WO2016123850A1

WO2016123850A1 - Photographing control method for terminal, and terminal

Info

Publication number: WO2016123850A1
Application number: PCT/CN2015/075549
Authority: WO
Inventors: 毛鹏; 刘振龙
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-02-02
Filing date: 2015-03-31
Publication date: 2016-08-11
Also published as: CN104601901A

Abstract

The present invention provides a photographing control method for a terminal, and the terminal. The method comprises: acquiring a current exposure coefficient and a maximum exposure coefficient of a terminal; taking multiple different exposure compensation coefficients between the current exposure coefficient and the maximum exposure coefficient; controlling the terminal to photograph a same scene by separately using the current exposure coefficient, the multiple different exposure compensation coefficients and the maximum exposure coefficient, so as to acquire multiple original pictures; and synthesizing the original pictures to generate a final picture. By means of embodiments of the present invention, multiple different exposure coefficients are taken between a current exposure coefficient and a maximum exposure coefficient, pictures are taken by using the exposure coefficients, the acquired pictures are synthesized and then output, and the problem in the prior art that the picture taking effect is not good in a dark scene is solved.

Description

Terminal photographing control method and terminal

The present application claims priority to Chinese Patent Application No. 201510053364.0, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present invention relates to the field of photographing applications, and in particular, to a terminal photographing control method and a terminal.

Background technique

With the enhancement of terminal functions, users are increasingly dependent on smart terminals. For example, users often use mobile phones to take photos without purchasing cameras separately, and devices such as mobile phones are not good in dark scenes. Affects the user experience.

Therefore, how to provide a photographing method capable of improving the photographing effect under dark light is a technical problem to be solved by those skilled in the art.

Summary of the invention

The invention provides a terminal photographing control method and a terminal, which solves the problem that the photographing effect of the dark light scene in the prior art is poor.

The present invention provides a terminal photographing control method. In one embodiment, the method includes: acquiring a current exposure coefficient and a maximum exposure coefficient of the terminal; and taking a plurality of different compensation exposure coefficients between the current exposure coefficient and the maximum exposure coefficient. The control terminal respectively captures the same scene with the current exposure coefficient, a plurality of different compensation exposure coefficients, and the maximum exposure coefficient, and acquires a plurality of original photos; synthesizes the plurality of original photos to generate a final photo.

Further, the manner of taking a plurality of different compensation exposure coefficients between the current exposure coefficient and the maximum exposure coefficient in the above embodiment includes: an equal value, and an equal value.

Further, the plurality of different compensated exposure coefficients in the above embodiments include: different compensated exposure coefficients greater than five.

Further, the step of synthesizing a plurality of original photos in the foregoing embodiment to generate a final photo includes: acquiring image contours of each of the plurality of original photos, and integrating the image contours of the respective photos The image outline in the final photo; the image color of each photo in the plurality of original photos is acquired, and the image color of the final photo is calculated according to the image color of each photo.

Further, after calculating the image color of the final photo, the foregoing embodiment further includes: acquiring a maximum brightness value of the original photo taken by using the current exposure coefficient, using the maximum brightness value as the maximum brightness of the final photo, and linearly adjusting the image brightness in the final photo. .

The present invention provides a terminal. In an embodiment, the device includes: an obtaining module, configured to acquire a current exposure coefficient and a maximum exposure coefficient of the terminal; and a value module, configured between the current exposure coefficient and the maximum exposure coefficient Taking a plurality of different compensation exposure coefficients; the control module is configured to control the terminal to capture the same scene with the current exposure coefficient, a plurality of different compensation exposure coefficients and a maximum exposure coefficient, and obtain the original photo; the synthesis module is used for multiple The original photos are combined to produce the final photo.

Further, the value-receiving module in the above embodiment is specifically configured to take a plurality of different compensated exposure coefficients between the current exposure coefficient and the maximum exposure coefficient by using an equal value or an equal value.

Further, the value module in the above embodiment is specifically configured to take more than 5 different compensation exposure coefficients.

Further, the synthesizing module in the above embodiment is specifically configured to acquire an image contour of each photo in the plurality of original photos, fuse the image contour of each photo to generate an image contour in the final photo, and acquire an image of each photo in the plurality of original photos. Color, which calculates the image color of the final photo based on the image color of each photo.

Further, the synthesizing module in the above embodiment is further configured to acquire a maximum brightness value of the original photo taken by using the current exposure coefficient, and use the maximum brightness value as the maximum brightness of the final photo to linearly adjust the brightness of the image in the final photo.

The beneficial effects of the invention:

The method provided by the present invention takes a photo under these exposure coefficients by taking a plurality of different exposure coefficients between the current exposure coefficient and the maximum exposure coefficient, and then synthesizes the obtained photos and outputs them because of the exposure degree of the photos. Differently, the outlines of the images in different photos can be complemented to obtain a relatively clear and complete image outline, and the color of the image is also the same. Then, the image outlines of the photos obtained by these photos are clearer than the single photograph, and the colors are bright, and the solution is solved. The problem of poor photographing in the existing dark scenes.

DRAWINGS

FIG. 1 is a flowchart of a terminal photographing control method according to a first embodiment of the present invention;

2 is a schematic structural diagram of a terminal according to a second embodiment of the present invention;

FIG. 3 is a flowchart of a terminal photographing control method according to a third embodiment of the present invention.

detailed description

The invention will now be further illustrated by way of specific embodiments in conjunction with the accompanying drawings.

First embodiment:

FIG. 1 is a flowchart of a terminal photographing control method according to a first embodiment of the present invention; as shown in FIG. 1 , in the embodiment, the terminal photographing control method provided by the present invention includes the following steps:

S101: Acquire a current exposure coefficient and a maximum exposure coefficient of the terminal;

The exposure coefficient refers to the Exposure Value when the terminal is photographed. The EV value is a value indicating the light passing amount of the photographing lens by the combination of the shutter speed value and the aperture value. The exposure time and the aperture size are determined, and the existing mobile phone generally does not support the aperture adjustment. Then the exposure coefficient is determined by the exposure time; the current exposure coefficient refers to the default exposure coefficient of the terminal when the user presses the camera button, and the maximum exposure coefficient is determined by the performance of the terminal device;

S102: taking a plurality of different compensation exposure coefficients between the current exposure coefficient and the maximum exposure coefficient;

In practical applications, the terminal often adopts the current exposure coefficient and cannot take a perfect photo. When the maximum exposure coefficient is used, there will be too much exposure in the brighter part of the scene. The current exposure coefficient and maximum in this step are A plurality of different exposure coefficients are taken between the exposure coefficients, and the compensation exposure coefficient is recorded. When the terminal takes photos with these compensated exposure coefficients, the photographing effect is between the current exposure coefficient and the maximum exposure coefficient, and the contour and the same image can be used for the same image. Complementary color distortion;

S103: The control terminal respectively captures the same scene by using a current exposure coefficient, a plurality of different compensation exposure coefficients, and a maximum exposure coefficient, to obtain an original photo;

This step refers to taking multiple photos with different exposure factors when the terminal takes a picture of an image. For a terminal such as a mobile phone, it is to store photos at different exposure time points;

S104: Synthesize a plurality of original photos to generate a final photo.

In some embodiments, the manner of taking a plurality of different compensated exposure coefficients between the current exposure coefficient and the maximum exposure coefficient in the embodiment shown in FIG. 1 includes: an equal value, an equal value. In practical application In the case, although the compensation exposure coefficient is only required between the current exposure coefficient and the maximum exposure coefficient, if the compensation exposure coefficient is infinitely close to the current exposure coefficient and/or the maximum exposure coefficient, or the compensation exposure coefficients are substantially the same, the collected original photos In some photos, the outlines and colors of the images are very close. Even if these photos are combined, the obtained photos are not very good compared with the photos taken with the current exposure coefficient. Therefore, this implementation is not very good. The specific value method is provided, and the value is determined by the method of equal difference/equal ratio series, which can make the variation gradient between the compensation exposure coefficients more reasonable, and the difference between the photos taken by the terminal using these compensation exposure coefficients is obvious, and the synthesis is obvious. When you have a better reference value, the resulting photos will work better.

In some embodiments, the plurality of different compensated exposure coefficients in the embodiment of FIG. 1 include: greater than five different compensated exposure coefficients. In practical applications, the more original photos that participate in the synthesis, the more the photos can be referenced to each other. Therefore, the more compensation the number of different exposure factors, the better, generally at least greater than 5, while participating The more photos are synthesized, the slower the processing speed. Therefore, there is an upper limit value for the number of different compensation exposure factors. Preferably, the upper limit is generally less than 15.

In some embodiments, step S104 in the embodiment shown in FIG. 1 includes: acquiring image contours of each of the plurality of original photos, fusing image contours of the respective photos to generate an image contour in the final photo; acquiring a plurality of original photos The image color of each photo in the photo, and the image color of the final photo is calculated according to the image color of each photo. The photo scene includes image outlines and image colors, wherein the image outlines (when the layers of the same subject are different, the present application also considers them to be different image outlines), therefore, when synthesizing photos, both of them need to be considered simultaneously. In one aspect, the embodiment further provides a method for generating an image contour, and adopts a plurality of image contours in a photograph taken in the same scene to be merged, which can make up for the lack of an arc and determine an optimal image contour, and the effect is better. The same is true for image color, which uses multiple photos to complement each other to make up for the lack of exposure of some photos.

In some embodiments, after calculating the image color of the final photo, the foregoing embodiment further includes: acquiring a maximum brightness value of the original photo taken by using the current exposure coefficient, and using the maximum brightness value as the maximum brightness of the final photo, linearly adjusting the final photo. Image brightness. In practical applications, the brightness of an image in a photo synthesized by multiple pictures tends to be greater than the brightness of the same image in the photo that participates in the synthesis, in order to further provide the user experience, such as adapting the photo to the dark scene, In this embodiment, the maximum brightness value of the photo taken by the current exposure coefficient is taken as the maximum brightness of the composite photo, linear Adjustment (including comparison of straight line and other characteristics, better adjustment method such as characteristic curve) The brightness of each image in the final photo, so that the final photo synthesized has the same maximum brightness value as the photo taken with the current exposure coefficient, while other parts The linearity is reduced, and the exposure compensation for the dark part of the photo taken with the current exposure factor is also achieved, and the brightness between the different images in the photo is excessively perfect. The overall effect is better.

Second embodiment:

2 is a schematic structural diagram of a terminal according to a second embodiment of the present invention; as shown in FIG. 2, in the embodiment, the terminal 2 provided by the present invention includes: an obtaining module 21, a value obtaining module 22, a control module 23, and a synthesizing module. 24, of which

The obtaining module 21 is configured to acquire the current exposure coefficient and the maximum exposure coefficient of the terminal, and transmit the result to the value module 22;

The value module 22 is configured to take a plurality of different compensation exposure coefficients between the current exposure coefficient and the maximum exposure coefficient, and then transmit the compensation exposure coefficient, the current exposure coefficient and the maximum exposure coefficient to the control module 23;

The control module 23 is configured to control the terminal to capture the same scene with the current exposure coefficient, the plurality of different compensation exposure factors and the maximum exposure coefficient, respectively, to obtain the original photos, and then send the original photos to the synthesis module 24;

The synthesizing module 24 is configured to synthesize a plurality of original photos, generate a final photo, and output a final photo, such as displaying to a user through a display screen.

In some embodiments, the value module 22 in the embodiment shown in FIG. 2 is specifically configured to take a plurality of different compensation exposures between the current exposure coefficient and the maximum exposure coefficient by using an equal value or an equal value. coefficient.

In some embodiments, the value module 22 in the embodiment shown in FIG. 2 is specifically configured to take more than five different compensated exposure coefficients.

In some embodiments, the synthesizing module 24 in the embodiment shown in FIG. 2 is specifically configured to acquire image contours of each photo in the plurality of original photos, and fuse the image contours of the respective photos to generate an image contour in the final photo; The image color of each photo in the original photo, and the image color of the final photo is calculated according to the image color of each photo.

In some embodiments, the synthesis module 24 in the embodiment shown in FIG. 2 is also used to acquire the current The maximum brightness value of the original photo taken with the exposure factor, the maximum brightness value is taken as the maximum brightness of the final photo, and the brightness of the image in the final photo is linearly adjusted.

In some embodiments, the present invention relates to a terminal, such as a mobile phone, a tablet, or the like.

The present invention will be further explained in conjunction with specific application examples.

Third embodiment:

FIG. 3 is a flowchart of a terminal photographing control method according to a third embodiment of the present invention. As shown in FIG. 3, in the embodiment, the terminal photographing control method provided by the present invention includes the following steps:

S301: the mobile phone enters a shooting mode to determine a current exposure coefficient and a maximum exposure coefficient;

In practical applications, the exposure factor used by the mobile phone is generally 0.01 seconds, and the maximum exposure coefficient supported is generally 0.1 second. For this case, the exposure coefficient involved in the present application is measured in time units, which is determined in this step. The current exposure coefficient is 0.01 seconds, and the maximum exposure coefficient is 0.1 second;

S302: The mobile phone determines the number of compensation exposure factors and the selection manner according to the user selection/default setting;

For example, the user selects the selection method as the difference selection, and the number is 9.

S303: the mobile phone determines the compensation exposure coefficient according to the number of compensation exposure factors and the selection manner;

Taking the above steps, the compensation exposure coefficients are 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08 and 0.09 seconds, respectively;

S304: After the user presses the photo button, the mobile phone collects the original photo;

After the user determines the subject, press the capture button, the terminal normally takes a picture, and the backlight time lasts 0.1 second, and collects at 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, and 0.1 seconds, respectively. Original photo;

S305: The mobile phone determines the outline and color of each image in the final photo according to the original photo;

The original photos are collected from the same thing. Each of these photos has one or more identical images. Just because the exposure time is different, the outline/color of the same image will be different in different photos, such as unclear outline and color distortion. Etc., the outline of each image in the final photo can be complementarily fused according to the contour of the same image in all the original photos, and the color can also be determined by using an existing algorithm;

S306: The mobile phone determines the maximum brightness of the final photo according to the maximum brightness in the original photo collected by the current exposure coefficient;

The calculation of the maximum brightness is simple, and will not be described in detail in this application;

S307: The mobile phone linearly adjusts the brightness of other images in the final photo under the condition that the maximum brightness of the final photo is ensured;

For example, there are 2 images in the final photo, the brightness of image 1 is 200, the brightness of image 2 is 100, and the maximum of the image (usually image 1) in the original photo captured by the terminal at 0.01 seconds is 150. In the adjusted final photo, the brightness of image 1 is 150, and the brightness of image 2 is 75;

S308: The mobile phone generates a final photo and presents it to the user through the display.

In summary, through the implementation of the present invention, at least the following beneficial effects exist:

By taking a plurality of different exposure coefficients between the current exposure coefficient and the maximum exposure coefficient, the photos are taken under these exposure coefficients, and the resulting photos are combined and output, because the exposure degrees of the photos are different, and the images within the different photos are different. The contours of the images can be complemented to obtain a relatively complete image outline. The color of the image is also the same. Then, the images in the photos obtained by these photos are clearer than the single photo, and the colors are bright, which solves the existing dark scene. The problem of poor photo taking is not good.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program instructing related hardware. The program can be stored in a computer readable storage medium, such as a ROM/ RAM, disk, CD, etc.

The above is only a specific embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, equivalent change, combination or modification of the above embodiments in accordance with the technical spirit of the present invention is still in the present invention. The scope of protection of the technical solution of the invention.

Claims

A terminal photographing control method, comprising:

Obtaining a current exposure coefficient and a maximum exposure coefficient of the terminal;

Taking a plurality of different compensated exposure coefficients between the current exposure coefficient and the maximum exposure coefficient;

The control terminal respectively captures the same scene by using the current exposure coefficient, the plurality of different compensation exposure coefficients, and the maximum exposure coefficient, and acquires a plurality of original photos;

The plurality of original photos are synthesized to generate a final photo.
The terminal photographing control method according to claim 1, wherein the manner of taking a plurality of different compensated exposure coefficients between the current exposure coefficient and the maximum exposure coefficient comprises: an equal value, an equal value.
The terminal photographing control method according to claim 1, wherein the plurality of different compensated exposure coefficients comprise: more than 5 different compensated exposure coefficients.
The terminal photographing control method according to any one of claims 1 to 3, wherein the step of synthesizing the plurality of original photographs to generate a final photograph comprises: acquiring an image of each of the plurality of original photographs a contour, the image contours of the respective photos are merged to generate an image outline in the final photo; an image color of each of the plurality of original photos is acquired, and an image of the final photo is calculated according to image colors of the respective photos color.
The terminal photographing control method according to claim 4, further comprising: calculating a maximum brightness value of the original photo taken by the current exposure coefficient after calculating the image color of the final photo, the maximum brightness The value is used as the maximum brightness of the final photo to linearly adjust the brightness of the image in the final photo.
A terminal, comprising:

Obtaining a module, configured to acquire a current exposure coefficient and a maximum exposure coefficient of the terminal;

And a value module, configured to take a plurality of different compensation exposure coefficients between the current exposure coefficient and the maximum exposure coefficient;

a control module, configured to control the terminal to capture the same scene by using the current exposure coefficient, the plurality of different compensation exposure factors, and the maximum exposure coefficient, to obtain a plurality of original photos;

a synthesis module for synthesizing the plurality of original photos to generate a final photo.
The terminal according to claim 6, wherein the value determining module is specifically configured to take multiple values between the current exposure coefficient and the maximum exposure coefficient by using an equal value or an equal value. Different compensation exposure factors.
The terminal according to claim 6, wherein the value determining module is specifically configured to take more than five different compensated exposure coefficients.
The terminal according to any one of claims 6 to 8, wherein the synthesizing module is configured to acquire an image contour of each of the plurality of original photos, and merge the image contours of the photos An image outline in the final photo; an image color of each of the plurality of original photos is acquired, and an image color of the final photo is calculated according to image colors of the respective photos.
The terminal according to claim 9, wherein the synthesizing module is further configured to acquire a maximum brightness value of an original photo taken by using the current exposure coefficient, and use the maximum brightness value as a maximum brightness of the final photo. , linearly adjusting the brightness of the image in the final photo.