinate points with the minimum amplitude difference, and taking the central point of an area formed by the plurality of preset coordinate points as the focusing point of the target object to focus and photograph the target object. The method provided by the invention reflects the main characteristics of the object according to the basic invariance of the brightness signal of the dynamic target object, so that the repeated focusing is not needed when the dynamic target object is photographed, and the rapid focusing photographing can be realized as long as the target object is in the preset area.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (8)
1. A photographing focusing method based on a dynamic environment is characterized by comprising the following steps:
after a photographing instruction is received, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area;
processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value and the maximum total number of the change amplitude values of the pulse signals corresponding to the adjacent preset coordinate points in the time interval delta t, and taking the central point of a region formed by the plurality of preset coordinate points as the focus of the target object to focus and photograph the target object.
2. The dynamic environment-based focusing method for photographing as claimed in claim 1, further comprising:
presetting a photographing preset area, setting a plurality of preset coordinate points in each photographing preset area, and storing the coordinate values of the preset coordinate points;
and the coordinate values of the preset coordinate points correspond to the focusing and photographing instructions one by one.
3. The method of claim 2, wherein a center point of the area formed by the plurality of predetermined coordinate points is used as a focusing point of the target object, and the step of focusing and photographing the target object comprises:
taking the center of the preset area as an origin of a coordinate axis, and selecting one point at intervals of a preset distance as a preset coordinate point;
the maximum area of the preset area is the area of a display screen of the mobile terminal.
4. The method of claim 2, wherein the step of selecting the preset coordinate points with the smallest difference between the changing amplitudes of the pulse signals corresponding to the adjacent preset coordinate points within the time interval Δ t and the largest total number further comprises:
comparing pulse signals of any two adjacent preset coordinate points in the transverse direction and the longitudinal direction, screening the preset coordinate point with the minimum change amplitude difference value of the pulse signals in a time interval delta t, and forming an area by a plurality of adjacent preset coordinate points;
one or more preset coordinate point composition areas exist in a preset area;
and comparing one or more preset coordinate point composition areas, and taking the central point of the coordinate point composition area with the largest area as the focusing point of the target object.
5. The method as claimed in claim 1, wherein a central point of the area formed by the plurality of predetermined coordinate points is used as a focusing point of the target object, and the step of performing focusing photographing on the target object further comprises:
and the processor acquires the maximum coordinate of the central point of the coordinate point composition area, calls a fixed-focus photographing instruction corresponding to the coordinate value of the central point coordinate, and focuses the target object.
6. A photographing fixed focus system based on a dynamic environment is characterized by comprising:
the regional brightness acquisition module is used for acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset region after receiving a photographing instruction;
the signal conversion module is used for processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and the screening and focusing module is used for comparing pulse signals of adjacent preset coordinate points, screening a plurality of preset coordinate points with the minimum difference value and the maximum total number of change amplitude values of the pulse signals corresponding to the adjacent preset coordinate points in a time interval delta t, and taking the central point of an area formed by the preset coordinate points as a focus point of the target object to focus and photograph the target object.
7. A mobile terminal, comprising: a processor, a memory, and a focus-taking control program stored on the memory and executable on the processor, wherein the focus-taking control program when executed by the processor implements the steps of:
after a photographing instruction is received, acquiring brightness signals of a plurality of preset coordinate points in a preset photographing preset area;
processing the acquired brightness signals of the preset coordinate points to obtain pulse signals corresponding to the brightness signals of the preset coordinate points;
and comparing the pulse signals of the adjacent preset coordinate points, screening out a plurality of preset coordinate points with the minimum difference value and the maximum total number of the change amplitude values of the pulse signals corresponding to the adjacent preset coordinate points in the time interval delta t, and taking the central point of a region formed by the plurality of preset coordinate points as the focus of the target object to focus and photograph the target object.
8. A computer-readable storage medium, wherein a control program for focus of taking a picture is stored on the computer-readable storage medium, and when executed by a processor, the control program for focus of taking a picture implements the steps of the picture positioning method according to any one of claims 1 to 5.
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| JP2006196281A (en) * | 2005-01-13 | 2006-07-27 | Hitachi High-Technologies Corp | Scanning electron microscope and its photographing method |
| CN105379247A (en) * | 2013-12-10 | 2016-03-02 | 奥林巴斯株式会社 | Image processing device, display device, image pickup device, and image processing method and program |
| CN103763458A (en) * | 2014-01-20 | 2014-04-30 | 华为技术有限公司 | Scene change detection method and device |
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