WO2017004886A1

WO2017004886A1 - Image capturing method and terminal

Info

Publication number: WO2017004886A1
Application number: PCT/CN2015/089185
Authority: WO
Inventors: 马彦青; 曲廷
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-08
Filing date: 2015-09-08
Publication date: 2017-01-12
Also published as: CN106331512A

Abstract

An embodiment of the present invention discloses an image capturing method. The method comprises: acquiring, by a terminal, a current illuminance value of the environment where the terminal is located when a flash performs a pre-flash; determining, by the terminal and according to the current illuminance value, a value of an actual drive current of the flash; and driving, by the terminal, the flash with the value of the actual drive current. An embodiment of the present invention further discloses a terminal.

Description

Photographing method and terminal

Technical field

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

Background technique

At present, most smart terminals are equipped with a camera and a flash for the user to take pictures in a poor light environment. Usually, the flash is officially flashed after the pre-flash with the software preset drive current. Generally, the default flash current of the software is fixed, and the maximum can be close to 1A. In order to provide a good user experience and better adapt to different shooting environments, for a different illumination environment, a fixed flash drive current value is required, so that the user selects different scene modes during the process of using the terminal. To adjust the drive current of the flash. However, this also exists in different illumination environments, all of which drive the flash with the same driving current value, so that the terminal consumes a large amount of power when taking pictures, which affects battery life.

Summary of the invention

In view of this, in order to solve the technical problem existing in the prior art, the embodiment of the present invention provides a photographing method and a terminal.

In a first aspect, the embodiment of the present invention provides a photographing method, including: when a flash pre-flashes, the terminal collects a current illuminance value of an environment in which the flash is located; and the terminal determines an actual photo of the flash according to the current illuminance value. Driving a current value; the terminal drives the flash with the actual driving current value and takes a picture.

In the above solution, the terminal determines the actual driving current value of the flash according to the current illuminance value, including: the terminal gradually adjusting the driving current value of the flash until the adjusted driving current value is The current illuminance value matches; the terminal will adjust the The drive current value is determined as the actual drive current value.

In the above solution, the terminal determines the actual driving current value of the flash according to the current illuminance value, including: the terminal determines a preset image brightness value according to the current illuminance value; and the terminal gradually adjusts a driving current value of the flash lamp, and after each adjusting the driving current value, driving the flash and taking a picture with the adjusted driving current value; the terminal analyzing the obtained image to determine the brightness of the image a value; the terminal determines the adjusted driving current value as the actual driving current value when the brightness value of the image is consistent with the preset image brightness value.

In the above solution, the terminal gradually adjusts the driving current value of the flash, including: the terminal gradually adjusting the driving current value of the flash in a manner of sequentially increasing a fixed value.

In the above solution, the determining, by the terminal, the actual driving current value of the flash according to the current illuminance value, comprising: determining, by the terminal, the current illuminance value according to a correspondence between a preset illuminance value and a driving current. a drive current value; the terminal determines the corresponding drive current value as the actual drive current value.

In a second aspect, an embodiment of the present invention provides a terminal, including: a light sensor, a controller, a flash, a driving circuit, and a camera; wherein the flash is configured to fill light when the camera is photographed; the driving circuit The light sensor is configured to collect a current illuminance value of an environment in which the terminal to which the terminal belongs when the flash is pre-flashed; the controller is configured to be configured according to the current a illuminance value, determining an actual driving current value of the flash; controlling the driving circuit to drive the flash with the actual driving current value, and controlling the camera to take a picture.

In the above solution, the controller is specifically configured to gradually adjust the driving current value of the flash until the adjusted driving current value matches the current illuminance value; determining the adjusted driving current value as the The actual drive current value is described.

In the above solution, the controller is specifically configured to be determined according to the current illuminance value. Determining a preset image brightness value; gradually adjusting a driving current value of the flash lamp, and after each adjusting the driving current value, controlling the driving circuit to drive the flash lamp with an adjusted driving current value and controlling the Taking a picture of the camera; analyzing the obtained image to determine a brightness value of the image; and determining, when the brightness value of the image is consistent with the brightness value of the preset image, determining the adjusted driving current value as the actual Drive current value.

In the above solution, the controller is specifically configured to gradually adjust the driving current value of the flash in a manner of sequentially incrementing a fixed value.

In the above solution, the controller is configured to determine a driving current value corresponding to the current illuminance value according to a preset relationship between the illuminance value and the driving current; and determine the corresponding driving current value as the Actual drive current value.

The embodiment of the invention provides a photographing method and a terminal. When the flash pre-flashes, the terminal collects the illuminance value of the current environment in real time, and then determines the actual driving current of the flash according to the illuminance value, and then The actual drive current drives the flash to fill the light. That is to say, the actual driving current of the flash is adapted to the illumination of the environment in which the terminal is currently located, and it is not necessary to always drive the flash with a large current value. Thus, when the terminal performs photographing, power consumption can be reduced, and the battery can be improved. The endurance capability; further, since the actual driving current of the flash is adapted to the illumination of the environment in which the terminal is currently located, the photograph taken can avoid overexposure or underexposure, adapt to more shooting scenes, and provide Good user experience.

DRAWINGS

FIG. 1 is a schematic flowchart diagram of a photographing method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

detailed description

The technical solution in the embodiment of the present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention. Clearly and completely described.

The embodiment of the invention provides a photographing method, which can be applied to terminals such as smart phones, tablet computers, portable digital cameras, and SLR cameras. At least one camera is disposed on the terminals, and a flash or flash array is disposed at a position beside the camera, and a driving circuit for driving the flash or the flash array and a light sensor are further disposed on the terminal.

In practical applications, when the terminal has front and rear cameras, the light sensor can be set in the vicinity of the front camera and the rear camera, so that the illuminance value of the environment in which the terminal is located can be more accurately collected.

Referring to FIG. 1, the above photographing method includes:

S101: the terminal collects a current illuminance value of an environment in which the flash is located when the flash performs pre-flashing;

Specifically, when the user turns on the flash switch and presses the shutter button, first, the flash performs pre-flashing to reduce the red eye of the photo. At this time, the terminal collects the illuminance value of the environment in which the environment is located by using the light sensor.

S102: The terminal determines an actual driving current value of the flash according to the current illuminance value;

In a specific implementation process, S102 may be, without being limited to, the following three cases.

In the first case, the terminal determines the actual driving current value corresponding to the current illuminance value according to the correspondence between the preset illuminance value and the driving current.

Specifically, before the terminal leaves the factory, the manufacturer or the software developer obtains the correspondence between the illuminance value and the driving current through multiple experiments, and presets it in the terminal. Then, when the user uses the terminal to take a photo, Through the preset correspondence, the actual driving current of the flash corresponding to the current illuminance is determined.

In the second case, the terminal gradually adjusts the driving current value of the flash until the adjusted driving current value matches the current illuminance value; and determines the adjusted driving current value as the actual driving current value.

Specifically, after the S101 collects the current illuminance value, the terminal can gradually adjust the flash. The driving current, for example, the driving current starts from the initial value, and gradually adjusts the driving current value of the flash until the current illuminance value is matched, which may be when the flash is driven by the currently adjusted driving current value. The flash fills the environment to achieve the best fill light effect, then the adjusted drive current value at this time is determined as the actual drive current value.

In the third case, the terminal determines a preset image brightness value according to the current illuminance value; gradually adjusts the driving current value of the flash, and after each adjustment of the driving current value, drives the flash and takes a picture with the adjusted driving current value; The obtained image is analyzed to determine the brightness value of the image; when the brightness value of the image is consistent with the brightness value of the preset image, the adjusted driving current value is determined as the actual driving current value.

Specifically, before the terminal leaves the factory, the manufacturer or software developer presets the correspondence between the illuminance value and the image brightness value in the terminal. The image brightness value here refers to the best exposure effect under different illuminance values. The brightness value of the image. Then, after obtaining the current illumination value in S101, the terminal determines the corresponding preset image brightness value according to the corresponding relationship between the preset illumination value and the image brightness value, and then gradually adjusts the flash drive current value, which may be sequentially incremented. The fixed value method gradually adjusts the driving current value of the flash, and after each adjustment of the driving current value, the flash is driven and photographed with the adjusted driving current value. At this time, the terminal obtains an image, and then, the terminal Detecting a brightness value of the image, if the brightness value is consistent with the preset image brightness value, confirming the adjusted driving current value at this time as an actual driving current value of the flash, if the brightness value and the preset image brightness If the values do not match, continue to increase the drive current value and take a picture until the brightness value of the image obtained by the photograph is consistent with the preset image brightness value.

Of course, in the actual application, the terminal may also adopt other methods to obtain the actual driving current of the flash according to the current illuminance, which is not specifically limited in the present invention.

S103: The terminal drives the flash with the actual driving current value and takes a picture.

That is, the terminal determines the actual power of the flash corresponding to the current illumination value through S102. After the stream drive value, the flash is officially driven with the actual current drive value, the flash is lit, the shot area is filled, and the photograph is taken.

At this point, the process of adjusting the light and adjusting the photo by the terminal according to the current illuminance value of the environment is completed.

It can be seen from the above that when the flash pre-flashes, the terminal collects the illuminance value of the current environment in real time, and then determines the actual driving current of the flash according to the illuminance value, and then drives the flash to fill the light with the actual driving current. . That is to say, the actual driving current of the flash is adapted to the illumination of the environment in which the terminal is currently located, and it is not necessary to always drive the flash with a large current value. Thus, when the terminal performs photographing, power consumption can be reduced, and the battery can be improved. The endurance capability; further, since the actual driving current of the flash is adapted to the illumination of the environment in which the terminal is currently located, the photograph taken can avoid overexposure or underexposure, adapt to more shooting scenes, and provide Good user experience.

The embodiment of the invention provides a terminal, which is consistent with the terminal described in one or more embodiments.

Referring to FIG. 2, the terminal includes: a light sensor 21, a controller 22, a flash 23, a driving circuit 24, and a camera 25; wherein the flash 23 is configured to fill light when the camera 25 takes a picture; the driving circuit 24 is configured In order to drive the flash 23, the light sensor 21 is configured to collect the current illuminance value of the environment in which the terminal to which the terminal belongs when the flash 23 is pre-flashed; the controller 22 is configured to determine the actual driving current of the flash 23 according to the current illuminance value. The control drive circuit 24 drives the flash 23 with the actual drive current value and controls the camera 25 to take a picture.

In the above solution, the controller 22 is specifically configured to gradually adjust the driving current value of the flash 23 until the adjusted driving current value matches the current illuminance value; and determine the adjusted driving current value as the actual driving current value.

In the above solution, the controller 22 is specifically configured to determine a preset image brightness value according to the current illuminance value; gradually adjust the driving current value of the flash 23, and adjust the driving current every time. After the stream value, the control driving circuit 24 drives the flash 23 with the adjusted driving current value and controls the camera 25 to take a picture; analyzes the obtained image to determine the brightness value of the image; when the brightness value of the image matches the preset image brightness value The adjusted drive current value is determined as the actual drive current value.

In the above solution, the controller 22 is specifically configured to gradually adjust the driving current value of the flash 23 in a manner of sequentially incrementing the fixed value.

In the above solution, the controller 22 is specifically configured to determine a driving current value corresponding to the current illuminance value according to a preset relationship between the illuminance value and the driving current; and determine a corresponding driving current value as the actual driving current value.

In an actual application, the controller 22 may be a CPU, an ARM, or a DSP of the terminal, and the present invention is not specifically limited.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

These computer program instructions can also be stored in a bootable computer or other programmable data processing The apparatus is readable in a computer readable memory in a particular manner such that instructions stored in the computer readable memory produce an article of manufacture comprising instruction means implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

A method of photographing, including:

When the flash pre-flashes, the terminal collects the current illuminance value of the environment in which it is located;

The terminal determines an actual driving current value of the flash according to the current illuminance value;

The terminal drives the flash to operate with the actual drive current value.
The method according to claim 1, wherein the terminal determines an actual driving current value of the flash according to the current illuminance value, including:

The terminal gradually adjusts a driving current value of the flash lamp until the adjusted driving current value matches the current illuminance value;

The terminal determines the adjusted driving current value as the actual driving current value.
The method according to claim 1, wherein the terminal determines an actual driving current value of the flash according to the current illuminance value, including:

The terminal determines a preset image brightness value according to the current illuminance value;

The terminal gradually adjusts the driving current value of the flash, and after each adjustment of the driving current value, drives the flash and takes a picture with the adjusted driving current value;

The terminal analyzes the obtained image to determine a brightness value of the image;

The terminal determines the adjusted driving current value as the actual driving current value when the brightness value of the image is consistent with the preset image brightness value.
The method according to claim 2 or 3, wherein the terminal gradually adjusts the driving current value of the flash lamp, including:

The terminal gradually adjusts the driving current value of the flash in a manner of sequentially incrementing a fixed value.
The method according to claim 1, wherein the terminal determines an actual driving current value of the flash according to the current illuminance value, including:

Determining, by the terminal, a driving current value corresponding to the current illuminance value according to a correspondence between a preset illuminance value and a driving current;

The terminal determines the corresponding driving current value as the actual driving current value.
A terminal includes: a light sensor, a controller, a flash, a driving circuit, and a camera; wherein

The flash is configured to fill light when the camera is photographed;

The driving circuit is configured to drive the flash lamp;

The light sensor is configured to collect a current illuminance value of an environment in which the terminal to which the terminal belongs when the flash is pre-flashed;

The controller is configured to determine an actual driving current value of the flash according to the current illuminance value; and control the driving circuit to drive the flash to operate at the actual driving current value.
The terminal according to claim 6, wherein the controller is configured to gradually adjust a driving current value of the flash until the adjusted driving current value matches the current illuminance value; and the adjusted driving The current value is determined as the actual drive current value.
The terminal according to claim 6, wherein the controller is configured to determine a preset image brightness value according to the current illuminance value; gradually adjust a driving current value of the flash, and adjust the After driving the current value, controlling the driving circuit to drive the flash with the adjusted driving current value and controlling the camera to take a picture; analyzing the obtained image to determine a brightness value of the image; and brightness value of the image When the preset image brightness value is consistent, the adjusted driving current value is determined as the actual driving current value.
The terminal according to claim 7 or 8, wherein the controller is configured to gradually adjust a driving current value of the flash in a manner of sequentially incrementing a fixed value.
The terminal according to claim 6, wherein the controller is configured to determine a driving corresponding to the current illuminance value according to a correspondence between a preset illuminance value and a driving current. a current value; determining the corresponding drive current value as the actual drive current value.
A computer storage medium storing computer executable instructions for performing the method of any one of claims 1 to 5.