CN106878616B - Method and system for automatically determining dynamic photo focus based on mobile terminal - Google Patents
Method and system for automatically determining dynamic photo focus based on mobile terminal Download PDFInfo
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- CN106878616B CN106878616B CN201710100408.XA CN201710100408A CN106878616B CN 106878616 B CN106878616 B CN 106878616B CN 201710100408 A CN201710100408 A CN 201710100408A CN 106878616 B CN106878616 B CN 106878616B
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- H—ELECTRICITY
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- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The invention discloses a method and a system for automatically determining a dynamic photo focus based on a mobile terminal, wherein the method comprises the steps of detecting each frame of image to obtain coordinates of different pixels in adjacent frames of images; obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images; and obtaining the focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels. The focus is selected by utilizing the dynamic content which continuously changes in the image, so that the trouble of manually selecting the focus can be avoided when a user takes a picture, the automatically selected focus can be more accurate and in place, the quality of the picture taken by the user is improved, and convenience is provided for the user.
Description
Technical Field
The invention relates to the field of systems, in particular to a method and a system for automatically determining a dynamic photo focus based on a mobile terminal.
Background
At present, mobile terminals are all provided with cameras, and taking pictures by using the camera function of the mobile terminal in daily life is one of the most used functions of general users; when taking a picture with a mobile terminal, the process generally includes: turning on the camera; focusing; a photograph is taken.
The focus in the picture is selected, the focus and the area near the focus are the clearest places in the picture, and the rest places in the picture are often not as clear as the focus and the area near the focus. For general use, even for taking photographs, this is required to highlight the subject in the photograph while fading out non-subjects. In the prior art, the focus is usually selected manually by a user through a touch screen or selected by sensed image content in a static environment, and a better focus selection method is not available for a dynamic picture, so that the prior art has defects and needs to be innovated and developed.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for automatically determining a dynamic photo focus based on a mobile terminal, aiming at the above-mentioned defects in the prior art. The invention aims to provide a method for automatically determining a focus of a dynamic photo, which aims to select the focus by using dynamic contents which change continuously in an image, so that the user can avoid the trouble of manually selecting the focus when taking the photo, and simultaneously, the automatically selected focus can be more accurate and in place, the quality of the photo taken by the user is improved, and convenience is provided for the user.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method for automatically determining a dynamic photo focus based on a mobile terminal comprises the following steps:
A. detecting each frame of image, and acquiring the position coordinates of different pixels in adjacent frames of images;
B. obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images;
C. and obtaining the focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels.
The method for automatically determining the focus of the dynamic photo based on the mobile terminal comprises the following specific steps:
a1, presetting a storage space capable of storing all pixel image data of two frames of images, for storing all pixel image data of the latest two frames of images;
a2, sequentially comparing the image data of all pixels of the two closest frame images in pixel-by-pixel order, and recording the coordinates of the pixels of the two closest frame images whose data are different.
The method for automatically determining the focus of the dynamic photo based on the mobile terminal, wherein the step B specifically comprises the following steps:
b1, obtaining the following four coordinates from the coordinates of the pixels with different data in the last two frames of images obtained in the step a 2: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis.
The method for automatically determining the focus of the dynamic photo based on the mobile terminal, wherein the step C specifically comprises the following steps:
and C1, calculating to obtain the focal point coordinate according to the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis obtained in the step B1, wherein the x axis value of the focal point is the average value of the minimum value of the x axis and the maximum value of the x axis, and the y axis value of the focal point is the average value of the minimum value of the y axis and the maximum value of the y axis.
A system for automatically determining a dynamic photo focus based on a mobile terminal, comprising:
the detection acquisition module is used for detecting each frame of image and acquiring the position coordinates of different pixels in adjacent frames of images;
the coordinate acquisition module is used for obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the acquired adjacent frame images;
and the focal point coordinate acquisition module is used for acquiring focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels.
The system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
the image data acquisition module is used for presetting a storage space capable of storing all pixel image data of two frames of images and storing all pixel image data of the latest two frames of images;
and the different pixel coordinate acquisition module is used for comparing all pixel image data of the two closest frame images in sequence according to pixels and recording the coordinates of the pixels with different data in the two closest frame images.
The system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
according to the coordinates of the pixels with different data in the two latest frames of images obtained by the different pixel coordinate obtaining modules, the following four coordinates are obtained in the coordinates: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis;
the system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
and the focus calculation module is used for calculating to obtain a focus coordinate according to the obtained x-axis minimum coordinate, the x-axis maximum coordinate, the y-axis minimum coordinate and the y-axis maximum coordinate, wherein the x-axis value of the focus is the average value of the x-axis minimum coordinate and the x-axis maximum coordinate, and the y-axis value of the focus is the average value of the y-axis minimum coordinate and the y-axis maximum coordinate.
The method and the system for automatically determining the dynamic photo focus based on the mobile terminal provided by the invention have the advantages that the coordinates of different pixels in adjacent frame images are obtained by detecting each frame image; obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images; and obtaining the focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels. The focus is selected by utilizing the dynamic content which continuously changes in the image, so that the trouble of manually selecting the focus can be avoided when a user takes a picture, the automatically selected focus can be more accurate and in place, the quality of the picture taken by the user is improved, and convenience is provided for the user.
Drawings
Fig. 1 is a flowchart of a method for automatically determining a dynamic photo focus based on a mobile terminal according to a preferred embodiment of the present invention.
Fig. 2 is a flowchart of a method for automatically determining a dynamic photo focus based on a mobile terminal according to a preferred embodiment of the present invention.
FIG. 3 is a flow chart of the system for automatically determining the focus of a dynamic photo based on a mobile terminal according to the preferred 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.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for automatically determining a dynamic photo focus based on a mobile terminal according to a preferred embodiment of the present invention. The method for automatically determining the dynamic photo focus based on the mobile terminal comprises the following steps:
and S100, detecting each frame of image, and acquiring coordinates of different pixels in adjacent frames of images.
In the embodiment of the invention, during specific implementation, a storage space capable of storing all pixel image data of two frames of images needs to be preset for storing all pixel image data of the latest two frames of images; for example, one pixel occupies two bytes of storage space, and the size of one frame of image is xm × ym, so that the total required storage space is xm × ym 2 × 2 bytes.
Comparing all pixel image data of the two closest frame images in turn by pixel, and recording the coordinates of the pixels with different data in the two closest frame images. FIG. 2 is a schematic diagram of pixel coordinates in each frame according to an embodiment of the method of the present invention, where P [1,1] in FIG. 2 represents image data in a first row and a first column in a frame image, P [1,2] represents image data in a first row and a second column in a frame image, … …, comparing sequentially whether image data at corresponding positions in two frames are the same, and if not, recording; if the data are not the same, it indicates that the photographed object is changing in time between the two frames.
And S200, obtaining the coordinates of the uppermost, lowermost, leftmost and rightmost pixels from the coordinates of the different pixels in the acquired adjacent frame images.
Specifically, based on the obtained coordinates of the pixels whose data are different in the last two frames of images, the following four coordinates are obtained in these coordinates: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis.
And S300, obtaining the focal point coordinate according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels.
Specifically, the focal point coordinate is obtained through calculation according to the obtained x-axis minimum coordinate, x-axis maximum coordinate, y-axis minimum coordinate and y-axis maximum coordinate, wherein the x-axis value of the focal point is the average value of the x-axis minimum coordinate and the x-axis maximum coordinate, and the y-axis value of the focal point is the average value of the y-axis minimum coordinate and the y-axis maximum coordinate.
In view of the above, in the method for automatically determining a dynamic photo focus based on a mobile terminal according to the embodiment of the present invention, coordinates of different pixels in adjacent frames of images are obtained by detecting each frame of image; obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images; and obtaining the focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels. The focus is selected by utilizing the dynamic content which continuously changes in the image, so that the user can avoid the trouble of manually selecting the focus when taking a picture, and meanwhile, the automatically selected focus can be more accurate and in place, the quality of the picture taken by the user is improved, the user experience is improved, and convenience is provided for the user.
Based on the above method embodiment, the present invention further provides a system for automatically determining a dynamic photo focus based on a mobile terminal, as shown in fig. 3, the system includes:
the detection obtaining module 210 is configured to detect each frame of image, and obtain position coordinates of different pixels in adjacent frames of images; as described above.
A coordinate obtaining module 220, configured to obtain coordinates of an uppermost pixel, a lowermost pixel, a leftmost pixel, and a rightmost pixel from the obtained coordinates of different pixels in the adjacent frame images; as described above.
A focus coordinate obtaining module 230, configured to obtain a focus coordinate according to the obtained coordinates of the uppermost, lowermost, leftmost, and rightmost pixels; as described above.
Further, the system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
the image data acquisition module is used for presetting a storage space capable of storing all pixel image data of two frames of images and storing all pixel image data of the latest two frames of images; as described above.
The different pixel coordinate acquisition module is used for comparing all pixel image data of the two closest frame images in sequence according to pixels and recording the coordinates of the pixels with different data in the two closest frame images; as described above.
Further, the system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
according to the coordinates of the pixels with different data in the two latest frames of images obtained by the different pixel coordinate obtaining modules, the following four coordinates are obtained in the coordinates: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis; as described above.
Further, the system for automatically determining the focus of a dynamic photo based on a mobile terminal further comprises:
the focus calculation module is used for calculating to obtain a focus coordinate according to the obtained x-axis minimum coordinate, the x-axis maximum coordinate, the y-axis minimum coordinate and the y-axis maximum coordinate, wherein the x-axis value of the focus is the average value of the x-axis minimum coordinate and the x-axis maximum coordinate, and the y-axis value of the focus is the average value of the y-axis minimum coordinate and the y-axis maximum coordinate; as described above.
In summary, according to the method and the system for automatically determining the focus of the dynamic photo based on the mobile terminal provided by the invention, the coordinates of different pixels in adjacent frames of images are obtained by detecting each frame of image; obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images; and obtaining the focal point coordinates according to the acquired coordinates of the uppermost, lowermost, leftmost and rightmost pixels. The focus is selected by utilizing the dynamic content which continuously changes in the image, so that the trouble of manually selecting the focus can be avoided when a user takes a picture, the automatically selected focus can be more accurate and in place, the quality of the picture taken by the user is improved, and convenience is provided for the user.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (2)
1. A method for automatically determining a dynamic photo focus based on a mobile terminal is characterized by comprising the following steps:
A. detecting each frame of image, and acquiring the position coordinates of different pixels in adjacent frames of images;
the step A specifically comprises the following steps:
a1, presetting a storage space capable of storing all pixel image data of two frames of images, for storing all pixel image data of the latest two frames of images;
a2, comparing all the image data of the pixels of the two closest frame images in turn according to the pixels, and recording the coordinates of the pixels with different data in the two closest frame images;
B. obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the adjacent frame images;
the step B specifically comprises the following steps:
b1, obtaining the following four coordinates from the coordinates of the pixels with different data in the last two frames of images obtained in the step a 2: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis;
C. obtaining a focus coordinate according to the obtained coordinates of the uppermost, lowermost, leftmost and rightmost pixels;
the step C specifically comprises the following steps:
and C1, calculating to obtain the focal point coordinate according to the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis obtained in the step B1, wherein the x axis value of the focal point is the average value of the minimum value of the x axis and the maximum value of the x axis, and the y axis value of the focal point is the average value of the minimum value of the y axis and the maximum value of the y axis.
2. A system for automatically determining a dynamic focus of a photograph based on a mobile terminal, comprising:
the detection acquisition module is used for detecting each frame of image and acquiring the position coordinates of different pixels in adjacent frames of images;
the image data acquisition module is used for presetting a storage space capable of storing all pixel image data of two frames of images and storing all pixel image data of the latest two frames of images;
the different pixel coordinate acquisition module is used for comparing all pixel image data of the two closest frame images in sequence according to pixels and recording the coordinates of the pixels with different data in the two closest frame images;
the coordinate acquisition module is used for obtaining the coordinates of the pixels at the top, the bottom, the left and the right from the coordinates of the different pixels in the acquired adjacent frame images; according to the coordinates of the pixels with different data in the two latest frames of images obtained by the different pixel coordinate obtaining modules, the following four coordinates are obtained in the coordinates: the coordinate of the minimum value of the x axis, the coordinate of the maximum value of the x axis, the coordinate of the minimum value of the y axis and the coordinate of the maximum value of the y axis;
the focal point coordinate acquisition module is used for acquiring focal point coordinates according to the acquired coordinates of the pixels at the top, the bottom, the left and the right;
the system further comprises:
and the focus calculation module is used for calculating to obtain a focus coordinate according to the obtained x-axis minimum coordinate, the x-axis maximum coordinate, the y-axis minimum coordinate and the y-axis maximum coordinate, wherein the x-axis value of the focus is the average value of the x-axis minimum coordinate and the x-axis maximum coordinate, and the y-axis value of the focus is the average value of the y-axis minimum coordinate and the y-axis maximum coordinate.
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| CN201710100408.XA CN106878616B (en) | 2017-02-23 | 2017-02-23 | Method and system for automatically determining dynamic photo focus based on mobile terminal |
| PCT/CN2018/075768 WO2018153269A1 (en) | 2017-02-23 | 2018-02-08 | Method and system for mobile terminal-based automatic determination of dynamic focal points in photos, and mobile terminal |
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| CN111309420A (en) * | 2020-02-06 | 2020-06-19 | Tcl移动通信科技（宁波）有限公司 | Startup picture display method and system, storage medium and terminal equipment |
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| JP2003125172A (en) * | 2001-10-10 | 2003-04-25 | Pfu Ltd | Control method for image reader |
| CN101840578B (en) * | 2009-03-17 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Camera device and dynamic detection method thereof |
| CN102469247A (en) * | 2010-11-09 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Photographic device and dynamic focusing method thereof |
| CN103369227A (en) * | 2012-03-26 | 2013-10-23 | 联想(北京)有限公司 | Photographing method of moving object and electronic equipment |
| JP2014085503A (en) * | 2012-10-23 | 2014-05-12 | Ricoh Co Ltd | Imaging apparatus and imaging method |
| JP5866493B2 (en) * | 2013-11-19 | 2016-02-17 | パナソニックＩｐマネジメント株式会社 | Imaging device |
| CN106324945A (en) * | 2015-06-30 | 2017-01-11 | 中兴通讯股份有限公司 | Non-contact automatic focusing method and device |
| CN106878616B (en) * | 2017-02-23 | 2020-06-09 | 惠州Tcl移动通信有限公司 | Method and system for automatically determining dynamic photo focus based on mobile terminal |
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