CN105872148B

CN105872148B - A kind of generation method and mobile terminal of high dynamic range images

Info

Publication number: CN105872148B
Application number: CN201610466210.9A
Authority: CN
Inventors: 殷求明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2016-06-21
Filing date: 2016-06-21
Publication date: 2019-05-17
Anticipated expiration: 2036-06-21
Also published as: CN105872148A

Abstract

The present invention provides a kind of generation method of high dynamic range images and mobile terminals, wherein mobile terminal includes the first camera and second camera, this method comprises: obtaining the first image that the first camera acquires reference object in the first time for exposure, and obtain the second image and third image that second camera successively acquires reference object within the first time for exposure；Image procossing is carried out to the first image, the second image and third image, generates target high dynamic range images；Wherein, the first image, the second image and third image are respectively normal exposure image, overexposure image and owe to expose one of image.The embodiment of the present invention carries out image procossing according to the image of overexposure, deficient exposure and normal exposure, so that each frame image of output carries high dynamic range effect, the shooting for promoting user is experienced.

Description

A kind of generation method and mobile terminal of high dynamic range images

Technical field

The present invention relates to the generation methods and movement of field of communication technology more particularly to a kind of high dynamic range images eventually End.

Background technique

HDR (High-Dynamic Range, high dynamic range) can provide more dynamics compared to common image Range and image detail and image seen by person are relatively.The existing general embodiment of HDR technology are as follows: open camera And it is switched to HDR mode, the 3A algorithm of default is run, click is taken pictures, and different EV (Exposure Values, exposure is arranged Value), the original RAW data an of normal exposure are grabbed, the RAW data of an overexposure, one is owed the RAW data exposed, then Into image signal process process, the yuv data of a normal exposure is got, the yuv data of an overexposure, one is owed exposure Yuv data is synthesized a yuv data using HDR algorithm, and is saved using jpeg format compression.

Single camera can only clapped due to that cannot obtain normal exposure, overexposure simultaneously and owe the image data exposed According to when different exposure values is set separately, then successively grab the image data of different exposures, then realize HDR algorithm close At.The effect of HDR can not be presented in real time when preview to user.

Summary of the invention

The embodiment of the present invention provides the generation method and mobile terminal of a kind of high dynamic range images, to solve the prior art In the problem of high dynamic range effect image can not be presented in real time in preview image.

In a first aspect, the embodiment of the present invention provides a kind of generation method of high dynamic range images, it is applied to mobile terminal, Mobile terminal includes the first camera and second camera, this method comprises:

The first image that the first camera acquires reference object in the first time for exposure is obtained, and obtains second camera The second image and third image that reference object is successively acquired within the first time for exposure；

Image procossing is carried out to the first image, the second image and third image, generates target high dynamic range images；

Wherein, the first image, the second image and third image are respectively normal exposure image, overexposure image and owe to expose image One of.

Second aspect, the embodiment of the present invention also provide a kind of mobile terminal, and mobile terminal includes the first camera and second Camera, mobile terminal further include:

Acquisition module, the first image that reference object is acquired in the first time for exposure for obtaining the first camera, and Obtain the second image and third image that second camera successively acquires reference object within the first time for exposure；

Processing module, for carrying out image procossing to the first image, the second image and third image that obtain module acquisition, Generate target high dynamic range images；

In this way, overexposure is obtained within the first time for exposure using dual camera in the embodiment of the present invention, owes to expose and normally expose The image of light is obtained present frame and is exported image according to three images using high dynamic range images algorithm composograph information, It is all the image for carrying out the synthesis of high dynamic range images algorithm that each frame output image, which may be implemented, and each frame output image is all certainly Effect with high dynamic range, and make user during shooting, the high dynamic range images effect that preview is seen is exactly The effect finally shot promotes the shooting experience of user.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 shows the flow charts of the generation method of the high dynamic range images of the embodiment of the present invention one；

Fig. 2 indicates the flow chart of the generation method of the high dynamic range images of the embodiment of the present invention two；

Fig. 3 indicates the flow chart of the generation method of the high dynamic range images of the embodiment of the present invention two；

One of the structure chart of mobile terminal of Fig. 4 expression embodiment of the present invention three；

Fig. 5 indicates the two of the structure chart of the mobile terminal of the embodiment of the present invention three；

Fig. 6 indicates the three of the structure chart of the mobile terminal of the embodiment of the present invention three；

Fig. 7 indicates the structural block diagram of the mobile terminal of the embodiment of the present invention four；

Fig. 8 shows the structural block diagrams of the mobile terminal of the embodiment of the present invention five.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

Embodiment one

As shown in Figure 1, the embodiment of the present invention one provides a kind of generation method of high dynamic range images, it is applied to mobile whole End, mobile terminal include the first camera and second camera, this method comprises:

Step 101 obtains the first image for acquire in the first time for exposure to reference object of the first camera, and acquisition the The second image and third image that two cameras successively acquire reference object within the first time for exposure.

When detecting the preview interface for entering shooting, needs to send parameter configuration respectively to two cameras, make The first camera is obtained within the first time for exposure, obtains the first image for being directed to reference object, second camera is in the first exposure In time, the second image and third image for being directed to reference object are obtained.These three images that two of them camera obtains Exposure is different, these three images are the image for same reference object.And these three images be respectively overexposure image, it is normal One of exposure image and deficient exposure image.

Step 102 carries out image procossing to the first image, the second image and third image, generates target high dynamic range Image.

After obtaining the first image, the second image and third image, high dynamic range is used for these three images Image algorithm carrys out composograph information, generates target high dynamic range images.The image information wherein synthesized can be in preview circle Face shown, so that user can be with live preview shooting effect, and the mesh that the effect of the shooting of preview namely ultimately generates The effect of absolute altitude dynamic image improves the shooting experience of user.

The generation method of the high dynamic range images of the embodiment of the present invention is obtained within the first time for exposure using dual camera It takes overexposure, owe to expose and the image of normal exposure, according to three images, using high dynamic range images algorithm composograph information, It obtains present frame and exports image, it is all the figure for carrying out the synthesis of high dynamic range images algorithm that each frame output image, which may be implemented, Picture, the effect of each all included high dynamic range of frame output image, and make user during shooting, the height that preview is seen Dynamic image effect is exactly the effect finally shot, promotes the shooting experience of user.

Embodiment two

As shown in Fig. 2, being applied to mobile whole second embodiment of the present invention provides a kind of generation method of high dynamic range images End, mobile terminal include the first camera and second camera, this method comprises:

Step 201 obtains the first image for acquire in the first time for exposure to reference object of the first camera, and acquisition the The second image and third image that two cameras successively acquire reference object within the first time for exposure.

When detecting the preview interface for entering shooting, need to send parameter configuration respectively to two cameras, It include aperture, exposure time and exposure gain in the parameter configuration sent respectively to the first camera and second camera. The first parameter configuration wherein is sent to the first camera, sends the second parameter configuration and third ginseng to second camera Number configuration information, and these three parameter configurations are not identical.

First camera within the first time for exposure, obtains according to the first parameter configuration and is directed to the first of reference object Image, second camera within the first time for exposure, obtain needle according to the second parameter configuration and third parameter configuration To the second image and third image of reference object.The exposure for these three images that two of them camera obtains is different, this Three images are the image for same reference object.And these three images be respectively overexposure image, normal exposure image and It owes to expose one of image.

The classification of three kinds of images is once elaborated below:

One: the first image of situation is overexposure image, and the second image is normal exposure image, and third image is to owe to expose figure Picture.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the first of the first image exposes Between light time with N times of product of the second time for exposure and the second exposure gain that the product of the first exposure gain is the second image, The third time for exposure of third image and the product of third exposure gain are the second time for exposure and the second exposure of the second image 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the One camera exports the first image of overexposure, and the first time for exposure was S, the first exposure gain is iso, and second camera is in S Time in export respectively normal exposure the second image and owe expose third image.Second time for exposure of the second image is 1/ 2S, the second exposure gain are iso, and the third time for exposure of third image is 1/2S, and third exposure gain is 1/2iso.

The product of the first time for exposure S and the first exposure gain iso of the first image are the second exposures of the second image at this time Twice of the product of 1/2S and the second exposure gain iso between light time, the third time for exposure 1/2S and third of third image expose The product of gain 1/2iso is the 1/2 of the product of the second time for exposure 1/2S and the second exposure gain iso of the second image.

Or first camera output overexposure the first image, the first time for exposure was S, the first exposure gain is iso, the Two cameras export the second image of normal exposure respectively in the time of S and owe the third image exposed.The second of second image Time for exposure is 3/4S, the second exposure gain is 2/3 times of iso, and the third time for exposure of third image is 1/4S, and third exposure increases Benefit is iso.

The product of the first time for exposure S and the first exposure gain iso of the first image are the second exposures of the second image at this time Twice of the product of 3/4S and the second exposure gain 2/3iso between light time, the third time for exposure 1/4S and third of third image expose The product of gain of light iso is the 1/2 of the product of the second time for exposure 3/4S and the second exposure gain 2/3iso of the second image.

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then the first image The first aperture light-inletting quantity, the first time for exposure and the first exposure gain three product be the second aperture entering light of the second image N times of amount, the product of the second time for exposure and the second exposure gain three, the second aperture light-inletting quantity of third image, third exposure It is exposed for the second aperture light-inletting quantity of the second image, the second time for exposure with second between light time with the product of third exposure gain three 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.First camera exports the first image of overexposure, and first Time for exposure is S, the first exposure gain is iso, and second camera exports the second image of normal exposure respectively in the time of S With the third image of deficient exposure.Second time for exposure of the second image is 1/2S, and the second exposure gain is 2iso, the of third image Three time for exposure were 1/2S, and third exposure gain is iso.

The first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image, the first exposure increase at this time The product of beneficial iso is the second aperture entering light coefficient of discharge 1 of the second image, the exposure of the second time for exposure 1/2S of the second image and second Twice of the product of gain of light 2iso, the third time for exposure 1/ of the second aperture entering light coefficient of discharge 1 of third image, third image 2S, third exposure gain iso product be the second aperture entering light coefficient of discharge 1 of the second image, the second image second exposure when Between 1/2S, the second exposure gain 2iso product 1/2.

Or first camera output overexposure the first image, the first time for exposure was S, the first exposure gain is iso, the Two cameras export the second image of normal exposure respectively in the time of S and owe the third image exposed.The second of second image Time for exposure is 3/4S, the second exposure gain is 4/3 times of iso, and the third time for exposure of third image is 1/4S, and third exposure increases Benefit is 2iso.

The first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image, the first exposure increase at this time The product of beneficial iso is the second aperture entering light coefficient of discharge 1 of the second image, the exposure of the second time for exposure 3/4S of the second image and second Twice of the product of gain of light 4/3iso, the third time for exposure of the second aperture entering light coefficient of discharge 1 of third image, third image 1/4S, third exposure gain 2iso product be the second aperture entering light coefficient of discharge 1 of the second image, the second image second exposure The 1/2 of the product of time 3/4S, the second exposure gain 4/3iso.

Situation two:

First image is overexposure image, and the second image is to owe to expose image, and third image is normal exposure image.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the first of the first image exposes Between light time with N times of product of third time for exposure and third exposure gain that the product of the first exposure gain is third image, Second time for exposure of the second image and the product of the second exposure gain are that the third time for exposure of third image and third expose 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the One camera exports the first image of overexposure, and the first time for exposure was S, the first exposure gain is iso, and second camera is in S Time in export respectively normal exposure third image and owe expose the second image.The third time for exposure of third image is 1/ 2S, third exposure gain are iso, and the second time for exposure of the second image is 1/2S, and the second exposure gain is 1/2iso.

The product of the first time for exposure S and the first exposure gain iso of the first image are that the third of third image exposes at this time Twice of the product of 1/2S and third exposure gain iso between light time, the exposure of the second time for exposure 1/2S of the second image and second The product of gain 1/2iso is the 1/2 of the product of the third time for exposure 1/2S and third exposure gain iso of third image.

Or first camera output overexposure the first image, the first time for exposure was S, the first exposure gain is iso, the Two cameras export the third image of normal exposure respectively in the time of S and owe the second image exposed.The third of third image Time for exposure is 3/4S, third exposure gain is 2/3 times of iso, and the second time for exposure of the second image is 1/4S, and the second exposure increases Benefit is iso.

The product of the first time for exposure S and the first exposure gain iso of the first image are that the third of third image exposes at this time Twice of the product of 3/4S and third exposure gain 2/3iso between light time, the second time for exposure 1/4S of the second image and second expose The product of gain of light iso is the 1/2 of the product of the third time for exposure 3/4S and third exposure gain 2/3iso of third image.

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then the first image The first aperture light-inletting quantity, the first time for exposure and the first exposure gain three product be the second aperture entering light of third image N times of amount, the product of third time for exposure and third exposure gain three, the second aperture light-inletting quantity of the second image, the second exposure It is exposed between light time with the product of the second exposure gain three for the second aperture light-inletting quantity of third image, third time for exposure and third 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.First camera exports the first image of overexposure, and first Time for exposure is S, the first exposure gain is iso, and second camera exports the third image of normal exposure respectively in the time of S With the second image of deficient exposure.The third time for exposure of third image is 1/2S, and third exposure gain is 2iso, the of the second image Two time for exposure were 1/2S, and the second exposure gain is iso.

The first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image, the first exposure increase at this time The product of beneficial iso is that the second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 1/2S of third image and third expose Twice of the product of gain of light 2iso, the second time for exposure 1/ of the second aperture entering light coefficient of discharge 1 of the second image, the second image 2S, the second exposure gain iso product be the third aperture entering light coefficient of discharge 1 of third image, third image third exposure when Between 1/2S, third exposure gain 2iso product 1/2.

Or first camera output overexposure the first image, the first time for exposure was S, the first exposure gain is iso, the Two cameras export the third image of normal exposure respectively in the time of S and owe the second image exposed.The third of third image Time for exposure is 3/4S, third exposure gain is 4/3 times of iso, and the second time for exposure of the second image is 1/4S, and the second exposure increases Benefit is 2iso.

The first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image, the first exposure increase at this time The product of beneficial iso is that the second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 3/4S of third image and third expose Twice of the product of gain of light 4/3iso, the second time for exposure of the second aperture entering light coefficient of discharge 1 of the second image, the second image 1/4S, the second exposure gain 2iso product be the third aperture entering light coefficient of discharge 1 of third image, third image third exposure The 1/2 of the product of time 3/4S, third exposure gain 4/3iso.

Three: the first image of situation is normal exposure image, and the second image is overexposure image, and third image is to owe to expose figure Picture.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the second of the second image exposes Between light time with N times of product of the first time for exposure and the first exposure gain that the product of the second exposure gain is the first image, The third time for exposure of third image and the product of third exposure gain are the first time for exposure and the first exposure of the first image 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the One camera exports the first image of normal exposure, and the first time for exposure was S, the first exposure gain is iso, second camera It exports the second image of overexposure respectively in the time of S and owes the third image exposed.Second time for exposure of the second image is 1/ 2S, the second exposure gain are 4iso, and the third time for exposure of third image is 1/2S, and third exposure gain is iso.

The product of the second time for exposure 1/2S and the second exposure gain 4iso of the second image are the of the first image at this time Twice of the product of one time for exposure S and the first exposure gain iso, the third time for exposure 1/2S and third of third image expose The product of gain iso is the 1/2 of the product of the first time for exposure S and the first exposure gain iso of the first image.

Or first camera output normal exposure the first image, the first time for exposure was S, the first exposure gain is Iso, second camera export the second image of overexposure respectively in the time of S and owe the third image exposed.The of second image Two time for exposure were 3/4S, the second exposure gain is 8/3 times of iso, and the third time for exposure of third image is 1/4S, third exposure Gain is 2iso.

The product of the second time for exposure 3/4S and the second exposure gain 8/3iso of the second image are the first images at this time Twice of the product of first time for exposure S and the first exposure gain iso, the third time for exposure 1/4S and third of third image expose The product of gain of light 2iso is the 1/2 of the product of the first time for exposure S and the first exposure gain iso of the first image.

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then the second image The second aperture light-inletting quantity, the second time for exposure and the second exposure gain three product be the first aperture entering light of the first image N times of amount, the product of the first time for exposure and the first exposure gain three, the second aperture light-inletting quantity of third image, third exposure It is exposed for the first aperture light-inletting quantity of the first image, the first time for exposure with first between light time with the product of third exposure gain three 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.First camera exports the first image of normal exposure, and First time for exposure was S, the first exposure gain is iso, and second camera exports the second image of overexposure respectively in the time of S With the third image of deficient exposure.Second time for exposure of the second image is 1/2S, and the second exposure gain is 8iso, the of third image Three time for exposure were 1/2S, and third exposure gain is 2iso.

Second aperture entering light coefficient of discharge 1 of the second image, the second time for exposure 1/2S of the second image, the second exposure at this time The product of gain 8iso is the first aperture entering light coefficient of discharge 2 of the first image, the exposure of the first time for exposure S of the first image and first Twice of the product of gain of light iso, the third time for exposure 1/ of the second aperture entering light coefficient of discharge 1 of third image, third image 2S, third exposure gain 2iso product be the first aperture entering light coefficient of discharge 2 of the first image, the first image first exposure when Between S, the first exposure gain iso product 1/2.

Or first camera output normal exposure the first image, the first time for exposure was S, the first exposure gain is Iso, second camera export the second image of overexposure respectively in the time of S and owe the third image exposed.The of second image Two time for exposure were 3/4S, the second exposure gain is 16/3 times of iso, and the third time for exposure of third image is 1/4S, and third exposes The gain of light is 4iso.

Second aperture entering light coefficient of discharge 1 of the second image, the second time for exposure 3/4S of the second image, the second exposure at this time The product of gain 16/3iso is the first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image and Twice of the product of one exposure gain iso, when the second aperture entering light coefficient of discharge 1 of third image, the third of third image expose Between 1/4S, third exposure gain 4iso product be the first aperture entering light coefficient of discharge 2 of the first image, the first image first expose The 1/2 of the product of S, the first exposure gain iso between light time.

Four: the first image of situation is normal exposure image, and the second image is to owe to expose image, and third image is overexposure figure Picture.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the third of third image exposes Between light time with N times of product of the first time for exposure and the first exposure gain that the product of third exposure gain is the first image, Second time for exposure of the second image and the product of the second exposure gain are the first time for exposure and the first exposure of the first image 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the One camera exports the first image of normal exposure, and the first time for exposure was S, the first exposure gain is iso, second camera The third image of the second image exposed and overexposure is owed in output respectively in the time of S.Second time for exposure of the second image is 1/ 2S, the second exposure gain are iso, and the third time for exposure of third image is 1/2S, and third exposure gain is 4iso.

The product of the third time for exposure 1/2S and third exposure gain 4iso of third image are the of the first image at this time Twice of the product of one time for exposure S and the first exposure gain iso, the exposure of the second time for exposure 1/2S of the second image and second The product of gain iso is the 1/2 of the product of the first time for exposure S and the first exposure gain iso of the first image.

Or first camera output normal exposure the first image, the first time for exposure was S, the first exposure gain is Iso, the third image of the second image exposed and overexposure is owed in output to second camera respectively in the time of S.The of second image Two time for exposure were 1/4S, the second exposure gain is 2 times of iso, and the third time for exposure of third image is 3/4S, and third exposure increases Benefit is 8/3iso.

The product of the third time for exposure 3/4S and the second exposure gain 8/3iso of third image are the first images at this time Twice of the product of first time for exposure S and the first exposure gain iso, the second time for exposure 1/4S of the second image and second expose The product of gain of light 2iso is the 1/2 of the product of the first time for exposure S and the first exposure gain iso of the first image.

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then third image The second aperture light-inletting quantity, third time for exposure and third exposure gain three product be the first aperture entering light of the first image N times of amount, the product of the first time for exposure and the first exposure gain three, the second aperture light-inletting quantity of the second image, the second exposure It is exposed for the first aperture light-inletting quantity of the first image, the first time for exposure with first between light time with the product of the second exposure gain three 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.First camera exports the first image of normal exposure, and First time for exposure was S, the first exposure gain is iso, and the second image exposed is owed in output to second camera respectively in the time of S With the third image of overexposure.Second time for exposure of the second image is 1/2S, and the second exposure gain is 2iso, the of third image Three time for exposure were 1/2S, and third exposure gain is 8iso.

Second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 1/2S of third image, third exposure at this time The product of gain 8iso is the first aperture entering light coefficient of discharge 2 of the first image, the exposure of the first time for exposure S of the first image and first Twice of the product of gain of light iso, the second time for exposure 1/ of the second aperture entering light coefficient of discharge 1 of the second image, the second image 2S, the second exposure gain 2iso product be the first aperture entering light coefficient of discharge 2 of the first image, the first image first exposure when Between S, the first exposure gain iso product 1/2.

Or first camera output normal exposure the first image, the first time for exposure was S, the first exposure gain is Iso, the third image of the second image exposed and overexposure is owed in output to second camera respectively in the time of S.The of second image Two time for exposure were 1/4S, the second exposure gain is 4 times of iso, and the third time for exposure of third image is 3/4S, and third exposure increases Benefit is 16/3iso.

Second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 3/4S of third image, third exposure at this time The product of gain 16/3iso is the first aperture entering light coefficient of discharge 2 of the first image, the first time for exposure S of the first image and Twice of the product of one exposure gain iso, when the second aperture entering light coefficient of discharge 1 of the second image, the second of the second image expose Between 1/4S, the second exposure gain 4iso product be the first aperture entering light coefficient of discharge 2 of the first image, the first image first expose The 1/2 of the product of S, the first exposure gain iso between light time.

Five: the first image of situation is to owe to expose image, and the second image is normal exposure image, and third image is overexposure figure Picture.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the third of third image exposes Between light time with N times of product of the second time for exposure and the second exposure gain that the product of third exposure gain is the second image, First time for exposure of the first image and the product of the first exposure gain are the second time for exposure and the second exposure of the second image 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the The first image exposed is owed in the output of one camera, and the first time for exposure was S, the first exposure gain is 1/2iso, second camera Export the second image of normal exposure and the third image of overexposure respectively in the time of S.Second time for exposure of the second image For 1/2S, the second exposure gain is 2iso, and the third time for exposure of third image is 1/2S, and third exposure gain is 4iso.

The product of the third time for exposure 1/2S and third exposure gain 4iso of third image are the of the second image at this time Twice of the product of two time for exposure 1/2S and the second exposure gain 2iso, the first time for exposure S of the first image and first expose The product of gain of light 1/2iso is the 1/2 of the product of the second time for exposure 1/2S and the second exposure gain 2iso of the second image.

Or first camera output owe expose the first image, the first time for exposure was S, the first exposure gain is 1/ 2iso, second camera export the second image of normal exposure and the third image of overexposure respectively in the time of S.Second image The second time for exposure be 1/4S, the second exposure gain is 4 times of iso, the third time for exposure of third image is 3/4S, and third exposes The gain of light is 3/8iso.

The product of the third time for exposure 3/4S and third exposure gain 8/3iso of third image are the second images at this time Twice of the product of second time for exposure 1/4S and the second exposure gain 4iso, the first time for exposure S of the first image and first The product of exposure gain 1/2iso is the 1/ of the product of the second time for exposure 1/4S and the second exposure gain 4iso of the second image 2。

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then third image The second aperture light-inletting quantity, third time for exposure and third exposure gain three product be the second aperture entering light of the second image N times of amount, the product of the second time for exposure and the second exposure gain three, the first aperture light-inletting quantity of the first image, the first exposure It is exposed for the second aperture light-inletting quantity of the second image, the second time for exposure with second between light time with the product of the first exposure gain three 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.The first image exposed, and first are owed in the output of first camera Time for exposure is S, the first exposure gain is 1/2iso, and second camera exports the second of normal exposure respectively in the time of S The third image of image and overexposure.Second time for exposure of the second image is 1/2S, and the second exposure gain is 4iso, third image The third time for exposure be 1/2S, third exposure gain be 8iso.

Second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 1/2S of third image, third exposure at this time The product of gain 8iso is the second aperture entering light coefficient of discharge 1 of the second image, the second time for exposure 1/2S of the second image and Twice of the product of two exposure gain 4iso, when the first aperture entering light coefficient of discharge 2 of the first image, the first of the first image expose Between S, the first exposure gain 1/2iso product be the second aperture entering light coefficient of discharge 1 of the second image, the second image second expose The 1/2 of the product of 1/2S, the second exposure gain 4iso between light time.

Or first camera output owe expose the first image, the first time for exposure was S, the first exposure gain is 1/ 2iso, second camera export the second image of normal exposure and the third image of overexposure respectively in the time of S.Second image The second time for exposure be 1/4S, the second exposure gain is 8 times of iso, the third time for exposure of third image is 3/4S, and third exposes The gain of light is 16/3iso.

Second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 3/4S of third image, third exposure at this time The product of gain 16/3iso be the second aperture entering light coefficient of discharge 1 of the second image, the second image the second time for exposure 1/4S with Twice of the product of second exposure gain 8iso, the first exposure of the first aperture entering light coefficient of discharge 2, the first image of the first image Time S, the first exposure gain 1/2iso product be the second aperture entering light coefficient of discharge 1 of the second image, the second image second The 1/2 of the product of time for exposure 1/4S, the second exposure gain 8iso.

Six: the first image of situation is to owe to expose image, and the second image is overexposure image, and third image is normal exposure diagram Picture.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.First aperture F value of the first camera is identical with the second aperture F value value of second camera, and the second of the second image exposes Between light time with N times of product of third time for exposure and third exposure gain that the product of the second exposure gain is third image, First time for exposure of the first image and the product of the first exposure gain are that the third time for exposure of third image and third expose 1/N times of the product of gain, wherein the value range of N is 2≤N≤4.

Such as: in the first aperture F value of the first camera and identical the second aperture F value value of second camera, the The first image exposed is owed in the output of one camera, and the first time for exposure was S, the first exposure gain is 1/2iso, second camera Export the second image of overexposure and the third image of normal exposure respectively in the time of S.Second time for exposure of the second image For 1/2S, the second exposure gain is 4iso, and the third time for exposure of third image is 1/2S, and third exposure gain is 2iso.

The product of the second time for exposure 1/2S and the second exposure gain 4iso of the second image are the of third image at this time Twice of the product of three time for exposure 1/2S and third exposure gain 2iso, the first time for exposure S of the first image and first expose The product of gain of light 1/2iso is the 1/2 of the product of the third time for exposure 1/2S and third exposure gain 2iso of third image.

Or first camera output owe expose the first image, the first time for exposure was S, the first exposure gain is 1/ 2iso, second camera export the second image of overexposure and the third image of normal exposure respectively in the time of S.Second image The second time for exposure be 3/4S, the second exposure gain is 8/3 times of iso, the third time for exposure of third image is 1/4S, third Exposure gain is 4iso.

The product of the second time for exposure 3/4S and the second exposure gain 8/3iso of the second image are third images at this time Twice of the product of third time for exposure 1/4S and third exposure gain 4iso, the first time for exposure S of the first image and first The product of exposure gain 1/2iso is the 1/ of the product of the third time for exposure 1/4S and third exposure gain 4iso of third image 2。

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.Then the second image The second aperture light-inletting quantity, the second time for exposure and the second exposure gain three product be the second aperture entering light of third image N times of amount, the product of third time for exposure and third exposure gain three, the first aperture light-inletting quantity of the first image, the first exposure It is exposed between light time with the product of the first exposure gain three for the second aperture light-inletting quantity of third image, third time for exposure and third 1/N times of the product of gain of light three, wherein the value range of N is 2≤N≤4.

Such as: in the second aperture F value that the first aperture F value of the first camera is second cameraWhen, then The light-inletting quantity of one camera is twice of second camera, and the first aperture light-inletting quantity of the first camera can be indicated with coefficient 2, Second aperture light-inletting quantity of second camera can be indicated with coefficient 1.The first image exposed, and first are owed in the output of first camera Time for exposure is S, the first exposure gain is 1/2iso, and second camera exports the second image of overexposure respectively in the time of S With the third image of normal exposure.Second time for exposure of the second image is 1/2S, and the second exposure gain is 8iso, third image The third time for exposure be 1/2S, third exposure gain be 4iso.

Second aperture entering light coefficient of discharge 1 of the second image, the second time for exposure 1/2S of the second image, the second exposure at this time The product of gain 8iso is the second aperture entering light coefficient of discharge 1 of third image, the third time for exposure 1/2S of third image and Twice of the product of three exposure gain 4iso, when the first aperture entering light coefficient of discharge 2 of the first image, the first of the first image expose Between S, the first exposure gain 1/2iso product be the second aperture entering light coefficient of discharge 1 of third image, third image third expose The 1/2 of the product of 1/2S, third exposure gain 4iso between light time.

Or first camera output owe expose the first image, the first time for exposure was S, the first exposure gain is 1/ 2iso, second camera export the second image of overexposure and the third image of normal exposure respectively in the time of S.Second image The second time for exposure be 3/4S, the second exposure gain is 16/3 times of iso, the third time for exposure of third image is 1/4S, the Three exposure gains are 8iso.

Second aperture entering light coefficient of discharge 1 of the second image, the second time for exposure 3/4S of the second image, the second exposure at this time The product of gain 16/3iso be the second aperture entering light coefficient of discharge 1 of third image, third image third time for exposure 1/4S with Twice of the product of third exposure gain 8iso, the first exposure of the first aperture entering light coefficient of discharge 2, the first image of the first image Time S, the first exposure gain 1/2iso product be the third of the second aperture entering light coefficient of discharge 1 of third image, third image The 1/2 of the product of time for exposure 1/4S, third exposure gain 8iso.

Above-mentioned six kinds of situations are in the first aperture F value of the first camera and the second aperture F value value phase of second camera Meanwhile be with the product of the time for exposure of overexposure image and exposure gain normal exposure image time for exposure and exposure gain 2 times of product, owe expose image time for exposure and exposure gain product be normal exposure image time for exposure and exposure increase It is illustrated for 1/2 times of product of benefit.

It is unequal in the first aperture F value of the first camera and the second aperture F value of second camera, with the first camera The first aperture light-inletting quantity be for 2 times of the second aperture light-inletting quantity of second camera, with the light-inletting quantity of overexposure image, exposure The product of time and exposure gain is 2 times of product of the light-inletting quantity of normal exposure image, time for exposure and exposure gain, owes to expose figure The product of the light-inletting quantity of picture, time for exposure and exposure gain is light-inletting quantity, time for exposure and the exposure gain of normal exposure image 1/2 times of product for be illustrated.

Step 202 is based on the first image, the second image and third image, determines target normal exposure image, target overexposure Image and target owe to expose image.

After obtaining the first image, the second image and third image, need to determine normal expose in these three images Light image, overexposure image and deficient exposure image.The exposure of these three images can be compared with standard exposure range, When exposure is located within the scope of standard exposure, determine that image is normal exposure image, when exposure is greater than standard exposure range It when maximum value, determines that image is overexposure image, when exposure is less than the minimum value of standard exposure range, determines that image is to owe to expose Image.

Step 203 extracts the gray scale letter that target normal exposure image, target overexposure image and target owe exposure image respectively Breath obtains the first gray level image of target normal exposure image, the second gray level image of target overexposure image and target and owes exposure figure The third gray level image of picture.

After determining that target normal exposure image, target overexposure image and target owe to expose image, for these three images Grayscale information is extracted respectively, the first gray level image is obtained for the grayscale information of target normal exposure image, for target overexposure The grayscale information of image obtains the second gray level image, and the grayscale information for owing to expose image for target obtains third gray level image.

Step 204, using the first gray level image as benchmark, the second gray level image and third gray level image are corrected to One gray level image is the image of same visual field.

Due to the first gray level image be target normal exposure image formed gray level image, need be with the first gray level image Benchmark owes the exposure third gray level image that image is formed progress to the second gray level image formed by target overexposure image and by target Correction, so that the display view angle of the first gray level image, the second gray level image and third gray level image is identical.

Such as: when target normal exposure image is shot by the first camera, target overexposure image, target owe to expose Image is shot by second camera, during being corrected on the basis of the first gray level image, need to by The second gray level image and be corrected by the third gray level image that the deficient exposure image of target is formed that target overexposure image is formed.

Owing exposure image when target is shot by the first camera, target overexposure image and target normal exposure image It is to be shot by second camera, corrected mistake on the basis of by the first gray level image of target normal exposure image Cheng Zhong needs to be corrected the third gray level image formed by the deficient exposure image of target.

When target overexposure image is shot by the first camera, target owes to expose image and target normal exposure image It is to be shot by second camera, corrected mistake on the basis of by the first gray level image of target normal exposure image Cheng Zhong needs to be corrected the second gray level image formed by target overexposure image.

Step 205 carries out image synthesis processing to the first gray level image, the second gray level image and third gray level image, raw At target high dynamic range images.

After the correction for completing gray level image, according to the first gray level image, the second gray level image and the third after correction Gray level image carries out image synthesis processing, generates target high dynamic range images, and detailed process is as shown in Figure 3:

Step 2051, for each pixel in the first gray level image, determine respectively pixel in the second gray level image and The pixel of corresponding position in third gray level image.

Pixel corresponding with pixel each in the first gray level image is determined in the second gray level image, in third gray scale Pixel corresponding with pixel each in the first gray level image is determined in image, that is, establishes same pixel in the first grayscale image Corresponding relationship in picture, the second gray level image and third gray level image.

Such as: for pixel 1 in the first gray level image, identical location lookup is to pixel in the second gray level image 1 ', identical location lookup is to pixel 1 " in third gray level image.Wherein pixel 1, pixel 1 ' and pixel 1 " For embodiment of the same pixel in different gray level images.

Step 2052 obtains first gray value of the pixel in the first gray level image, pixel in the second gray level image The second gray value and pixel of the pixel of middle corresponding position in third gray level image the pixel of corresponding position Three gray values.

Then, for each pixel, first gray value of the pixel in the first gray level image is obtained, in the second ash Spend the second gray value in image, and the third gray value in third gray level image.Wherein the range of the first gray value is 0 Between~255, the range of the second gray value is between 0~255, and the range of third gray value is also between 0~255.

First gray value, the second sum of the grayscale values third gray value three are added by step 2053, obtain gray scale and value.

The first gray value obtained for each pixel, the second sum of the grayscale values third gray value are added, obtained Gray scale and value, wherein the range of gray scale and value is between 0~765.

Step 2054 carries out gray value mapping to gray scale and value based on grey scale mapping relation table, obtains a frame high dynamic range The Continuous Tone Image enclosed.

After the gray scale and value for obtaining each pixel, ash is carried out to each gray scale and value according to grey scale mapping relation table Angle value mapping, obtains corresponding grey scale value, obtains a vertical frame dimension dynamic range according to the grey scale value of each pixel Continuous Tone Image.Wherein the range of grey scale value is between 0~255, grey scale mapping relation table be it is pre-set, according to Gray scale and value can find corresponding grey scale value, and wherein the gray scale in grey scale mapping relation table and value are according to same picture What three gray values that vegetarian refreshments obtains in normal exposure, the corresponding gray level image of under-exposure and overexposure obtained.

The color information of all pixels point in target normal exposure image is assigned in Continuous Tone Image by step 2055 Each pixel of corresponding position generates target high dynamic range images.

In the Continuous Tone Image for generating high dynamic range, according to the pixel and centre ash in target normal exposure image The corresponding relationship for spending the pixel in image, is assigned to centre for the color information of all pixels point in target normal exposure image Corresponding pixel in gray level image, finally obtains target high dynamic range images.

Embodiment three

It is not detailed in the embodiment of mobile terminal the following are a kind of embodiment for mobile terminal that the embodiment of the present invention three provides The detail content described to the greatest extent, reference can be made to the above method embodiment.

Wherein, mobile terminal includes the first camera and second camera, as shown in figure 4, mobile terminal further include:

Acquisition module 10, the first image that reference object is acquired in the first time for exposure for obtaining the first camera, And obtain the second image and third image that second camera successively acquires reference object within the first time for exposure.

Processing module 20, for carrying out image to the first image, the second image and third image that obtain the acquisition of module 10 Processing generates target high dynamic range images.

Wherein, obtaining the first image that module 10 obtains is overexposure image, and the second image is normal exposure image, and third Image is to owe to expose image.

Wherein, obtaining the first image that module 10 obtains is normal exposure image, and the second image is overexposure image, and third Image is to owe to expose image.

Wherein, when the sum of the second time for exposure of the second image and the third time for exposure of third image are equal to the first exposure Between.

Wherein, the first aperture F value of the first camera is identical with the second aperture F value value of second camera, the first figure First time for exposure of picture and the product of the first exposure gain are the second time for exposure and the second exposure gain of the second image N times of product, the third time for exposure of third image and the product of third exposure gain are the second time for exposure of the second image With 1/N times of the product of the second exposure gain, wherein the value range of N is 2≤N≤4.

Wherein, the first aperture F value of the first camera is identical with the second aperture F value value of second camera, the second figure Second time for exposure of picture and the product of the second exposure gain are the first time for exposure and the first exposure gain of the first image N times of product, the third time for exposure of third image and the product of third exposure gain are the first time for exposure of the first image With 1/N times of the product of the first exposure gain, wherein the value range of N is 2≤N≤4.

Wherein, the first aperture F value of the first camera and the second aperture F value of second camera are unequal, and first takes the photograph As the first aperture light-inletting quantity of head is M times of the second aperture light-inletting quantity of second camera, the second time for exposure of the second image It was equal to for the first time for exposure with the sum of third time for exposure of third image, the value range of M is 1 M≤4 <.

Wherein, the first aperture light-inletting quantity of the first image, the first time for exposure and the product of the first exposure gain three are N times of second aperture light-inletting quantity of the second image, the second time for exposure and the product of the second exposure gain three, third image Second aperture light-inletting quantity, third time for exposure and the product of third exposure gain three are the second aperture entering light of the second image 1/N times of amount, the product of the second time for exposure and the second exposure gain three, wherein the value range of N is 2≤N≤4.

Wherein, as shown in figure 5, processing module 20 includes:

It determines submodule 21, for being based on the first image, the second image and third image, determines target normal exposure figure Picture, target overexposure image and target owe to expose image.

Extracting sub-module 22, for extracting target normal exposure image, the target overexposure that determining submodule 21 determines respectively Image and target owe to expose the grayscale information of image, obtain the first gray level image, the target overexposure image of target normal exposure image The second gray level image and target owe expose image third gray level image.

Correction module 23, for using the first gray level image that extracting sub-module 22 obtains as benchmark, by the second gray scale Image and third gray level image are corrected to the image for the first gray level image being same visual field.

Submodule 24 is handled, the first gray level image, calibrated submodule 23 for obtaining to extracting sub-module 22 correct The second gray level image and third gray level image afterwards carries out image synthesis processing, generates target high dynamic range images.

Wherein, as shown in fig. 6, processing submodule 24 includes:

Determination unit 241, for for each pixel in the first gray level image, determining pixel in the second gray scale respectively The pixel of corresponding position in image and third gray level image.

Acquiring unit 242, it is grey second for obtaining first gray value, pixel of the pixel in the first gray level image Spend the pixel of the second gray value and the pixel corresponding position in third gray level image of the pixel of corresponding position in image The third gray value of point.

Computing unit 243, for will acquire the first gray value, the second sum of the grayscale values third gray value of the acquisition of unit 242 Three is added, and obtains gray scale and value.

Map unit 244, gray scale and value progress gray scale for being obtained based on grey scale mapping relation table to computing unit 243 Value mapping, obtains the Continuous Tone Image of a vertical frame dimension dynamic range.

Processing unit 245, it is single for the color information of all pixels point in target normal exposure image to be assigned to mapping Each pixel of corresponding position in the Continuous Tone Image that member 244 obtains, generates target high dynamic range images.

The mobile terminal of the embodiment of the present invention, obtained within the first time for exposure using dual camera overexposure, owe expose and just The image often exposed obtains present frame output figure using high dynamic range images algorithm composograph information according to three images Picture, it is all the image for carrying out the synthesis of high dynamic range images algorithm that each frame output image, which may be implemented, and each frame exports image The effect of all included high dynamic range, and make user during shooting, the high dynamic range images effect that preview is seen It is exactly the effect finally shot, promotes the shooting experience of user.

Example IV

The embodiment of the present invention four provides a kind of mobile terminal, as shown in fig. 7, mobile terminal 700 includes: at least one Manage device 701, memory 702, at least one network interface 704, user interface 703 and component 706 of taking pictures, component 706 of taking pictures packet It includes: the first camera 7061 and second camera 7062.Various components in mobile terminal 700 are coupled by bus system 705 Together.It is understood that bus system 705 is for realizing the connection communication between these components.It includes data that bus system 705, which is removed, It further include power bus, control bus and status signal bus in addition except bus.It, will in Fig. 7 but for the sake of clear explanation Various buses are all designated as bus system 705.

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

It is appreciated that the memory 702 in the embodiment of the present invention can be volatile memory or nonvolatile memory, It or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can be read-only memory (Read- OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM (ErasablePROM, EPROM), electrically erasable programmable read-only memory (ElectricallyEPROM, EEPROM) dodge It deposits.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is slow to be used as external high speed It deposits.By exemplary but be not restricted explanation, the RAM of many forms is available, such as static random access memory (StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory (SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate SDRAM, DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links Dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory (DirectRambusRAM, DRRAM).The memory 702 of system and method described herein be intended to include but be not limited to these and The memory of any other suitable type.

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

Wherein, operating system 7021 include various system programs, such as ccf layer, core library layer, driving layer etc., are used for Realize various basic businesses and the hardware based task of processing.Application program 7022 includes various application programs, such as shows Controller, media player (MediaPlayer), browser (Browser) etc., for realizing various applied business.Realize this The program of inventive embodiments method may be embodied in application program 7022.

In embodiments of the present invention, by the program or instruction of calling memory 702 to store, specifically, can be application The program or instruction stored in program 7022, processor 701 is for obtaining the first camera in the first time for exposure to shooting pair As the first image of acquisition, and obtain the second image that second camera successively acquires reference object within the first time for exposure With third image；Image procossing is carried out to the first image, the second image and third image, generates target high dynamic range images； Wherein, the first image, the second image and third image are respectively normal exposure image, overexposure image and owe to expose one in image Kind.

The method that the embodiments of the present invention disclose can be applied in processor 701, or be realized by processor 701. Processor 701 may be a kind of IC chip, the processing capacity with signal.During realization, the above method it is each Step can be completed by the integrated logic circuit of the hardware in processor 701 or the instruction of software form.Above-mentioned processing Device 701 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), specific integrated circuit (ApplicationSpecific IntegratedCircuit, ASIC), ready-made programmable gate array (FieldProgrammableGateArray, FPGA) either other programmable logic device, discrete gate or transistor logic Device, discrete hardware components.It may be implemented or execute disclosed each method, step and the logical box in the embodiment of the present invention Figure.General processor can be microprocessor or the processor is also possible to any conventional processor etc..In conjunction with the present invention The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and execute completion, or use decoding processor In hardware and software module combination execute completion.Software module can be located at random access memory, and flash memory, read-only memory can In the storage medium of this fields such as program read-only memory or electrically erasable programmable memory, register maturation.The storage Medium is located at memory 702, and processor 701 reads the information in memory 702, and the step of the above method is completed in conjunction with its hardware Suddenly.

It is understood that embodiments described herein can with hardware, software, firmware, middleware, microcode or its Combination is to realize.For hardware realization, processing unit be may be implemented in one or more specific integrated circuit (Application SpecificIntegratedCircuits, ASIC), digital signal processor (DigitalSignalProcessing, DSP), Digital signal processing appts (DSPDevice, DSPD), programmable logic device (ProgrammableLogicDevice, PLD), Field programmable gate array (Field-ProgrammableGateArray, FPGA), general processor, controller, microcontroller In device, microprocessor, other electronic units for executing herein described function or combinations thereof.

For software implementations, it can be realized herein by executing the module (such as process, function etc.) of function described herein The technology.Software code is storable in memory and is executed by processor.Memory can in the processor or It is realized outside processor.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First image is overexposure image, and the second image is normal exposure image, and third image is to owe to expose image.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First image is normal exposure image, and the second image is overexposure image, and third image is to owe to expose image.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, The sum of second time for exposure and the third time for exposure of third image of second image were equal to for the first time for exposure.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera is identical with the second aperture F value value of second camera, the first image first exposure when Between N times with the product of the second time for exposure and the second exposure gain that the product of the first exposure gain is the second image, third The third time for exposure of image and the product of third exposure gain are the second time for exposure and the second exposure gain of the second image 1/N times of product, wherein the value range of N is 2≤N≤4.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera is identical with the second aperture F value value of second camera, the second image second exposure when Between N times with the product of the first time for exposure and the first exposure gain that the product of the second exposure gain is the first image, third The third time for exposure of image and the product of third exposure gain are the first time for exposure and the first exposure gain of the first image 1/N times of product, wherein the value range of N is 2≤N≤4.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera and the second aperture F value of second camera are unequal, and the first aperture of the first camera Light-inletting quantity is M times of the second aperture light-inletting quantity of second camera, the of the second time for exposure of the second image and third image The sum of three time for exposure were equal to for the first time for exposure, and the value range of M is 1 M≤4 <.

Optionally, the first figure that processor 701 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, The first aperture light-inletting quantity, the first time for exposure and the product of the first exposure gain three of first image are the second of the second image Aperture light-inletting quantity, N times of product of the second time for exposure and the second exposure gain three, the second aperture entering light of third image When amount, third time for exposure and the product of third exposure gain three are the second aperture light-inletting quantity of the second image, the second exposure Between 1/N times with the product of the second exposure gain three, wherein the value range of N is 2≤N≤4.

Optionally, processor 701 is carrying out image procossing to the first image, the second image and third image, generates target When high dynamic range images, be also used to: based on the first image, the second image and third image, determine target normal exposure image, Target overexposure image and target owe to expose image；Target normal exposure image, target overexposure image and target is extracted respectively to owe to expose figure The grayscale information of picture, obtain the first gray level image of target normal exposure image, the second gray level image of target overexposure image and Target owes to expose the third gray level image of image；Using the first gray level image as benchmark, by the second gray level image and third grayscale image As correction to the image for the first gray level image being same visual field；To the first gray level image, the second gray level image and third gray scale Image carries out image synthesis processing, generates target high dynamic range images.

Optionally, processor 701 is carrying out image conjunction to the first gray level image, the second gray level image and third gray level image It is also used to when generating target high dynamic range images at processing: for each pixel in the first gray level image, determining respectively The pixel of pixel corresponding position in the second gray level image and third gray level image；Pixel is obtained in the first gray level image In the first gray value, pixel the second gray value of the pixel of corresponding position and pixel in the second gray level image exist The third gray value of the pixel of corresponding position in third gray level image；By the first gray value, the second sum of the grayscale values third gray scale It is worth three to be added, obtains gray scale and value；Gray value mapping is carried out to gray scale and value based on grey scale mapping relation table, obtains a vertical frame dimension The Continuous Tone Image of dynamic range；The color information of all pixels point in target normal exposure image is assigned to middle gray Each pixel of corresponding position in image generates target high dynamic range images.

Mobile terminal 700 can be realized each process that mobile terminal is realized in previous embodiment, to avoid repeating, here It repeats no more.

The mobile terminal of the embodiment of the present invention is obtained within the first time for exposure by processor 701 using dual camera Overexposure, the image for owing exposure and normal exposure, are obtained according to three images using high dynamic range images algorithm composograph information It obtains present frame and exports image, it is all the image for carrying out the synthesis of high dynamic range images algorithm that each frame output image, which may be implemented, The effect of each all included high dynamic range of frame output image, and make user during shooting, the height that preview is seen is dynamic State range image effect is exactly the effect finally shot, promotes the shooting experience of user.

Embodiment five

The embodiment of the present invention five provides a kind of mobile terminal.As shown in figure 8, mobile terminal 800 can be mobile phone, plate Computer, personal digital assistant (PersonalDigital Assistant, PDA) or vehicle-mounted computer etc..

Mobile terminal 800 in Fig. 8 includes radio frequency (RadioFrequency, RF) circuit 810, memory 820, input list First 830, display unit 840, component 850 of taking pictures, processor 860, voicefrequency circuit 870, WiFi (WirelessFidelity) mould Block 880 and power supply 890, component 850 of taking pictures include: the first camera 8501 and second camera 8502.

Wherein, input unit 830 can be used for receiving the number or character information of user's input, and generation and mobile terminal The related signal input of 800 user setting and function control.Specifically, in the embodiment of the present invention, which can To include touch panel 831.Touch panel 831, also referred to as touch screen collect the touch operation of user on it or nearby (for example user uses the operations of any suitable object or attachment on touch panel 831 such as finger, stylus), and according to preparatory The formula of setting drives corresponding attachment device.Optionally, touch panel 831 may include touch detecting apparatus and touch controller Two parts.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected, by signal Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, The processor 860 is given again, and can be received order that processor 860 is sent and be executed.Furthermore, it is possible to using resistance-type, The multiple types such as condenser type, infrared ray and surface acoustic wave realize touch panel 831.In addition to touch panel 831, input unit 830 can also include other input equipments 832, other input equipments 832 can include but is not limited to physical keyboard, function key One of (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. are a variety of.

Wherein, display unit 840 can be used for showing information input by user or be supplied to the information and movement of user The various menu interfaces of terminal 800.Display unit 840 may include display panel 841, optionally, can use LCD or organic hair The forms such as optical diode (OrganicLight-EmittingDiode, OLED) configure display panel 841.

It should be noted that touch panel 831 can cover display panel 841, touch display screen is formed, when the touch display screen is examined After measuring touch operation on it or nearby, processor 860 is sent to determine the type of touch event, is followed by subsequent processing device 860 provide corresponding visual output according to the type of touch event in touch display screen.

Touch display screen includes Application Program Interface viewing area and common control viewing area.The Application Program Interface viewing area And arrangement mode of the common control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with The interface elements such as the icon comprising at least one application program and/or widget desktop control.The Application Program Interface viewing area Or the empty interface not comprising any content.This commonly uses control viewing area for showing the higher control of utilization rate, for example, Application icons such as button, interface number, scroll bar, phone directory icon etc. are set.

Wherein processor 860 is the control centre of mobile terminal 800, utilizes various interfaces and connection whole mobile phone Various pieces, by running or executing the software program and/or module that are stored in first memory 821, and calling storage Data in second memory 822 execute the various functions and processing data of mobile terminal 800, thus to mobile terminal 800 Carry out integral monitoring.Optionally, processor 860 may include one or more processing units.

In embodiments of the present invention, by call store the first memory 821 in software program and/or module and/ Or the data in the second memory 822, processor 860 is for obtaining the first camera in the first time for exposure to reference object First image of acquisition, and obtain the second image that second camera successively acquires reference object within the first time for exposure and Third image；Image procossing is carried out to the first image, the second image and third image, generates target high dynamic range images；Its In, the first image, the second image and third image are respectively normal exposure image, overexposure image and owe to expose one of image.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First image is overexposure image, and the second image is normal exposure image, and third image is to owe to expose image.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First image is normal exposure image, and the second image is overexposure image, and third image is to owe to expose image.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, The sum of second time for exposure and the third time for exposure of third image of second image were equal to for the first time for exposure.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera is identical with the second aperture F value value of second camera, the first image first exposure when Between N times with the product of the second time for exposure and the second exposure gain that the product of the first exposure gain is the second image, third The third time for exposure of image and the product of third exposure gain are the second time for exposure and the second exposure gain of the second image 1/N times of product, wherein the value range of N is 2≤N≤4.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera is identical with the second aperture F value value of second camera, the second image second exposure when Between N times with the product of the first time for exposure and the first exposure gain that the product of the second exposure gain is the first image, third The third time for exposure of image and the product of third exposure gain are the first time for exposure and the first exposure gain of the first image 1/N times of product, wherein the value range of N is 2≤N≤4.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, First aperture F value of the first camera and the second aperture F value of second camera are unequal, and the first aperture of the first camera Light-inletting quantity is M times of the second aperture light-inletting quantity of second camera, the of the second time for exposure of the second image and third image The sum of three time for exposure were equal to for the first time for exposure, and the value range of M is 1 M≤4 <.

Optionally, the first figure that processor 860 acquires reference object in the first time for exposure in the first camera of acquisition Picture, and when obtaining the second image and third image that second camera successively acquires reference object within the first time for exposure, The first aperture light-inletting quantity, the first time for exposure and the product of the first exposure gain three of first image are the second of the second image Aperture light-inletting quantity, N times of product of the second time for exposure and the second exposure gain three, the second aperture entering light of third image When amount, third time for exposure and the product of third exposure gain three are the second aperture light-inletting quantity of the second image, the second exposure Between 1/N times with the product of the second exposure gain three, wherein the value range of N is 2≤N≤4.

Optionally, processor 860 is carrying out image procossing to the first image, the second image and third image, generates target When high dynamic range images, be also used to: based on the first image, the second image and third image, determine target normal exposure image, Target overexposure image and target owe to expose image；Target normal exposure image, target overexposure image and target is extracted respectively to owe to expose figure The grayscale information of picture, obtain the first gray level image of target normal exposure image, the second gray level image of target overexposure image and Target owes to expose the third gray level image of image；Using the first gray level image as benchmark, by the second gray level image and third grayscale image As correction to the image for the first gray level image being same visual field；To the first gray level image, the second gray level image and third gray scale Image carries out image synthesis processing, generates target high dynamic range images.

Optionally, processor 860 is carrying out image conjunction to the first gray level image, the second gray level image and third gray level image It is also used to when generating target high dynamic range images at processing: for each pixel in the first gray level image, determining respectively The pixel of pixel corresponding position in the second gray level image and third gray level image；Pixel is obtained in the first gray level image In the first gray value, pixel the second gray value of the pixel of corresponding position and pixel in the second gray level image exist The third gray value of the pixel of corresponding position in third gray level image；By the first gray value, the second sum of the grayscale values third gray scale It is worth three to be added, obtains gray scale and value；Gray value mapping is carried out to gray scale and value based on grey scale mapping relation table, obtains a vertical frame dimension The Continuous Tone Image of dynamic range；The color information of all pixels point in target normal exposure image is assigned to middle gray Each pixel of corresponding position in image generates target high dynamic range images.

The mobile terminal of the embodiment of the present invention is obtained within the first time for exposure by processor 860 using dual camera Overexposure, the image for owing exposure and normal exposure, are obtained according to three images using high dynamic range images algorithm composograph information It obtains present frame and exports image, it is all the image for carrying out the synthesis of high dynamic range images algorithm that each frame output image, which may be implemented, The effect of each all included high dynamic range of frame output image, and make user during shooting, the height that preview is seen is dynamic State range image effect is exactly the effect finally shot, promotes the shooting experience of user.

Those of ordinary skill in the art may be aware that the embodiment in conjunction with disclosed in the embodiment of the present invention describe it is each Exemplary unit and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered Think beyond the scope of this invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In embodiment provided herein, it should be understood that disclosed device and method can pass through others Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or unit It connects, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk 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 of the art is come It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist In protection scope of the present invention.

Claims

1. a kind of generation method of high dynamic range images, is applied to mobile terminal, the mobile terminal includes the first camera And second camera, which is characterized in that the described method includes:

The first image that first camera acquires reference object in the first time for exposure is obtained, and obtains described second and takes the photograph The second image and third image that the reference object is successively acquired within first time for exposure as head；

Image procossing is carried out to the first image, second image and the third image, generates target high dynamic range Image；

Wherein, the first image, second image and the third image be respectively normal exposure image, overexposure image and It owes to expose one of image；

It is described to the first image, second image and the third image carry out image procossing, generate target high dynamic The step of range image, comprising:

Based on the first image, second image and the third image, target normal exposure image, target overexposure are determined Image and target owe to expose image；

The target normal exposure image, the target overexposure image and the target is extracted respectively to owe to expose the gray scale letter of image Breath, obtains the first gray level image of the target normal exposure image, the second gray level image of the target overexposure image and institute Target is stated to owe to expose the third gray level image of image；

Using first gray level image as benchmark, by second gray level image and the third gray level image correct to institute State the image that the first gray level image is same visual field；

Image synthesis processing is carried out to first gray level image, second gray level image and the third gray level image, it is raw At the target high dynamic range images.

2. the method according to claim 1, wherein the first image is overexposure image, second image For normal exposure image, and the third image is to owe to expose image.

3. the method according to claim 1, wherein the first image be normal exposure image, described second Image is overexposure image, and the third image is to owe to expose image.

4. according to the method in claim 2 or 3, which is characterized in that the second time for exposure of second image with it is described The sum of third time for exposure of third image is equal to first time for exposure.

5. according to the method described in claim 2, it is characterized in that, the first aperture F value of first camera and described Second aperture F value value of two cameras is identical, the first time for exposure of the first image and the product of the first exposure gain It is N times of the product of the second time for exposure and the second exposure gain of second image, the third exposure of the third image The product of time and third exposure gain is the 1/N of the second time for exposure of second image and the product of the second exposure gain Times, wherein the value range of N is 2≤N≤4.

6. according to the method described in claim 3, it is characterized in that, the first aperture F value of first camera and described Second aperture F value value of two cameras is identical, the second time for exposure of second image and the product of the second exposure gain It is N times of the product of the first time for exposure and the first exposure gain of the first image, the third exposure of the third image The product of time and third exposure gain is the 1/N of the first time for exposure of the first image and the product of the first exposure gain Times, wherein the value range of N is 2≤N≤4.

7. according to the method described in claim 2, it is characterized in that, the first aperture F value of first camera and described Second aperture F value of two cameras is unequal, and the first aperture light-inletting quantity of first camera is the second camera M times of the second aperture light-inletting quantity, the third time for exposure of the second time for exposure of second image and the third image The sum of be equal to first time for exposure, the value range of M is 1 M≤4 <.

8. the method according to the description of claim 7 is characterized in that the first aperture light-inletting quantity of the first image, the first exposure It is the second aperture light-inletting quantity of second image, the second time for exposure and the with the product of the first exposure gain three between light time N times of the product of two exposure gain threes, the second aperture light-inletting quantity, third time for exposure and the third of the third image expose The product of gain three is the second aperture light-inletting quantity, the second time for exposure and the second exposure gain three of second image 1/N times of product, wherein the value range of N is 2≤N≤4.

9. the method according to claim 1, wherein described to first gray level image, second gray scale The step of image and the third gray level image carry out image synthesis processing, generate the target high dynamic range images, comprising:

For each pixel in first gray level image, determine the pixel in second gray level image and institute respectively State the pixel of corresponding position in third gray level image；

First gray value of the pixel in first gray level image, the pixel are obtained in second grayscale image The second gray value and the pixel corresponding position in the third gray level image of the pixel of corresponding position as in The third gray value of pixel；

Third gray value three described in first gray value, second sum of the grayscale values is added, gray scale and value are obtained；

Gray value mapping is carried out to the gray scale and value based on grey scale mapping relation table, obtains the intermediate ash of a vertical frame dimension dynamic range Spend image；

The color information of all pixels point in the target normal exposure image is assigned in the Continuous Tone Image corresponding Each pixel of position generates the target high dynamic range images.

10. a kind of mobile terminal, the mobile terminal includes the first camera and second camera, which is characterized in that the shifting Dynamic terminal further include:

Acquisition module, the first image that reference object is acquired in the first time for exposure for obtaining first camera, and Obtain the second image and third that the second camera successively acquires the reference object within first time for exposure Image；

Processing module, the first image, second image and the third image for being obtained to the acquisition module Image procossing is carried out, target high dynamic range images are generated；

The processing module includes:

It determines submodule, for being based on the first image, second image and the third image, determines that target normally exposes Light image, target overexposure image and target owe to expose image；

Extracting sub-module, for extracting the target normal exposure image, the target that the determining submodule determines respectively Overexposure image and the target owe to expose the grayscale information of image, obtain the target normal exposure image the first gray level image, Second gray level image of the target overexposure image and the target owe to expose the third gray level image of image；

Correction module, for using first gray level image that the extracting sub-module obtains as benchmark, by described second Gray level image and the third gray level image are corrected to the image for first gray level image being same visual field；

Handle submodule, first gray level image for obtaining to the extracting sub-module, through the correction module school Second gray level image and the third gray level image after just carry out image synthesis processing, generate the target high dynamic range Enclose image.

11. mobile terminal according to claim 10, which is characterized in that the first image for obtaining module and obtaining For overexposure image, second image is normal exposure image, and the third image is to owe to expose image.

12. mobile terminal according to claim 10, which is characterized in that the first image for obtaining module and obtaining For normal exposure image, second image is overexposure image, and the third image is to owe to expose image.

13. mobile terminal according to claim 11 or 12, which is characterized in that the second time for exposure of second image It is equal to first time for exposure with the sum of third time for exposure of the third image.

14. mobile terminal according to claim 11, which is characterized in that the first aperture F value of first camera and Second aperture F value value of the second camera is identical, the first time for exposure of the first image and the first exposure gain Product be second image the second time for exposure and N times of product of the second exposure gain, the of the third image The product of three time for exposure and third exposure gain is the second time for exposure of second image and multiplying for the second exposure gain Long-pending 1/N times, wherein the value range of N is 2≤N≤4.

15. mobile terminal according to claim 12, which is characterized in that the first aperture F value of first camera and Second aperture F value value of the second camera is identical, the second time for exposure of second image and the second exposure gain Product be the first image the first time for exposure and N times of product of the first exposure gain, the of the third image The product of three time for exposure and third exposure gain is the first time for exposure of the first image and multiplying for the first exposure gain Long-pending 1/N times, wherein the value range of N is 2≤N≤4.

16. mobile terminal according to claim 11, which is characterized in that the first aperture F value of first camera and Second aperture F value of the second camera is unequal, and the first aperture light-inletting quantity of first camera is described second The third of M times of second aperture light-inletting quantity of camera, the second time for exposure of second image and the third image exposes It is equal to first time for exposure the sum of between light time, the value range of M is 1 M≤4 <.

17. mobile terminal according to claim 16, which is characterized in that the first aperture light-inletting quantity of the first image, When the product of first time for exposure and the first exposure gain three are the second aperture light-inletting quantity of second image, the second exposure Between N times with the product of the second exposure gain three, the second aperture light-inletting quantity of the third image, third time for exposure and the The product of three exposure gain threes is the second aperture light-inletting quantity, the second time for exposure and the second exposure gain of second image 1/N times of the product of three, wherein the value range of N is 2≤N≤4.

18. mobile terminal according to claim 10, which is characterized in that the processing submodule includes:

Determination unit, for for each pixel in first gray level image, determining the pixel described the respectively The pixel of corresponding position in two gray level images and the third gray level image；

Acquiring unit exists for obtaining the first gray value, the pixel of the pixel in first gray level image The second gray value of the pixel of corresponding position and the pixel are in the third grayscale image in second gray level image The third gray value of the pixel of corresponding position as in；

Computing unit, third described in first gray value, second sum of the grayscale values for obtaining the acquiring unit Gray value three is added, and obtains gray scale and value；

Map unit, for carrying out gray value with value to the gray scale that the computing unit obtains based on grey scale mapping relation table Mapping, obtains the Continuous Tone Image of a vertical frame dimension dynamic range；

Processing unit, it is single for the color information of all pixels point in the target normal exposure image to be assigned to the mapping Each pixel of corresponding position in the Continuous Tone Image that member obtains, generates the target high dynamic range images.