CN106528639A - Mobile terminal-based photo thumbnail display method and system - Google Patents
Mobile terminal-based photo thumbnail display method and system Download PDFInfo
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- CN106528639A CN106528639A CN201610893101.5A CN201610893101A CN106528639A CN 106528639 A CN106528639 A CN 106528639A CN 201610893101 A CN201610893101 A CN 201610893101A CN 106528639 A CN106528639 A CN 106528639A
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- G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses a mobile terminal-based photo thumbnail display method and system. The method comprises the steps of A, when it is detected that a user performs photographing, obtaining focus coordinates, converting the focus coordinates into cropping parameters in thumbnails, and storing the cropping parameters and the thumbnails together; and B, when photos are previewed, obtaining the cropping parameters of the thumbnails corresponding to the photos, and controlling the cropping parameters to be displayed during previewing. According to the method and the system, useful region images are not clipped during picture cropping before the thumbnails are displayed, so that the influence on the display effect of the photo thumbnails due to the fact that the position of a focus is clipped can be effectively avoided, the photo cropping position is proper, and the convenience is provided for users.
Description
Technical field
The present invention relates to technical field of mobile terminals, more particularly to a kind of photograph thumbnail based on mobile terminal is aobvious
Show method and system.
Background technology
It is one of the most frequently used function to carry out taking pictures using mobile terminal, by prior art, meeting while photograph is shot
Thumbnail file is generated, is then then shown when user carries out photograph preview the thumbnail of photograph to accelerate display speed.
So-called thumbnail, is picture of the former photograph through reduction operation, and its display content is suitable with artwork piece, but definition, display
Details has lost, and system loads thumbnail is significantly faster than loading figure photograph Just because of this.
As each photograph Aspect Ratio has differences the difference that therefore its thumbnail there is also Aspect Ratio, and photograph preview
When for queueing discipline, can be shown after each thumbnail is cut out again, cut out mode and go to upper and lower or left and right part to protect for cutting out
Mid portion is stayed to make each thumbnail size all same；As shown in figure 1, there are three hypertonic sketch map A, B, C, between them, there is length-width ratio
The difference of example, A are standard size, therefore without the need for processing during photograph preview display, and B and C is both needed to carry out dash area in figure
Cutting is adapting to standard size and can just carry out preview show；Will be tailored when the focus in picture is located in shade, shadow
The effect of photograph preview is rung, is for example a personage in thumbnail, the head of the personage is located in dash area, now photograph preview
When be shown as personage without a head, have a strong impact on the effect of photograph preview.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of based on mobile whole
The photograph method for viewing thumbnail at end and system.It is intended to avoid that focus position is cropped falls to affect photograph thumbnail to show effect
Really, provide users with the convenient.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of photograph method for viewing thumbnail based on mobile terminal, wherein, including：
Step A, when detecting user and taking pictures, obtains focal coordinates and is converted to the focal coordinates and cut out ginseng in thumbnail
Number, the parameter of cutting out is stored together with thumbnail；
Step B, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter, and control cuts out parameter in preview
Show.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step A is specifically included：
A1, detects user and takes pictures, the focus that acquisition is focused when taking pictures；
A2, if the size of clapped photograph is a*b, focal position is determined during focusing by when shooting photograph, if focus is located at photograph
In coordinate be（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/a, d1=b1*d/b；
A3, will cut out parameter and store together with thumbnail.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B11, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B12, obtain preview size be set to e*f, if c1 be less than or equal to e, and d1 be less than or equal to f, then by thumbnail with（0,
0）、（E, f）The rectangle part of 2 points of determinations is shown as preview.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B21, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B22, obtain preview size be set to e*f, if c-e≤c1 and d1≤f, by thumbnail with（c-e,0）、（C, d-f）
The rectangle part of 2 points of determinations is shown as preview.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B31, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B32, obtain preview size be set to e*f, if c-e≤c1 and d-f≤d1, by thumbnail with（c-e,d-f）、（C,
d）The rectangle part of 2 points of determinations is shown as preview.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B41, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B42, obtain preview size be set to e*f, if c1≤e and d-f≤d1, by thumbnail with（0,d-f）、（E, d）Two
The rectangle part that point determines is shown as preview.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B51, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B52, obtains preview size and is set to e*f, if e<c1<C-e and d1≤f, then by thumbnail with（c1-e/2,0）、（c1
+ e/2, f）The rectangle part of 2 points of determinations is shown as preview.
The photograph method for viewing thumbnail based on mobile terminal, wherein, step B is specifically included：
B61, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B62, obtains preview size and is set to e*f, if c-e≤c1 and f<d1<D-f, then by thumbnail with（c-e,d1-f/
2）、（C, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
If e<c1<C-e and d-f≤d1, then by thumbnail with（c1-e/2,d-f）、（C1+e/2, d）The square of 2 points of determinations
Shape part is shown as preview；
If c1≤e and f<d1<D-f, then by thumbnail with（0,d1-f/2）、（E, d1+f/2）The rectangular portion of 2 points of determinations
It is allocated as showing for preview；
If e<c1<C-e and f<d1<D-f, then by thumbnail with（c1-e/2,d1-f/2）、（C1+e/2, d1+f/2）2 points
It is determined that rectangle part show as preview.
A kind of photograph thumbnail display system based on mobile terminal, wherein, including：
The focal coordinates are converted to breviary for when detecting user and taking pictures, obtaining focal coordinates by detection and memory module
Parameter is cut out in figure, the parameter of cutting out is stored together with thumbnail；
Preview control module, cuts out parameter for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph, and ginseng is cut out in control
Number is shown in preview.
The photograph thumbnail display system based on mobile terminal, wherein,
Detection is included with memory module：
Detector unit, takes pictures for detecting user, the focus that acquisition is focused when taking pictures；
Setting unit, for setting the size of clapped photograph as a*b, focal position is determined during focusing by when shooting photograph, if burnt
Putting the coordinate being located in photograph is（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/a, d1
=b1*d/b；
Memory element, is stored together with thumbnail for cutting out parameter
Preview control module includes：
Parameter acquiring unit is cut out, and parameter is cut out for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph；
First preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e, and d1 is less than or equal to f, then
By in thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；
Second preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e and d1 is less than or equal to f,
By in thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；
3rd preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d1≤f, by thumbnail
With（c-e,0）、（C, d-f）The rectangle part of 2 points of determinations is shown as preview；
4th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d-f≤d1, by thumbnail
In with（c-e,d-f）、（C, d）The rectangle part of 2 points of determinations is shown as preview；
5th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and d-f≤d1, by thumbnail
With（0,d-f）、（E, d）The rectangle part of 2 points of determinations is shown as preview；
6th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d1≤f, then by thumbnail
In with（c1-e/2,0）、（C1+e/2, f）The rectangle part of 2 points of determinations is shown as preview；
7th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and f<d1<D-f, then by breviary
In figure with（c-e,d1-f/2）、（C, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
8th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d-f≤d1, then by breviary
In figure with（c1-e/2,d-f）、（C1+e/2, d）The rectangle part of 2 points of determinations is shown as preview;
9th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and f<d1<D-f, then by thumbnail
In with（0,d1-f/2）、（E, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
Tenth preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and f<d1<D-f, then by breviary
In figure with（c1-e/2,d1-f/2）、（C1+e/2, d1+f/2）The rectangle part of 2 points of determinations is shown as preview.
Photograph method for viewing thumbnail and system based on mobile terminal provided by the present invention, method of the present invention breviary
Figure show front picture cutting will not the useful area image of cutting, can be prevented effectively from that focus position is cropped to be fallen to affect photograph
Thumbnail display effect, makes photo cutting position suitable, provides users with the convenient.
Description of the drawings
Fig. 1 is the structural representation of the photograph method for viewing thumbnail of prior art.
Fig. 2 is flow chart of the present invention based on the preferred embodiment of the photograph method for viewing thumbnail of mobile terminal.
Fig. 3 to Figure 12 is picture contracting of the present invention based on the preferred embodiment of the photograph method for viewing thumbnail of mobile terminal
Omit cutting structural representation.
Figure 13 is principle of work and power frame of the present invention based on the preferred embodiment of the photograph thumbnail display system of mobile terminal
Figure.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is only to explain the present invention, and without
It is of the invention in limiting.
Fig. 1 is referred to, Fig. 1 is stream of the present invention based on the preferred embodiment of the photograph method for viewing thumbnail of mobile terminal
Cheng Tu.As shown in figure 1, a kind of photograph method for viewing thumbnail described in the embodiment of the present invention, comprises the following steps：
Step S100, when detecting user and taking pictures, obtains focal coordinates and the focal coordinates is converted to cutting out in thumbnail
Parameter, the parameter of cutting out is stored together with thumbnail；
Step S200, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter, and control cuts out parameter in preview
When show.
In the embodiment of the present invention, step S100 is specifically included：
A1, detects user and takes pictures, the focus that acquisition is focused when taking pictures；
A2, if the size of clapped photograph is a*b, focal position is determined during focusing by when shooting photograph, if focus is located at photograph
In coordinate be（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/a, d1=b1*d/b；See
Fig. 3；
A3, will cut out parameter and store together with thumbnail.
In the embodiment of the present invention, further, the photograph method for viewing thumbnail, wherein, step S200 is concrete
Including：
B1, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B2, obtains preview size and is set to e*f, and then a point situations below is processed：
B31, such as Fig. 4, if c1 be less than or equal to e, and d1 be less than or equal to f, then by thumbnail with（0,0）、（E, f）2 points of determinations
Rectangle part show as preview.For example：(c1,d1)=(200,100),(c,d)=(600,400),(e,f)=(300,
200)
B32, such as Fig. 5, if c-e≤c1 and d1≤f, by thumbnail with（c-e,0）、（C, d-f）The rectangle of 2 points of determinations
Part is shown as preview.For example, (c1, d1)=(500,100), (c, d)=(600,400), (e, f)=(300,200).
B33, such as Fig. 6, if c-e≤c1 and d-f≤d1, by thumbnail with（c-e,d-f）、（C, d）2 points of determinations
Rectangle part show as preview.For example, (c1, d1)=(500,300), (c, d)=(600,400), (e, f)=(300,
200)。
B34, such as Fig. 7, if c1≤e and d-f≤d1, by thumbnail with（0,d-f）、（E, d）The square of 2 points of determinations
Shape part is shown as preview.For example, (c1, d1)=(100,300), (c, d)=(600,400), (e, f)=(300,
200)。
B35, such as Fig. 8, if e<c1<C-e and d1≤f, then by thumbnail with（c1-e/2,0）、（C1+e/2, f）Two
The rectangle part that point determines is shown as preview.For example, (c1, d1)=(300,100), (c, d)=(600,400), (e, f)
=(300,200)。
B36, such as Fig. 9, if c-e≤c1 and f<d1<D-f, then by thumbnail with（c-e,d1-f/2）、（C, d1+f/
2）The rectangle part of 2 points of determinations is shown as preview.For example, (c1, d1)=(500,200), (c, d)=(600,400),
(e,f)=(300,200)。
B37, such as Figure 10, if e<c1<C-e and d-f≤d1, then by thumbnail with（c1-e/2,d-f）、（C1+e/2,
d）The rectangle part of 2 points of determinations is shown as preview.For example, (c1, d1)=(300,300), (c, d)=(600,400),
(e,f)=(300,200)。
B38, such as Figure 11, if c1≤e and f<d1<D-f, then by thumbnail with（0,d1-f/2）、（E, d1+f/2）Two
The rectangle part that point determines is shown as preview.For example, (c1, d1)=(100,200), (c, d)=(600,400), (e, f)
=(300,200)。
B39, such as Figure 12, if e<c1<C-e and f<d1<D-f, then by thumbnail with（c1-e/2,d1-f/2）、（c1+
E/2, d1+f/2）The rectangle part of 2 points of determinations is shown as preview.For example, (c1, d1)=(300,200), (c, d)=
(600,400),(e,f)=(300,200)。
Therefore, the present invention provides a kind of photograph method for viewing thumbnail based on mobile terminal.It is intended to avoid focus
Position is cropped to be fallen to affect photograph thumbnail display effect, provides users with the convenient.
Based on said method embodiment, present invention also offers a kind of photograph thumbnail based on mobile terminal shows system
System, as shown in figure 13, the system includes：
The focal coordinates are converted to contracting for when detecting user and taking pictures, obtaining focal coordinates by detection and memory module 210
Parameter is cut out in sketch map, the parameter of cutting out is stored together with thumbnail；As detailed above.
Preview control module 220, cuts out parameter for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph, controls
System is cut out parameter and is shown in preview；As detailed above.
The photograph thumbnail display system based on mobile terminal, wherein,
Detection is included with memory module：
Detector unit, takes pictures for detecting user, the focus that acquisition is focused when taking pictures；As detailed above.
Setting unit, for setting the size of clapped photograph as a*b, focal position is determined during focusing by when shooting photograph,
If the coordinate that focus is located in photograph is（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/
A, d1=b1*d/b；As detailed above.
Memory element, is stored together with thumbnail for cutting out parameter；As detailed above.
Preview control module includes：
Parameter acquiring unit is cut out, and parameter is cut out for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph；Specifically as above
It is described.
First preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e, and d1 is less than or equal to
F, then by thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
Second preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e and d1 is less than or equal to
F, then by thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
3rd preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d1≤f, by breviary
In figure with（c-e,0）、（C, d-f）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
4th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d-f≤d1, will contracting
In sketch map with（c-e,d-f）、（C, d）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
5th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and d-f≤d1, by breviary
In figure with（0,d-f）、（E, d）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
6th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d1≤f, then will contracting
In sketch map with（c1-e/2,0）、（C1+e/2, f）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
7th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and f<d1<D-f, then will
In thumbnail with（c-e,d1-f/2）、（C, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；Specifically as above
It is described.
8th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d-f≤d1, then will
In thumbnail with（c1-e/2,d-f）、（C1+e/2, d）The rectangle part of 2 points of determinations is shown as preview；Specifically as above
It is described.
9th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and f<d1<D-f, then will contracting
In sketch map with（0,d1-f/2）、（E, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；As detailed above.
Tenth preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and f<d1<D-f, then will
In thumbnail with（c1-e/2,d1-f/2）、（C1+e/2, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
As detailed above.
In sum, the photograph method for viewing thumbnail and system based on mobile terminal provided by the present invention, the present invention
Method thumbnail show before picture cutting will not the useful area image of cutting, focus position can be prevented effectively from cropped
Fall to affect photograph thumbnail display effect, make photo cutting position suitable, provide users with the convenient.
Certainly, one of ordinary skill in the art will appreciate that all or part of flow process in realizing above-described embodiment method,
Can be by computer program to instruct related hardware（Such as processor, controller etc.）To complete, described program can be stored
In the storage medium of an embodied on computer readable, the program is may include upon execution such as the flow process of above-mentioned each method embodiment.Its
Described in storage medium can be for memorizer, magnetic disc, CD etc..
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can
To be improved according to the above description or be converted, all these modifications and variations should all belong to the guarantor of claims of the present invention
Shield scope.
Claims (10)
1. a kind of photograph method for viewing thumbnail based on mobile terminal, it is characterised in that include：
Step A, when detecting user and taking pictures, obtains focal coordinates and is converted to the focal coordinates and cut out ginseng in thumbnail
Number, the parameter of cutting out is stored together with thumbnail；
Step B, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter, and control cuts out parameter in preview
Show.
2. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step A
Specifically include：
A1, detects user and takes pictures, the focus that acquisition is focused when taking pictures；
A2, if the size of clapped photograph is a*b, focal position is determined during focusing by when shooting photograph, if focus is located at photograph
In coordinate be（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/a, d1=b1*d/b；
A3, will cut out parameter and store together with thumbnail.
3. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B11, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B12, obtain preview size be set to e*f, if c1 be less than or equal to e, and d1 be less than or equal to f, then by thumbnail with（0,
0）、（E, f）The rectangle part of 2 points of determinations is shown as preview.
4. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B21, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B22, obtain preview size be set to e*f, if c-e≤c1 and d1≤f, by thumbnail with（c-e,0）、（C, d-f）
The rectangle part of 2 points of determinations is shown as preview.
5. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B31, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B32, obtain preview size be set to e*f, if c-e≤c1 and d-f≤d1, by thumbnail with（c-e,d-f）、（C,
d）The rectangle part of 2 points of determinations is shown as preview.
6. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B41, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B42, obtain preview size be set to e*f, if c1≤e and d-f≤d1, by thumbnail with（0,d-f）、（E, d）Two
The rectangle part that point determines is shown as preview.
7. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B51, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B52, obtains preview size and is set to e*f, if e<c1<C-e and d1≤f, then by thumbnail with（c1-e/2,0）、（c1
+ e/2, f）The rectangle part of 2 points of determinations is shown as preview.
8. photograph method for viewing thumbnail according to claim 1 based on mobile terminal, it is characterised in that step B
Specifically include：
B61, when photograph preview is carried out, obtains the corresponding thumbnail of photograph and cuts out parameter；
B62, obtains preview size and is set to e*f, if c-e≤c1 and f<d1<D-f, then by thumbnail with（c-e,d1-f/
2）、（C, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
If e<c1<C-e and d-f≤d1, then by thumbnail with（c1-e/2,d-f）、（C1+e/2, d）The square of 2 points of determinations
Shape part is shown as preview；
If c1≤e and f<d1<D-f, then by thumbnail with（0,d1-f/2）、（E, d1+f/2）The rectangular portion of 2 points of determinations
It is allocated as showing for preview；
If e<c1<C-e and f<d1<D-f, then by thumbnail with（c1-e/2,d1-f/2）、（C1+e/2, d1+f/2）2 points
It is determined that rectangle part show as preview.
9. a kind of photograph thumbnail display system based on mobile terminal, it is characterised in that include：
The focal coordinates are converted to breviary for when detecting user and taking pictures, obtaining focal coordinates by detection and memory module
Parameter is cut out in figure, the parameter of cutting out is stored together with thumbnail；
Preview control module, cuts out parameter for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph, and ginseng is cut out in control
Number is shown in preview.
10. photograph thumbnail display system according to claim 9 based on mobile terminal, it is characterised in that
Detection is included with memory module：
Detector unit, takes pictures for detecting user, the focus that acquisition is focused when taking pictures；
Setting unit, for setting the size of clapped photograph as a*b, focal position is determined during focusing by when shooting photograph, if burnt
Putting the coordinate being located in photograph is（a1,b1）If thumbnail dimensions are c*d, then parameter (c1, d1) is cut out for c1=a1*c/a, d1
=b1*d/b；
Memory element, is stored together with thumbnail for cutting out parameter；
Preview control module includes：
Parameter acquiring unit is cut out, and parameter is cut out for when photograph preview is carried out, obtaining the corresponding thumbnail of photograph；
First preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e, and d1 is less than or equal to f, then
By in thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；
Second preview processing unit, is set to e*f for obtaining preview size, if c1 is less than or equal to e and d1 is less than or equal to f,
By in thumbnail with（0,0）、（E, f）The rectangle part of 2 points of determinations is shown as preview；
3rd preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d1≤f, by thumbnail
With（c-e,0）、（C, d-f）The rectangle part of 2 points of determinations is shown as preview；
4th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and d-f≤d1, by thumbnail
In with（c-e,d-f）、（C, d）The rectangle part of 2 points of determinations is shown as preview；
5th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and d-f≤d1, by thumbnail
With（0,d-f）、（E, d）The rectangle part of 2 points of determinations is shown as preview；
6th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d1≤f, then by thumbnail
In with（c1-e/2,0）、（C1+e/2, f）The rectangle part of 2 points of determinations is shown as preview；
7th preview processing unit, is set to e*f for obtaining preview size, if c-e≤c1 and f<d1<D-f, then by breviary
In figure with（c-e,d1-f/2）、（C, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
8th preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and d-f≤d1, then by breviary
In figure with（c1-e/2,d-f）、（C1+e/2, d）The rectangle part of 2 points of determinations is shown as preview;
9th preview processing unit, is set to e*f for obtaining preview size, if c1≤e and f<d1<D-f, then by thumbnail
In with（0,d1-f/2）、（E, d1+f/2）The rectangle part of 2 points of determinations is shown as preview；
Tenth preview processing unit, is set to e*f for obtaining preview size, if e<c1<C-e and f<d1<D-f, then by breviary
In figure with（c1-e/2,d1-f/2）、（C1+e/2, d1+f/2）The rectangle part of 2 points of determinations is shown as preview.
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| CN109389659A (en) * | 2018-09-11 | 2019-02-26 | 广州视源电子科技股份有限公司 | The rendering method of mathematical formulae, device, storage medium and terminal device in PPT |
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