CN110855900A

CN110855900A - Photographing control method and system based on external flash light source and storage medium

Info

Publication number: CN110855900A
Application number: CN201911138601.8A
Authority: CN
Inventors: 何建军; 傅懿; 张勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-02-28
Anticipated expiration: 2039-11-20
Also published as: WO2021098865A1; CN110855900B

Abstract

The invention provides a photographing control method, a photographing control system and a storage medium based on an external flash light source, wherein the method comprises the following steps: the first processing assembly controls working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters, acquires light state information of the built-in flash light source and shooting state information of the image acquisition assembly in the corresponding working states, and generates an external light supplement starting trigger signal according to the light state information and the shooting state information; the external light supplement starting trigger signal comprises starting light supplement time; the signal sending assembly sends an external light supplementing starting trigger signal to the external flash light source, so that the external flash light source starts lighting and light supplementing work in light supplementing starting time according to the external light supplementing starting trigger signal; the image acquisition assembly starts shooting work after the flash lighting assembly starts lighting and supplementary lighting. The invention realizes synchronous control of the external flash light source for lighting and light supplementing during exposure without changing software and hardware of the equipment, and improves the photographing quality.

Description

Photographing control method and system based on external flash light source and storage medium

Technical Field

The present invention relates to the field of portable electronic devices, and in particular, to a method and system for controlling photographing based on an external flash light source, and a storage medium.

Background

The flash light source for photography is an important lighting device in the field of picture photography, and the flash light source outputs light rays with higher luminous flux in a short time so as to meet the requirement of light distribution in the photography process. Flash light sources require an external trigger signal to control the light output for short periods of time. The flash light source for photography appearing in the current market mainly adopts an external electric signal to trigger and control light output, and a photoelectric sensor is also used for starting and controlling the light output by detecting the light intensity change of an auxiliary light-guiding flash light source.

At present, more and more users begin to use intelligent electronic devices (such as smart phones) with shooting functions to shoot, and with the shooting mode going deep into professional fields, demands for driving external flash light sources by using the intelligent electronic devices are raised. The intelligent electronic equipment is internally provided with a low-power flash light source, but the output power of the built-in flash light source is low, and the position is fixed, so that the requirement of professional photography on an environmental light source cannot be met. In addition, most of the existing intelligent electronic devices are not specially designed for using scenes using external flash light sources, so that the electronic devices do not have special trigger signal output and cannot directly control the flash light sources to work.

In the prior art, short-distance radio communication methods such as Bluetooth and Wi-Fi are used for triggering an external flash light source, but due to the limitation of an internal operating system and software of the intelligent electronic equipment, the real-time performance is difficult to meet the requirement; in the communication method, special shooting software needs to be developed, and under the condition that the support of manufacturers is not obtained, the camera function and the shooting performance of the intelligent electronic equipment cannot be fully utilized, and high-quality pictures with high definition cannot be obtained.

Disclosure of Invention

The invention aims to provide a photographing control method, a photographing control system and a storage medium based on an external flash light source, which can realize synchronous control of the external flash light source during exposure of an image acquisition assembly and provide additional illumination without changing software and hardware of intelligent electronic equipment. .

The technical scheme provided by the invention is as follows:

the invention provides a photographing control system based on an external flash light source, which comprises:

the external flash light source and the intelligent electronic equipment are arranged;

the intelligent electronic equipment comprises a first processing assembly, an image acquisition assembly, a flash light source sensor, a built-in flash light source and a signal sending assembly; the flash light source sensor is arranged on one side of the built-in flash light source;

the external flash light source comprises a second processing assembly, a signal receiving assembly and a flash lighting assembly;

the flash light source sensor is used for acquiring the light state information of the built-in flash light source;

the first processing assembly is used for controlling the working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters, acquiring light state information of the built-in flash light source and shooting state information of the image acquisition assembly in the corresponding working states, and generating an external light supplement starting trigger signal according to the light state information and the shooting state information; the external light supplement starting trigger signal comprises starting light supplement time;

the signal sending component is used for sending the external supplementary lighting starting trigger signal when the signal sending time is up;

the signal receiving component is used for receiving the external supplementary lighting starting trigger signal;

the second processing assembly is used for controlling the flash lighting assembly to start lighting supplementary lighting operation at the lighting supplementary lighting starting time according to the external supplementary lighting starting trigger signal;

the image acquisition assembly is used for starting shooting work after the flash illumination assembly starts illumination and supplementary lighting work.

Further, the first judging module is used for judging whether light supplement of an external flash light source is needed;

the first processing module is used for generating a photographing trigger signal when the external flash light source is not needed for light supplement;

the first processing module is further configured to control working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters when external flash light source light supplement is needed, acquire and record the light state information and the shooting state information, so as to obtain start light supplement time according to the light state information and the shooting state information, and generate the flash start-stop control instruction according to the start light supplement time;

and the first data conversion module is used for converting the flash start-stop instruction into an external light supplement start trigger signal according to a preset signal conversion mode.

Further, the signal transmission assembly includes:

the wireless data transmission module is used for sending the photographing trigger signal to the image acquisition assembly and controlling the image acquisition assembly to start photographing work when receiving the photographing trigger signal;

the external light supplement starting triggering signal sending module is used for sending the external light supplement starting triggering signal to the signal receiving assembly;

the signal receiving assembly includes:

the external light supplement starting trigger signal receiving module is used for receiving the external light supplement starting trigger signal;

and the synchronous signal output module is used for sending the external light supplement starting trigger signal to the flash lighting assembly and controlling the flash lighting assembly to start lighting light supplement operation at the light supplement starting time when receiving the external light supplement starting trigger signal.

Further, the second processing component comprises:

the second data conversion module is used for converting the external light supplement starting trigger signal into a corresponding flash start-stop instruction according to a preset signal decoding mode;

the second judgment module is used for judging whether the flash start-stop control instruction is legal and complete;

and the second processing module is used for controlling the synchronous signal output module to send the external light supplementing starting trigger signal to the flash lighting assembly when the flash start-stop control instruction is legal and complete.

Further, the intelligent electronic device further comprises:

the environment light source sensor is arranged at the shell of the intelligent electronic equipment and used for detecting and acquiring the environment brightness information around the intelligent electronic equipment at the current moment;

the first judging module is used for calculating to obtain the brightness value of the current moment according to the light state information and the environment brightness information, judging whether the brightness value reaches a preset brightness threshold value, if so, supplementing light by an external flash light source, and otherwise, supplementing light by the external flash light source is not needed.

The invention also provides a photographing control method based on the external flash light source, which comprises intelligent electronic equipment, wherein the intelligent electronic equipment comprises a first processing component, an image acquisition component, a flash light source sensor, an internal flash light source and a signal sending component; the flash light source sensor is arranged on one side of the built-in flash light source; the method comprises the following steps:

the first processing assembly controls working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters, acquires light state information of the built-in flash light source and shooting state information of the image acquisition assembly in the corresponding working states, and generates an external light supplement starting trigger signal according to the light state information and the shooting state information; the external light supplement starting trigger signal comprises starting light supplement time;

the signal sending assembly sends the external light supplement starting trigger signal to an external flash light source, so that the external flash light source starts lighting light supplement work in the light supplement starting time according to the external light supplement starting trigger signal;

the image acquisition assembly starts shooting work after the flash lighting assembly starts lighting and supplementary lighting work.

Further, the intelligent electronic device further comprises: the environment light source sensor is arranged at the shell of the intelligent electronic equipment and is far away from the built-in flash light source; further comprising the steps of:

and the ambient light source sensor detects and acquires ambient brightness information around the intelligent electronic equipment at the current moment.

Further, the step of controlling the working states of the built-in flash light source and the image acquisition assembly by the first processing assembly according to a preset target brightness parameter, acquiring light state information of the built-in flash light source and shooting state information of the image acquisition assembly in a corresponding working state, and generating an external light supplement starting trigger signal according to the light state information and the shooting state information includes:

the first processing assembly judges whether an external flash light source is needed for light supplement;

the first processing assembly generates a photographing trigger signal when the external flash light source is not needed for light supplement;

when the external flash light source is required to supplement light, the first processing assembly controls the working states of the internal flash light source and the image acquisition assembly according to preset target brightness parameters, and acquires and records the light state information and the shooting state information, so that the starting light supplementing time is acquired according to the light state information and the shooting state information;

the first processing assembly generates the flash start-stop control instruction according to the light supplementing starting time;

and the first processing assembly converts the flash start-stop instruction into an external light supplement start trigger signal according to a preset signal conversion mode.

Further, the step of judging whether external flash light sources are needed for light supplement by the first processing assembly comprises:

the first processing assembly calculates to obtain the brightness value of the current moment according to the light state information and the environment brightness information;

and the first processing assembly judges whether the brightness value reaches a preset brightness threshold value, if so, the external flash light source is needed for light supplement, and otherwise, the external flash light source is not needed for light supplement.

Further, when the external flash light source is needed to supplement light, the first processing component controls the working states of the internal flash light source and the image acquisition component according to preset target brightness parameters, acquires and records the light state information and the shooting state information, and accordingly, the step of obtaining the light supplementing starting time according to the light state information and the shooting state information comprises the following steps:

when the intelligent electronic equipment needs light supplement by an external flash light source and does not perform shooting work, controlling the working states of the internal flash light source and the image acquisition assembly according to preset target brightness parameters, and acquiring light state information of the internal flash light source and shooting state information of the image acquisition assembly in different working states;

the first processing assembly identifies a shooting mode of the intelligent electronic equipment according to the light state information, obtains shooting time sequence parameters according to an identification result and the shooting state information, and obtains the light supplementing starting time according to the shooting time sequence parameter training.

Further, when the intelligent electronic device needs external flash light source light supplement and does not perform shooting, the working states of the internal flash light source and the image acquisition assembly are controlled according to preset target brightness parameters, light state information of the internal flash light source in different working states is acquired, and shooting state information of the image acquisition assembly comprises the following steps:

when the intelligent electronic equipment needs light supplement by an external flash light source and does not perform shooting work, the flash light source sensor detects the brightness of the internal flash light source as background brightness;

the built-in flash light source is started at the beginning time of the preparation process, the flash light source sensor starts to detect the brightness of the built-in flash light source at the beginning time of the preparation process, and then the brightness of the built-in flash light source is increased to the brightness required by focusing;

after the brightness is increased to the brightness required by focusing, the lens of the intelligent electronic equipment starts focusing under the drive of software, and the image acquisition assembly starts photometry after the focusing is finished;

the built-in flash light source is turned off at the end of the preparation process, and is turned on again at the beginning of the shooting process, and the brightness of the built-in flash light source is increased to the brightness required by shooting;

the image acquisition assembly starts exposure at the exposure starting time when the brightness of the built-in flash light source reaches the brightness required by shooting, the exposure is finished after the exposure lasts for a preset time, and the built-in flash light source is closed at the shooting flow finishing time after the exposure is finished;

the light state information comprises the background brightness, and the target brightness parameters comprise the brightness required by focusing and the brightness required by shooting; the shooting state information comprises a preparation process state, a shooting process state and time information corresponding to the preparation process state and the shooting process state respectively, and the time information comprises a preparation process starting time, a preparation process ending time, a shooting process starting time, an exposure starting time and a shooting process ending time.

Further, the step of identifying a shooting mode of the intelligent electronic device by the first processing assembly according to the light state information, obtaining shooting time sequence parameters according to an identification result and the shooting state information, and training to obtain the light supplement starting time according to the shooting time sequence parameters includes:

the first processing assembly identifies a shooting mode of the intelligent electronic equipment according to the light state information;

the first processing assembly analyzes the identification result, the shooting state information and the light state information to obtain the shooting time sequence parameters; the shooting time sequence parameters comprise a shooting process starting time and a shooting process ending time;

the first processing assembly sets a plurality of light supplement preparation times and calculates response light supplement times of a plurality of external flash light sources according to the light supplement preparation times and the shooting process starting time; the light supplement preparation time is the time length of the external flash light source relative to the internal flash light source;

the first processing assembly controls the image acquisition assembly to shoot according to the plurality of response light supplement time to obtain corresponding image data;

the first processing assembly judges whether the image brightness corresponding to the first processing assembly reaches a target brightness threshold value or not according to each image data, acquires the light supplement preparation time corresponding to all the image brightness reaching the target brightness threshold value, and determines the minimum light supplement preparation time as the starting light supplement time of the external flash light source.

The invention also provides a storage medium, wherein at least one instruction is stored in the storage medium, and the instruction is loaded and executed by a processor to realize the operation executed by the photographing control method based on the external flash light source.

The photographing control method, the photographing control system and the storage medium based on the external flash light source provided by the invention can realize synchronous control of the external flash light source during exposure of the image acquisition assembly without changing software and hardware of intelligent electronic equipment, and provide additional illumination. .

Drawings

The above features, technical features, advantages and implementations of a photographing control method, system and storage medium based on an external flash light source will be further described in the following detailed description of preferred embodiments with reference to the accompanying drawings.

FIG. 1 is a flowchart of an embodiment of a photographing control method based on an external flash light source according to the present invention;

FIG. 2 is a flowchart illustrating another embodiment of a photographing control method based on an external flash light source according to the present invention;

FIG. 3 is a flowchart illustrating another embodiment of a photographing control method based on an external flash light source according to the present invention;

fig. 4 and 5 are flowcharts illustrating another embodiment of a photographing control method based on an external flash light source according to the present invention;

FIG. 6 is a general flow diagram of an intelligent electronic device capturing an image using a built-in flash light source;

FIG. 7 is a timing diagram illustrating the time for acquiring the light supplement starting time according to the present invention;

FIG. 8 is a timing diagram of delayed shooting of an external flash light source of the intelligent electronic device;

fig. 9 is a schematic structural diagram of a photographing control system based on an external flash light source according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

One embodiment of the invention, as shown in fig. 1, is a photographing control method based on an external flash light source, including an intelligent electronic device, where the intelligent electronic device includes a first processing component, an image acquisition component, a flash light source sensor, an internal flash light source, and a signal sending component; the flash light source sensor is arranged on one side of the built-in flash light source; the method comprises the following steps:

s1000, a first processing assembly controls working states of a built-in flash light source and an image acquisition assembly according to preset target brightness parameters, acquires light state information of the built-in flash light source and shooting state information of the image acquisition assembly in the corresponding working states, and generates an external light supplement starting trigger signal according to the light state information and the shooting state information; the external light supplement starting trigger signal comprises starting light supplement time;

in particular, the intelligent electronic device includes an intelligent mobile phone, a computer, a tablet, a notebook, and the like. The image acquisition assembly is a front camera and/or a rear camera of the intelligent electronic equipment. The first processing component is typically a processor of the intelligent electronic device. The first processing assembly controls the working states of the built-in flash light source and the image acquisition assembly, so that the built-in flash light source is switched to the corresponding working state according to the preset control flow, and the image acquisition assembly is switched to the corresponding working state according to the preset control flow. The flash light source sensor detects light state information of the built-in flash light source in real time, the first processing assembly acquires the light state information from the flash light source sensor after the built-in flash light source is controlled to be switched to a corresponding working state according to a preset control flow, and the first processing assembly acquires shooting state information from the image acquisition assembly after the image acquisition assembly is controlled to be switched to the corresponding working state according to the preset control flow. The first processing assembly analyzes the light state information and the shooting state information and generates an external light supplement starting trigger signal including starting light supplement time according to an analysis result.

S2000, the signal sending component sends an external light supplement starting trigger signal to the external flash light source, so that the external flash light source starts lighting and light supplement work in the light supplement starting time according to the external light supplement starting trigger signal;

and the S3000 image acquisition assembly starts shooting work after the flash illumination assembly starts illumination and supplementary lighting work.

At present, most of intelligent electronic equipment (such as intelligent mobile phones) with shooting function in the market use lighting devices (LED light supplement lamps) of the equipment, and the devices have small power and fixed light source positions, so that the requirements of light intensity and light distribution during shooting are difficult to meet. Xenon flash lamps, also known as high intensity discharge gas lamps, can output light much more than an LED light source in a short time and have superior light color rendering properties. The xenon flash lamp can be used for shooting high-quality pictures under the condition of long shooting distance or weak ambient light. At present, most of intelligent electronic devices (such as intelligent mobile phones) with shooting functions in the market do not have a special external flash starting instruction transmission interface and cannot synchronously control an external flash lighting device. At present, most of intelligent electronic devices (such as intelligent mobile phones) with shooting functions in the market have wireless signal (such as bluetooth, Wi-Fi and other wireless communication protocols) transmission capability, but due to the limitation of the wireless communication protocols or the performance limitation of the built-in operating systems of the intelligent electronic devices, the flash starting instructions cannot be sent in real time.

In this embodiment, after the first processing component generates the external fill-in light activation trigger signal according to the light status information and the shooting status information, the signal sending component obtains the external fill-in light activation trigger signal from the first processing component, and sends the external fill-in light activation trigger signal to the external flash light source having a wireless communication mode matching with the intelligent electronic device, that is, the external flash light source has a wireless communication function as the intelligent electronic device, after the external flash light source receives the external fill-in light activation trigger signal from the intelligent electronic device, the external flash light source decodes the external fill-in light activation trigger signal to obtain the start fill-in light time in the external fill-in light activation trigger signal, so that the external flash light source starts the lighting and fill-in light when the start fill-in light time reaches, which is used by the intelligent electronic device having the shooting function, and is used when the brightness of the internal flash light source of the intelligent electronic device is insufficient, the flash starting time of the external flash light source is controlled, so that the flash starting time of the external flash light source can be supplemented with light before exposure and shooting of an image acquisition assembly of the intelligent electronic equipment, and the shooting effect is improved.

In an embodiment of the present invention, as shown in fig. 2, a photographing control method based on an external flash light source, the intelligent electronic device further includes: the environment light source sensor is arranged at the position of the intelligent electronic equipment shell and is far away from the intelligent electronic equipment shell and internally provided with the flash light source;

s1100, judging whether light supplement is needed by an external flash light source through a first processing assembly;

s1200, the first processing assembly generates a photographing trigger signal when the external flash light source is not needed for light supplement;

s1300, when the external flash light source is needed to supplement light, the first processing assembly controls the working states of the internal flash light source and the image acquisition assembly according to preset target brightness parameters, and obtains and records light state information and shooting state information, so that light supplementing starting time is obtained according to the light state information and the shooting state information;

specifically, the intelligent electronic device judges whether external flash light source light supplement is needed according to environment brightness information obtained by detection of the environment light source sensor and light state information obtained by detection of the flash light source sensor, generates a photographing trigger signal if external flash light source light supplement is not needed, provides light with required intensity for photographing by the built-in flash light source and/or the external environment light source, and directly enables the camera to perform photographing work after receiving the photographing trigger signal. The preset target brightness parameter includes a focusing required brightness (I1), and each image capturing component (e.g. camera) equipped with the intelligent electronic device has its own corresponding focusing required brightness (I1), which is a default value and will not be described in detail herein.

S1400, the first processing component generates a flash start-stop control instruction according to the light supplementing starting time;

s1500, the first processing assembly converts the flash start-stop instruction into an external light supplement start trigger signal according to a preset signal conversion mode;

Specifically, the preset signal conversion mode can be that the flash start-stop instruction is converted into an external light supplement start trigger signal of a binary system or a six-system, decimal and other types, so that the external light supplement start trigger signal obtained after conversion is conveniently sent to the external flash light source by the intelligent electronic device in a wireless communication mode, and the intelligent electronic device with the shooting function can drive the external flash light source to synchronously work for lighting light supplement before exposure during shooting without extra electrical/signal connection.

In an embodiment of the present invention, as shown in fig. 3, a photographing control method based on an external flash light source, the intelligent electronic device further includes: the environment light source sensor is arranged at the position of the intelligent electronic equipment shell and is far away from the intelligent electronic equipment shell and internally provided with the flash light source;

s0100, detecting by an ambient light source sensor at the current moment to acquire ambient brightness information around the intelligent electronic device;

specifically, because the ambient light source sensor is disposed at the housing of the intelligent electronic device, and the ambient light source sensor is far away from the built-in flash light source that can only be used for the electronic device, the ambient light source sensor can detect ambient brightness information around the intelligent electronic device at each moment, and the ambient brightness information includes ambient brightness values around the intelligent electronic device and a timestamp corresponding to the ambient brightness values. When a user presses a shooting start button (or a shooting control) of the intelligent electronic device to shoot, the ambient light source sensor detects ambient brightness values around the intelligent electronic device when the user triggers the shooting start, and ambient brightness information around the intelligent electronic device at the current moment is obtained.

S1110, calculating to obtain the brightness value of the current moment by the first processing assembly according to the light state information and the environment brightness information;

s1120, the first processing module determines whether the luminance value reaches a preset luminance threshold, if so, the external flash light source is needed for light supplement, otherwise, the external flash light source is not needed for light supplement;

specifically, the flash light source sensor can acquire light state information of the built-in flash light source at each moment, and the light state information includes light source brightness values around the built-in flash light source and a timestamp corresponding to the light source brightness values. After the first processing component acquires the light state information and the environment brightness information, since the light state information and the environment brightness information both include the brightness value obtained by detection and the timestamp corresponding to the brightness value, the brightness value at the current time can be obtained by performing sum value calculation according to the light source brightness value at the current time and the environment brightness value at the current time. The first processing assembly judges whether the brightness value at the current moment reaches a preset brightness threshold value, if so, the light intensity of the external environment and the brightness of the built-in flash light source for light supplement meet the brightness requirement for shooting by the image acquisition assembly at the current moment, and therefore the external flash light source is not needed for light supplement. Otherwise, an external flash light source is needed for light supplement.

s1310, when the intelligent electronic device needs light supplement by an external flash light source and does not perform shooting work, controlling the working states of the internal flash light source and the image acquisition assembly according to preset target brightness parameters, and acquiring light state information of the internal flash light source and shooting state information of the image acquisition assembly in different working states;

s1320, the first processing component identifies a shooting mode of the intelligent electronic device according to the light state information, obtains shooting time sequence parameters according to the identification result and the shooting state information, and obtains light supplementing starting time according to the shooting time sequence parameter training;

In an embodiment of the present invention, as shown in fig. 4 and 5, a photographing control method based on an external flash light source, the intelligent electronic device further includes: the environment light source sensor is arranged at the position of the intelligent electronic equipment shell and is far away from the intelligent electronic equipment shell and internally provided with the flash light source;

s1311, when the intelligent electronic device needs light supplement by the external flash light source and does not perform shooting, detecting the brightness of the internal flash light source by the flash light source sensor to serve as background brightness (I0);

s1312, the built-in flash light source is turned on at the preparation flow starting time (t1), the flash light source sensor starts to detect the brightness of the built-in flash light source at the preparation flow starting time, and then the brightness of the built-in flash light source is increased to the brightness required by focusing (I1);

s1313 after the brightness is adjusted to the brightness required for focusing, the lens of the intelligent electronic device starts focusing under the drive of software, and the image acquisition assembly starts photometry after focusing is completed;

s1314, turning off the built-in flash light source at the finishing time (t4) of the preparation process, turning on the built-in flash light source again at the starting time (t5) of the shooting process, and increasing the brightness of the built-in flash light source to the brightness required by shooting (I2);

s1315, the image acquisition assembly starts exposure at an exposure starting time (t6) after the brightness of the built-in flash light source reaches the shooting required brightness (I2), the exposure is finished after the exposure lasts for a preset time length, and the built-in flash light source is turned off at a shooting process finishing time (t8) after the exposure is finished;

s1321, identifying a shooting mode of the intelligent electronic equipment by the first processing assembly according to the light state information;

specifically, as shown in fig. 6, a general flow of the intelligent electronic device capturing an image using a built-in flash light source is as shown in fig. 6 below:

the initial state detects the luminance of the built-in flash light source as the background luminance (I0).

At time t1, which is the start time of the preparation process, the intelligent electronic device enters the preparation mode, and the built-in flash light source of the intelligent electronic device is turned on and the brightness is adjusted to the brightness required for focusing (I1).

At time t2, the lens of the intelligent electronic device starts focusing under software driving (a).

At time t3, the image capture assembly of the intelligent electronic device performs photometry (b).

And at the time t4, the built-in flash light source of the intelligent electronic device is turned off, wherein the time t1 to the time t4 are all the time when the intelligent electronic device is in a shooting preparation mode.

At time t5, when the shooting flow starts, the built-in flash light source of the intelligent electronic device is turned on again, and the brightness is adjusted to the brightness required by shooting (I2).

At time t6, the image capture assembly begins exposure.

At time t7, the image capture assembly exposure is complete.

And at the time t8, the built-in flash light source of the intelligent electronic device is turned off.

S1322, the first processing component analyzes the identification result, the shooting state information and the light ray state information to obtain shooting time sequence parameters; the shooting time sequence parameters comprise the starting time of the shooting process and the ending time of the shooting process;

s1323, setting a plurality of light supplement preparation times by the first processing assembly, and calculating response light supplement times of a plurality of external flash light sources according to the light supplement preparation times and the shooting process starting time; the light supplement preparation time is the time length of the external flash light source relative to the internal flash light source to start working;

s1324, the first processing assembly controls the image acquisition assembly to shoot according to the response light supplementing time to obtain corresponding image data;

s1325, the first processing assembly judges whether the corresponding image brightness of each image data reaches a target brightness threshold value or not according to each image data, acquires the light supplement preparation time corresponding to all the image brightness reaching the target brightness threshold value, and determines the minimum light supplement preparation time as the starting light supplement time of the external flash light source;

specifically, the first processing assembly sets the time length of the external flash light source relative to the time length of the internal flash light source starting to work as initial light supplement preparation time, calculates to obtain first response light supplement time of the external flash light source according to the light supplement preparation time and the shooting process starting time, controls the image acquisition assembly to shoot at the first response light supplement time to obtain corresponding image data, judges whether the image brightness of the image reaches a target brightness threshold value according to the image data corresponding to the first response light supplement time, and records the initial light supplement preparation time if the image brightness of the image reaches the target brightness threshold value. Then, the first processing component sets a corresponding time training sequence according to the initial light supplement preparation time to obtain a plurality of candidate light supplement preparation times, calculates and obtains a corresponding candidate response light supplement time according to the candidate light supplement preparation times, shoots the candidate response light supplement time, and judges whether the image brightness of the shot image data reaches a target brightness threshold value. And repeating the steps, obtaining the light supplement preparation time corresponding to the brightness of all the images reaching the target brightness threshold, and determining the minimum light supplement preparation time as the starting light supplement time of the external flash light source.

s3000, starting shooting work by the image acquisition component after the flash lighting component starts lighting and supplementary lighting;

the light state information comprises background brightness (I0), and the target brightness parameters comprise brightness required for focusing (I1) and brightness required for shooting (I2); the shooting status information includes a preparation flow status, a shooting flow status, and time information corresponding thereto, respectively, and the time information includes a preparation flow start time (t1), a preparation flow end time (t4), a shooting flow start time (t5), an exposure start time (t6), and a shooting flow end time (t 8).

Specifically, continuing the workflow corresponding to fig. 6, in order to obtain an accurate exposure time, the following parameters in the workflow need to be measured and stored: background luminance (I0), preparation flow start time (t1), preparation flow end time (t4), shooting flow start time (t5), shooting required luminance (I2), exposure start time (t6), and shooting flow end time (t 8). The preparation process and the shooting process are distinguished by measuring the output light intensity and the light intensity change of the built-in flash light source of the intelligent electronic device by using a sensor, as shown in fig. 7 and 8, and the identification conditions are as follows:

in the initial state, the luminance of the built-in flash light source is detected as the background luminance (I0). When the brightness of the built-in flash light source is detected to increase from the background brightness (I0) to the brightness required for focusing (I1) for a first time, the flash light source can be judged to enter the preparation mode after being kept for a period of time. When the first decrease in brightness of the built-in flash light source to the background brightness is detected (I0), it can be determined that the standby mode is exited. When the brightness of the built-in flash light source is detected to increase from the background brightness (I0) to the brightness required for shooting (I2) for a second time, the shooting mode can be judged to be entered after the brightness is maintained for a period of time. When the second brightness decrease of the built-in flash light source to the background brightness is detected (I0), it is judged that the shooting mode is exited and the initial state is returned.

Due to the limitation of software and hardware design of intelligent electronic equipment, the exposure starting time (t6) of an image acquisition assembly cannot be directly measured, the invention is measured by an indirect measurement method, and the principle and the method are as follows:

by the camera photography principle, the brightness of the image captured by the camera depends on the integral of all light intensities received by the image acquisition assembly during the exposure period (from time t6 to time t7, TE in time length). The time length of the external flash light source relative to the internal flash light source for starting working is TX, the time when the external flash light source starts working is t5+ TX, and the light emitting time length of the external flash light source is TF.

Therefore, as long as t5+ TX is guaranteed to be later than the exposure start time t6 of the image acquisition assembly, and t5+ TX + TF (the time when the external flash light source finishes working) is earlier than the exposure end time t7 of the image acquisition assembly, the external flash light source can be guaranteed to form effective illumination. Since the start time of the built-in flash light source is the start time of the shooting process (t5), the time difference (denoted as Td ═ t6-t5) between the start time of the built-in flash light source and the start time of the exposure of the image capturing assembly can be calculated, and the time difference Td (namely the start fill light time of the present invention) can be obtained. Influenced by the design of software and hardware of the intelligent electronic equipment, the Td can be changed along with the configuration of the software and hardware, so that the method disclosed by the invention can be used for measuring the Td by the following method:

i. assuming that the time length of the external flash light source starting to work (i.e., the time of entering the shooting mode) relative to the internal flash light source is TX (i.e., the light supplement preparation time of the present invention), setting an initial value, that is, TX ═ x 0;

taking a photograph using the intelligent electronic device;

measuring the starting time t5 of the shooting stage of the intelligent electronic equipment by the identification method of the preparation process and the shooting process;

controlling the external flash light source to work at the time t5+ TX (namely responding to the light supplement time);

v, reading an image shot by the intelligent electronic equipment, checking whether the brightness of the image meets the expectation, and if the brightness of the image meets the expectation, recording TX;

set a new value for TX, that is, TX — xn (i.e., the candidate light fill preparation time of the present invention), xn — 1+ dt, n — 1 … m, dt is a relatively small time interval (e.g., 500 us);

returning to the step ii to continue shooting until m times of shooting are finished;

and viii, detecting all TX values which are expected to be shot, and selecting the smallest TX value as the Td.

When Td is measured by the above method, the exposure start time t6 is t5+ Td.

In addition, external flash light source control is carried out by using parameters obtained by training, and the external flash light source control method comprises the following steps:

a) the following physical quantities were measured and recorded:

i. measuring the output light intensity IL (light source brightness value) of a built-in flash light source of the intelligent electronic equipment;

recording the time when the output light intensity IL of the built-in flash light source of the intelligent electronic equipment is changed remarkably;

optionally collecting sound emitted by the intelligent electronic equipment;

b) and judging whether to send an external flash light source control signal or not by adopting the following procedures according to the acquired time and physical quantity:

i. starting to work;

entering an initial state, and periodically detecting the output light intensity IL of the built-in flash light source;

if the brightness of the built-in flash light source is detected to be increased for the first time, namely the difference delta IL between two sampling within a certain time is larger than the set threshold parameter p1, the output light intensity IL is in a range near the pre-stored brightness (I1) required by focusing, and the preset time duration is kept, and then the device enters a preparation state;

detecting that the brightness of the built-in flash light source is reduced to the background brightness for the first time, namely that the delta IL is less than the set threshold parameter p2 and IL is approximately equal to I0, judging that the flash light source is out of the preparation state;

v, detecting the second brightness increase of the built-in flash light source, increasing the brightness of the built-in flash light source to a pre-stored full-power brightness, namely a range near the brightness (I2) required by shooting, keeping for a period of time, and entering a shooting state;

vi, after delaying the pre-storage time interval Td from the moment when the process iv enters the shooting state, sending an external light supplement starting trigger signal to the external flash light source so as to light the external flash light source;

detecting that the secondary brightness IL of the built-in flash light source is reduced to background brightness I0, optionally detecting that the intelligent electronic equipment emits a photographing sound, and quitting the photographing state;

return to initial state.

According to the embodiment, the intelligent electronic equipment with the shooting function is used for controlling the flash starting time of the external flash light source when the brightness of the internal flash light source of the intelligent electronic equipment is insufficient, so that the flash starting time of the external flash light source can be supplemented with light before an image acquisition assembly of the intelligent electronic equipment is exposed and shot, and the shooting effect is improved.

In an embodiment of the present invention, as shown in fig. 9, a photographing control system based on an external flash light source includes;

the external flash light source comprises a second processing component, a signal receiving component and a flash lighting component;

the first processing assembly is used for controlling the working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters, acquiring light state information of the built-in flash light source and shooting state information of the image acquisition assembly in the corresponding working states, and generating an external light supplementing starting trigger signal according to the light state information and the shooting state information; the external light supplement starting trigger signal comprises starting light supplement time;

the signal sending assembly is used for sending an external supplementary lighting starting trigger signal when the signal sending time is up;

the signal receiving component is used for receiving an external light supplement starting trigger signal;

the second processing assembly is used for controlling the flash lighting assembly to start lighting supplementary lighting operation in the supplementary lighting starting time according to the external supplementary lighting starting trigger signal;

and the image acquisition assembly is used for starting shooting work after the flash illumination assembly starts illumination and light supplement work.

Based on the foregoing embodiments, the first processing component includes:

the first judgment module is used for judging whether light supplement of an external flash light source is needed;

the first processing module is further used for controlling the working states of the built-in flash light source and the image acquisition assembly according to preset target brightness parameters when the external flash light source is required to supplement light, acquiring and recording light state information and shooting state information, so that starting light supplement time is obtained according to the light state information and the shooting state information, and a flash start-stop control instruction is generated according to the starting light supplement time;

Based on the foregoing embodiments, the signal transmission assembly includes:

the wireless data transmission module is used for sending a photographing trigger signal to the image acquisition assembly and controlling the image acquisition assembly to start photographing work when receiving the photographing trigger signal;

the external light supplement starting triggering signal sending module is used for sending an external light supplement starting triggering signal to the signal receiving assembly;

the signal receiving assembly includes:

the external light supplement starting trigger signal receiving module is used for receiving an external light supplement starting trigger signal;

and the synchronous signal output module is used for sending an external light supplement starting trigger signal to the flash lighting assembly and controlling the flash lighting assembly to start lighting light supplement work in the light supplement starting time when receiving the external light supplement starting trigger signal.

Based on the foregoing embodiment, the second processing component includes:

the second data conversion module is used for converting the external light supplement starting trigger signal into a corresponding flash starting and stopping instruction according to a preset signal decoding mode;

and the second processing module is used for controlling the synchronous signal output module to send an external light supplementing starting trigger signal to the flash lighting assembly when the flash start-stop control instruction is legal and complete.

Based on the foregoing embodiment, the intelligent electronic device further includes:

the first judgment module is used for calculating to obtain a brightness value at the current moment according to the light state information and the environment brightness information, judging whether the brightness value reaches a preset brightness threshold value, if so, supplementing light by using an external flash light source, and otherwise, supplementing light by using the external flash light source is not needed.

Specifically, this embodiment is a device embodiment corresponding to the method embodiment, and specific effects refer to the method embodiment, which is not described in detail herein.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of program modules is illustrated, and in practical applications, the above-described distribution of functions may be performed by different program modules, that is, the internal structure of the apparatus may be divided into different program units or modules to perform all or part of the above-described functions. Each program module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one processing unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software program unit. In addition, the specific names of the program modules are only used for distinguishing the program modules from one another, and are not used for limiting the protection scope of the application.

In an embodiment of the present invention, a storage medium stores at least one instruction, and the instruction is loaded and executed by a processor to implement the operations performed by the embodiment of the photographing control method based on an external flash light source. For example, the computer readable storage medium may be a read-only memory (ROM), a random-access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

They may be implemented in program code that is executable by a computing device such that it is executed by the computing device, or separately, or as individual integrated circuit modules, or as a plurality or steps of individual integrated circuit modules. Thus, the present invention is not limited to any specific combination of hardware and software.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or recited in detail in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described apparatus/terminal device embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by sending instructions to relevant hardware through a computer program, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises: computer program code which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the content of the computer readable storage medium can be increased or decreased according to the requirements of the legislation and patent practice in the jurisdiction, for example: in certain jurisdictions, in accordance with legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunications signals.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a control system that shoots based on external flash light source which characterized in that includes:

2. The external flash light source-based photographing control system of claim 1, wherein the first processing component comprises:

3. The system as claimed in claim 2, wherein the signal transmitting module comprises:

the signal receiving assembly includes:

4. The external flash light source-based photographing control system of claim 3, wherein the second processing component comprises:

5. The system as claimed in claim 2, wherein the intelligent electronic device further comprises:

6. A photographing control method based on an external flash light source is characterized by comprising intelligent electronic equipment, wherein the intelligent electronic equipment comprises a first processing assembly, an image acquisition assembly, a flash light source sensor, an internal flash light source and a signal sending assembly; the flash light source sensor is arranged on one side of the built-in flash light source; the method comprises the following steps:

7. The photographing control method based on the external flash light source as claimed in claim 6, wherein the intelligent electronic device further comprises: the environment light source sensor is arranged at the shell of the intelligent electronic equipment and is far away from the built-in flash light source; further comprising the steps of:

8. The photographing control method based on the external flash light source according to claim 7, wherein the first processing component controls working states of the internal flash light source and the image acquisition component according to preset target brightness parameters, acquires light state information of the internal flash light source and photographing state information of the image acquisition component in a corresponding working state, and generates the external light supplement start trigger signal according to the light state information and the photographing state information, including the steps of:

9. The photographing control method based on the external flash light source of claim 8, wherein the first processing module determining whether supplementary lighting of the external flash light source is required comprises:

10. The photographing control method based on the external flash light source as claimed in claim 8, wherein the first processing module controls the working states of the internal flash light source and the image acquisition module according to preset target brightness parameters when the external flash light source is required to supplement light, and obtains and records the light state information and the photographing state information, so as to obtain the light supplement starting time according to the light state information and the photographing state information, including the steps of:

11. The photographing control method based on the external flash light source according to claim 10, wherein when the intelligent electronic device needs supplementary lighting of the external flash light source and does not perform photographing operation, the method controls the operating states of the internal flash light source and the image acquisition assembly according to preset target brightness parameters, and obtains light state information of the internal flash light source in different operating states and photographing state information of the image acquisition assembly comprises the steps of:

12. The photographing control method based on the external flash light source of claim 11, wherein the first processing module identifies a photographing mode of the intelligent electronic device according to the light status information, obtains a photographing timing sequence parameter according to an identification result and the photographing status information, and obtains the light supplement starting time according to the photographing timing sequence parameter training comprises the steps of:

13. A storage medium storing at least one instruction, the instruction being loaded and executed by a processor to implement the operations performed by the external flash light source-based photographing control method according to any one of claims 6 to 12.