CN106161967A

CN106161967A - A kind of backlight scene panorama shooting method and mobile terminal

Info

Publication number: CN106161967A
Application number: CN201610821714.8A
Authority: CN
Inventors: 胡鹏翔
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2016-11-23
Anticipated expiration: 2036-09-13
Also published as: CN106161967B

Abstract

The invention provides a kind of backlight scene panorama shooting method and mobile terminal, wherein method includes: receive pan-shot instruction；The each frame initial preview image gathered for photographic head, whether the photographed scene detecting this frame initial preview image is backlight scene；When the photographed scene of initial preview image is backlight scene, initial preview image is carried out HDR process, generate middle preview image；The all initial preview images being under non-backlight scene and the treated middle preview image that are gathered by photographic head carry out image mosaic according to the sequencing gathered, and generate target panoramic picture.Each two field picture under backlight scene is carried out HDR process by the embodiment of the present invention, then the image after processing splices according to the sequencing gathered with the initial preview image being under non-backlight scene, be there is not the panoramic picture of high intensity range exposure, make details bright, dark place the most high-visible, improve pan-shot effect.

Description

A kind of backlight scene panorama shooting method and mobile terminal

Technical field

The present invention relates to communication technical field, particularly relate to a kind of backlight scene panorama shooting method and mobile terminal.

Background technology

Current panorama mosaic method, is typically all and simply splices picture, but if special at some Scene, under the most relatively dark situation, backlight scene, if being also by the synthesis of simple picture, then the panoramic pictures effect obtained Fruit can be greatly reduced.If dark situation, then distant view photograph entirety all can ratio dark；If backlight scene, then distant view photograph Will be that dark place is the darkest, bright place be the brightest.At present when pan-shot is under dark situation, can enter carrying out highlighting, after denoising Row panorama mosaic.

But current technology cannot solve to carry out under backlight scene the situation of pan-shot.Clap under backlight scene Take the photograph, in fact it could happen that part picture overexposure, entirely without details, the situation of a piece of white；It is likely to occur that there is part details at bright place, But dark place is the darkest, can't see details, the situation of a piece of black completely.Details, second-rate photo is not had based on such Carry out the panoramic pictures effect that panorama mosaic obtains poor, affect picture quality and check the experience of picture.

Summary of the invention

The embodiment of the present invention provides a kind of backlight scene panorama shooting method and mobile terminal, inverse to solve in prior art Under light scene, there is overexposure or the darkest scene, the problem affecting picture quality in the panoramic picture of shooting.

First aspect, the embodiment of the present invention provides a kind of backlight scene panorama shooting method, is applied to have photographic head Mobile terminal, wherein method includes:

Reception pan-shot instructs；

The each frame initial preview image gathered for photographic head, detects the shooting field that this frame initial preview image is corresponding Whether scape is backlight scene；

When the photographed scene detecting that initial preview image is corresponding is backlight scene, initial preview image is carried out high dynamic State scope processes, and generates middle preview image；

All initial preview images being under non-backlight scene that photographic head is gathered and be in warp under backlight scene Cross the middle preview image processed and carry out image mosaic according to the sequencing gathered, generate target panoramic picture.

Second aspect, the embodiment of the present invention also provides for a kind of mobile terminal, and including photographic head, mobile terminal also includes:

Receiver module, is used for receiving pan-shot instruction；

Detection module, for each frame initial preview image gathered for photographic head, detects this frame initial preview figure As whether corresponding photographed scene is backlight scene；

Processing module, is used for when detection module detects that the photographed scene that initial preview image is corresponding is backlight scene, Initial preview image is carried out HDR process, generates middle preview image；

Generation module, for all initial preview images being under non-backlight scene of being gathered by photographic head be in The middle preview image processed through processing module under backlight scene carries out image mosaic according to gathering sequencing, generates target Panoramic picture.

So, in the embodiment of the present invention, initial for each frame initial preview image detection present frame when pan-shot Whether preview image is under backlight scene, when present frame initial preview image is in backlight scene, initial for present frame Preview image carries out HDR process, generates middle preview image；By the middle preview image obtained and be in non-backlight Initial preview image under scene carries out splicing according to the sequencing of image acquisition and obtains panoramic picture so that obtain There is not the situation of high intensity range exposure in panoramic picture, details bright, dark place is the most high-visible, improves the bat of pan-shot Take the photograph effect and shooting is experienced, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest field occur Scape, the problem affecting picture quality.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required in the embodiment of the present invention being described below Accompanying drawing to be used is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, For those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings Obtain other accompanying drawing.

Fig. 1 represents the backlight scene panorama shooting method schematic diagram that the embodiment of the present invention one provides；

Fig. 2 represents the backlight scene panorama shooting method schematic diagram that the embodiment of the present invention two provides；

Fig. 3 represents the mobile terminal schematic diagram one that the embodiment of the present invention three provides；

Fig. 4 represents the mobile terminal schematic diagram two that the embodiment of the present invention three provides；

Fig. 5 represents the mobile terminal schematic diagram three that the embodiment of the present invention three provides；

Fig. 6 represents the mobile terminal schematic diagram four that the embodiment of the present invention three provides；

Fig. 7 represents the mobile terminal block diagram that the embodiment of the present invention four provides；

Fig. 8 represents the mobile terminal block diagram that the embodiment of the present invention five provides.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments wholely.Based on this Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under not making creative work premise Example, broadly falls into the scope of protection of the invention.

Embodiment one

As it is shown in figure 1, the backlight scene panorama shooting method that the embodiment of the present invention one provides, it is applied to that there is photographic head Mobile terminal, the method includes:

Step 101, reception pan-shot instruction.

First mobile terminal needs to receive the pan-shot instruction of user, enters pan-shot mould according to pan-shot instruction Formula, utilizes camera collection image to carry out pan-shot.After entering panorama photographing mode, need to perform step 102.

Step 102, each frame initial preview image gathered for photographic head, detect this frame initial preview image corresponding Photographed scene whether be backlight scene.

Mobile terminal, after entering panorama photographing mode, needs to detect during shooting each frame that photographic head is gathered Whether the photographed scene of initial preview image is backlight scene.Wherein the photographed scene at detection present frame initial preview image is No for backlight scene time, need obtain present frame initial preview image half-tone information, according to present frame initial preview image Half-tone information constitutes grey level histogram, is divided into that be arranged in order, each according to the order that gray value is incremented by by grey level histogram N number of region including the gray value of respective number；In each of which region, the quantity of gray value can be equal, it is also possible to not phase Deng.In grey level histogram, each gray value is to there being corresponding pixel number, and the gray value information of grey level histogram is 0～255.Then determine whether the photographed scene of present frame initial preview image is backlight field according to the half-tone information in N number of region Scape, wherein N is the integer more than or equal to 3.

And the boundary gray value in adjacent two regions is adjacent, the ending boundaries gray value in the most previous region and later district The beginning boundary gray value in territory is adjacent.Such as: grey level histogram is divided into three regions, the gray value of first area be 0～ 36, the gray value of second area is 37～178, and the gray value in the 3rd region is 179～255.

Step 103, when the photographed scene detecting that initial preview image is corresponding is backlight scene, to initial preview image Carry out HDR process, generate middle preview image.

After the photographed scene determining present frame initial preview image is backlight scene, need present frame initial preview Image carries out HDR process, and concrete processing mode is for determine overexposure preview graph for present frame initial preview image Picture, deficient exposure preview image and the preview image of normal exposure, carry out synthesis process according to these three image, to obtain middle preview Image.

It should be noted that when obtaining the preview image of different exposure parameter, if current mobile terminal only includes one Photographic head, then be required for the overexposure region of present frame initial preview image and the deficient region that exposes and process the most accordingly.When When mobile terminal includes two photographic head, it is possible to use a photographic head output overexposure preview image, the output of another photographic head is normal Exposure preview image and deficient exposure preview image.When mobile terminal includes three photographic head, it is possible to use a photographic head exported Exposing preview image, another photographic head output normal exposure preview image, a remaining photographic head output owes to expose preview image.

Step 104, all initial preview images being under non-backlight scene that photographic head is gathered and be in backlight Under scene, treated middle preview image carries out image mosaic according to the sequencing gathered, and generates target panoramic picture.

After obtaining middle preview image after treatment, according to the sequencing of image acquisition, it is in all Initial preview image under non-backlight scene and be in treated middle preview image under backlight scene and carry out panoramic mosaic.

It should be noted that when carrying out pan-shot, detect for each frame initial preview image, detect this frame Whether the photographed scene that initial preview image is corresponding is backlight scene, and the photographed scene at this frame initial preview image is backlight field Jing Shi, needs to carry out this frame initial pictures processing to generate middle preview image, needs to give up backlight when carrying out panoramic mosaic Undressed initial preview image under scene, uses treated middle preview image under backlight scene to splice.? Each frame initial preview image is detected, detects whether photographed scene corresponding to this frame initial preview image is backlight scene Time, if the photographed scene of this frame initial preview image is non-backlight scene, this frame initial preview image can be used to carry out entirely Scape splices.Concrete, when the image that each two field picture of panoramic picture is all shooting under backlight scene, then need each Two field picture all processes, and each two field picture in the panoramic picture now obtained is all middle preview graph after treatment Picture.

If the parts of images of panoramic picture is the image of shooting under backlight scene, another part is under non-backlight scene During the image shot, then need the acquisition time according to each two field picture, be under non-backlight scene the initial pre-of shooting to all Look at image and be under backlight scene shooting and middle preview image after treatment according to the time sequencing successively Carry out splicing, it is thus achieved that spliced panoramic picture.

The embodiment of the present invention one, detects present frame initial preview figure when pan-shot for each frame initial preview image Seem no being under backlight scene, when present frame initial preview image is in backlight scene, for present frame initial preview figure As carrying out HDR process, generate middle preview image；By the middle preview image obtained and being under non-backlight scene Initial preview image according to the sequencing of image acquisition carry out splicing obtain panoramic picture so that the panorama sketch obtained As there is not the situation of high intensity range exposure, details bright, dark place is the most high-visible, improves the shooting effect of pan-shot And shooting experience, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest scene, shadow occur The problem ringing picture quality.

Embodiment two

As in figure 2 it is shown, the backlight scene panorama shooting method that the embodiment of the present invention two provides, it is applied to that there is photographic head Mobile terminal, the method includes:

Step 201, reception pan-shot instruction.

Panorama photographing mode, each frame gathered for photographic head is entered after receiving the enabled instruction of pan-shot Initial preview image detects whether the photographed scene of this frame initial preview image is under backlight scene, now needs to perform step 202。

Step 202, each frame initial preview image gathered for photographic head, obtain the ash of this frame initial preview image Degree information.

Step 203, based on half-tone information, generate grey level histogram.

Wherein in grey level histogram, each gray value is to there being corresponding pixel number, and the ash of grey level histogram Angle value information is 0～255, performs step 204 after generating grey level histogram.

Step 204, by grey level histogram according to gray value be incremented by order be divided into N number of region.

The order that grey level histogram is incremented by according to gray value is divided into the N number of region being arranged in order.Wherein, N number of region In each region include the gray value of preset number.In each of which region, the quantity of gray value can be equal, it is also possible to no Equal.

And the gray value information composition 0～255 in N number of region, when grey level histogram being divided into three regions, the firstth district The gray value in territory can include 0～78, and the gray value of second area can include 79～155, and the gray value in the 3rd region is permissible Including 156～255.

Step 205, gray value based on N number of region, determine that whether photographed scene that this frame initial preview image is corresponding is Backlight scene.

After being divided by grey level histogram, need to determine the bat of current frame image according to the gray value in N number of region Taking the photograph whether scene is backlight scene, its mode includes three kinds.

Mode one

When grey level histogram includes first area, second area and the 3rd that the order being incremented by according to gray value is arranged in order During region, then gray value based on N number of region, determine whether the photographed scene that this frame initial preview image is corresponding is backlight scene Mode be:

The pixel number that in statistics first area, each gray value is corresponding, determines have the first of maximum pixel point number Gray value, and add up pixel number N1 of the first gray value；

The pixel number that in statistics second area, each gray value is corresponding, determines have the second of maximum pixel point number Gray value, and add up pixel number N2 of the second gray value；

Add up the pixel number that in the 3rd region, each gray value is corresponding, determine that there is the 3rd of maximum pixel point number Gray value, and add up pixel number N3 of the 3rd gray value；

When N1 is more than N2 more than N2 and N3, determine that the photographed scene that this frame initial preview image is corresponding is backlight scene.

Concrete, grey level histogram is being divided into three regions being arranged in order, and first area, second area, the When the gray value in three regions is incremented by successively, needs to add up the number of the pixel of each gray value in first area, and determine The first gray value that in first area, maximum pixel point number is corresponding, it is then determined that the pixel number that the first gray value is corresponding N1.Such as: the gray value in first area has 31, and corresponding gray value is 0～30, need to add up each gray value corresponding The number of pixel, and determine the quantity of pixel number that most the first gray value of pixel number is corresponding.Such as ash The pixel number of angle value 30 correspondence is most, then it needs to be determined that the pixel number of gray value 30 correspondence, be defined as by this number N1。

Simultaneously need to the number of the pixel of each gray value in statistics second area, and determine in second area maximum The second gray value that pixel number is corresponding, it is then determined that pixel number N2 that the second gray value is corresponding.Such as: second area In gray value have 151, corresponding gray value is 31～181, need to add up pixel corresponding to each gray value Number, and determine the quantity of pixel number that most the second gray value of pixel number is corresponding.Such as gray value 126 correspondence Pixel number is most, then it needs to be determined that the pixel number of gray value 126 correspondence, this number is defined as N2.

It is also required to add up the number of the pixel of each gray value in the 3rd region, and determines maximum picture in the 3rd region The 3rd gray value that vegetarian refreshments number is corresponding, it is then determined that pixel number N3 that the 3rd gray value is corresponding.Such as: in the 3rd region Gray value have 74, corresponding gray value is 182～255, needs to add up the number of pixel corresponding to each gray value, And determine the quantity of pixel number that most the 3rd gray value of pixel number is corresponding.The such as picture of gray value 224 correspondence Vegetarian refreshments number is most, then it needs to be determined that the pixel number of gray value 224 correspondence, this number is defined as N3.

Then the size of N1, N2, N3 is compared, when N1 is more than N2 more than N2 and N3, now the first of grey level histogram Region, second area, the maximum pixel point number information in the 3rd region present U-shaped, then may determine that this frame initial preview image Photographed scene be backlight scene.

Mode two

Calculate the quantity sum of all pixels in first area and the 3rd region, obtain the first pixel and value；

Calculate the quantity sum of all pixels in first area, second area and the 3rd region, obtain the second pixel And value；

Calculate the first pixel and value and the second pixel and the ratio of value, obtain pixel ratio；

Pixel ratio is compared with predetermined threshold value；

When pixel ratio is more than predetermined threshold value, determine that the photographed scene that this frame initial preview image is corresponding is backlight field Scape.

Concrete, grey level histogram is being divided into three regions being arranged in order, and first area, second area, the When the gray value in three regions is incremented by successively, the quantity of pixel in quantity K1 of pixel, second area in statistics first area Quantity K3 of pixel in K2, the 3rd region.Calculate pixel in quantity K1 of pixel in first area and the 3rd region Quantity K3 sum, obtains the first pixel and value.Pixel in quantity K1 of pixel, second area in calculating first area In quantity K2 and the 3rd region, the quantity K3 sum of pixel, obtains the second pixel and value.Then calculate the first pixel and Value and the second pixel and the ratio of value, obtain pixel ratio.After obtaining pixel ratio, by pixel ratio with pre- If threshold value compares, when pixel ratio is more than predetermined threshold value, it may be determined that the photographed scene of this frame initial preview image For backlight scene.

Mode three

Calculate each gray value of first area and the corresponding pixel number sum of products, obtain first and value；

Calculate the ratio of first and value with total number of the gray value of first area, obtain the first reference value M1；

Calculate each gray value of second area and the corresponding pixel number sum of products, obtain second and value；

Calculate the ratio of second and value with total number of the gray value of second area, obtain the second reference value M2；

Calculate each gray value in the 3rd region and the corresponding pixel number sum of products, obtain the 3rd and value；

Calculate the ratio of the 3rd and value with total number of the gray value in the 3rd region, obtain the 3rd reference value M3；

When M1 is more than M2 less than M2 and M3, determine that the photographed scene that this frame initial preview image is corresponding is backlight scene.

Concrete, grey level histogram is being divided into three regions being arranged in order, and first area, second area, the When the gray value in three regions is incremented by successively, for first area, obtain the pixel that each gray value of first area is corresponding Number, then calculates the product of each gray value and corresponding pixel number, when including 31 gray values in the first region, and can To obtain 31 products, cumulative 31 products obtain first and value, calculate first and value and the gray value corresponding to first area The ratio of quantity 31 is worth to M1.

For being simultaneous for second area, obtain the pixel number that each gray value of second area is corresponding, then count Calculate the product of each gray value and corresponding pixel number, when including 151 gray values in the second area, can obtain 151 products, cumulative 151 products obtain second and value, calculate second and value and the number of gray values corresponding to second area The ratio of 151 is worth to M2.

For the 3rd region, obtain the pixel number that each gray value in the 3rd region is corresponding, then calculate every One gray value and the product of corresponding pixel number, when the 3rd region includes 74 gray values, can obtain 74 and take advantage of Long-pending, cumulative 74 products obtain the 3rd and value, calculate the 3rd and value and the ratio of the number of gray values 74 corresponding to the 3rd region Obtain M3.

Then compare the size of M1, M2, M3, when M1 is more than M2 less than M2 and M3, determine this frame initial preview image Photographed scene is backlight scene.

Step 206, when the photographed scene detecting that initial preview image is corresponding is backlight scene, to initial preview image Carry out HDR process, generate middle preview image.

When determining that the photographed scene of this frame initial preview image is backlight scene, need this frame initial preview image Carry out HDR process, when this frame initial preview image being carried out HDR and processing, need according to mobile terminal The number of photographic head determines processing mode.

When mobile terminal includes a photographic head, for this two field picture, extract the overexposure region in initial preview image Image and deficient exposure area image；Reduce the brightness of overexposure area image to predetermined luminance value；Deficient exposure area image is carried out brightness Compensation deals；Based on the overexposure area image after the region of normal exposure area image in initial preview image, process and deficient exposure region Image, generates middle preview image；Wherein, overexposure area image is the exposure parameter image more than the first predetermined threshold value, owes to expose Area image is the image that exposure parameter is less than the second predetermined threshold value.

Only include a photographic head due to mobile terminal, be required for present frame initial preview image zooming-out and go out normal exposure Light area image, under-exposure area image and overexposure region area image, then carry out reducing brightness for overexposure area image Process so that the luminance-reduction of overexposure area image is to predetermined luminance value.For deficient exposure area image, need to carry out brightness Compensation deals, then according to the overexposure area image after processing and deficient exposure area image and untreated region of normal exposure Area image synthesizes, it is thus achieved that middle preview image.

When mobile terminal includes the first photographic head and second camera, carrying out HDR for current frame image Before process, it is thus necessary to determine that overexposure backlight grade corresponding to backlight scene and owe to expose backlight grade；Wherein determine backlight scene pair The mode of the overexposure backlight grade answered and deficient exposure backlight grade is:

Maximum pixel in maximum pixel point number N1, second area in first area in the mode one of obtaining step 205 Maximum pixel point number N3 in some number N2 and the 3rd region.Then overexposure backlight grade, root are determined according to the value of N1/N2 Determine according to the value of N3/N2 and owe to expose backlight grade.Such as when N1/N2 is between the first numerical range 0～10, determine N1/N2 Belong to the first overexposure backlight grade, when N1/N2 is between second value scope 11～20, determine that N1/N2 belongs to the second overexposure Backlight grade ... when N1/N2 is between the tenth numerical range 91～100, determine that N1/N2 belongs to the tenth overexposure backlight grade.

When N3/N2 is between the first numerical range 0～10, determine that N3/N2 belongs to first and owes to expose backlight grade, work as N3/ N2, between second value scope 11～20, determines that N3/N2 belongs to second and owes to expose backlight grade ... when N3/N2 is positioned at the tenth Between numerical range 91～100, determine that N3/N2 belongs to the tenth and owes to expose backlight grade.

If the levels of exposure that wherein photographic head can be arranged is the most, the scope of grade can be expanded, according to actual feelings Condition determines corresponding number of levels.

After determining overexposure backlight grade and owing to expose backlight grade, need initial preview image is carried out high dynamic range Enclose process, generate middle preview image, particularly as follows:

The frame normal exposure preview image and the frame that obtain the first photographic head continuous acquisition are owed to expose preview image；

Obtain the frame overexposure preview image that second camera gathers；

Normal exposure preview image, deficient exposure preview image and overexposure preview image are carried out image synthesis, generates middle pre- Look at image；

Wherein, overexposure preview image is the exposure parameter image more than the first predetermined threshold value, owes to expose preview image for exposure Parameter less than the image of the second predetermined threshold value, normal exposure preview image be exposure parameter be the image of the 3rd predetermined threshold value.

Concrete, obtain the first exposure parameter of the first photographic head of normal exposure and the normal of the first photographic head output Exposure preview image；The exposure parameter of second camera is set according to the first exposure parameter and overexposure backlight grade, and obtains The overexposure preview image of two photographic head outputs.Owing to the time of exposure of overexposure preview image is longer, therefore defeated at the first photographic head After going out normal exposure preview image, the exposure parameter of the first photographic head can be set according to deficient exposure backlight grade, and obtain The deficient exposure preview image of one photographic head output, this kind of mode obtains normally, overexposure, owe exposure preview image used time the shortest.Finally According to normal exposure preview image, overexposure preview image and deficient exposure preview image synthetic mesophase preview image.

When mobile terminal includes the first photographic head, second camera and three photographic head, entering for current frame image Before row HDR processes, it is thus necessary to determine that overexposure backlight grade corresponding to backlight scene and owe to expose backlight grade；The most true Determine overexposure backlight grade corresponding to backlight scene and the deficient mode exposing backlight grade includes two photographic head with above-mentioned mobile terminal Mode identical.

Obtain a frame normal exposure preview image of the first camera collection, a frame overexposure preview of second camera collection One frame of image and the 3rd camera collection is owed to expose preview image；

Normal exposure preview image, overexposure preview image and the deficient preview image that exposes are carried out image synthesis, generates middle pre- Look at image；

First exposure parameter of the first photographic head of acquisition normal exposure and the normal exposure of the first photographic head output are pre- Look at image；Then the exposure parameter of second camera is set according to the first exposure parameter and overexposure backlight grade, and obtains second The overexposure preview image of photographic head output；Finally according to the first exposure parameter and the deficient backlight grade that exposes, the exposure of the 3rd photographic head is set Optical parameter, and obtain the deficient exposure preview image of the 3rd photographic head output；According to the normal exposure preview image obtained, overexposure preview Image and deficient exposure preview image synthetic mesophase preview image.

Step 207, all initial preview images being under non-backlight scene that photographic head is gathered and be in backlight Under scene, treated middle preview image carries out image mosaic according to the sequencing gathered, and generates target panoramic picture.

After obtaining middle preview image, according to the sequencing of image acquisition, to obtained all be in non-inverse Initial preview image under light scene carries out panorama with being under backlight scene that shoot and treated middle preview image Splicing.

Wherein when the image that each two field picture of panoramic picture is all shooting under backlight scene, then need each frame Image all processes, and each two field picture in the panoramic picture now obtained is all middle preview image after treatment.

If the parts of images of panoramic picture is the image of shooting under backlight scene, another part is under non-backlight scene During the image shot, then need to obtain shooting under all initial preview images being under non-backlight scene shooting and backlight scene And the acquisition time of treated middle preview image, carry out splicing successively according to the sequencing of time, it is thus achieved that Spliced panoramic picture.

The embodiment of the present invention two, detects present frame initial preview figure when pan-shot for each frame initial preview image Seem no being under backlight scene, when present frame initial preview image is in backlight scene, for present frame initial preview figure As carrying out HDR process, generate middle preview image；By the middle preview image obtained and being under non-backlight scene Initial preview image according to the sequencing of image acquisition carry out splicing obtain panoramic picture so that the panorama sketch obtained As there is not the situation of high intensity range exposure, details bright, dark place is the most high-visible, improves the shooting effect of pan-shot And shooting experience, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest scene, shadow occur The problem ringing picture quality.

Embodiment three

The embodiment of a kind of mobile terminal provided for the embodiment of the present invention three below, the most detailed in the embodiment of mobile terminal The detail content described to the greatest extent, is referred to said method embodiment.

The embodiment of the present invention provides a kind of mobile terminal, can realize backlight scene panorama shooting method in embodiment one Details, and reach identical effect.As it is shown on figure 3, mobile terminal includes:

Receiver module 10, is used for receiving pan-shot instruction；

Detection module 20, for each frame initial preview image gathered for photographic head, detects this frame initial preview Whether the photographed scene that image is corresponding is backlight scene；

When detection module 20, processing module 30, for detecting that the photographed scene that initial preview image is corresponding is backlight scene Time, initial preview image is carried out HDR process, generates middle preview image；

Generation module 40, for all initial preview images being under non-backlight scene gathered by photographic head and place The middle preview image processed through processing module 30 under backlight scene carries out image mosaic according to gathering sequencing, generates Target panoramic picture.

Wherein, as shown in Figure 4, detection module 20 includes:

First obtains submodule 21, for obtaining the half-tone information of this frame initial preview image；

Generate submodule 22, for based on obtaining the half-tone information that submodule 21 obtains, generating grey level histogram；

Divide submodule 23, for the order being incremented by by grey level histogram that submodule 22 generates will be generated according to gray value It is divided into N number of region；

Determine submodule 24, for gray value based on the N number of region dividing submodule 23 division, determine that this frame is the most pre- Whether the photographed scene that image of looking at is corresponding is backlight scene；

Wherein, each region in N number of region includes the gray value of preset number.

Wherein, when grey level histogram include according to gray value be incremented by order be arranged in order first area, second area During with three regions, as it is shown in figure 5, determine that submodule 24 includes:

First processing unit 2401, for adding up the pixel number that each gray value in first area is corresponding, determines tool There is the first gray value of maximum pixel point number, and add up pixel number N1 of the first gray value；

Second processing unit 2402, for adding up the pixel number that each gray value in second area is corresponding, determines tool There is the second gray value of maximum pixel point number, and add up pixel number N2 of the second gray value；

3rd processing unit 2403, the pixel number that each gray value is corresponding in statistics the 3rd region, determine tool There is the 3rd gray value of maximum pixel point number, and add up pixel number N3 of the 3rd gray value；

First determines unit 2404, for when N1 is more than N2 more than N2 and N3, determines that this frame initial preview image is corresponding Photographed scene be backlight scene.

Wherein, when grey level histogram include according to gray value be incremented by order be arranged in order first area, second area During with three regions, determine that submodule 24 includes:

First computing unit 2405, for calculating the quantity sum of all pixels in first area and the 3rd region, To the first pixel and value；

Second computing unit 2406, for calculating the number of all pixels in first area, second area and the 3rd region Amount sum, obtains the second pixel and value；

3rd computing unit 2407, based on the first pixel obtained by calculating the first computing unit 2405 and value and second Calculate the second pixel and the ratio of value that unit 2406 obtains, obtain pixel ratio；

Comparing unit 2408, for comparing the pixel ratio that the 3rd computing unit 2407 obtains with predetermined threshold value Relatively；

Second determines unit 2409, is used for when the comparative result of comparing unit 2408 is that pixel ratio is more than predetermined threshold value Time, determine that the photographed scene that this frame initial preview image is corresponding is backlight scene.

4th computing unit 2410, for calculate first area each gray value and corresponding pixel number product it With, obtain first and value；

5th computing unit 2411, for calculating first and value and the ash of first area that the 4th computing unit 2410 obtains The ratio of total number of angle value, obtains the first reference value M1；

6th computing unit 2412, for calculate second area each gray value and corresponding pixel number product it With, obtain second and value；

7th computing unit 2413, for calculating second and value and the ash of second area that the 6th computing unit 2412 obtains The ratio of total number of angle value, obtains the second reference value M2；

8th computing unit 2414, for calculate the 3rd region each gray value and corresponding pixel number product it With, obtain the 3rd and value；

9th computing unit 2415, for calculating the 3rd and value and the ash in the 3rd region that the 8th computing unit 2414 obtains The ratio of total number of angle value, obtains the 3rd reference value M3；

3rd determines unit 2416, for when M1 is more than M2 less than M2 and M3, determines that this frame initial preview image is corresponding Photographed scene be backlight scene.

Wherein, when mobile terminal includes a photographic head, as shown in Figure 6, processing module 30 includes:

Extract submodule 31, for extracting the overexposure area image in initial preview image and owing to expose area image；

First processes submodule 32, bright to presetting for reducing the brightness extracting the overexposure area image that submodule 31 extracts Angle value；

Second processes submodule 33, for carrying out the deficient exposure area image extracting submodule 31 extraction at luminance compensation Reason；

3rd processes submodule 34, for based on the mistake after the region of normal exposure area image in initial preview image, process Expose area image and owe to expose area image, preview image in the middle of generation；

Wherein, overexposure area image is the exposure parameter image more than the first predetermined threshold value, owes to expose area image for exposure Parameter is less than the image of the second predetermined threshold value.

Wherein, when mobile terminal includes the first photographic head and second camera, processing module 30 includes:

Second obtains submodule 35, for obtaining a frame normal exposure preview image and of the first photographic head continuous acquisition Frame is owed to expose preview image；

3rd obtains submodule 36, for obtaining the frame overexposure preview image that second camera gathers；

First synthon module 37, for the normal exposure preview image obtained by the second acquisition submodule 35, owes to expose in advance Image and the 3rd of looking at obtains the overexposure preview image of submodule 36 acquisition and carries out image synthesis, generates middle preview image；

Wherein, when mobile terminal includes the first photographic head, second camera and three photographic head, processing module 30 is wrapped Include:

4th obtains submodule 38, for obtaining a frame normal exposure preview image of the first camera collection, second taking the photograph The frame overexposure preview image gathered as head and a frame of the 3rd camera collection are owed to expose preview image；

Second synthon module 39, pre-for normal exposure preview image, the overexposure that the 4th acquisition submodule 38 is obtained Image of looking at carries out image synthesis with the deficient preview image that exposes, and generates middle preview image；

The embodiment of the present invention three, detects present frame initial preview figure when pan-shot for each frame initial preview image Seem no being under backlight scene, when present frame initial preview image is in backlight scene, for present frame initial preview figure As carrying out HDR process, generate middle preview image；By the middle preview image obtained and being under non-backlight scene Initial preview image according to the sequencing of image acquisition carry out splicing obtain panoramic picture so that the panorama sketch obtained As there is not the situation of high intensity range exposure, details bright, dark place is the most high-visible, improves the shooting effect of pan-shot And shooting experience, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest scene, shadow occur The problem ringing picture quality.

Embodiment four

Fig. 7 is the block diagram of the mobile terminal of another embodiment of the present invention.Mobile terminal 700 shown in Fig. 7 includes: at least One processor 701, memorizer 702, at least one network interface 704, user interface 703 and photographic head 706.Mobile terminal Each assembly in 700 is coupled by bus system 705.It is understood that bus system 705 be used for realizing these assemblies it Between connection communication.Bus system 705, in addition to including data/address bus, also includes power bus, controls bus and status signal Bus.But for the sake of understanding explanation, in the figure 7 various buses are all designated as bus system 705.

Wherein, user interface 703 can include display, keyboard or pointing device (such as, mouse, trace ball (trackball), touch-sensitive plate or touch screen etc..

The memorizer 702 being appreciated that in the embodiment of the present invention can be volatile memory or nonvolatile memory, Maybe can include volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read only memory (Read- Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), the read-only storage of erasable programmable Device (Erasable PROM, EPROM), Electrically Erasable Read Only Memory (Electrically EPROM, EEPROM) or Flash memory.Volatile memory can be random access memory (Random Access Memory, RAM), and it is used as outside high Speed caching.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data speed synchronous dynamic RAM (Double Data Rate SDRAM, DDRSDRAM), enhancement mode Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links Dynamic random access memory (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct Rambus RAM, DRRAM).The memorizer 702 of system and method described herein be intended to include but not limited to these and arbitrarily its It is suitable for the memorizer of type.

In some embodiments, memorizer 702 stores following element, executable module or data structure, or Their subset of person, or their superset: operating system 7021 and application program 7022.

Wherein, operating system 7021, comprise various system program, such as ccf layer, core library layer, driving layer etc., be used for Realize various basic business and process hardware based task.Application program 7022, comprises various application program, such as media Player (Media Player), browser (Browser) etc., be used for realizing various applied business.Realize the embodiment of the present invention The program of method may be embodied in application program 7022.

In embodiments of the present invention, by calling program or the instruction of memorizer 702 storage, concrete, can be application The program stored in program 7022 or instruction, processor 701 is used for: the pan-shot instruction received according to user interface 703； Whether each frame initial preview image gathered for photographic head, detecting photographed scene corresponding to this frame initial preview image is Backlight scene；When the photographed scene detecting that initial preview image is corresponding is backlight scene, initial preview image is carried out height Dynamic range processes, and generates middle preview image；All initial preview being under non-backlight scene that photographic head is gathered Image carries out image mosaic with being in treated middle preview image under backlight scene according to the sequencing gathered, and generates Target panoramic picture.

The method that the invention described above embodiment discloses can apply in processor 701, or is realized by processor 701. Processor 701 is probably a kind of IC chip, has the disposal ability of signal.During realizing, said method each Step can be completed by the instruction of the integrated logic circuit of the hardware in processor 701 or software form.Above-mentioned process Device 701 can be general processor, digital signal processor (Digital Signal Processor, DSP), special integrated electricity Road (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other PLDs, discrete gate or transistor logic, Discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General The processor etc. that processor can be microprocessor or this processor can also be any routine.In conjunction with embodiment of the present invention institute The step of disclosed method can be embodied directly in hardware decoding processor and perform, or with the hardware in decoding processor And software module combination execution completes.Software module may be located at random access memory, and flash memory, read only memory are able to programme read-only In the storage medium that this areas such as memorizer or electrically erasable programmable memorizer, depositor are ripe.This storage medium is positioned at Memorizer 702, processor 701 reads the information in memorizer 702, completes the step of said method in conjunction with its hardware.

It is understood that embodiments described herein can use hardware, software, firmware, middleware, microcode or its Combination realizes.Realizing for hardware, processing unit can be implemented in one or more special IC (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general processor, Controller, microcontroller, microprocessor, for performing in other electronic unit or a combination thereof of herein described function.

Software is realized, can be realized herein by the module (such as process, function etc.) performing function described herein Described technology.Software code is storable in performing in memorizer and by processor.Memorizer can within a processor or Processor is outside to be realized.

Alternatively, processor 701 when detecting photographed scene corresponding to this frame initial preview image and whether being backlight scene, It is additionally operable to: obtain the half-tone information of this frame initial preview image；Based on half-tone information, generate grey level histogram；By intensity histogram The order that figure is incremented by according to gray value is divided into N number of region；Gray value based on N number of region, determines this frame initial preview image Whether corresponding photographed scene is backlight scene；Wherein, each region in N number of region includes the gray value of preset number.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 701, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, it is additionally operable to: the pixel number that in statistics first area, each gray value is corresponding, determines and have First gray value of maximum pixel point number, and add up pixel number N1 of the first gray value；Add up each in second area The pixel number that gray value is corresponding, determines second gray value with maximum pixel point number, and adds up the second gray value Pixel number N2；Add up the pixel number that in the 3rd region, each gray value is corresponding, determine that there is maximum pixel point number The 3rd gray value, and add up pixel number N3 of the 3rd gray value；When N1 is more than N2 more than N2 and N3, determine at the beginning of this frame The photographed scene that beginning preview image is corresponding is backlight scene.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 701, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, it is additionally operable to: calculate the quantity sum of all pixels in first area and the 3rd region, obtain First pixel and value；Calculate the quantity sum of all pixels in first area, second area and the 3rd region, obtain second Pixel and value；Calculate the first pixel and value and the second pixel and the ratio of value, obtain pixel ratio；By pixel ratio Value compares with predetermined threshold value；When pixel ratio is more than predetermined threshold value, determine the bat that this frame initial preview image is corresponding Taking the photograph scene is backlight scene.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 701, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, be additionally operable to: calculate first area each gray value and corresponding pixel number product it With, obtain first and value；Calculate the ratio of first and value with total number of the gray value of first area, obtain the first reference value M1；Calculate each gray value of second area and the corresponding pixel number sum of products, obtain second and value；Calculate the second He Value and the ratio of total number of the gray value of second area, obtain the second reference value M2；Calculate each gray value in the 3rd region With the corresponding pixel number sum of products, obtain the 3rd and value；Calculate total of the 3rd and the gray value in value and the 3rd region The ratio of number, obtains the 3rd reference value M3；When M1 is more than M2 less than M2 and M3, determine the bat that this frame initial preview image is corresponding Taking the photograph scene is backlight scene.

Optionally, when mobile terminal includes a photographic head, processor 701 carries out high dynamic range to initial preview image Enclose process, when generating middle preview image, be additionally operable to: extract the overexposure area image in initial preview image and owe to expose administrative division map Picture；Reduce the brightness of overexposure area image to predetermined luminance value；Deficient exposure area image is carried out luminance compensation process；Based on initially Region of normal exposure area image in preview image, the overexposure area image after process and the deficient area image that exposes, preview in the middle of generation Image；Wherein, overexposure area image is the exposure parameter image more than the first predetermined threshold value, and owing to expose area image is exposure parameter Image less than the second predetermined threshold value.

Optionally, when mobile terminal includes the first photographic head and second camera, processor 701 is to initial preview image Carry out HDR process, when generating middle preview image, be additionally operable to: the frame obtaining the first photographic head continuous acquisition is normal Exposure preview image and a frame are owed to expose preview image；Obtain the frame overexposure preview image that second camera gathers；To normally expose Light preview image, deficient exposure preview image and overexposure preview image carry out image synthesis, generate middle preview image；Wherein, overexposure Preview image is the exposure parameter image more than the first predetermined threshold value, and owing to expose preview image is that exposure parameter is less than second and presets threshold Value image, normal exposure preview image be exposure parameter be the image of the 3rd predetermined threshold value.

Optionally, when mobile terminal includes the first photographic head, second camera and three photographic head, processor 701 is right Initial preview image carries out HDR process, when generating middle preview image, is additionally operable to: obtain the first camera collection Frame overexposure preview image and the frame of the 3rd camera collection that one frame normal exposure preview image, second camera gather Owe to expose preview image；Normal exposure preview image, overexposure preview image and the deficient preview image that exposes are carried out image synthesis, in generation Between preview image；Wherein, overexposure preview image is the exposure parameter image more than the first predetermined threshold value, owes to expose preview image for exposing Optical parameter less than the image of the second predetermined threshold value, normal exposure preview image be exposure parameter be the image of the 3rd predetermined threshold value.

Mobile terminal 700 is capable of each process that in previous embodiment, mobile terminal realizes, for avoiding repeating, here Repeat no more.

The embodiment of the present invention four, detects present frame initial preview figure when pan-shot for each frame initial preview image Seem no being under backlight scene, when present frame initial preview image is in backlight scene, for present frame initial preview figure As carrying out HDR process, generate middle preview image；By the middle preview image obtained and being under non-backlight scene Initial preview image according to the sequencing of image acquisition carry out splicing obtain panoramic picture so that the panorama sketch obtained As there is not the situation of high intensity range exposure, details bright, dark place is the most high-visible, improves the shooting effect of pan-shot And shooting experience, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest scene, shadow occur The problem ringing picture quality.

Embodiment five

Fig. 8 is the structural representation of the mobile terminal of another embodiment of the present invention.Specifically, the mobile terminal in Fig. 8 800 can be mobile phone, panel computer, personal digital assistant (Personal Digital Assistant, PDA) or vehicle mounted electric Brain etc..

Mobile terminal 800 in Fig. 8 includes radio frequency (Radio Frequency, RF) circuit 810, memorizer 820, input Unit 830, display unit 840, photographic head 850, processor 860, voicefrequency circuit 870, WiFi (Wireless Fidelity) mould Block 880 and power supply 890.

Wherein, input block 830 can be used for receiving numeral or the character information of user's input, and produces and mobile terminal The user setup of 800 and function control relevant signal input.Specifically, in the embodiment of the present invention, this input block 830 can To include contact panel 831.Contact panel 831, also referred to as touch screen, can collect user thereon or neighbouring touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on contact panel 831), and according in advance The formula set drives corresponding attachment means.Optionally, contact panel 831 can include touch detecting apparatus and touch controller Two parts.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, by signal Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, Give this processor 860 again, and order that processor 860 sends can be received and performed.Furthermore, it is possible to employing resistance-type, The polytypes such as condenser type, infrared ray and surface acoustic wave realize contact panel 831.Except contact panel 831, input block 830 can also include other input equipments 832, and other input equipments 832 can include but not limited to physical keyboard, function key One or more in (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..

Wherein, display unit 840 can be used for showing the information inputted by user or the information being supplied to user and movement The various menu interfaces of terminal 800.Display unit 840 can include display floater 841, optionally, can use LCD or organic The forms such as optical diode (Organic Light-Emitting Diode, OLED) configure display floater 841.

It should be noted that contact panel 831 can cover display floater 841, formed and touch display screen, when this touch display screen is examined Measure thereon or after neighbouring touch operation, send processor 860 to determine the type of touch event, with preprocessor 860 provide corresponding visual output according to the type of touch event on touch display screen.

Touch display screen and include Application Program Interface viewing area and conventional control viewing area.This Application Program Interface viewing area And the arrangement mode of this conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can be distinguished two and show Show the arrangement mode in district.This Application Program Interface viewing area is displayed for the interface of application program.Each interface is permissible The interface elements such as the icon and/or the widget desktop control that comprise at least one application program.This Application Program Interface viewing area It can also be the empty interface not comprising any content.This conventional control viewing area is for showing the control that utilization rate is higher, such as, The application icons etc. such as settings button, interface numbering, scroll bar, phone directory icon.

Wherein processor 860 is the control centre of mobile terminal 800, utilizes various interface and the whole mobile phone of connection Various piece, is stored in the software program in first memory 821 and/or module by running or performing, and calls storage Data in second memory 822, perform the various functions of mobile terminal 800 and process data, thus to mobile terminal 800 Carry out integral monitoring.Optionally, processor 860 can include one or more processing unit.

In embodiments of the present invention, by call the software program and/or module stored in this first memory 821 and/ Or the data in this second memory 822, processor 860 is used for: the pan-shot instruction received according to input block 830； Whether each frame initial preview image gathered for photographic head, detecting photographed scene corresponding to this frame initial preview image is Backlight scene；When the photographed scene detecting that initial preview image is corresponding is backlight scene, initial preview image is carried out height Dynamic range processes, and generates middle preview image；All initial preview being under non-backlight scene that photographic head is gathered Image carries out image mosaic with being in treated middle preview image under backlight scene according to the sequencing gathered, and generates Target panoramic picture.

Alternatively, processor 860 when detecting photographed scene corresponding to this frame initial preview image and whether being backlight scene, It is additionally operable to: obtain the half-tone information of this frame initial preview image；Based on half-tone information, generate grey level histogram；By intensity histogram The order that figure is incremented by according to gray value is divided into N number of region；Gray value based on N number of region, determines this frame initial preview image Whether corresponding photographed scene is backlight scene；Wherein, each region in N number of region includes the gray value of preset number.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 860, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, it is additionally operable to: the pixel number that in statistics first area, each gray value is corresponding, determines and have First gray value of maximum pixel point number, and add up pixel number N1 of the first gray value；Add up each in second area The pixel number that gray value is corresponding, determines second gray value with maximum pixel point number, and adds up the second gray value Pixel number N2；Add up the pixel number that in the 3rd region, each gray value is corresponding, determine that there is maximum pixel point number The 3rd gray value, and add up pixel number N3 of the 3rd gray value；When N1 is more than N2 more than N2 and N3, determine at the beginning of this frame The photographed scene that beginning preview image is corresponding is backlight scene.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 860, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, it is additionally operable to: calculate the quantity sum of all pixels in first area and the 3rd region, obtain First pixel and value；Calculate the quantity sum of all pixels in first area, second area and the 3rd region, obtain second Pixel and value；Calculate the first pixel and value and the second pixel and the ratio of value, obtain pixel ratio；By pixel ratio Value compares with predetermined threshold value；When pixel ratio is more than predetermined threshold value, determine the bat that this frame initial preview image is corresponding Taking the photograph scene is backlight scene.

Optionally, when grey level histogram include according to gray value be incremented by order be arranged in order first area, the secondth district When territory and three regions, processor 860, at gray value based on N number of region, determines the shooting that this frame initial preview image is corresponding When whether scene is backlight scene, be additionally operable to: calculate first area each gray value and corresponding pixel number product it With, obtain first and value；Calculate the ratio of first and value with total number of the gray value of first area, obtain the first reference value M1；Calculate each gray value of second area and the corresponding pixel number sum of products, obtain second and value；Calculate the second He Value and the ratio of total number of the gray value of second area, obtain the second reference value M2；Calculate each gray value in the 3rd region With the corresponding pixel number sum of products, obtain the 3rd and value；Calculate total of the 3rd and the gray value in value and the 3rd region The ratio of number, obtains the 3rd reference value M3；When M1 is more than M2 less than M2 and M3, determine the bat that this frame initial preview image is corresponding Taking the photograph scene is backlight scene.

Optionally, when mobile terminal includes a photographic head, processor 860 carries out high dynamic range to initial preview image Enclose process, when generating middle preview image, be additionally operable to: extract the overexposure area image in initial preview image and owe to expose administrative division map Picture；Reduce the brightness of overexposure area image to predetermined luminance value；Deficient exposure area image is carried out luminance compensation process；Based on initially Region of normal exposure area image in preview image, the overexposure area image after process and the deficient area image that exposes, preview in the middle of generation Image；Wherein, overexposure area image is the exposure parameter image more than the first predetermined threshold value, and owing to expose area image is exposure parameter Image less than the second predetermined threshold value.

Optionally, when mobile terminal includes the first photographic head and second camera, processor 860 is to initial preview image Carry out HDR process, when generating middle preview image, be additionally operable to: the frame obtaining the first photographic head continuous acquisition is normal Exposure preview image and a frame are owed to expose preview image；Obtain the frame overexposure preview image that second camera gathers；To normally expose Light preview image, deficient exposure preview image and overexposure preview image carry out image synthesis, generate middle preview image；Wherein, overexposure Preview image is the exposure parameter image more than the first predetermined threshold value, and owing to expose preview image is that exposure parameter is less than second and presets threshold Value image, normal exposure preview image be exposure parameter be the image of the 3rd predetermined threshold value.

Optionally, when mobile terminal includes the first photographic head, second camera and three photographic head, processor 860 is right Initial preview image carries out HDR process, when generating middle preview image, is additionally operable to: obtain the first camera collection Frame overexposure preview image and the frame of the 3rd camera collection that one frame normal exposure preview image, second camera gather Owe to expose preview image；Normal exposure preview image, overexposure preview image and the deficient preview image that exposes are carried out image synthesis, in generation Between preview image；Wherein, overexposure preview image is the exposure parameter image more than the first predetermined threshold value, owes to expose preview image for exposing Optical parameter less than the image of the second predetermined threshold value, normal exposure preview image be exposure parameter be the image of the 3rd predetermined threshold value.

The embodiment of the present invention five, detects present frame initial preview figure when pan-shot for each frame initial preview image Seem no being under backlight scene, when present frame initial preview image is in backlight scene, for present frame initial preview figure As carrying out HDR process, generate middle preview image；By the middle preview image obtained and being under non-backlight scene Initial preview image according to the sequencing of image acquisition carry out splicing obtain panoramic picture so that the panorama sketch obtained As there is not the situation of high intensity range exposure, details bright, dark place is the most high-visible, improves the shooting effect of pan-shot And shooting experience, solve the panoramic picture shot under backlight scene in prior art and overexposure or the darkest scene, shadow occur The problem ringing picture quality.

Those of ordinary skill in the art are it is to be appreciated that combine the list of each example that the embodiments described herein describes Unit and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These functions are actually Perform with hardware or software mode, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel Each specifically should being used for can be used different methods to realize described function, but this realization is it is not considered that exceed The scope of the present invention.

Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description, The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.

In embodiment provided herein, it should be understood that disclosed apparatus and method, can be passed through other Mode realizes.Such as, device embodiment described above is only schematically, such as, the division of described unit, it is only A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication link Connect, can be electrical, machinery or other form.

The described unit illustrated as separating component can be or may not be physically separate, shows as unit The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme 's.

It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.

If described function is using the form realization of SFU software functional unit and as independent production marketing or use, permissible It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is the most in other words The part contributing prior art or the part of this technical scheme can embody with the form of software product, this meter Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual People's computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention. And aforesaid storage medium includes: USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CD etc. are various can store program code Medium.

Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person for the art comes Saying, can also make some improvements and modifications under without departing from principle premise of the present invention, these improvements and modifications also exist In protection scope of the present invention.

Claims

1. a backlight scene panorama shooting method, is applied to the mobile terminal with photographic head, it is characterised in that described method Including:

Reception pan-shot instructs；

The each frame initial preview image gathered for described photographic head, detects the shooting field that this frame initial preview image is corresponding Whether scape is backlight scene；

When the photographed scene detecting that described initial preview image is corresponding is backlight scene, described initial preview image is carried out HDR processes, and generates middle preview image；

All initial preview images being under non-backlight scene that described photographic head is gathered and be in warp under backlight scene Cross the middle preview image processed and carry out image mosaic according to the sequencing gathered, generate target panoramic picture.

Method the most according to claim 1, it is characterised in that the shooting field that this frame initial preview image of described detection is corresponding Whether scape is the step of backlight scene, including:

Obtain the half-tone information of this frame initial preview image；

Based on described half-tone information, generate grey level histogram；

The order that described grey level histogram is incremented by according to gray value is divided into N number of region；

Gray value based on described N number of region, determines whether the photographed scene that this frame initial preview image is corresponding is backlight scene；

Wherein, each region in described N number of region includes the gray value of preset number.

Method the most according to claim 2, it is characterised in that when described grey level histogram include according to gray value be incremented by When first area, second area and three regions that order is arranged in order, described gray value based on described N number of region, determine Whether photographed scene corresponding to this frame initial preview image is the step of backlight scene, including:

Add up the pixel number that each gray value in described first area is corresponding, determine that there is the first of maximum pixel point number Gray value, and add up pixel number N1 of described first gray value；

Add up the pixel number that each gray value in described second area is corresponding, determine that there is the second of maximum pixel point number Gray value, and add up pixel number N2 of described second gray value；

Add up the pixel number that in described 3rd region, each gray value is corresponding, determine that there is the 3rd of maximum pixel point number Gray value, and add up pixel number N3 of described 3rd gray value；

Calculate the quantity sum of all pixels in described first area and described 3rd region, obtain the first pixel and value；

Calculate the quantity sum of all pixels in described first area, described second area and described 3rd region, obtain Two pixels and value；

Calculate described first pixel and value and described second pixel and the ratio of value, obtain pixel ratio；

Described pixel ratio is compared with predetermined threshold value；

When described pixel ratio is more than described predetermined threshold value, determine that the photographed scene that this frame initial preview image is corresponding is inverse Light scene.

Calculate each gray value of described first area and the corresponding pixel number sum of products, obtain first and value；

Calculate the ratio of described first and value with total number of the gray value of described first area, obtain the first reference value M1；

Calculate each gray value of described second area and the corresponding pixel number sum of products, obtain second and value；

Calculate the ratio of described second and value with total number of the gray value of described second area, obtain the second reference value M2；

Calculate each gray value in described 3rd region and the corresponding pixel number sum of products, obtain the 3rd and value；

Calculate the ratio of the described 3rd and value with total number of the gray value in described 3rd region, obtain the 3rd reference value M3；

Method the most according to claim 1, it is characterised in that when described mobile terminal includes a photographic head, described Described initial preview image is carried out HDR process, generates the step of middle preview image, including:

Extract the overexposure area image in described initial preview image and owe to expose area image；

Reduce the brightness of described overexposure area image to predetermined luminance value；

Described deficient exposure area image is carried out luminance compensation process；

Based on the overexposure area image after the region of normal exposure area image in described initial preview image, process and deficient exposure administrative division map Picture, generates described middle preview image；

Wherein, described overexposure area image is the exposure parameter image more than the first predetermined threshold value, and described deficient exposure area image is Exposure parameter is less than the image of the second predetermined threshold value.

Method the most according to claim 1, it is characterised in that when described mobile terminal includes that the first photographic head and second is taken the photograph During as head, described described initial preview image is carried out HDR process, generate in the middle of the step of preview image, including:

The frame normal exposure preview image and the frame that obtain described first photographic head continuous acquisition are owed to expose preview image；

Obtain the frame overexposure preview image that described second camera gathers；

Described normal exposure preview image, described deficient exposure preview image and described overexposure preview image are carried out image synthesis, raw Become described middle preview image；

Wherein, described overexposure preview image is the exposure parameter image more than the first predetermined threshold value, and described deficient exposure preview image is Exposure parameter less than the image of the second predetermined threshold value, described normal exposure preview image be exposure parameter be the 3rd predetermined threshold value Image.

Method the most according to claim 1, it is characterised in that when described mobile terminal includes the first photographic head, second takes the photograph As head with during three photographic head, described described initial preview image is carried out HDR process, generate in the middle of preview image Step, including:

Obtain a frame normal exposure preview image of described first camera collection, a frame overexposure of described second camera collection One frame of preview image and described 3rd camera collection is owed to expose preview image；

Described normal exposure preview image, described overexposure preview image and described deficient exposure preview image are carried out image synthesis, raw Become described middle preview image；

9. a mobile terminal, including photographic head, it is characterised in that described mobile terminal also includes:

Receiver module, is used for receiving pan-shot instruction；

Detection module, for each frame initial preview image gathered for described photographic head, detects this frame initial preview figure As whether corresponding photographed scene is backlight scene；

When described detection module, processing module, for detecting that the photographed scene that described initial preview image is corresponding is backlight scene Time, described initial preview image is carried out HDR process, generates middle preview image；

Generation module, for all initial preview images being under non-backlight scene of being gathered by described photographic head be in The middle preview image processed through described processing module under backlight scene carries out image mosaic according to gathering sequencing, generates Target panoramic picture.

Mobile terminal the most according to claim 9, it is characterised in that described detection module includes:

First obtains submodule, for obtaining the half-tone information of this frame initial preview image；

Generate submodule, for the described half-tone information obtained based on described acquisition submodule, generate grey level histogram；

Divide submodule, for the order being incremented by according to gray value by described grey level histogram generated by described generation submodule It is divided into N number of region；

Determine submodule, the gray value in the described N number of region for dividing based on described division submodule, determine that this frame is the most pre- Whether the photographed scene that image of looking at is corresponding is backlight scene；

11. mobile terminals according to claim 10, it is characterised in that when described grey level histogram includes according to gray value When first area, second area and three regions that the order being incremented by is arranged in order, described determine that submodule includes:

First processing unit, for adding up the pixel number that each gray value in described first area is corresponding, determines and has First gray value of big pixel number, and add up pixel number N1 of described first gray value；

Second processing unit, for adding up the pixel number that each gray value in described second area is corresponding, determines and has Second gray value of big pixel number, and add up pixel number N2 of described second gray value；

3rd processing unit, for adding up the pixel number that in described 3rd region, each gray value is corresponding, determines and has 3rd gray value of big pixel number, and add up pixel number N3 of described 3rd gray value；

First determines unit, for when N1 is more than N2 more than N2 and N3, determining the shooting field that this frame initial preview image is corresponding Scape is backlight scene.

12. mobile terminals according to claim 10, it is characterised in that when described grey level histogram includes according to gray value When first area, second area and three regions that the order being incremented by is arranged in order, described determine that submodule includes:

First computing unit, for calculating the quantity sum of all pixels in described first area and described 3rd region, To the first pixel and value；

Second computing unit, is used for calculating all pixels in described first area, described second area and described 3rd region Quantity sum, obtain the second pixel and value；

3rd computing unit, by calculating based on described first pixel and value and described second that described first computing unit obtains Calculate described second pixel and the ratio of value that unit obtains, obtain pixel ratio；

Comparing unit, for comparing the described pixel ratio that described 3rd computing unit obtains with predetermined threshold value；

Second determines unit, is used for when the comparative result of described comparing unit is that described pixel ratio is more than described predetermined threshold value Time, determine that the photographed scene that this frame initial preview image is corresponding is backlight scene.

13. mobile terminals according to claim 10, it is characterised in that when described grey level histogram includes according to gray value When first area, second area and three regions that the order being incremented by is arranged in order, described determine that submodule includes:

4th computing unit, for calculating each gray value of described first area and the corresponding pixel number sum of products, Obtain first and value；

5th computing unit, for calculating described first and value and the ash of described first area that described 4th computing unit obtains The ratio of total number of angle value, obtains the first reference value M1；

6th computing unit, for calculating each gray value of described second area and the corresponding pixel number sum of products, Obtain second and value；

7th computing unit, for calculating described second and value and the ash of described second area that described 6th computing unit obtains The ratio of total number of angle value, obtains the second reference value M2；

8th computing unit, for calculating each gray value in described 3rd region and the corresponding pixel number sum of products, Obtain the 3rd and value；

9th computing unit, for calculating the described 3rd and value and the ash in described 3rd region that described 8th computing unit obtains The ratio of total number of angle value, obtains the 3rd reference value M3；

3rd determines unit, for when M1 is more than M2 less than M2 and M3, determining the shooting field that this frame initial preview image is corresponding Scape is backlight scene.

14. mobile terminals according to claim 9, it is characterised in that when described mobile terminal includes a photographic head, Described processing module includes:

Extract submodule, for extracting the overexposure area image in described initial preview image and owing to expose area image；

First processes submodule, bright to presetting for reducing the brightness of the described overexposure area image that described extraction submodule extracts Angle value；

Second processes submodule, carries out at luminance compensation for the described deficient exposure area image extracting described extraction submodule Reason；

3rd processes submodule, for based on the overexposure after the region of normal exposure area image in described initial preview image, process Area image and deficient exposure area image, generate described middle preview image；

15. mobile terminals according to claim 9, it is characterised in that when described mobile terminal include the first photographic head and During second camera, described processing module includes:

Second obtains submodule, for obtaining frame normal exposure preview image and a frame of described first photographic head continuous acquisition Owe to expose preview image；

3rd obtains submodule, for obtaining the frame overexposure preview image that described second camera gathers；

First synthon module, for by described second obtain submodule obtain described normal exposure preview image, described owe The described overexposure preview image exposing preview image and described 3rd acquisition submodule acquisition carries out image synthesis, generates described centre Preview image；

16. mobile terminals according to claim 9, it is characterised in that when described mobile terminal include the first photographic head, When two photographic head and three photographic head, described processing module includes:

4th obtain submodule, for obtain a frame normal exposure preview image of described first camera collection, described second One frame overexposure preview image of camera collection and a frame of described 3rd camera collection are owed to expose preview image；

Second synthon module, for the described normal exposure preview image obtained by described 4th acquisition module, described overexposure Preview image and described deficient exposure preview image carry out image synthesis, generate described middle preview image；