CN106657771A - PowerPoint data processing method and mobile terminal - Google Patents
PowerPoint data processing method and mobile terminal Download PDFInfo
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- CN106657771A CN106657771A CN201611021762.5A CN201611021762A CN106657771A CN 106657771 A CN106657771 A CN 106657771A CN 201611021762 A CN201611021762 A CN 201611021762A CN 106657771 A CN106657771 A CN 106657771A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/22—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
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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
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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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
- H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
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Abstract
The invention provides a PowerPoint (PPT) data processing method and a mobile terminal. The method comprises the following steps: opening the camera mode of a mobile terminal; judging whether there is a PPT area in a picture captured in the camera mode, and automatically shooting the captured picture if there is a PPT area in the picture, wherein the PPT area is an area for presenting PPT content. Through the method, a currently captured picture can be shot automatically. Therefore, the mobile terminal can shoot PPT content automatically, and the user experience in PPT image taking is improved greatly.
Description
Technical field
The present invention relates to image processing techniques, more particularly to a kind of PowerPoint data processing method and mobile terminal.
Background technology
With the development of multimedia technology, in many trainings or meeting, speaker is generally using multimedia mode to ginseng
Conference content is explained with person.Specifically, speaker is by the PowerPoint software playing demonstration document in computer, i.e. PPT is (complete
Claim PowerPoint), PPT can be projected to specific region and be watched for participant by the projecting apparatus being connected with computer simultaneously.Participate in
Person can be got off PPT content records by various modes, and traditional mode for example can be the mode of notes, and with movement
The continuous development of terminal technology, increasing participant is selected the PPT contents for being projected using the camera in mobile terminal
It is filmed and supplies subsequent reference.
In prior art, when PPT is updated to new page, participant shoots manually PPT contents using camera.
That is, in PPT playing process, participant needs to manually perform multiple shooting operation to shoot PPT contents.
But, user constantly shoots manually PPT contents, can make troubles to user, affects the experience of user.
The content of the invention
The present invention provides a kind of PowerPoint data processing method and mobile terminal, for solving prior art in need to use
Family shoots manually the problem of the impact Consumer's Experience caused by PPT contents.
First aspect present invention provides a kind of PowerPoint data processing method, and the method includes：
Open the image pickup mode in mobile terminal；
Judge in the picture captured under the image pickup mode with the presence or absence of PowerPoint PPT regions, if so, then automatically snap
The picture of the capture；Wherein, the PPT regions are the region that PPT contents are presented.
Second aspect present invention provides a kind of mobile terminal, including：
Opening module, for opening mobile terminal in image pickup mode；
Processing module, for judging the image pickup mode under capture picture in whether there is PowerPoint PPT regions, if
It is then to automatically snap the picture of the capture；
Wherein, the PPT regions are the region that PPT contents are presented.
PowerPoint data processing method provided by the present invention and mobile terminal, mobile terminal open image pickup mode it
Afterwards, judge, with the presence or absence of PPT regions in the picture that camera is currently captured, if existing, to automatically snap the picture for currently being captured
Face, it is achieved thereby that automatically snapping PPT contents by mobile terminal, greatly improves the experience that user shoots PPT photos.
Description of the drawings
In order to be illustrated more clearly that technical scheme of the invention or of the prior art, below will be to embodiment or prior art
The accompanying drawing to be used needed for description is briefly described, it should be apparent that, drawings in the following description are the one of the present invention
A little embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with according to this
A little accompanying drawings obtain other accompanying drawings.
The schematic flow sheet of the PowerPoint data processing method embodiment one that Fig. 1 is provided for the present invention；
The schematic flow sheet of the PowerPoint data processing method embodiment two that Fig. 2 is provided for the present invention；
The schematic flow sheet of the PowerPoint data processing method embodiment three that Fig. 3 is provided for the present invention；
The schematic flow sheet of the PowerPoint data processing method example IV that Fig. 4 is provided for the present invention；
The function structure chart of the mobile terminal embodiment one that Fig. 5 is provided for the present invention；
The function structure chart of the mobile terminal embodiment two that Fig. 6 is provided for the present invention；
The function structure chart of the mobile terminal embodiment three that Fig. 7 is provided for the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention in it is attached
Figure, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is the present invention
A part of embodiment, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, the scope of protection of the invention is belonged to.
It should be noted that the executive agent of this method is the mobile terminal with camera or camera function, such as mobile phone,
Panel computer etc..The PPT data processing methods of the present invention can in the terminal be run in the form of application program, for example, should
Application program can be used as a kind of additional modes of camera in mobile terminal, and user can select to open the Attachment schema, also may be used
To select to be not turned on the additional modes.
The schematic flow sheet of the PowerPoint data processing method embodiment one that Fig. 1 is provided for the present invention, should be such as Fig. 1 institutes
Show, the method includes：
S101, the image pickup mode opened in mobile terminal.
Alternatively, user can directly open the camera in mobile terminal, or, it is also possible to opened by other application and moved
Camera in dynamic terminal, you can to open image pickup mode in several ways.
Below so that user directly opens the camera in mobile terminal as an example illustrating.
When user clicks on the camera icon in mobile terminal, then mobile to open camera eventually, camera enters preview state.Camera
Into after preview state, user can manually select the present mode of camera, such as panning mode, burst mode, night mould
Formula etc..In the present embodiment, user can select PPT patterns, wherein, PPT patterns are used to automatically snap PPT contents by camera.
After user selects a kind of pattern, the present mode of camera is defined as the selected pattern of user by mobile terminal.
In another kind of optional mode, mobile terminal can with currently captured according to camera picture the characteristics of from
The dynamic present mode for determining camera.For example, correspondence PPT patterns, mobile terminal by being in the picture for judging the current capture of camera
It is no to there is PPT regions to determine whether present mode is PPT patterns, wherein, judge whether deposited in the picture that camera is currently captured
Concrete grammar in PPT regions will be introduced in greater detail below.
S102, judge in the picture captured under image pickup mode with the presence or absence of PPT regions, if so, then perform S103.Otherwise,
Then processed according to the mode of prior art, here is omitted.
S103, the picture of automatic shooting capture.
Wherein, above-mentioned PPT regions are the region that PPT contents are presented.
Specifically, after the present mode for determining camera, if it is judged that present mode is PPT patterns, then move
Terminal is presented the region of PPT contents firstly the need of judging in the picture that camera is captured with the presence or absence of PPT regions, mobile
Terminal for example can recognize PPT regions according to the difference in the brightness in PPT regions and other regions, contrast.In PPT data
In the case of including multiple pages, mobile terminal can be according to the picture T1 of the current capture and previous picture T0 of the picture of capture
Difference come determine whether shoot capture picture T1.It should be noted that camera is in capturing visual, it is to be caught frame by frame
Obtain, therefore, the picture that camera is captured is referred to when former frame picture, and the previous picture of the picture of capture refers to previous frame picture.
If it should be noted that the picture of capture is moved by the first frame picture captured after image pickup mode startup
Terminal will not carry out diversity judgement, but directly shoot the picture of capture.
Mobile terminal introduced below determines whether according to the picture of capture with the difference of the previous picture of the picture of capture
A kind of optional mode of the picture of automatic shooting capture.
First, RGB image is converted into gray level image and is gone forward side by side column hisgram normalized by mobile terminal.
Mobile terminal is separately converted to the corresponding RGB image of the picture of capture and the corresponding RGB image of previous picture
Gray level image is gone forward side by side column hisgram normalized.
Secondly, mobile terminal calculates the gray level image and previous picture corresponding to the picture of capture using equation below (1)
The coefficient correlation of the gray level image corresponding to face：
In formula (1), img_1 and img_2 represents respectively the gray level image corresponding to the picture of capture and previous picture
Gray level image corresponding to face, D (img_1) and D (img_2) represent respectively the gray level image corresponding to the picture of capture and front
The variance of the gray level image corresponding to one picture, cov (img_1, img_2) represents the covariance of image img_1 and img_2.
ρimg_diffValue be 0～1, closer to 1, then illustrate that the similarity of the picture and previous picture for capturing is higher.Mobile terminal can be with
Judge ρimg_diffThe picture for shooting capture is determined whether with the relation of predetermined threshold value, if ρimg_diffMore than predetermined threshold value, say
The picture of bright capture is very high with the similarity of previous picture, then mobile terminal can consider that PPT contents do not change, then not
The picture of capture is shot, if ρimg_diffLess than or equal to predetermined threshold value, the similarity of the picture and previous picture for capturing is illustrated not
Height, then terminal can consider that PPT contents change, then shoot the picture of capture.
In the present embodiment, whether mobile terminal judges in the picture that camera is currently captured after image pickup mode is opened
There is PPT regions, if existing, the picture for currently being captured can be automatically snapped, it is achieved thereby that being clapped automatically by mobile terminal
PPT contents are taken the photograph, experience during user shooting PPT is greatly improved.
Alternatively, after there is PPT regions during mobile terminal judges the picture that camera is currently captured, can be by certainly
The modes such as the scaling of dynamic adjustment picture to cause the picture for capturing in only show PPT regions, and then shoot the picture of capture,
So that it is captured go out picture in only show PPT contents.
On the basis of above-described embodiment, the present embodiment is related to the concrete grammar that mobile terminal judges PPT regions, i.e. Fig. 2
The schematic flow sheet of the PowerPoint data processing method embodiment two provided for the present invention, as shown in Fig. 2 mobile terminal judges
It is with the presence or absence of a kind of concrete mode in PPT regions in the picture captured under image pickup mode：
S201, the picture to capturing carry out reduction resolution processes using parameter preset, and the picture for obtaining capture is corresponding
Predetermined resolution picture.
Specifically, it is assumed that the picture size of capture is M*N, first, whole picture is divided intoIndividual block, i.e., each
It is 16*16 that the size of block is 16*16, i.e. parameter preset.Secondly, each block to being divided takes average pixel value, and will be average
The corresponding pixel of pixel value replaces this block region, then picture size is reduced for
In this step, reduction resolution processes are carried out by the picture to capturing so that the complexity drop of the picture of capture
It is low, so as to improve arithmetic speed, it is ensured that the real-time of PPT content imagings.
S202, determine the clear zone in predetermined resolution picture with the differentiation luminance threshold in non-clear zone.
Wherein, above-mentioned differentiation luminance threshold represents the brightness cut off value in clear zone and non-clear zone in predetermined resolution picture.Example
Such as, it is assumed that it is 120 to distinguish luminance threshold, if then the brightness of certain pixel is 150, i.e., more than 120, then illustrates the pixel
For a pixel in clear zone, if the brightness of certain pixel is 100, i.e., less than 120, then illustrate that the pixel is non-clear zone
A pixel.
Alternatively, mobile terminal can determine that the clear zone in predetermined resolution picture is bright with non-by maximum kind differences method
The differentiation luminance threshold in area.The variance that the method passes through clear zone and non-clear zone corresponding to each luminance threshold in calculating 0～255
Value, finally to determine above-mentioned differentiation luminance threshold.
S203, according to above-mentioned differentiation luminance threshold, it is determined that capture picture in whether there is PPT regions.
As it was previously stated, distinguishing luminance threshold represents clear zone and the brightness cut off value in non-clear zone in predetermined resolution picture, enter
And, terminal by the way that the brightness value of each pixel in predetermined resolution picture and the differentiation luminance threshold are compared, just
May determine that and whether there is in the picture of capture PPT regions.
The schematic flow sheet of the PowerPoint data processing method embodiment three that Fig. 3 is provided for the present invention, as shown in figure 3,
A kind of optional embodiment of above-mentioned S203 is：
S301, according to distinguish luminance threshold, using preset algorithm determine capture picture in brightness more than distinguish luminance threshold
The continuum that the pixel of value is formed, wherein, preset algorithm includes algorithm of region growing.
Specifically, for the specific pixel point in the picture of capture, first determine whether its brightness value with above-mentioned differentiation luminance threshold
The relation of value, if its brightness value is more than above-mentioned differentiation luminance threshold, and then, using zone algorithm brightness value is obtained more than differentiation
The continuum that the pixel of luminance threshold is formed.It should be noted that the present invention is except adopting algorithm of region growing
Outside, other algorithms for being suitable to calculate continuum can also be adopted.
The number of pixels of S302, the original position, end position and continuum of acquisition continuum.
Algorithm of region growing is it is determined that during continuum, can automatically calculate original position, the stop bits of continuum
Put and continuum number of pixels.Wherein, original position, end position represent respectively coordinate and the end of original position
The coordinate of position.
S303, according to the original position and end position of continuum, calculate the corresponding predetermined shape in continuum
Number of pixels in region, wherein, the predetermined shape includes rectangle.
Assume that the corresponding coordinate value of original position is (x1,y1), the corresponding coordinate value of end position is (x2,y2), then continuously
Number of pixels pixRect in the corresponding rectangular area in region can be calculated using following formula (2)：
pixRect≈(x2-x1)*(y2-y1) (2)
S304, judge whether the difference of number of pixels of number of pixels in the region of predetermined shape and continuum is less than
Preset value, if so, then performs S305.Otherwise perform S306.
There is PPT regions in S305, the picture of determination capture.
There is no PPT regions in S306, the picture of determination capture.
Wherein, the number of pixels of the corresponding rectangular area in continuum for being calculated mobile terminal in the present embodiment
PixRect is used as benchmark, if the actual pixels number of continuum is less than with the difference of the rectangular area number of pixels preset
Value, i.e., very close to rectangular area number of pixels, then can determine that the continuum is rectangle, that is, determine that brightness is bright more than distinguishing
The rectangular area of degree threshold value, it is clear that the feature in the region meets the feature in PPT regions, and mobile terminal further determines that the region is
PPT regions.
Because the present embodiment is that, for judging PPT regions, and obvious, in PPT presentation process, the brightness in PPT regions will
The brightness in other regions in the picture captured apparently higher than camera, meanwhile, PPT regions are rectangular area, therefore, the present embodiment
Whether it is rectangle by the shape for distinguishing luminance threshold and continuum, it is possible to the PPT regions being accurately judged in picture.
The schematic flow sheet of the PowerPoint data processing method example IV that Fig. 4 is provided for the present invention, as shown in figure 4,
That is, exist after PPT regions in mobile terminal determines that the corresponding picture in continuum is the picture for capturing, also include：
S401, by the corresponding picture in continuum be defined as capture picture in PPT regions.
S402, according to capture picture in PPT regions brightness, adjust capture picture exposure parameter, wherein, institute
Stating exposure parameter includes exposure row and/or exposure gain.
Specifically, after PPT regions of the mobile terminal in the picture for determining capture, you can in getting PPT regions
The brightness value of each pixel, mobile terminal can be using the mean value of the brightness value of all pixels point in PPT regions as PPT areas
The brightness value in domain.Further, according to the particular luminance value in PPT regions, the exposure parameter of the picture of capture is adjusted, wherein, exposure ginseng
Number can include exposure row and/or exposure gain.I.e. different brightness values can correspond to different exposure parameters, and mobile terminal can
To pre-set the mapping relations between brightness value and exposure parameter.It is pointed out that people in the art can also be adopted
The exposure parameter of picture of known other algorithms of member to capturing is adjusted.
By adjustment exposure row and/or exposure gain so that the definition and contrast in the PPT regions in the picture of capture
It is greatly improved, i.e. the photographing request under PPT photographed scenes is disclosure satisfy that by adjustment exposure row and/or exposure gain, is made
The display effect for obtaining PPT contents captured under PPT photographed scenes reaches most preferably.
Alternatively, the mapping relations between brightness value and exposure parameter can be obtained beforehand through the mode of debugging, example
Such as, by specific debugging acid, can obtain enabling to the best exposure parameter of display effect under PPT patterns.
In another embodiment, whether there is in the picture that mobile terminal is captured in the case where image pickup mode is judged before PPT regions,
Information is issued the user with first, to prevent mobile terminal from producing shake, wherein, the information is used to remind user to move
Dynamic terminal fixed placement.
Because terminal automatically snaps PPT contents, accordingly, it would be desirable to ensure that mobile terminal is not moved, PPT is just may insure
The smooth shooting of content.Therefore, in the present embodiment, after present mode is identified for PPT patterns, and PPT regions are recognized
Before, mobile terminal reminds first user by terminal fixed placement, so that follow-up PPT shoots can be normally carried out.
On this basis, mobile terminal carries out shaking detection, to be further ensured that being normally carried out for PPT shootings.It is mobile whole
End can detect whether mobile terminal is shaken by obtaining built-in sensing data.
Specifically, if detecting that mobile terminal is shaken, mobile terminal can continue to issue the user with prompting and disappear
Breath, and proceed detection shake according to specific period, if after the predetermined number cycle still there is shake in mobile terminal,
Then mobile terminal can exit PPT patterns.
The function structure chart of the mobile terminal embodiment one that Fig. 5 is provided for the present invention, as shown in figure 4, the mobile terminal bag
Include：
Opening module 501, for opening mobile terminal in image pickup mode.
Processing module 502, for judging image pickup mode under capture picture in whether there is PPT regions, it is if so, then automatic
Shoot the picture of capture.
Wherein, above-mentioned PPT regions are the region that PPT contents are presented.
The mobile terminal is used to realize aforesaid embodiment of the method that it to realize that principle is similar with technique effect, herein no longer
Repeat.
In another embodiment, processing module 502 is judged in the picture captured under image pickup mode with the presence or absence of PowerPoint PPT
Region may include：
Picture to capturing carries out reduction resolution processes using parameter preset, obtains the predetermined resolution of the picture of capture
Picture；Determine the differentiation luminance threshold in the clear zone in predetermined resolution picture and non-clear zone；According to luminance threshold is distinguished, it is determined that catching
Whether there is PPT regions in the picture for obtaining.
In another embodiment, processing module 502 is according to differentiation luminance threshold, it is determined that whether there is PPT in the picture of capture
Region may include：
According to the differentiation luminance threshold, determine that brightness is more than the differentiation in the picture of the capture using preset algorithm
The continuum that the pixel of luminance threshold is formed, wherein, the preset algorithm includes algorithm of region growing；Obtain described continuous
The number of pixels of the original position, end position and the continuum in region；According to the original position of the continuum
And end position, the number of pixels in the region of the corresponding predetermined shape in the continuum is calculated, wherein, the preboarding
Shape includes rectangle；And, judge the number of pixels and the number of pixels of the continuum in the region of the predetermined shape
Whether difference is less than preset value, if, it is determined that there is PPT regions in the picture of the capture.
The function structure chart of the mobile terminal embodiment two that Fig. 6 is provided for the present invention, as shown in fig. 6, also including：
Determining module 503, for the corresponding picture in the continuum to be defined as the picture Zhong PPT areas of the capture
Domain.
Adjusting module 504, for the brightness in the PPT regions in the picture of capture, adjusts the exposure of the picture of capture
Parameter, wherein, exposure parameter includes exposure row and/or exposure gain.
The function structure chart of the mobile terminal embodiment three that Fig. 7 is provided for the present invention, as shown in fig. 7, also including：
Reminding module 505, for issuing the user with information, to prevent the mobile terminal from producing shake, wherein, institute
Information is stated for reminding user by the mobile terminal fixed placement.
Detection module 506, for carrying out shaking detection to mobile terminal.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
Cross the related hardware of programmed instruction to complete.Aforesaid program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And aforesaid storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of PowerPoint data processing method, it is characterised in that be applied to the mobile terminal with camera function, including：
Open the image pickup mode in mobile terminal；
Judge in the picture captured under the image pickup mode with the presence or absence of PowerPoint PPT regions, if so, then automatically snap described
The picture of capture；
Wherein, the PPT regions are the region that PPT contents are presented.
2. method according to claim 1, it is characterised in that be in the picture captured under the judgement image pickup mode
It is no to there is PowerPoint PPT regions, including：
Reduction resolution processes are carried out using parameter preset to the picture of the capture, the predetermined of picture for obtaining the capture divides
Resolution picture；
Determine the differentiation luminance threshold in the clear zone in the predetermined resolution picture and non-clear zone；
According to the differentiation luminance threshold, determine and whether there is in the picture of the capture PPT regions.
3. method according to claim 2, it is characterised in that described according to the differentiation luminance threshold, it is determined that described catch
Whether there is PPT regions in the picture for obtaining, including：
According to the differentiation luminance threshold, determine that brightness is more than the differentiation brightness in the picture of the capture using preset algorithm
The continuum that the pixel of threshold value is formed, wherein, the preset algorithm includes algorithm of region growing；
Obtain the number of pixels of the original position, end position and the continuum of the continuum；
According to the original position and end position of the continuum, the area of the corresponding predetermined shape in the continuum is calculated
Number of pixels in domain, wherein, the predetermined shape includes rectangle；
Judge whether the number of pixels in the region of the predetermined shape is less than with the difference of the number of pixels of the continuum
Preset value, if, it is determined that there is PPT regions in the picture of the capture.
4. method according to claim 3, it is characterised in that also include：
The PPT regions corresponding picture in the continuum being defined as in the picture of the capture；
The brightness in the PPT regions in the picture of the capture, adjusts the exposure parameter of the picture of the capture, wherein, institute
Stating exposure parameter includes exposure row and/or exposure gain.
5. method according to claim 1, it is characterised in that be in the picture captured under the judgement image pickup mode
It is no to exist before PowerPoint PPT regions, also include：
Information is issued the user with, to prevent the mobile terminal from producing shake, wherein, the information is used to remind to be used
Family is by the mobile terminal fixed placement；
Shaking detection is carried out to the mobile terminal.
6. a kind of mobile terminal, it is characterised in that include：
Opening module, for opening mobile terminal in image pickup mode；
Processing module, for judging the image pickup mode under capture picture in whether there is PowerPoint PPT regions, if so,
Then automatically snap the picture of the capture；
Wherein, the PPT regions are the region that PPT contents are presented.
7. mobile terminal according to claim 6, it is characterised in that the processing module judges to be caught under the image pickup mode
Include with the presence or absence of PowerPoint PPT regions in the picture for obtaining：
Reduction resolution processes are carried out using parameter preset to the picture of the capture, the predetermined of picture for obtaining the capture divides
Resolution picture；
Determine the differentiation luminance threshold in the clear zone in the predetermined resolution picture and non-clear zone；
According to the differentiation luminance threshold, determine and whether there is in the picture of the capture PPT regions.
8. mobile terminal according to claim 7, it is characterised in that the processing module is according to the differentiation luminance threshold
Value, determine in the picture of the capture includes with the presence or absence of PPT regions：
According to the differentiation luminance threshold, determine that brightness is more than the differentiation brightness in the picture of the capture using preset algorithm
The continuum that the pixel of threshold value is formed, wherein, the preset algorithm includes algorithm of region growing；
Obtain the number of pixels of the original position, end position and the continuum of the continuum；According to the company
The original position and end position in continuous region, calculates the pixel in the region of the corresponding predetermined shape in the continuum
Number, wherein, the predetermined shape includes rectangle；And,
Judge whether the number of pixels in the region of the predetermined shape is less than with the difference of the number of pixels of the continuum
Preset value, if, it is determined that there is PPT regions in the picture of the capture.
9. mobile terminal according to claim 8, it is characterised in that also include：
Determining module, for the PPT regions being defined as in the corresponding picture in the continuum in the picture of the capture；
Adjusting module, for the brightness in the PPT regions in the picture of the capture, adjusts the exposure of the picture of the capture
Parameter, wherein, the exposure parameter includes exposure row and/or exposure gain.
10. mobile terminal according to claim 6, it is characterised in that also include：
Reminding module, for issuing the user with information, to prevent the mobile terminal from producing shake, wherein, the prompting
Information is used to remind user by the mobile terminal fixed placement；
Detection module, for carrying out shaking detection to the mobile terminal.
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| CN201611021762.5A CN106657771A (en) | 2016-11-21 | 2016-11-21 | PowerPoint data processing method and mobile terminal |
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| CN201611021762.5A CN106657771A (en) | 2016-11-21 | 2016-11-21 | PowerPoint data processing method and mobile terminal |
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| CN107979727A (en) * | 2017-11-30 | 2018-05-01 | 努比亚技术有限公司 | A kind of document image processing method, mobile terminal and computer-readable storage medium |
| WO2019222946A1 (en) * | 2018-05-23 | 2019-11-28 | 华为技术有限公司 | Photographing method and terminal device |
| CN112399065A (en) * | 2019-08-12 | 2021-02-23 | 青岛海信移动通信技术股份有限公司 | Method and equipment for adjusting focal length |
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| WO2019222946A1 (en) * | 2018-05-23 | 2019-11-28 | 华为技术有限公司 | Photographing method and terminal device |
| CN110945863A (en) * | 2018-05-23 | 2020-03-31 | 华为技术有限公司 | Photographing method and terminal equipment |
| CN110945863B (en) * | 2018-05-23 | 2021-05-11 | 华为技术有限公司 | Photographing method and terminal equipment |
| US11409493B2 (en) | 2018-05-23 | 2022-08-09 | Huawei Technologies Co., Ltd. | Photographing method and terminal device |
| US11435975B2 (en) | 2018-05-23 | 2022-09-06 | Huawei Technologies Co., Ltd. | Preview display method based on multi-angle and communication system |
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