CN107026980B - Method and system for deleting out-of-focus picture - Google Patents
Method and system for deleting out-of-focus picture Download PDFInfo
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- CN107026980B CN107026980B CN201710282780.7A CN201710282780A CN107026980B CN 107026980 B CN107026980 B CN 107026980B CN 201710282780 A CN201710282780 A CN 201710282780A CN 107026980 B CN107026980 B CN 107026980B
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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
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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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Abstract
The invention relates to a method and a system for deleting an out-of-focus photo, which are suitable for mobile equipment and comprise the following steps: controlling a camera lens to focus an image through a processing module so as to obtain and analyze a characteristic parameter value of a target pre-rendered image; shooting the image through the camera lens to obtain and analyze a characteristic parameter value of a target image; and deleting the target image when the difference value between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-presenting image is judged to be larger than a system set value through the processing module. According to the method, the user does not need to manually delete the defocused blurred photos in the gallery, so that the photo sorting time is relatively saved, and the photo sorting efficiency of the user is improved; the memory used by the mobile phone of the user is not occupied; and all processes are interspersed in the focusing and photographing actions of the camera lens, so that the photographing process of a user is not influenced, the user is not forced to change the photographing habit, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of mobile terminals, in particular to a method and a system for deleting an out-of-focus picture.
Background
More and more intelligent terminals have the shooting function, people can use the intelligent terminals to shoot beautiful things at one's side at will, and people's amusement life is greatly enriched. For example, a person can make a call to contact with another person using a smart phone with a camera, and can also take a picture using the smart phone.
Out-of-focus (out-of-focus) means that the camera has already prompted accurate focusing during focusing, but the shot picture still has a virtual focus phenomenon. Especially when long-focus, large-aperture and short-distance photography is used, the depth of field obtained is extremely shallow, so that the picture blur occurs when the camera slightly deviates, and automatic focusing and manual focusing cannot be avoided. Therefore, the user needs to watch the taken picture, decide to keep the picture, or clear the blurred picture and take the picture again. However, when the number of accumulated photos is large, it takes a lot of time for the user to sort the photos.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a system for deleting an out-of-focus photo, which are used for solving the problem that a user is complicated to tidy the out-of-focus photo by using an intelligent terminal in the prior art.
The purpose and the technical problem of the invention can be realized by adopting the following technical scheme.
The method for deleting the out-of-focus picture, which is provided by the invention, is suitable for mobile equipment and comprises the following steps: controlling a camera lens to focus an image through a processing module so as to obtain and analyze a characteristic parameter value of a target pre-rendered image; shooting the image through the camera lens to obtain and analyze a characteristic parameter value of a target image; and deleting the target image when the difference value between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-presenting image is judged to be larger than a system set value through the processing module.
Wherein, the camera lens is a contrast camera lens; the step of controlling a camera lens to focus an image through a processing module to obtain and analyze the characteristic parameter value of the target pre-rendered image comprises the following steps: when the processing module controls the contrast camera lens to focus the image in a contrast type focusing mode, the processing module searches the lens position with the maximum contrast according to the contrast change value of the picture at the focus, and obtains the target pre-rendered image at the lens position.
Wherein the characteristic parameter values of the target pre-rendered image include: and the parameters of Gaussian blur and pixel color dizzy of the target pre-rendered image.
The camera lens is a phase camera lens; the step of controlling a camera lens to focus an image through a processing module to obtain and analyze the characteristic parameter value of the target pre-rendered image comprises the following steps: when the processing module controls the phase camera lens to focus the image in a phase-type focusing mode, the processing module searches a lens position with minimum aberration according to a phase value at a focus, and obtains the target pre-rendered image at the lens position.
Wherein the characteristic parameter values of the target pre-rendered image include: and the parameter values of the aberration, the contrast and the depth of field of the target pre-presenting image.
The purpose and the technical problem to be solved by the invention can be further realized by adopting the following technical measures.
The invention provides a system for deleting an out-of-focus picture, which is suitable for mobile equipment and comprises: the camera lens is used for focusing an image to obtain and analyze a characteristic parameter value of a target pre-presented image and shooting the image to obtain and analyze the characteristic parameter value of the target image; the storage module is used for storing the characteristic parameter value of the target pre-presenting image and the characteristic parameter value of the target image; and the processing module is used for deleting the target image when judging that the difference value between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-presenting image is greater than a system set value.
Wherein, the camera lens is a contrast camera lens; the processing module comprises: and when the contrast camera lens is controlled to focus the image in a contrast type focusing mode, searching the lens position with the maximum contrast according to the contrast change value of the picture at the focus, and acquiring the target pre-rendered image at the lens position.
Wherein the characteristic parameter values of the target pre-rendered image include: and the parameters of Gaussian blur and pixel color dizzy of the target pre-rendered image.
The camera lens is a phase camera lens; the processing module comprises: and when the phase camera lens is controlled to focus the image in a phase type focusing mode, searching the lens position with the minimum aberration according to the phase value at the focus, and obtaining the target pre-rendered image at the lens position.
Wherein the characteristic parameter values of the target pre-rendered image include: and the parameter values of the aberration, the contrast and the depth of field of the target pre-presenting image.
By the technical scheme and measures, the method and the system for deleting the out-of-focus photos have the following advantages: 1. after the photo is taken, the mobile phone deletes the out-of-focus photo by itself; 2. the user does not need to manually delete the defocused blurred photos in the gallery, so that the photo sorting time is relatively saved, and the photo sorting efficiency of the user is improved; 3. the fuzzy photos do not exist in the gallery, and the use memory of the mobile phone of the user is not occupied; 4. all processes are inserted in the camera phase focusing and photographing action, so that the photographing process of a user is not influenced, and the user is not forced to change the photographing habit.
Drawings
Fig. 1A to 1B are schematic block diagrams of a system for deleting an out-of-focus picture according to the present invention.
Fig. 2A to 2C are schematic flow charts of a method for deleting an out-of-focus photo according to the present invention.
Fig. 3A to 3B are schematic diagrams of an embodiment of a method for deleting an out-of-focus photo and a system thereof according to the present invention.
Detailed Description
To further illustrate the technical means and effects thereof adopted by the method and system for deleting an out-of-focus photo according to the present invention to achieve the predetermined object, the following detailed description will be given to the embodiments, structures, features and effects thereof of the method and system for deleting an out-of-focus photo according to the present invention with reference to the accompanying drawings and preferred embodiments.
Please refer to fig. 1A to 1B, which are schematic block diagrams of a system for deleting an out-of-focus photo according to the present invention.
In fig. 1A, a first system for deleting out-of-focus photos, which is provided by the present invention, is applicable to a mobile device, including; a contrast camera lens 110 for focusing an image to obtain and analyze a characteristic parameter value of a pre-rendered image 111 and capturing the image to obtain and analyze a characteristic parameter value of a captured picture 112; a storage module 120, for storing the characteristic parameter values of the pre-rendered image 111 and the characteristic parameter values of the photo 112; a processing module 130, configured to delete the photo 112 when the difference between the characteristic parameter value of the photo 112 and the characteristic parameter value of the pre-rendered image 111 is greater than a system setting value.
In one embodiment, the processing module 130 includes: when the contrast camera lens 110 is controlled to focus the image in a contrast focusing manner, the lens position with the maximum contrast is searched according to the contrast variation value of the picture at the focus, and the pre-rendered image 111 is obtained at the lens position. The contrast focusing principle is specifically explained as follows:
(1) in the out-of-focus state, because the picture of the whole focus is in a virtual focus state and is similar to a Gaussian blur effect, the colors among pixels are uniform;
(2) focusing is started, the lens starts to move, the picture is gradually clear, and the contrast begins to rise;
(3) in a focusing state, the picture is clearest, the contrast is highest, but the camera does not know, so the lens can be continuously moved;
(4) continued movement of the lens found that the contrast began to drop. Further moving the lens to find that the contrast ratio further decreases, knowing that the focal point has been missed by the camera, and returning the lens to the position with the highest contrast ratio;
(5) the lens is made to reciprocate back and forth in such a cycle so as to reach the position with the highest contrast and finish focusing.
In one embodiment, the characteristic parameter values of the pre-rendered image 111 include: a Gaussian blur 121 parameter value and a pixel color flare 122 parameter value of the pre-rendered image; in addition, the characteristic parameter values of the photo 112 also include a gaussian blur parameter value and a pixel color halo and dizzy parameter value, and the processing module 130 compares the gaussian blur parameter value and the pixel color halo and dizzy parameter value of the photo 112 and the pre-rendered image 111 respectively to analyze whether the photo 112 needs to be deleted.
In one embodiment, the processing module 130 includes: the contrast camera lens 110 is controlled to record a contrast change value of a picture in focus during focusing. During the movement of the lens, a pre-image is produced in the shooting range as soon as the contrast starts to decrease. When the lens is displaced, the times of focusing and imaging which accord with the optimal contrast ratio are not only once, a plurality of pre-images can be generated, and two pre-images with the best contrast ratio are selected as the upper and lower allowable limits of Gaussian blur. The contrast camera lens 110 generates a picture 112 after taking, and the processing module 130 analyzes whether the picture 112 falls within the range of the upper and lower allowable limits of the gaussian blur, thereby determining whether the picture 112 is an out-of-focus picture; when it is judged that the photograph is out of focus, the photograph 112 is deleted.
In fig. 1B, a second system for deleting out-of-focus photos according to the present invention is applicable to a mobile device, including; a phase camera lens 140 for focusing an image to obtain and analyze the characteristic parameter value of the pre-rendered image 111 and capturing the image to obtain and analyze the characteristic parameter value of the captured picture 112; a storage module 120, for storing the characteristic parameter values of the pre-rendered image 111 and the characteristic parameter values of the photo 112; a processing module 130, configured to delete the photo 112 when the difference between the characteristic parameter value of the photo 112 and the characteristic parameter value of the pre-rendered image 111 is greater than a system setting value.
In one embodiment, the processing module 130 includes: when the phase-imaging lens 140 is controlled to focus the image in a phase-focusing manner, the lens position with the minimum aberration is found according to the phase value at the focus, and the pre-rendered image 111 is obtained at the lens position. The phase focusing principle is described as follows: a certain point of the object can emit light rays from all directions and image the light rays onto the sensor through the lens, and when the light rays in different directions image the same position of the sensor, the aberration is minimum. The best sharpness of the image is when the contrast is maximum and the aberrations are minimum.
In one embodiment, the characteristic parameter values of the pre-rendered image 111 include: the pre-rendered image has an aberration 123 parameter, a contrast 124 parameter, and a depth 125 parameter. In addition, the characteristic parameter values of the photograph 112 also include: aberration parameter values, contrast parameter values, and depth of field parameter values.
In one embodiment, the method further comprises: the processing module 130 compares the pre-rendered image 111 with the focusing parameters recorded at the moment of taking the photo 112, thereby determining whether the photo is out-of-focus (out-of-focus). Once the photograph is judged to be out of focus, the photograph is deleted. A switch can be set for the function, so that the function can be turned on or off manually by a user.
Fig. 2A to 2C are schematic flow charts of a method for deleting an out-of-focus photo according to the present invention.
In fig. 2A, an overall flowchart of a method for deleting an out-of-focus photo according to the present invention is shown, which is suitable for a mobile device, and includes the following steps:
step S210, controlling a camera lens to focus an image through a processing module so as to obtain and analyze a characteristic parameter value of a target pre-rendered image;
step S220, shooting the image through the camera lens to obtain and analyze a characteristic parameter value of a target image;
step S230, when the difference between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-rendering image is determined to be greater than a system setting value by the processing module, deleting the target image.
In one embodiment, the characteristic parameter values of the target pre-rendered image and the characteristic parameter values of the target image may be stored in a Read Only Memory (ROM) of the device or temporarily stored in a Random Access Memory (RAM) of the device.
In one embodiment, the camera lens is a contrast camera lens; the step of controlling a camera lens to focus an image through a processing module to obtain and analyze the characteristic parameter value of the target pre-rendered image comprises the following steps: when the processing module controls the contrast camera lens to focus the image in a contrast type focusing mode, the processing module searches the lens position with the maximum contrast according to the contrast change value of the picture at the focus, and obtains the target pre-rendered image at the lens position. The characteristic parameter values of the target pre-rendered image comprise Gaussian blur and pixel color dizziness of the target pre-rendered image.
In one embodiment, the camera lens is a phase camera lens; the step of controlling a camera lens to focus an image through a processing module to obtain and analyze the characteristic parameter value of the target pre-rendered image comprises the following steps: when the processing module controls the phase camera lens to focus the image in a phase-type focusing mode, the processing module searches a lens position with minimum aberration according to a phase value at a focus, and obtains the target pre-rendered image at the lens position. The characteristic parameter values of the target pre-rendered image comprise parameter values of aberration, contrast and depth of field of the target pre-rendered image.
In fig. 2B, a first detailed flowchart of a method for deleting an out-of-focus photo according to the present invention is applicable to a mobile device, and includes the following steps:
s211, focusing an image through a contrast camera;
step S221, more than one pre-rendered image with better contrast is obtained during focusing;
s231, selecting two pre-rendered images with best contrast as the upper and lower allowable limits of Gaussian blur;
step S241, recording the shot picture and analyzing whether the picture falls in the range of the upper and lower allowable limits of Gaussian blur;
step S251 is the photograph out of focus? When the photo is determined to be out-of-focus, executing step S251A, otherwise, executing step S251B;
step S251A, deleting the photo;
step S251B, the photo is saved.
In fig. 2C, a second detailed flowchart of a method for deleting an out-of-focus photo according to the present invention is applicable to a mobile device, and includes the following steps:
step S212, focusing an image through a phase camera lens;
step S222, when the best focusing parameter is found during the phase focusing, a pre-presenting image is generated in the shooting range picture;
step S232, recording the shot picture, and analyzing the difference degree of the picture and the pre-presented image at the overlapped part;
the difference degree of the picture and the pre-presented image at the superposition part is analyzed by respectively comparing the aberration, the contrast, the depth of field and the focusing parameter value of the camera lens of the picture and the pre-presented image.
Step S242 is the photograph out of focus? When the photo is determined to be out-of-focus, executing step S242A, otherwise, executing step S242B;
step S242A, deleting the photo;
step S242B, the photo is saved.
Please refer to fig. 3A to 3B, which are schematic diagrams of an embodiment of a method and a system for deleting an out-of-focus photo according to the present invention, and refer to fig. 1A to 1B in combination.
Referring to fig. 3A, a user takes a picture with a mobile phone 300. During photographing, a camera lens is controlled by the processing module 130 in the mobile phone 300 to focus an image, and when the focusing is successful, the characteristic parameter value of the pre-rendered image 301 is obtained and analyzed.
In one embodiment, when the camera lens performs focusing on an image in a contrast focusing manner, a lens position with the maximum contrast is found according to a contrast variation value of a picture at the focus, and a pre-rendered image 301 is obtained at the lens position. Wherein, the characteristic parameter values of the pre-rendered image 301 include: parameter values of gaussian blur and pixel color flare.
In one embodiment, when the camera lens performs focusing on an image in a phase focusing manner, a lens position with minimum aberration is found according to a phase value at a focal point, and a pre-rendered image 301 is obtained at the lens position. The characteristic parameter values of the pre-rendered image 301 include: values of parameters of aberration, contrast and depth of field.
Referring to fig. 3B, the image is captured through the camera lens, and the characteristic parameter values of the captured picture 302 are obtained and analyzed after the image is captured; when the difference between the characteristic parameter value of the photographed picture 302 and the characteristic parameter value of the pre-rendered image 301 is determined to be greater than a system setting value by the processing module 130, the photographed picture 302 is deleted. Wherein, a prompt message 303 is displayed when necessary to remind the user that the photo is out-of-focus blurred and is deleted in the photo album.
In one embodiment, the method further comprises: the mobile phone for taking pictures is a mobile phone with a camera lens, and is just one example of a mobile device. In addition, mobile devices include, but are not limited to, laptops, tablets, smart phones, multimedia players, Personal Digital Assistants (PDAs), cameras, and the like.
In the present invention, the method of deleting out-of-focus photos and the system thereof have the advantages of: 1. after the photo is taken, the mobile phone deletes the out-of-focus photo by itself; 2. the user does not need to manually delete the defocused blurred photos in the gallery, so that the photo sorting time is relatively saved, and the photo sorting efficiency of the user is improved; 3. the fuzzy photos do not exist in the gallery, and the use memory of the mobile phone of the user is not occupied; 4. all processes are inserted in the camera phase focusing and photographing action, so that the photographing process of a user is not influenced, and the user is not forced to change the photographing habit.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A method for deleting an out-of-focus photo, which is suitable for a mobile device, is characterized by comprising the following steps:
controlling a camera lens to focus an image through a processing module so as to obtain and analyze a characteristic parameter value of a target pre-rendered image, wherein the camera lens is a contrast camera lens;
shooting the image through the camera lens to obtain and analyze a characteristic parameter value of a target image; and
deleting the target image when the difference value between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-presenting image is judged to be larger than a system set value through the processing module;
when the processing module controls the contrast camera lens to focus the image in a contrast type focusing mode, the processing module searches the lens position with the maximum contrast according to the contrast change value of the picture at the focus, and obtains the target pre-rendered image at the lens position.
2. The method of claim 1, wherein the characteristic parameter values of the target pre-rendered image comprise parameters of gaussian blur and pixel color blur of the target pre-rendered image.
3. The method of claim 1, wherein the camera lens is a phase camera lens; the step of controlling a camera lens to focus an image through a processing module to obtain and analyze the characteristic parameter value of the target pre-rendered image comprises the following steps:
when the processing module controls the phase camera lens to focus the image in a phase-type focusing mode, the processing module searches a lens position with minimum aberration according to a phase value at a focus, and obtains the target pre-rendered image at the lens position.
4. The method of claim 3, wherein the characteristic parameter values of the target pre-rendered image comprise the parameter values of aberration, contrast and depth of field of the target pre-rendered image.
5. A system for deleting out-of-focus photos, adapted for use with a mobile device, comprising:
the camera lens is used for focusing an image to obtain and analyze a characteristic parameter value of a target pre-appearing image and shooting the image to obtain and analyze the characteristic parameter value of the target image, and the camera lens is a contrast camera lens;
the storage module is used for storing the characteristic parameter value of the target pre-presenting image and the characteristic parameter value of the target image; and
and the processing module is used for searching the lens position with the maximum contrast according to the contrast change value of the picture at the focus when the contrast camera lens is controlled to focus the image in a contrast type focusing mode, acquiring the target pre-rendered image at the lens position, and deleting the target image when the difference value between the characteristic parameter value of the target image and the characteristic parameter value of the target pre-rendered image is judged to be larger than a system set value.
6. The system for deleting out-of-focus photos of claim 5, wherein the characteristic parameter values of the target pre-rendered image comprise parameter values of Gaussian blur and pixel color blur of the target pre-rendered image.
7. The system for deleting out-of-focus photos of claim 5, wherein said camera lens is a phase camera lens; the processing module comprises: and when the phase camera lens is controlled to focus the image in a phase type focusing mode, searching the lens position with the minimum aberration according to the phase value at the focus, and obtaining the target pre-rendered image at the lens position.
8. The system for deleting out-of-focus photos of claim 7, wherein said target pre-rendered image characteristic parameter values include aberration, contrast and depth of field parameter values of said target pre-rendered image.
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