CN105791711A - Shooting light supplement apparatus and method thereof - Google Patents
Shooting light supplement apparatus and method thereof Download PDFInfo
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- CN105791711A CN105791711A CN201610283520.7A CN201610283520A CN105791711A CN 105791711 A CN105791711 A CN 105791711A CN 201610283520 A CN201610283520 A CN 201610283520A CN 105791711 A CN105791711 A CN 105791711A
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- color temperature
- correlated color
- tristimulus values
- light filling
- averaging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
Abstract
The invention discloses a shooting light supplement apparatus and a method thereof. A detection module, a matching module and a light supplement module are included. The method is characterized by detecting a condition of triggering light supplement during shooting; when a situation of according with the condition of triggering light supplement is determined, matching a three-color value corresponding to a correlation color temperature under a current environment; and according to the matched three-color value, carrying out light supplement on light brightness under the current environment. When the shooting is started, according to the correlation color temperature of the current environment, the corresponding three-color value is adjusted so as to carry out light supplement so that an effect after the light supplement is close to ambient light, color rendition is convenient and an experience degree of a user is increased.
Description
Technical field
The present invention relates to technical field of image processing, espespecially a kind of apparatus and method shooting light filling.
Background technology
At present, development along with mobile terminal, present mobile phone is possible not only to meet daily communication function, the life of photographic recording people can also be carried out, increasing people like being taken pictures by portable mobile phone, when user shoots under more dim environment, it is easy to due to under-exposure, cause that the effect of shooting is undesirable.
In prior art, independent LCD or other light sources generally can be adopted under dim environment as light filling, obtain maximum light filling effect by improving LCD brightness.
But, adopt prior art, when on LCD, the color of filling and the photochromic of environment light differ greatly, white balance is done only in environment, LCD or both interpolation, but no matter which kind of mode, running into this situation, on picture, some is colour cast certainly, causes great difficulty to color rendition.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of apparatus and method shooting light filling, it is possible to regulate corresponding tristimulus values according to the correlated color temperature of current environment and carry out light filling, so that effect is close with environment light after light filling, it is easy to color rendition, improves the Experience Degree of user.
In order to reach the object of the invention, first aspect, the invention provides a kind of device shooting light filling, this device includes:
Detection module, matching module and supplementary lighting module；
Described detection module, triggers the condition of light filling when being set to detection shooting；
Described matching module, when being set to the condition being determined for compliance with triggering light filling, then the tristimulus values that the correlated color temperature under coupling current environment is corresponding；
Described supplementary lighting module, is set to the tristimulus values after according to coupling and the light luminance under current environment is carried out light filling.
In one embodiment, when described matching module is set to the condition being determined for compliance with triggering light filling, refer to:
Described matching module be set to detect when receiving the operational order triggering light filling or detect under current environment light luminance lower than predetermined threshold value time meet the condition triggering light filling.
In one embodiment, this device also includes: build table module；
Described build tristimulus values corresponding to correlated color temperature that table module is set under coupling current environment before, measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
In one embodiment, this device also includes: cache module；
Described cache module is set to obtain each frame data of current image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity.
In one embodiment, when described matching module is set to the condition being determined for compliance with triggering light filling, then mates corresponding tristimulus values according to the correlated color temperature under current environment, refer to:
When described matching module is set to the condition being determined for compliance with triggering light filling, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is equal to the correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
Second aspect, the invention provides a kind of method shooting light filling, including:
The condition of light filling is triggered during detection shooting；
When being determined for compliance with the condition triggering light filling, then the tristimulus values that the correlated color temperature under coupling current environment is corresponding；
According to the tristimulus values after coupling, the light luminance under current environment is carried out light filling.
In one embodiment, it is determined that meet trigger light filling condition, including:
The condition triggering light filling is met when the light luminance detected when receiving the operational order triggering light filling or detect under current environment is lower than predetermined threshold value.
In one embodiment, before mating the tristimulus values that the correlated color temperature under current environment is corresponding, also include:
Measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
In one embodiment, after the light luminance under detection current environment, also include:
Obtain each frame data of present image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity in real time.
In one embodiment, when the light luminance under current environment is lower than predetermined threshold value, then mate corresponding tristimulus values according to the correlated color temperature under current environment, including:
When light luminance under current environment is lower than predetermined threshold value, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is equal to the correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, correlated color temperature is corresponding.
In one embodiment, described predetermined matched rule, including:
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
Embodiments provide the apparatus and method of a kind of buffered video frame, including: detection module, matching module and supplementary lighting module, the condition of light filling is triggered during detection shooting, when being determined for compliance with the condition triggering light filling, the tristimulus values that then correlated color temperature under coupling current environment is corresponding, according to the tristimulus values after coupling, the light luminance under current environment is carried out light filling, during by opening shooting, correlated color temperature according to current environment regulates corresponding tristimulus values and carries out light filling, so that effect is close with environment light after light filling, it is easy to color rendition, improve the Experience Degree of user.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention.The purpose of the present invention and other advantages can be realized by structure specifically noted in description, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Accompanying drawing is for providing being further appreciated by technical solution of the present invention, and constitutes a part for description, is used for explaining technical scheme, is not intended that the restriction to technical solution of the present invention together with embodiments herein.
Fig. 1 is the hardware architecture diagram realizing each one optional mobile terminal of embodiment of the present invention；
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1；
Fig. 3 is the structural representation of a kind of device embodiment one shooting light filling provided by the invention；
Fig. 4 is the structural representation of a kind of device embodiment two shooting light filling provided by the invention；
Fig. 5 is the schematic flow sheet of a kind of embodiment of the method one shooting light filling provided by the invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The mobile terminal realizing each embodiment of the present invention is described referring now to accompanying drawing.In follow-up description, use the suffix being used for representing such as " module ", " parts " or " unit " of element only for being conducive to the explanation of the present invention, itself do not have specific meaning.Therefore, " module " and " parts " can mixedly use.
Mobile terminal can be implemented in a variety of manners.Such as, the terminal described in the present invention can include the mobile terminal of such as mobile phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (panel computer), PMP (portable media player), guider etc. and the fixed terminal of such as numeral TV, desk computer etc..Hereinafter it is assumed that terminal is mobile terminal.However, it will be understood by those skilled in the art that, except being used in particular for the element of mobile purpose, structure according to the embodiment of the present invention can also apply to the terminal of fixed type.
Fig. 1 is the hardware configuration signal of the mobile terminal realizing each embodiment of the present invention.
Mobile terminal 100 can include A/V (audio/video) input block 120, user input unit, sensing unit 140, output unit 150, memorizer 160, controller 180 and power subsystem 190 etc..Fig. 1 illustrates the mobile terminal with various assembly, it should be understood that be not required for implementing all assemblies illustrated.Can alternatively implement more or less of assembly.Will be discussed in more detail below the element of mobile terminal.
A/V input block 120 is used for receiving audio or video signal.A/V input block 120 can include camera 121, and the view data of the camera 121 static images to being obtained by image capture apparatus in Video Capture pattern or image capture mode or video processes.Picture frame after process may be displayed on display unit 151.Picture frame after camera 121 processes can be stored in memorizer 160 (or other storage medium) or be transmitted via wireless communication unit 110, it is possible to provide two or more cameras 1210 according to the structure of mobile terminal.
User input unit 130 can generate key input data to control the various operations of mobile terminal according to the order of user's input.User input unit 130 allows user to input various types of information, and can include keyboard, metal dome, touch pad (such as, detection due to touched and cause resistance, pressure, electric capacity etc. the sensitive component of change), roller, rocking bar etc..Especially, when touch pad is superimposed upon on display unit 151 as a layer, it is possible to form touch screen.
Sensing unit 140 detects the current state of mobile terminal 100, (such as, mobile terminal 100 open or close state), the position of mobile terminal 100, user for mobile terminal 100 contact (namely, touch input) presence or absence, the orientation of mobile terminal 100, mobile terminal 100 acceleration or deceleration move and direction etc., and generate the order of operation for controlling mobile terminal 100 or signal.Such as, when mobile terminal 100 is embodied as sliding-type mobile phone, sensing unit 140 can sense this sliding-type phone and open or close.It addition, sensing unit 140 can detect whether power subsystem 190 provides electric power to couple.Sensing unit 140 can include proximity transducer 1410 and below in conjunction with touch screen, this will be described.
Output unit 150 can include display unit 151, alarm unit 153 etc..
Display unit 151 may be displayed on the information processed in mobile terminal 100.Such as, when mobile terminal 100 is in telephone calling model, display unit 151 can show the user interface (UI) relevant with call or other communicate (such as, text messaging, multimedia file download etc.) or graphic user interface (GUI).When being in video calling pattern or image capture mode when mobile terminal 100, display unit 151 can show the image of image and/or the reception caught, UI or GUI illustrating video or image and correlation function etc..
Meanwhile, when display unit 151 and touch pad as a layer superposed on one another to form touch screen time, display unit 151 can serve as input equipment and output device.Display unit 151 can include at least one in liquid crystal display (LCD), thin film transistor (TFT) LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc..Some in these display may be constructed such that transparence is to allow user to watch from outside, and this is properly termed as transparent display, and typical transparent display can be such as TOLED (transparent organic light emitting diode) display etc..According to the specific embodiment wanted, mobile terminal 100 can include two or more display units (or other display device), such as, mobile terminal can include outernal display unit (not shown) and inner display unit (not shown).Touch screen can be used for detecting touch input pressure and touch input position and touch input area.
Memorizer 160 can store the process performed by controller 180 and the software program controlling operation etc., or can temporarily store the data (such as, telephone directory, message, still image, video etc.) that oneself maybe will export through output.And, memorizer 160 can store the vibration about the various modes exported when touching and being applied to touch screen and the data of audio signal.
Memorizer 160 can include the storage medium of at least one type, described storage medium includes flash memory, hard disk, multimedia card, card-type memorizer (such as, SD or DX memorizer etc.), random access storage device (RAM), static random-access memory (SRAM), read only memory (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory (PROM), magnetic storage, disk, CD etc..And, mobile terminal 100 can be connected the network storage device cooperation of the storage function performing memorizer 160 with by network.
Controller 180 generally controls the overall operation of mobile terminal.Such as, controller 180 performs the control relevant to voice call, data communication, video calling etc. and process.It addition, controller 180 can include the multi-media module 1810 for reproducing (or playback) multi-medium data, multi-media module 1810 can construct in controller 180, or it is so structured that separates with controller 180.Controller 180 can perform pattern recognition process, so that the handwriting input performed on the touchscreen or picture drafting input are identified as character or image.
Power subsystem 190 receives external power or internal power under the control of controller 180 and provides the suitable electric power operated needed for each element and assembly.
Various embodiment described herein can to use such as computer software, hardware or its any combination of computer-readable medium to implement.Hardware is implemented, embodiment described herein can pass through to use application-specific IC (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, at least one that is designed to perform in the electronic unit of function described herein to implement, in some cases, such embodiment can be implemented in controller 180.Implementing for software, the embodiment of such as process or function can be implemented with allowing the independent software module performing at least one function or operation.Software code can be implemented by the software application (or program) write with any suitable programming language, and software code can be stored in memorizer 160 and be performed by controller 180.
So far, oneself is through describing mobile terminal according to its function.Below, for the sake of brevity, by the slide type mobile terminal in the various types of mobile terminals describing such as folded form, board-type, oscillating-type, slide type mobile terminal etc. exemplarily.Therefore, the present invention can be applied to any kind of mobile terminal, and is not limited to slide type mobile terminal.
Mobile terminal 100 as shown in Figure 1 may be constructed such that utilization operates via such as wired and wireless communication system and the satellite-based communication system of frame or packet transmission data.The communication system being wherein operable to according to the mobile terminal of the present invention is described referring now to Fig. 2.
Such communication system can use different air interfaces and/or physical layer.Such as, the air interface used by communication system includes such as frequency division multiple access (FDMA), time division multiple acess (TDMA), CDMA (CDMA) and UMTS (UMTS) (especially, Long Term Evolution (LTE)), global system for mobile communications (GSM) etc..As non-limiting example, as explained below relates to cdma communication system, but such instruction is equally applicable to other type of system.
With reference to Fig. 2, cdma wireless communication system can include multiple mobile terminal 100, multiple base station (BS) 270, base station controller (BSC) 275 and mobile switching centre (MSC) 280.MSC280 is configured to form interface with Public Switched Telephony Network (PSTN) 290.MSC280 is also structured to and the BSC275 formation interface that can be couple to base station 270 via back haul link.Back haul link can construct according to any one in some interfaces that oneself knows, described interface includes such as E1/T1, ATM, IP, PPP, frame relay, HDSL, ADSL or xDSL.It will be appreciated that system as shown in Figure 2 can include multiple BSC2750.
Each BS270 can service one or more subregion (or region), by each subregion of multidirectional antenna or the antenna covering pointing to specific direction radially away from BS270.Or, each subregion can be covered by two or more antennas for diversity reception.Each BS270 may be constructed such that support multiple frequencies distribution, and the distribution of each frequency has specific frequency spectrum (such as, 1.25MHz, 5MHz etc.).
Intersecting that subregion and frequency are distributed can be referred to as CDMA Channel.BS270 can also be referred to as base station transceiver subsystem (BTS) or other equivalent terms.In this case, term " base station " may be used for broadly representing single BSC275 and at least one BS270.Base station can also be referred to as " cellular station ".Or, each subregion of specific BS270 can be referred to as multiple cellular station.
As shown in Figure 2, broadcast singal is sent in system the mobile terminal 100 of operation by broadcsting transmitter (BT) 295.Broadcast reception module 111 as shown in Figure 1 is arranged on mobile terminal 100 and sentences the broadcast singal that reception is sent by BT295.In fig. 2 it is shown that several global positioning systems (GPS) satellite 300.Satellite 300 helps to position at least one in multiple mobile terminals 100.
In fig. 2, depict multiple satellite 300, it is understood that be, it is possible to use any number of satellite obtains useful location information.GPS module 115 as shown in Figure 1 is generally configured to coordinate the location information wanted with acquisition with satellite 300.Substitute GPS tracking technique or outside GPS tracking technique, it is possible to use other technology of the position of mobile terminal can be followed the tracks of.It addition, at least one gps satellite 300 can optionally or additionally process satellite dmb transmission.
As a typical operation of wireless communication system, BS270 receives the reverse link signal from various mobile terminals 100.Mobile terminal 100 generally participates in call, information receiving and transmitting communicates with other type of.Each reverse link signal that certain base station 270 receives is processed in specific BS270.The data obtained are forwarded to relevant BSC275.BSC provides call resource distribution and the mobile management function of the coordination of soft switching process included between BS270.The data received also are routed to MSC280 by BSC275, and it provides the extra route service for forming interface with PSTN290.Similarly, PSTN290 and MSC280 forms interface, and MSC and BSC275 forms interface, and BSC275 correspondingly controls BS270 so that forward link signals to be sent to mobile terminal 100.
Based on above-mentioned mobile terminal hardware configuration and communication system, the embodiment of the present invention is mainly used in the mobile terminal with picture pick-up device, and this mobile terminal can be smart mobile phone, intelligent watch, photographing unit, panel computer etc., but is not limited thereto.
The apparatus and method that the present embodiments relate to, it is intended to when solving to shoot under more dim environment in prior art, adopt LCD light filling poor effect, not easily color rendition, reduce the technical problem of the Experience Degree of user.
With specifically embodiment, technical scheme is described in detail below.These specific embodiments can be combined with each other below, is likely to repeat no more in some embodiment for same or analogous concept or process.
Fig. 3 is the structural representation of a kind of device embodiment one shooting light filling provided by the invention, as it is shown on figure 3, include: detection module 10, matching module 20 and supplementary lighting module 30.
Described detection module 10, triggers the condition of light filling when being set to detection shooting.
nullConcrete，Described detection module 10 can when user uses the mobile terminal with shoot function，Can select to open front-facing camera and trigger unlatching shooting order，Such as: smart mobile phone，When user clicks photographic head unlatching button，System default directly opens post-positioned pick-up head，When needs use front-facing camera it is，User triggers switching key，Namely system opens front-facing camera，Specifically can come according to practical situation，Can also user click photographic head open button time，System default directly opens front-facing camera，After photographic head is opened，Detection module 10 triggers the condition of light filling when can detect shooting，Whether this condition can receive the light filling operational order that user provides，So can carry out the operation of enforced opening light filling according to the demand of user，Or whether the light luminance under the current environment of the realtime image data of detection photographic head seizure is lower than predetermined threshold value，So can open light filling operation automatically according to the situation of current environment，Thus being user-friendly to，But it is not limited to this.
Described matching module 20, when being set to the condition being determined for compliance with triggering light filling, then the tristimulus values that the correlated color temperature under coupling current environment is corresponding.
nullConcrete，This matching module 20 can according to the situation of the condition triggering light filling when shooting being detected，When eligible，Namely the light filling operational order that user provides is received，Or when detecting the light luminance under the current environment of the realtime image data that photographic head catches lower than predetermined threshold value，Current environment time then to shooting carries out light filling，Such as: user is now arranged in the seashore at dusk，Dark，Can the shooting directly arranged under current environment need to carry out light filling，Directly initiate matching module 20，If be under afternoon sunlight，Bright and clear，The shooting that can arrange under current environment is made without light filling，Directly close matching module 20，During if in automatic catch，Can directly arrange and detect the light luminance under current environment according to detection module 10，When light luminance under current environment is lower than predetermined threshold value，Can trigger match module 20，This matching module 20 can mate the correlated color temperature (CorrelatedColorTemperature under current environment，It is called for short: CCT) corresponding trichroism (R/G/B) value，It is trichromatic red value respectively、Green value and blue valve，By mating the tristimulus values under current environment，Can so that the light luminance of shooting and the environment facies of surrounding be close，But it is not limited to this.
Described supplementary lighting module 30, is set to the tristimulus values after according to coupling and the light luminance under current environment is carried out light filling.
Concrete, trichroism (R/G/B) value after the coupling that this lookup module 30 obtains according to above-mentioned matching module 20, according to trichroism (R/G/B) value after coupling, the light luminance under current environment is carried out light filling, such as: under a yellow street lamp at night, if adopting white light to carry out light filling, now, white light is beaten on face, and background below is yellow, do according to yellow background if adopted, face can very seem partially blue, if according to face light filling, background again can be very yellow, and now by carrying out light filling according to trichroism (R/G/B) value after coupling, light filling photochromic according to the photochromic change of environment, accomplish as far as possible close with environment light, the color rendition degree of this type of scene can be optimized, improve user experience.
Embodiments provide a kind of device shooting light filling, including: detection module, matching module and supplementary lighting module, described detection module triggers the condition of light filling when being set to detection shooting, when described matching module is set to the condition being determined for compliance with triggering light filling, the tristimulus values that then correlated color temperature under coupling current environment is corresponding, described lookup module is set to the tristimulus values after according to coupling and the light luminance under current environment is carried out light filling, during by opening shooting, correlated color temperature according to current environment regulates corresponding tristimulus values and carries out light filling, so that effect is close with environment light after light filling, it is easy to color rendition, improve the Experience Degree of user.
Further, on the basis of above-described embodiment, when described matching module 20 is set to the condition being determined for compliance with triggering light filling, refer to:
Described matching module 20 be set to detect when receiving the operational order triggering light filling or detect under current environment light luminance lower than predetermined threshold value time meet the condition triggering light filling.
Concrete, when matching module 20 is determined for compliance with the condition triggering light filling, when namely receiving the light filling operational order that user provides, so can carry out the operation of enforced opening light filling according to the demand of user, or whether the light luminance under the current environment of the realtime image data of detection photographic head seizure is lower than predetermined threshold value, so can open light filling operation automatically according to the situation of current environment, thus user-friendly, improve the Experience Degree of user.
Further, Fig. 4 is the structural representation of a kind of device embodiment two shooting light filling provided by the invention, and as shown in Figure 4, on the basis of above-described embodiment, this device also includes: build table module 40；
Described build tristimulus values corresponding to correlated color temperature that table module 40 is set under coupling current environment before, measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
Concrete, described table module 40 of building can measure the tristimulus values that the correlated color temperature under conventional scene is corresponding in advance, such as: the tristimulus values corresponding to from correlated color temperature 2000 to correlated color temperature 5000 are all recorded, tristimulus values one group corresponding can be measured every 500, the concrete sampling interval can determine according to practical situation, set up correlated color temperature and tristimulus values relation table one to one, in general the sampling interval is more intensive, follow-up more accurate matchingly with this relation table, the application scenarios that can cover is also more many, but is not limited to this.
By described table module 40 of building is obtained, according to conventional application scenarios, the tristimulus values that each frame data correlated color temperature of each environment hypograph is corresponding, and set up described correlated color temperature and tristimulus values relation table one to one, the corresponding tristimulus values of required light filling during shooting are accurately matched consequently facilitating follow-up, complete color rendition as early as possible, improve the satisfaction of user.
Further, as shown in Figure 4, on the basis of above-described embodiment, this device also includes: cache module 50；
Described cache module 50 is set to obtain in real time each frame data of current image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity.
Concrete, this cache module 50 is set to when starting shooting, this cache module will obtain each frame data of present image in real time, and the correlated color temperature of the acquired frame data of buffer memory predetermined quantity, such as: this cache module can store the frame data of 30 frames, when getting each frame data of image, the correlated color temperature of current environment can be calculated according to certain algorithm, but the correlated color temperature of the frame data of 30 nearest preservations of cache module buffer memory, specifically can determine according to practical situation, but be not limited to this.
Each frame data of present image are obtained in real time, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity, it is simple to understanding the correlated color temperature of shooting current environment, the correlated color temperature for subsequent match current environment is provided convenience by cache module 50.
Further, on the basis of above-described embodiment, when described matching module 20 is set to the condition being determined for compliance with triggering light filling, then mates corresponding tristimulus values according to the correlated color temperature under current environment, refer to:
When described matching module 20 is set to the condition being determined for compliance with triggering light filling, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
Concrete, when described matching module 20 is determined for compliance with the condition triggering light filling, the then correlated color temperature according to the last frame data after current cache, select to conform to a predetermined condition the correlated color temperature of colour frame data from all frame data after buffer memory, such as: the correlated color temperature of last frame data is 2500, all frame data after buffer memory then select the correlated color temperature of the frame data close with 2500, such as: 2400, 2550, 2600, 2450 etc. the correlated color temperatures meeting predetermined difference, these correlated color temperatures are averaged together with the correlated color temperature of last frame, namely meansigma methods is 2500, by the meansigma methods of this correlated color temperature and the tristimulus values corresponding with above-mentioned relation table according to predetermined matched rule coupling, but it is not limited to this.
When being determined for compliance with, by described matching module 20, the condition triggering light filling, the then correlated color temperature according to the last frame data after current cache, the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data is selected to average from all frame data after buffer memory, correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule, the tristimulus values of light filling are carried out according to current environment required for can matching more truly, so that effect is close with environment light after light filling, it is easy to color rendition, improve the Experience Degree of user.
Further, on the basis of above-described embodiment, described predetermined matched rule includes:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding；
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding；
If the correlated color temperature after averaging is equal to the correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, correlated color temperature is corresponding；
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
Concrete, described predetermined matched rule gives the correlated color temperature after averaging in current environment and carrys out concrete operation method when mating with relation table, from regardless of whether correlated color temperature current environment is either with or without the tristimulus values that can match correspondence in relation table, but it is not limited to this.
Carry out the tristimulus values of light filling required for being matched by these matched rules, so that effect is close with environment light after light filling, it is simple to color rendition, but be not limited to this.
It should be noted that, in device provided by the invention, detection module 10 can be arranged in sensing unit 140 or photographing unit 121, matching module 20 can arrange in controller 180 in FIG, supplementary lighting module 30 can be arranged in output unit 150, builds table module 40, cache module 50 can be arranged in memorizer 160.
Fig. 5 is the schematic flow sheet of a kind of embodiment of the method one shooting light filling provided by the invention, as it is shown in figure 5, the method includes:
The condition of light filling is triggered when S101, detection shooting.
Concrete, can when user uses the mobile terminal with shoot function, can select to open front-facing camera and trigger unlatching shooting order, such as: smart mobile phone, when user clicks photographic head unlatching button, system default directly opens post-positioned pick-up head, when needs use front-facing camera it is, user triggers switching key, namely system opens front-facing camera, specifically can come according to practical situation, can also user click photographic head open button time, system default directly opens front-facing camera, after photographic head is opened, the light luminance of the current environment of the realtime image data that photographic head catches can be detected, consequently facilitating the light luminance of follow-up judgement current environment is the need of light filling, but it is not limited to this.
S102, when being determined for compliance with the condition triggering light filling, then tristimulus values corresponding to correlated color temperature under coupling current environment.
nullConcrete，According to the selection of user, shooting can be carried out light filling，Such as: user is now arranged in the seashore at dusk，Dark，Can the shooting directly arranged under current environment need to carry out light filling，Directly open coupling，If be under afternoon sunlight，Bright and clear，The shooting that can arrange under current environment is made without light filling，Directly close coupling，During if in automatic catch，Situation according to the light luminance under detection current environment can be directly set，When light luminance under current environment is lower than predetermined threshold value，Coupling can be started，Correlated color temperature (the CorrelatedColorTemperature under current environment can be mated，It is called for short: CCT) corresponding trichroism (R/G/B) value，It is trichromatic red value respectively、Green value and blue valve，By mating the tristimulus values under current environment，Can so that the light luminance of shooting and the environment facies of surrounding be close，But it is not limited to this.
S103, according to coupling after tristimulus values the light luminance under current environment is carried out light filling.
Concrete, according to trichroism (R/G/B) value after coupling, the light luminance under current environment is carried out light filling, such as: under a yellow street lamp at night, if adopting white light to carry out light filling, now, white light is beaten on face, and background below is yellow, do according to yellow background if adopted, face can very seem partially blue, if according to face light filling, background again can be very yellow, and now by carrying out light filling according to trichroism (R/G/B) value after coupling, light filling photochromic according to the photochromic change of environment, accomplish as far as possible close with environment light, the color rendition degree of this type of scene can be optimized, improve user experience.
Embodiments provide a kind of method shooting light filling, including: trigger the condition of light filling during detection shooting, when being determined for compliance with the condition triggering light filling, the tristimulus values that then correlated color temperature under coupling current environment is corresponding, according to the tristimulus values after coupling, the light luminance under current environment is carried out light filling, during by opening shooting, correlated color temperature according to current environment regulates corresponding tristimulus values and carries out light filling, so that effect is close with environment light after light filling, it is easy to color rendition, improves the Experience Degree of user.
Further, on the basis of above-described embodiment, it is determined that when meeting the condition triggering light filling, including:
Described matching module be set to detect when receiving the operational order triggering light filling or detect under current environment light luminance lower than predetermined threshold value time meet the condition triggering light filling.
Concrete, when being determined for compliance with the condition triggering light filling, can be that detection is when receiving the light filling operational order that user provides, so can carry out the operation of enforced opening light filling according to the demand of user, or whether the light luminance under the current environment of the realtime image data of detection photographic head seizure is lower than predetermined threshold value, so can open light filling operation automatically according to the situation of current environment, thus user-friendly, improve the Experience Degree of user.
Further, on the basis of above-described embodiment, before mating the tristimulus values that the correlated color temperature under current environment is corresponding, also include:
Measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
Concrete, the tristimulus values that the correlated color temperature under conventional scene is corresponding can be measured in advance, such as: the tristimulus values corresponding to from correlated color temperature 2000 to correlated color temperature 5000 are all recorded, tristimulus values one group corresponding can be measured every 500, the concrete sampling interval can determine according to practical situation, set up correlated color temperature and tristimulus values relation table one to one, in general the sampling interval is more intensive, follow-up more accurate matchingly with this relation table, the application scenarios that can cover is also more many, but is not limited to this.
By the tristimulus values that each frame data correlated color temperature according to the conventional application scenarios each environment hypograph of acquisition is corresponding, and set up described correlated color temperature and tristimulus values relation table one to one, the corresponding tristimulus values of required light filling during shooting are accurately matched consequently facilitating follow-up, complete color rendition as early as possible, improve the satisfaction of user.
Further, on the basis of above-described embodiment, after the light luminance under detection current environment, also include:
Obtain each frame data of present image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity.
Concrete, when starting shooting, this cache module will obtain each frame data of present image in real time, and the correlated color temperature of the acquired frame data of buffer memory predetermined quantity, for instance: this cache module can store the frame data of 30 frames, when getting each frame data of image, the correlated color temperature of current environment can be calculated according to certain algorithm, but the correlated color temperature of the frame data of 30 nearest preservations of cache module buffer memory, specifically can determine according to practical situation, but be not limited to this.
By obtaining each frame data of present image in real time, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity, it is simple to understanding the correlated color temperature of shooting current environment, the correlated color temperature for subsequent match current environment is provided convenience.
Further, on the basis of above-described embodiment, when the light luminance under current environment is lower than predetermined threshold value, then mate corresponding tristimulus values according to the correlated color temperature under current environment, including:
When light luminance under current environment is lower than predetermined threshold value, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
Concrete, when being determined for compliance with the condition triggering light filling, the then correlated color temperature according to the last frame data after current cache, select to conform to a predetermined condition the correlated color temperature of colour frame data from all frame data after buffer memory, such as: the correlated color temperature of last frame data is 2500, all frame data after buffer memory then select the correlated color temperature of the frame data close with 2500, such as: 2400, 2550, 2600, 2450 etc. the correlated color temperatures meeting predetermined difference, these correlated color temperatures are averaged together with the correlated color temperature of last frame, namely meansigma methods is 2500, by the meansigma methods of this correlated color temperature and the tristimulus values corresponding with above-mentioned relation table according to predetermined matched rule coupling, but it is not limited to this.
When being determined by meeting the condition triggering light filling, the then correlated color temperature according to the last frame data after current cache, the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data is selected to average from all frame data after buffer memory, correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule, the tristimulus values of light filling are carried out according to current environment required for can matching more truly, so that effect is close with environment light after light filling, it is easy to color rendition, improve the Experience Degree of user.
Further, on the basis of above-described embodiment, described predetermined matched rule includes:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding.
Further, on the basis of above-described embodiment, described predetermined matched rule includes:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
Further, on the basis of above-described embodiment, described predetermined matched rule includes:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
Further, on the basis of above-described embodiment, described predetermined matched rule includes:
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
Described predetermined matched rule gives the correlated color temperature after averaging in current environment and carrys out concrete operation method when mating with relation table, from regardless of whether correlated color temperature current environment is either with or without the tristimulus values that can match correspondence in relation table, but it is not limited to this.
Carry out the tristimulus values of light filling required for being matched by these matched rules, so that effect is close with environment light after light filling, it is simple to color rendition, but be not limited to this.
It should be noted that, in this article, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or device not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or device.When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of this key element, method, article or device.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art is it can be understood that can add the mode of required general hardware platform by software to above-described embodiment method and realize, hardware can certainly be passed through, but in a lot of situation, the former is embodiment more preferably.Based on such understanding, the part that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions with so that a station terminal equipment (can be mobile phone, computer, server, air-conditioner, or the network equipment etc.) perform the method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (18)
1. the device shooting light filling, it is characterised in that including: detection module, matching module and supplementary lighting module；
Described detection module, triggers the condition of light filling when being set to detection shooting；
Described matching module, when being set to the condition being determined for compliance with triggering light filling, then the tristimulus values that the correlated color temperature under coupling current environment is corresponding；
Described supplementary lighting module, is set to the tristimulus values after according to coupling and the light luminance under current environment is carried out light filling.
2. device according to claim 1, it is characterised in that when described matching module is set to the condition being determined for compliance with triggering light filling, refer to:
Described matching module be set to detect when receiving the operational order triggering light filling or detect under current environment light luminance lower than predetermined threshold value time meet the condition triggering light filling.
3. device according to claim 2, it is characterised in that also include: build table module；
Described build tristimulus values corresponding to correlated color temperature that table module is set under coupling current environment before, measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
4. device according to claim 1, it is characterised in that also include: cache module；
Described cache module is set to obtain each frame data of current image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity.
5. device according to claim 3, it is characterised in that when described matching module is set to the condition being determined for compliance with triggering light filling, then mate corresponding tristimulus values according to the correlated color temperature under current environment, refer to:
When described matching module is set to the condition being determined for compliance with triggering light filling, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
6. device according to claim 5, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding.
7. device according to claim 5, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
8. device according to claim 5, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is equal to the correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, correlated color temperature is corresponding.
9. device according to claim 5, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
10. the method shooting light filling, it is characterised in that including:
The condition of light filling is triggered during detection shooting；
When being determined for compliance with the condition triggering light filling, then the tristimulus values that the correlated color temperature under coupling current environment is corresponding；
According to the tristimulus values after coupling, the light luminance under current environment is carried out light filling.
11. method according to claim 1, it is characterised in that be determined for compliance with triggering the condition of light filling, including:
The condition triggering light filling is met when the light luminance detected when receiving the operational order triggering light filling or detect under current environment is lower than predetermined threshold value.
12. method according to claim 11, it is characterised in that before mating the tristimulus values that the correlated color temperature under current environment is corresponding, also include:
Measure the tristimulus values that each frame data correlated color temperature of image is corresponding, and set up described correlated color temperature and described tristimulus values relation table one to one.
13. method according to claim 10, it is characterised in that after the light luminance under detection current environment, also include:
Obtain each frame data of present image, the correlated color temperature of the acquired frame data of buffer memory predetermined quantity in real time.
14. method according to claim 12, it is characterised in that when the light luminance under current environment is lower than predetermined threshold value, then mate corresponding tristimulus values according to the correlated color temperature under current environment, including:
When light luminance under current environment is lower than predetermined threshold value, the then correlated color temperature according to the last frame data after current cache, select the correlated color temperature of the frame data conformed to a predetermined condition and the correlated color temperature of described last frame data to average from all frame data after buffer memory, the correlated color temperature after averaging is mated corresponding tristimulus values according to predetermined matched rule.
15. method according to claim 14, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is more than the maximum of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the maximum of correlated color temperature is corresponding.
16. method according to claim 14, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is less than the minima of correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, the minima of correlated color temperature is corresponding.
17. method according to claim 14, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is equal to the correlated color temperature in described relation table, then mate the tristimulus values that in described relation table, correlated color temperature is corresponding.
18. method according to claim 14, it is characterised in that described predetermined matched rule, including:
If the correlated color temperature after averaging is in described relation table between the first correlated color temperature and the second correlated color temperature, then obtain corresponding tristimulus values according to equation below:
R=Ra+ (Rb Ra) * (CCT CCTa)/(CCTb CCTa)
G=Ga+ (Gb Ga) * (CCT CCTa)/(CCTb CCTa)
B=Ba+ (Bb Ba) * (CCT CCTa)/(CCTb CCTa)
Wherein: R is the red value that the correlated color temperature after averaging needs coupling, G is the green value that the correlated color temperature after averaging needs coupling, B needs the blue valve of coupling for the correlated color temperature after averaging, CCT is the correlated color temperature after averaging, Ra is the red value that the first correlated color temperature is corresponding, and Ga is the green value that the first correlated color temperature is corresponding, and Ba is the blue valve that the first correlated color temperature is corresponding, CCTa is the first correlated color temperature, and CCTb is the second correlated color temperature.
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| CN201610283520.7A CN105791711A (en) | 2016-04-29 | 2016-04-29 | Shooting light supplement apparatus and method thereof |
| PCT/CN2017/074758 WO2017185870A1 (en) | 2016-04-29 | 2017-02-24 | Light supplement apparatus and method for photographing, and storage medium |
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| CN111726542A (en) * | 2020-06-12 | 2020-09-29 | Oppo广东移动通信有限公司 | Camera light supplementing method, terminal and storage medium |
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