WO2017185783A1

WO2017185783A1 - Mobile terminal, exposure method therefor, and computer storage medium

Info

Publication number: WO2017185783A1
Application number: PCT/CN2016/112482
Authority: WO
Inventors: 谢书勋
Original assignee: 努比亚技术有限公司
Priority date: 2016-04-28
Filing date: 2016-12-27
Publication date: 2017-11-02
Also published as: CN105898153A

Abstract

Disclosed are a mobile terminal and an exposure method therefor. The mobile terminal comprises: a CMOS image sensor unit and multiple electronic black cards. The electronic black cards are arranged at a light incidence side of the CMOS image sensor. The electronic black cards are in a transparent state when powered off. The electronic black cards are in a non-transparent state when powered on. The mobile terminal also comprises a detection unit and a control unit, where the detection unit is configured to detect a preview image captured by the CMOS image sensor unit and to identify a first display parameter of a first area in the preview image, the first area being any area in the preview image, and the control unit is configured to control the powering on of a first electronic black card corresponding to the first area on the basis of the first display parameter acquired by the detection unit. Embodiments of the present invention implement brightness adjustment of a local area in an image and solve the problem in the prior art of uneven local exposure.

Description

Mobile terminal and exposure method thereof, computer storage medium

Technical field

The present invention relates to the field of photographing technology, and in particular, to a mobile terminal, an exposure method thereof, and a computer storage medium.

Background technique

Many existing mobile terminals (such as mobile phones) use a CMOS (Complementary Metal-Oxide Semiconductor) image sensor as a lens, in order to avoid high-speed motion in the rolling shutter exposure mode (pixel point progressive exposure) The object has a jelly effect, and the global shutter exposure mode (all pixels are simultaneously exposed) is often used. However, most of the current CMOS image sensors require a period of time to read out after exposure with the global shutter due to design limitations. Exposure data. 1 is a schematic diagram of a control process of global exposure of a mechanical shutter in the prior art; as shown in FIG. 1 , the period from T2 to T3 is a process of reading data line by line, and during this data reading, the CMOS image sensor cannot be made. It is in the exposure state, so it is necessary to add a mechanical shutter to keep the mechanical shutter closed during the data reading period, block the light, and keep the CMOS image sensor in the state of no light, thus ensuring that all the lines of the entire CMOS image sensor are obtained. The same amount of exposure avoids uneven exposure.

Due to the mechanical structure, the mechanical shutter wears out during the opening and closing process. Due to this wear, the mechanical shutter has a limitation on the service life. For example, the mechanical shutter of a SLR camera usually has a service life of 150 to 200,000 times. In addition, the mechanical shutter is controlled by the solenoid valve to close the mechanical blade. It takes a period of time from power-on to the solenoid valve to close the blade completely. Therefore, when processing the mechanical shutter closing action, it is necessary to calculate the advance amount to operate, as shown in Fig. 1. As shown, the mechanical shutter takes a period of time from power-on (T1 time) to full-off (T2 time), as shown in Figure 1. In the CMOS global shutter exposure mode, the preset exposure time is reached (T1 to After T2, the mechanical shutter must be completely turned off before the first line starts reading data (before T2), that is, when starting to read data line by line, it is necessary to ensure that the CMOS image sensor is not in the light state, if the mechanical shutter is in After the T2 time is turned off, there is no guarantee that the exposure time of each line of the CMOS image sensor is uniform, resulting in uneven local exposure.

Summary of the invention

In order to solve the existing technical problems, the embodiments of the present invention provide a mobile terminal, an exposure method thereof, and a computer storage medium, which can solve the problem of uneven local exposure in the prior art and improve the shooting experience of the user.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a mobile terminal, where the mobile terminal includes: a CMOS image sensing unit and a plurality of electronic black cards; and the plurality of electronic black card combinations correspond to an image area of the CMOS image sensing unit; The electronic black card is disposed on a light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power-off state; and the electronic black card is in a non-transmissive state in a power-on state;

The mobile terminal further includes a detecting unit and a control unit; wherein

The detecting unit is configured to detect a preview image acquired by the CMOS image sensing unit, and identify a first display parameter of the first region in the preview image; the first region is any one of the preview images region;

The control unit is configured to control the first electronic black card corresponding to the first area to be powered on based on the first display parameter obtained by the detecting unit.

In an embodiment, the control unit is configured to control the first electronic black card corresponding to the first area to be powered on when the first display parameter of the first area is higher than the first threshold.

In an embodiment, the detecting unit is configured to identify a first display parameter of the first area in the preview image; determine, according to the first display parameter, the first area as a foreground area, and determine a Other areas other than the first area are background areas;

The control unit is configured to control the first electronic black card corresponding to the first area to be powered on based on the first display parameter, or to control an electronic black card corresponding to another area other than the first area to be powered on.

In an embodiment, the currents loaded on the electronic black card are different in light transmittance corresponding to the electronic black card.

In an embodiment, the control unit is further configured to: when the first electronic black card corresponding to the first area is powered on, based on the first display parameter of the first area and except the first area Display parameters of other areas, adaptively adjusting a power-on current of the first electronic black card; wherein the first electronic black card is any one of the plurality of electronic black cards.

In an embodiment, the control module is further configured to control the plurality of electronic black cards to be powered on when receiving a shutter close command; or to control the plurality of electronic blacks when receiving a shutter open command The card is powered down.

In an embodiment, the electronic black card is disposed on a surface of the CMOS image sensing unit on the light incident side, or is fixed to the light incident side of the CMOS image sensing unit, or is disposed on the CMOS image transmission. The interior of the sense unit.

In an embodiment, the control unit is configured to control, when the first display parameter is higher than the second threshold, to power on the first electronic black card corresponding to the first area, so that the first display The parameter is not higher than the second threshold.

In an embodiment, the control unit is configured to control an electronic black card corresponding to another area other than the first area to be powered on when the first display parameter is lower than a third threshold.

In an embodiment, the control unit is further configured to: obtain a state of the electronic black card when detecting a photographing instruction; and control the electronic black card switching when the state of the electronic black card is a powered state To a power down state to cause the CMOS image sensing unit to perform global exposure.

An embodiment of the present invention further provides an exposure method, which is applied to a mobile terminal; the mobile terminal includes a CMOS image sensing unit and a plurality of electronic black cards; and the plurality of electronic black card combinations correspond to the CMOS image transmission An image area of the sensing unit; the electronic black card is disposed in the a light-input side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power-down state; the electronic black card is in a non-transmissive state in a power-on state; the method includes:

Detecting a preview image acquired by the CMOS image sensing unit, and identifying a first display parameter of the first region in the preview image; the first region being any region in the preview image;

Controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on.

In an embodiment, the controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on, includes: when a first display parameter of the first area is higher than a first threshold And controlling the first electronic black card corresponding to the first area to be powered on.

In an embodiment, the controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on includes: identifying a first display parameter of the first area in the preview image; The first display parameter determines that the first area is a foreground area, and determines that other areas than the first area are background areas;

Controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on; or controlling the electronic black card corresponding to the other area except the first area to be powered on.

In an embodiment, after the first electronic black card corresponding to the first area is powered on, the method further includes: based on the first display parameter of the first area and except the first area Display parameters of other areas, adaptively adjusting a power-on current of the first electronic black card; wherein the first electronic black card is any one of the plurality of electronic black cards.

In an embodiment, the method further includes: controlling the plurality of electronic black cards to be powered on when receiving a shutter close instruction; or controlling the plurality of electronic black cards when receiving a shutter open command Electricity.

In an embodiment, the controlling the first electronic black card corresponding to the first area to be powered based on the first display parameter comprises:

Controlling the first area corresponding to the first area when the first display parameter is higher than the second threshold The electronic black card is powered up such that the first display parameter is not higher than the second threshold.

In an embodiment, the controlling the electronic black card corresponding to the other areas except the first area is powered on, including:

When the first display parameter is lower than the third threshold, the electronic black card corresponding to the other areas other than the first area is controlled to be powered on.

In an embodiment, the method further includes:

When the photographing instruction is detected, obtaining the state of the electronic black card; when the state of the electronic black card is the power-on state, controlling the electronic black card to switch to the power-down state, so that the CMOS image sensing unit Make a global exposure.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to perform the exposure method according to the embodiment of the invention.

The mobile terminal provided by the embodiment of the present invention, the exposure method thereof, and the computer storage medium, the mobile terminal includes: a CMOS image sensing unit and a plurality of electronic black cards; the plurality of electronic black card combinations corresponding to the CMOS image transmission An image area of the sensing unit; the electronic black card is disposed on a light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power down state; and the electronic black card is in a power-on state a non-transmissive state; the mobile terminal further includes a detecting unit and a control unit; wherein the detecting unit is configured to detect a preview image acquired by the CMOS image sensing unit, and identify a first region in the preview image a first display parameter; the first area is any one of the preview images; the control unit is configured to control a first electronic corresponding to the first area based on a first display parameter obtained by the detecting unit The black card is powered on. Thus, according to the technical solution of the embodiment of the present invention, the corresponding electronic black card (ie, the first electronic black card) is powered on based on the display parameters of the local area (ie, the first area), thereby blocking the entry into the CMOS image transmission. The light corresponding to the local area in the sensing unit realizes the brightness adjustment of the local area in the image, solves the problem of uneven local exposure in the prior art, and avoids the picture quality caused by the overexposure of the local area in the image. Good question, improve the user's Shooting experience.

DRAWINGS

1 is a schematic diagram of a control process of a global exposure of a mechanical shutter in the prior art;

2 is a schematic structural diagram of an optional mobile terminal that implements various embodiments of the present invention;

3 is a schematic diagram of a wireless communication system of the mobile terminal shown in FIG. 2;

Figure 4 is a block diagram showing the electrical structure of the camera of Figure 2;

FIG. 5 is a schematic diagram of connection of functional modules of a mobile terminal for implementing an exposure method according to an embodiment of the present invention; FIG.

6 is a schematic diagram of an electronic black card in a mobile terminal according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart of an exposure method according to an embodiment of the present invention; FIG.

8 is another schematic flow chart of an exposure method according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a test control apparatus as a hardware entity according to an embodiment of the present invention; FIG.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A mobile terminal embodying various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, the use of suffixes such as "module", "component" or "unit" for indicating an element is merely an explanation for facilitating the present invention, and does not have a specific meaning per se. Therefore, "module" and "component" can be used in combination.

The mobile terminal can be implemented in various forms. For example, the terminal described in the present invention may include, for example, a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet), a PMP (Portable Multimedia Player), a navigation device, etc. of Mobile terminals and fixed terminals such as digital TVs, desktop computers, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, those skilled in the art will appreciate that configurations in accordance with embodiments of the present invention can be applied to fixed type terminals in addition to components that are specifically for mobile purposes.

FIG. 2 is a schematic diagram showing the hardware structure of an optional mobile terminal embodying various embodiments of the present invention.

The mobile terminal 100 may include a wireless communication unit 110, an A/V (audio/video) input unit 120, a user input unit 130, an ultrasonic device 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, a power supply unit 190, and the like. Wait. Figure 2 illustrates a mobile terminal having various components, but it should be understood that not all illustrated components are required to be implemented. More or fewer components can be implemented instead. The elements of the mobile terminal will be described in detail below.

Wireless communication unit 110 typically includes one or more components that permit radio communication between mobile terminal 100 and a wireless communication device or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111 and a mobile communication module 112.

The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel can include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to the terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Moreover, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of Digital Multimedia Broadcasting (DMB) Electronic Program Guide (EPG), Digital Video Broadcasting Handheld (DVB-H) Electronic Service Guide (ESG), and the like. . The broadcast receiving module 111 can receive a signal broadcast by using various types of broadcast apparatuses. In particular, the broadcast receiving module 111 can use forward link media (MediaFLO) by using, for example, multimedia broadcast-terrestrial (DMB-T), digital multimedia broadcast-satellite (DMB-S), digital video broadcast-handheld (DVB-H) Number of digital broadcast devices received by @) data broadcasting device, terrestrial digital broadcasting integrated service (ISDB-T), etc. Word broadcast. The broadcast receiving module 111 can be constructed as various broadcast apparatuses suitable for providing broadcast signals as well as the above-described digital broadcast apparatuses. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).

The mobile communication module 112 transmits the radio signals to and/or receives radio signals from at least one of a base station (e.g., an access point, a Node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received in accordance with text and/or multimedia messages.

The A/V input unit 120 is for receiving an audio or video signal. The A/V input unit 120 may include a camera 121 and a microphone 122 that processes image data of a still image or video obtained by an image capturing device in a video capturing mode or an image capturing mode. The processed image frame can be displayed on the display unit 151. The image frames processed by the camera 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 121 may be provided according to the configuration of the mobile terminal. The microphone 122 can receive sound (audio data) via a microphone in an operation mode of a telephone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound as audio data. The processed audio (voice) data can be converted to a format output that can be transmitted to the mobile communication base station via the mobile communication module 112 in the case of a telephone call mode. The microphone 122 can implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated during the process of receiving and transmitting audio signals.

The user input unit 130 may generate key input data according to a command input by the user to control various operations of the mobile terminal. The user input unit 130 allows the user to input various types of information, and may include a keyboard, a pot, a touch pad (eg, a touch sensitive component that detects changes in resistance, pressure, capacitance, etc. due to contact), a scroll wheel , rocker, etc. In particular, when the touch panel is superimposed on the display unit 151 in the form of a layer, a touch screen can be formed.

The electronic black card 140 is disposed on the light incident side of the CMOS sensor in the camera, and the electronic black card is in a transparent state when the power is off, so that the light can enter the CMOS image sensor, and is in a non-transparent state at the time of power-on, blocking the entry into the CMOS image sensor. Light, then globally on the mobile terminal During the exposure, only the electronic black card needs to be powered down, and the electronic black card is powered on at the end of the exposure to read the pixel data after the exposure, and the electronic black card can be realized by the liquid crystal panel or the transparent electronic film.

Output unit 150 is configured to provide an output signal (eg, an audio signal, a video signal, an alarm signal, a vibration signal, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, and the like.

The display unit 151 can display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 can display a user interface (UI) or a graphical user interface (GUI) related to a call or other communication (eg, text messaging, multimedia file download, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or image and related functions, and the like.

Meanwhile, when the display unit 151 and the touch panel are superposed on each other in the form of a layer to form a touch screen, the display unit 151 can function as an input device and an output device. The display unit 151 may include at least one of a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), an organic light emitting diode (OLED) display, a flexible display, a three-dimensional (three-dimensional) display, and the like. Some of these displays may be configured to be transparent to allow a user to view from the outside, which may be referred to as a transparent display, and a typical transparent display may be, for example, a TOLED (Transparent Organic Light Emitting Diode) display or the like. According to a particular desired embodiment, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown) . The touch screen can be used to detect touch input pressure as well as touch input position and touch input area.

The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 when the mobile terminal is in a call signal receiving mode, a call mode, a recording mode, a voice recognition mode, a broadcast receiving mode, and the like. The audio signal is output as sound. Moreover, the audio output module 152 can provide a specific function performed by the mobile terminal 100. Off audio output (eg, call signal reception sound, message reception sound, etc.). The audio output module 152 can include a pickup, a buzzer, and the like.

The memory 160 may store a software program or the like that performs processing and control operations performed by the controller 180, or may temporarily store data (for example, a phone book, a message, a still image, a video, and the like) that has been output or is to be output. Moreover, the memory 160 can store data regarding vibrations and audio signals of various manners that are output when a touch is applied to the touch screen.

The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (eg, SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM). , read only memory (ROM), electrically erasable programmable read only memory (EEPROM), programmable read only memory (PROM), magnetic memory, magnetic disk, optical disk, and the like. Moreover, the mobile terminal 100 can cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.

The interface unit 170 serves as an interface through which at least one external device can connect with the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, and an audio input/output. (I/O) port, video I/O port, headphone port, and more. The identification module may be stored to verify various information used by the user using the mobile terminal 100 and may include a User Identification Module (UIM), a Customer Identification Module (SIM), a Universal Customer Identity Module (USIM), and the like. In addition, the device having the identification module (hereinafter referred to as "identification device") may take the form of a smart card, and thus the identification device may be connected to the mobile terminal 100 via a port or other connection device. The interface unit 170 can be configured to receive input from an external device (eg, data information, power, etc.) and transmit the received input to one or more components within the mobile terminal 100 or can be used at the mobile terminal and external device Transfer data between.

In addition, when the mobile terminal 100 is connected to the external base, the interface unit 170 may function as a path through which power is supplied from the base to the mobile terminal 100 or may be used as a transmission of various command signals allowing input from the base to the mobile terminal 100 The path to the terminal. Various types of input from the base The command signal or power can be used as a signal for identifying whether the mobile terminal is accurately mounted on the base.

The controller 180 typically controls the overall operation of the mobile terminal. For example, the controller 180 performs the control and processing associated with voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, which may be constructed within the controller 180 or may be configured to be separate from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or an image drawing input performed on the touch screen as a character or an image.

The power supply unit 190 receives external power or internal power under the control of the controller 180 and provides appropriate power required to operate the various components and components.

The various embodiments described herein can be implemented in a computer readable medium using, for example, computer software, hardware, or any combination thereof. For hardware implementations, the embodiments described herein may be through the use of application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays ( An FPGA, a processor, a controller, a microcontroller, a microprocessor, at least one of the electronic units designed to perform the functions described herein, in some cases, such an embodiment may be at the controller 180 Implemented in the middle. For software implementations, implementations such as procedures or functions may be implemented with separate software modules that permit the execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any suitable programming language, which can be stored in memory 160 and executed by controller 180.

So far, the mobile terminal has been described in terms of its function. Hereinafter, for the sake of brevity, a slide type mobile terminal among various types of mobile terminals such as a folding type, a bar type, a swing type, a slide type mobile terminal, and the like will be described as an example. Therefore, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.

The mobile terminal 100 as shown in FIG. 2 may be configured to operate using a communication system such as a wired and wireless communication system and a satellite-based communication system that transmits data via frames or packets.

A communication system in which a mobile terminal according to the present invention can be operated will now be described with reference to FIG.

Such communication systems may use different air interfaces and/or physical layers. For example, air interfaces used by communication systems include, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)). ), Global System for Mobile Communications (GSM), etc. As a non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.

Referring to FIG. 3, a CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of base stations (BS) 270, a base station controller (BSC) 275, and a mobile switching center (MSC) 280. The MSC 280 is configured to interface with a public switched telephone network (PSTN) 290. The MSC 280 is also configured to interface with a BSC 275 that can be coupled to the base station 270 via a backhaul line. The backhaul line can be constructed in accordance with any of a number of known interfaces including, for example, E1/T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. It will be appreciated that the system as shown in FIG. 3 can include multiple BSCs 275.

Each BS 270 can serve one or more partitions (or regions), each of which is covered by a multi-directional antenna or an antenna directed to a particular direction radially away from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS 270 can be configured to support multiple frequency allocations, and each frequency allocation has a particular frequency spectrum (eg, 1.25 MHz, 5 MHz, etc.).

The intersection of partitioning and frequency allocation can be referred to as a CDMA channel. BS 270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" can be used to generally refer to a single BSC 275 and at least one BS 270. A base station can also be referred to as a "cell station." Alternatively, each partition of a particular BS 270 may be referred to as a plurality of cellular stations.

As shown in FIG. 3, a broadcast transmitter (BT) 295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in FIG. 3 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In Figure 3, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 helps locate at least one of the plurality of mobile terminals 100.

In Figure 3, a plurality of satellites 300 are depicted, but it is understood that any number of The satellite gets useful positioning information. The GPS module 115 as shown in Figure 3 is typically configured to cooperate with the satellite 300 to obtain desired positioning information. Instead of GPS tracking technology or in addition to GPS tracking technology, other techniques that can track the location of the mobile terminal can be used. Additionally, at least one GPS satellite 300 can selectively or additionally process satellite DMB transmissions.

As a typical operation of a wireless communication system, BS 270 receives reverse link signals from various mobile terminals 100. Mobile terminal 100 typically participates in calls, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within a particular BS 270. The obtained data is forwarded to the relevant BSC 275. The BSC provides call resource allocation and coordinated mobility management functions including a soft handoff procedure between the BSs 270. The BSC 275 also routes the received data to the MSC 280, which provides additional routing services for interfacing with the PSTN 290. Similarly, PSTN 290 interfaces with MSC 280, which forms an interface with BSC 275, and BSC 275 controls BS 270 accordingly to transmit forward link signals to mobile terminal 100.

Referring to FIG. 4, FIG. 4 is a block diagram showing the electrical structure of the camera of FIG. 2.

The photographic lens 1211 is composed of a plurality of optical lenses for forming a subject image, and is a single focus lens or a zoom lens. The photographic lens 1211 is movable in the optical axis direction under the control of the lens driver 1221, and the lens driver 1221 controls the focus position of the photographic lens 1211 in accordance with a control signal from the lens driving control circuit 1222, and can also be controlled in the case of the zoom lens. Focus distance. The lens drive control circuit 1222 performs drive control of the lens driver 1221 in accordance with a control command from the microcomputer 1217.

An imaging element 1212 is disposed on the optical axis of the photographic lens 1211 near the position of the subject image formed by the photographic lens 1211. The imaging element 1212 is for capturing an image of a subject and acquiring captured image data. Photodiodes constituting each pixel are arranged two-dimensionally and in a matrix on the imaging element 1212. Each photodiode generates a photoelectric conversion current corresponding to the amount of received light, and the photoelectric conversion current is charged by a capacitor connected to each photodiode. The front surface of each pixel is provided with a Bayer array of RGB color filters, and among the image pickup elements 1212 are photosensitive elements such as a CMOS image sensor and a CCD image sensor.

The imaging element 1212 is connected to the imaging circuit 1213. The imaging circuit 1213 performs charge accumulation control and image signal readout control in the imaging element 1212, and performs waveform shaping after reducing the reset noise of the read image signal (analog image signal). Further, gain improvement or the like is performed to obtain an appropriate signal level.

The imaging circuit 1213 is connected to an A/D converter 1214 that performs analog-to-digital conversion on the analog image signal and outputs a digital image signal (hereinafter referred to as image data) to the bus 1227.

The bus 1227 is a transmission path for transmitting various data read or generated inside the camera. The A/D converter 1214 is connected to the bus 1227, and an image processor 1215, a JPEG processor 1216, a microcomputer 1217, a SDRAM (Synchronous Dynamic Random Access Memory) 1218, and a memory interface are also connected. (hereinafter referred to as memory I/F) 1219, LCD (Liquid Crystal Display) driver 1220.

The image processor 1215 performs various kinds of images such as OB subtraction processing, white balance adjustment, color matrix calculation, gamma conversion, color difference signal processing, noise removal processing, simultaneous processing, edge processing, and the like on the image data based on the output of the imaging element 1212. deal with. The JPEG processor 1216 compresses the image data read out from the SDRAM 1218 in accordance with the JPEG compression method when the image data is recorded on the recording medium 1225. Further, the JPEG processor 1216 performs decompression of JPEG image data for image reproduction display. At the time of decompression, the file recorded on the recording medium 1225 is read, and after the compression processing is performed in the JPEG processor 1216, the decompressed image data is temporarily stored in the SDRAM 1218 and displayed on the LCD 1226. Further, in the present embodiment, the JPEG method is adopted as the image compression/decompression method. However, the compression/decompression method is not limited thereto, and other compression/decompression methods such as MPEG, TIFF, and H.264 may be used.

The microcomputer 1217 functions as a control unit of the entire camera, and collectively controls various processing sequences of the camera. The microcomputer 1217 is connected to the operation unit 1223 and the flash memory 1224.

The operation unit 1223 includes but is not limited to a physical button or a virtual button, and the entity or virtual button may be a power button, a camera button, an edit button, a dynamic image button, a reproduction button, a menu. Various control buttons such as buttons, cross keys, OK buttons, delete buttons, and zoom buttons, and various input buttons and other operation controls detect the operation state of these operation controls.

The detection result is output to the microcomputer 1217. Further, a touch panel is provided on the front surface of the LCD 1226 as a display, and the touch position of the user is detected, and the touch position is output to the microcomputer 1217. The microcomputer 1217 executes various processing sequences corresponding to the user's operation in accordance with the detection result from the operation position of the operation unit 1223.

The flash memory 1224 stores programs for executing various processing sequences of the microcomputer 1217. The microcomputer 1217 performs overall control of the camera in accordance with the program. Further, the flash memory 1224 stores various adjustment values of the camera, and the microcomputer 1217 reads out the adjustment value, and performs control of the camera in accordance with the adjustment value.

The SDRAM 1218 is an electrically rewritable volatile memory for temporarily storing image data or the like. The SDRAM 1218 temporarily stores image data output from the A/D converter 1214 and image data processed in the image processor 1215, the JPEG processor 1216, and the like.

The memory interface 1219 is connected to the recording medium 1225, and performs control for writing image data and a file header attached to the image data to the recording medium 1225 and reading out from the recording medium 1225. The recording medium 1225 is, for example, a recording medium such as a memory card that can be detachably attached to the camera body. However, the recording medium 1225 is not limited thereto, and may be a hard disk or the like built in the camera body.

The LCD driver 1210 is connected to the LCD 1226, and stores image data processed by the image processor 1215 in the SDRAM 1218. When display is required, the image data stored in the SDRAM 1218 is read and displayed on the LCD 1226, or the image data stored in the JPEG processor 1216 is compressed. In the SDRAM 1218, when display is required, the JPEG processor 1216 reads the compressed image data of the SDRAM 1218, decompresses it, and displays the decompressed image data through the LCD 1226.

The LCD 1226 is configured to display an image on the back of the camera body. The LCD 1226 LCD) is not limited thereto, and various display panels (LCD 1226) such as an organic EL may be used. However, the present invention is not limited thereto, and various display panels such as an organic EL may be used.

Based on the above-described mobile terminal hardware structure and communication system, various embodiments of the method of the present invention are proposed.

Embodiment 1

The embodiment of the invention provides a mobile terminal. 5 is a schematic diagram of a functional module connection of a mobile terminal for implementing an exposure method according to an embodiment of the present invention; as shown in FIG. 5, the mobile terminal includes: a CMOS image sensing unit 41 and a plurality of electronic black cards 42; The structure of the illustrated mobile terminal is exemplified. The CMOS image sensing unit 41 can be implemented by the camera 121 shown in FIG. 2; the plurality of electronic black cards 42 can be passed through the camera 121 lens shown in FIG. 2. The electronic black card 140 on the light-incident side is realized; the plurality of electronic black cards 42 are combined to correspond to an image area of the CMOS image sensing unit 41; the electronic black card 42 is disposed in the CMOS image sensing unit 41 The light-incident side; the electronic black card 42 is in a transparent state in a power-down state; the electronic black card 42 is in a non-transparent state in a power-on state;

The mobile terminal further includes a detecting unit 43 and a control unit 44;

The detecting unit 43 is configured to detect a preview image acquired by the CMOS image sensing unit 41, and identify a first display parameter of the first region in the preview image; the first region is in the preview image Any area;

The control unit 44 is configured to control the first electronic black card 42 corresponding to the first area to be powered on based on the first display parameter obtained by the detecting unit 43.

In this embodiment, the mobile terminal may be a portable intelligent terminal such as a mobile phone, a tablet computer, or smart glasses. The CMOS image sensing unit 41 of the mobile terminal can be understood as the imaging element in FIG. 4; the CMOS image sensing unit 41 can be in a global exposure mode.

In this embodiment, the mobile terminal is provided with an electronic black card 42. The electronic black card 42 can be disposed on the light incident side of the CMOS image sensing unit 41, or can be fixed to the CMOS image sensing unit 41 by a fixing device. The light incident side, or disposed inside the CMOS image sensing unit 41, can be set by a person skilled in the art as needed.

The electronic black card 42 can be a liquid crystal panel or a transparent electronic film, and the liquid crystal panel or transparent The electronic thin film may be disposed on the light incident side of the CMOS image sensing unit 41, or may be fixed to the light incident side of the CMOS image sensing unit 41 by a fixing device. The display panel of the liquid crystal panel or the transparent electronic film can be changed by power-on to make the liquid crystal panel or the transparent electronic film in a non-transparent state. It can be understood that the electronic black card 42 can also adopt other light transmissive materials to achieve light transmission in the power-off state and opaque in the power-on state. Further, different current magnitudes loaded on the electronic black card 42 correspond to different transmittances of the electronic black card 42; it can be understood that the smaller the current loaded on the electronic black card 42, the electronic black The higher the light transmittance of the card 42, the closer the electronic black card 42 is to transparency; the greater the current loaded on the electronic black card 42, the lower the light transmittance of the electronic black card 42, the electronic black The card 42 is closer to opaque.

In this embodiment, a plurality of electronic black cards 42 are disposed on the light incident side of the mobile terminal, and the plurality of electronic black cards 42 are combined to correspond to an image collection area of the CMOS image sensing unit 41 so as to be loadable. The difference in current on the electronic black card 42 controls the transmittance of the corresponding electronic black card 42 to be different, thereby achieving the brightness of the corresponding image area. FIG. 6 is a schematic diagram of an electronic black card in a mobile terminal according to an embodiment of the present invention; the plurality of electronic black cards 42 are combined as shown in FIG. 6 , and in the present illustration, may be composed of 25 electronic black cards 42 . Each of the electronic black cards 42 is independently controlled, and the area of the combined 25 electronic black cards 42 corresponds to the image capturing area of the CMOS image sensing unit 41, and the combined 25 electronic black cards 42 cover the CMOS image. The image acquisition area of the sensing unit 41; it can be understood that the combined 25 electronic black cards 42 correspond to the images acquired by the CMOS image sensing unit 41, and each of the electronic black cards 42 corresponds to an area in the image. . Of course, the plurality of electronic black cards 42 described in this embodiment are not limited to the density and shape shown in FIG. 6, and may be specifically configured by actual conditions.

In this embodiment, the detecting unit 43 of the mobile terminal is configured to detect a preview image acquired by the CMOS image sensing unit 41, and identify display parameters of respective regions in the preview image. It can be understood that the detecting unit 43 divides the image capturing area of the CMOS image sensing unit 41 into a plurality of sub-areas in advance according to the combination manner of the plurality of electronic black cards 42 such that each electronic black card 42 Corresponds to a sub-area. Wherein the display parameter can be characterized A parameter of brightness, such as a brightness value.

In this embodiment, the control unit 44 controls the first electronic black card corresponding to the first area to be powered on based on the first display parameter obtained by the detecting unit 43 to adjust the brightness of the first area; The control unit 44 can also control the first electronic black card corresponding to the first area to be powered down to achieve brightness adjustment of a local area in the image, and avoid the problem of poor picture quality caused by overexposure of a local area in the image. To enhance the user's shooting experience.

In this embodiment, the detecting unit 43 and the control unit 44 in the mobile terminal may be used by a central processing unit (CPU, Central Processing Unit) and a digital signal processor (DSP, Digital) in the mobile terminal. Signal Processor) or a Field-Programmable Gate Array (FPGA) implementation; the CMOS sensing unit in the mobile terminal can be implemented by a CMOS sensor in practical applications; the electronic black card 42 in the mobile terminal In practical applications, it can be realized by a liquid crystal panel or an electronic film.

According to the technical solution of the embodiment of the present invention, the corresponding electronic black card (ie, the first electronic black card) is powered on based on the display parameters of the local area (ie, the first area), thereby blocking the entry into the CMOS image sensing unit. The light corresponding to the local area realizes the brightness adjustment of the local area in the image, solves the problem of uneven local exposure in the prior art, and avoids the poor picture quality caused by the overexposed partial area in the image. The problem is to enhance the user's shooting experience.

Embodiment 2

The embodiment of the present invention further provides a mobile terminal. The structure of the mobile terminal is as shown in FIG. 5. The mobile terminal includes: a CMOS image sensing unit 41 and a plurality of electronic black cards 42; The black card 42 combination corresponds to an image area of the CMOS image sensing unit 41; the electronic black card 42 is disposed on a light incident side of the CMOS image sensing unit 41; the electronic black card 42 is in a power down state a transparent state; the electronic black card 42 is in a non-transmissive state in a power-on state;

The mobile terminal further includes a detecting unit 43 and a control unit 44;

The detecting unit 43 is configured to detect a preview image acquired by the CMOS image sensing unit 41, identify a first display parameter of the first region in the preview image, and determine whether the first display parameter meets a preset condition The first area is any area in the preview image;

The control unit 44 is configured to control the first electronic black card 42 corresponding to the first area to be powered on when the detecting unit 43 recognizes that the first display parameter of the first area meets a preset condition; When the first electronic black card 42 corresponding to the first area is powered on, the first display parameter of the first area and the display parameter of the area other than the first area are adaptively adjusted. The power-on current of the first electronic black card 42 is described.

The electronic black card 42 may be a liquid crystal panel or a transparent electronic film. The liquid crystal panel or the transparent electronic film may be disposed on the light incident side of the CMOS image sensing unit 41, or may be fixed to the CMOS image sensing unit by a fixing device. The light entrance side of 41. The display panel of the liquid crystal panel or the transparent electronic film can be changed by power-on to make the liquid crystal panel or the transparent electronic film in a non-transparent state. It can be understood that the electronic black card 42 can also adopt other light transmissive materials to achieve light transmission in the power-off state and opaque in the power-on state. Further, different current magnitudes loaded on the electronic black card 42 correspond to different transmittances of the electronic black card 42; it can be understood that the smaller the current loaded on the electronic black card 42, the electronic black The higher the light transmittance of the card 42, the closer the electronic black card 42 is to transparency; the greater the current loaded on the electronic black card 42, the lower the light transmittance of the electronic black card 42, the electronic black The card 42 is closer to opaque.

In this embodiment, a plurality of electronic black cards 42 are disposed on the light incident side of the mobile terminal, and the plurality of electronic black cards 42 are combined to correspond to an image collection area of the CMOS image sensing unit 41 so as to be loadable. The difference in current on the electronic black card 42 controls the transmittance of the corresponding electronic black card 42 to be different, thereby achieving the brightness of the corresponding image area. The plurality of electronic black cards 42 combination As shown in FIG. 6, in the present illustration, 25 electronic black cards 42 may be used, and each electronic black card 42 is independently controlled. The area of the combined 25 electronic black cards 42 corresponds to the CMOS image sensing unit. An image acquisition area of 41, and the combined 25 electronic black cards 42 cover the image collection area of the CMOS image sensing unit 41; it can be understood that the combined 25 electronic black cards 42 correspond to the CMOS image transmission. The images acquired by the sensing unit 41, each of which corresponds to an area in the image. Of course, the plurality of electronic black cards 42 described in this embodiment are not limited to the density and shape shown in FIG. 6, and may be specifically configured by actual conditions.

In this embodiment, the detecting unit 43 of the mobile terminal is configured to detect a preview image acquired by the CMOS image sensing unit 41, and identify display parameters of respective regions in the preview image. It can be understood that the detecting unit 43 divides the image capturing area of the CMOS image sensing unit 41 into a plurality of sub-areas in advance according to the combination manner of the plurality of electronic black cards 42 such that each electronic black card 42 Corresponds to a sub-area. The display parameter may be a parameter that characterizes brightness, such as a brightness value.

In this embodiment, the control unit 44 controls the first electronic black card 42 corresponding to the first area to be powered on or off based on the first display parameter obtained by the detecting unit 43. Specifically, the embodiment can be implemented by at least the following embodiments:

As an embodiment, the control unit 44 is configured to control the first electronic black card 42 corresponding to the first area to be powered on when the first display parameter of the first area is higher than the first threshold.

Specifically, when the display parameter is a brightness value, the detecting unit 43 detects whether the brightness value of the first area is higher than a first threshold. The value of the brightness value ranges from 0 to 255, and the first threshold is an integer that is not greater than 255. The first threshold is 250, for example, when the detecting unit 43 detects the first area. When the brightness value is higher than 250, indicating that the first area may be in an overexposed condition, the control unit 44 controls the first electronic black card 42 corresponding to the first area to be powered on to block the entry into the CMOS. The light in the image sensing unit 41 corresponding to the area of the first electronic black card 42 reduces the brightness of the first area in the acquired image, avoiding the occurrence of overexposure of the first area.

As another implementation manner, the detecting unit 43 is configured to identify a first display parameter of the first area in the preview image; determine, according to the first display parameter, the first area as a foreground area, and determine Other areas than the first area are background areas;

The control unit 44 is configured to control the first electronic black card 42 corresponding to the first area to be powered on based on the first display parameter, or to control the electronic black card 42 corresponding to the other area except the first area. Electricity.

Specifically, the first embodiment can be applied to an application scene in which backlighting is taken when an image is taken; in backlight shooting, usually the brightness of the background area is large, and the brightness of the foreground area is small, so that the foreground area in the image (usually The subject in the image, such as a character, etc., is darker and the image quality is poor. Based on this, the detecting unit 43 identifies display parameters of each area in the preview image, and the display parameter may specifically be a brightness value; identifying a foreground area and a background area of the image based on the display parameter; and controlling the background area correspondingly At least one of the electronic black cards 42 is powered up to block light entering the CMOS image sensing unit 41 corresponding to the background area to reduce the brightness of the background area. The second embodiment can be applied to an application scene for taking close-up images of water, such as photographing seas, lakes, rivers, etc., and water is a foreground in an image. Normally, when shooting water, the water in the captured image is usually reflected by the reflection of sunlight, which greatly increases the brightness of the water in the image. Based on this, when the water is used as the foreground, the at least one electronic black card 42 corresponding to the foreground area is controlled to be powered up, thereby blocking the light entering the CMOS image sensing unit 41 corresponding to the foreground area to reduce the brightness of the foreground area. .

In this embodiment, the control unit 44 is further configured to: when the first electronic black card 42 corresponding to the first area is powered on, the first display parameter based on the first area and the first area The display parameters of the other areas are adaptively adjusted to the power-on current of the first electronic black card 42; wherein the first electronic black card is any one of the plurality of electronic black cards.

Specifically, the different current magnitudes loaded on the electronic black card 42 correspond to different transmittances of the electronic black card 42; the smaller the current loaded on the electronic black card 42, the electronic black card 42 The higher the light transmittance, the closer the electronic black card 42 is to transparency; the electronic black card 42 is loaded. The higher the current on the electron black card 42, the lower the light transmittance, and the closer the electronic black card 42 is to opacity. Based on this, in the embodiment, the control unit 44 adaptively adjusts the power-on current of the electronic black card 42 corresponding to each area based on the relative relationship between the display parameters of the respective regions in the preview image. For example, assume that the luminance value of the first region is 255, and the luminance value of the second region is 245; if the control unit 44 controls the first electronic black card 42 corresponding to the first region and the second electronic device corresponding to the second region. When the black card 42 is powered on, the currents of the first electronic black card 42 and the second electronic black card 42 may be controlled to be different based on the difference in brightness values of the first area and the second area, thereby controlling entry. The light of the CMOS image sensing unit 41 corresponding to the first area and the second area is different. In this way, on the one hand, the brightness of different areas in the image can be adjusted, the brightness adjustment of the local area in the image can be realized, and the problem of poor image quality caused by overexposure of the local area in the image can be avoided; The adjustment method can improve the quality of the image and improve the user's shooting experience.

As an implementation manner, the control unit 44 is further configured to control the plurality of electronic black cards 42 to be powered on when receiving a shutter close instruction; or, when receiving a shutter open command, control the plurality of The electronic black card 42 is powered down.

Specifically, in order to improve the flexibility of controlling the electronic black card 42, the user can manually control the power-on and power-down of the plurality of electronic black cards 42 to achieve the opening and closing of the global shutter. The user can use the virtual control on the mobile terminal display interface, the physical button or gesture on the mobile terminal, and the voice triggering the door open command and the shutter open command to realize active control of the shutter, so that the photographing process is more flexible.

It can be understood that, due to the possibility of exposure failure, such as the light intensity is too large, the image obtained by the exposure is partially too bright, and when the exposure data is read, the pixel value corresponding to each pixel point is judged whether the exposure fails (such as local Too bright), when the exposure fails, the operation of this embodiment is re-executed.

As an implementation manner, the control unit 44 is further configured to obtain a state of the electronic black card when the photographing instruction is detected; and when the state of the electronic black card is a power-on state, the control station The electronic black card is switched to a power down state to cause the CMOS image sensing unit to perform global exposure.

In this embodiment, the detecting unit 43 and the control unit 44 in the mobile terminal can be implemented by a CPU, a DSP or an FPGA in the mobile terminal in actual applications; the CMOS sensing unit in the mobile terminal is in The practical application can be implemented by a CMOS sensor; the electronic black card 42 in the mobile terminal can be realized by a liquid crystal panel or an electronic film in practical applications.

It should be emphasized that, for those skilled in the art, the functional block diagram shown in FIG. 5 is merely an exemplary diagram of an embodiment, and those skilled in the art can surround the functional modules of the exposure apparatus of the mobile terminal shown in FIG. The function modules of the present invention are not limited to the technical solutions of the present invention. The core is the function that each functional module of the defined name has to achieve.

Embodiment 3

The embodiment of the present invention further provides an exposure method, where the method is applied to an electronic device; the mobile terminal includes a CMOS image sensing unit and a plurality of electronic black cards; The electronic black card combination corresponds to an image area of the CMOS image sensing unit; the electronic black card is disposed on a light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power down state The electronic black card is in a non-transmissive state in a power-on state. FIG. 7 is a schematic flowchart of an exposure method according to an embodiment of the present invention; as shown in FIG. 7, the method includes:

Step 501: Detect a preview image acquired by the CMOS image sensing unit, and identify the Previewing a first display parameter of the first region in the image; the first region being any of the regions in the preview image.

Step 502: Control the first electronic black card corresponding to the first area to be powered on based on the first display parameter.

In this embodiment, the mobile terminal is provided with an electronic black card; the electronic black card may be disposed on the light incident side of the CMOS image sensing unit, or may be fixed to the light incident side of the CMOS image sensing unit by a fixing device. Or, disposed inside the CMOS image sensing unit, those skilled in the art can set the position of the electronic black card as needed. The different current magnitudes loaded on the electronic black card are different according to the transmittance of the electronic black card; it can be understood that the smaller the current loaded on the electronic black card, the light transmission of the electronic black card. The higher the rate, the closer the electronic black card is to transparency; the greater the current loaded on the electronic black card, the lower the light transmittance of the electronic black card, the closer the electronic black card is to opacity.

In this embodiment, a plurality of electronic black cards are disposed on the light incident side of the mobile terminal, and the plurality of electronic black card combinations correspond to an image collection area of the CMOS image sensing unit, so as to be loaded in the electronic black. The difference in current on the card controls the transmittance of the corresponding electronic black card to be different, thereby achieving the brightness of the corresponding image area. The plurality of electronic black cards are combined as shown in FIG. 6. In the present illustration, 25 electronic black cards may be used, and each electronic black card is independently controlled, and the combined 25 electronic black cards have an area corresponding to the The image acquisition area of the CMOS image sensing unit, and the combined 25 electronic black cards cover the image acquisition area of the CMOS image sensing unit; it can be understood that the combined 25 electronic black cards correspond to the CMOS image. The image acquired by the sensing unit, each electronic black card corresponds to an area in the image. Of course, the plurality of electronic black cards described in this embodiment are not limited to the density and shape shown in FIG. 6, and may be specifically configured by actual conditions.

In this embodiment, the mobile terminal detects a preview image acquired by the CMOS image sensing unit, and identifies display parameters of each region in the preview image. It can be understood that the image acquisition of the CMOS image sensing unit is previously performed in advance according to the combination manner of the plurality of electronic black cards. The area is divided into a plurality of sub-areas such that each electronic black card corresponds to one sub-area. The display parameter may be a parameter that characterizes brightness, such as a brightness value.

In this embodiment, the first electronic black card corresponding to the first area is powered on based on the obtained first display parameter to adjust the brightness of the first area, and the brightness of the local area in the image is adjusted to avoid the image. The problem of poor picture quality caused by overexposed partial areas in the area improves the user's shooting experience.

Embodiment 4

The embodiment of the present invention further provides an exposure method, where the method is applied to an electronic device; the mobile terminal includes a CMOS image sensing unit and a plurality of electronic black cards; The electronic black card combination corresponds to an image area of the CMOS image sensing unit; the electronic black card is disposed on a light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power down state The electronic black card is in a non-transmissive state in a power-on state. FIG. 8 is another schematic flowchart of an exposure method according to an embodiment of the present invention; as shown in FIG. 8, the method includes:

Step 601: Detect a preview image acquired by the CMOS image sensing unit, and identify a first display parameter of the first region in the preview image; the first region is any region in the preview image.

Step 602: Control the first electronic black card corresponding to the first area to be powered on based on the first display parameter.

Step 603: based on the first display parameter of the first area and other than the first area The display parameters of other areas adaptively adjust the power-on current of the first electronic black card.

In this embodiment, the preview image acquired by the CMOS image sensing unit is detected, and display parameters of respective regions in the preview image are identified. It can be understood that the image collection area of the CMOS image sensing unit is divided into a plurality of sub-areas in advance according to a combination manner of the plurality of electronic black cards, so that each electronic black card corresponds to one sub-area. The display parameter may be a parameter that characterizes brightness, such as a brightness value.

In this embodiment, the controlling the first region corresponding to the first display parameter An electronic black card is powered. Specifically, the embodiment can be implemented by at least the following embodiments:

As an implementation manner, the controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on, includes: when a first display parameter of the first area is higher than a first threshold And controlling the first electronic black card corresponding to the first area to be powered on.

Specifically, when the display parameter is a brightness value, it is detected whether the brightness value of the first area is higher than a first threshold. The brightness value ranges from 0 to 255, and the first threshold is an integer that is not greater than 255. The first threshold is 250. When the brightness of the first area is detected to be higher than At 250 o'clock, indicating that the first area may be in an overexposed condition, controlling the first electronic black card corresponding to the first area to be powered up to block entry into the CMOS image sensing unit corresponding to the first The light of the electronic black card area, thereby reducing the brightness of the first area in the acquired image, avoiding the occurrence of overexposure of the first area.

In another embodiment, the controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on includes: identifying a first display parameter of the first area in the preview image; Determining, according to the first display parameter, that the first area is a foreground area, and determining that other areas than the first area are background areas; and controlling, by the first display parameter, the first area corresponding to the first area The electronic black card is powered on; or the electronic black card corresponding to the other area except the first area is powered on.

Specifically, the first embodiment can be applied to an application scene in which backlight shooting is performed when an image is taken; in backlight shooting, generally, the brightness of the background area is large, and the brightness of the foreground area is small (for example, lower than the third threshold). The foreground area (usually the subject in the image, such as a character, etc.) in the image is darker and the image quality is poor. Based on this, identifying display parameters of each region in the preview image, the display parameter may specifically be a brightness value; identifying a foreground region and a background region of the image based on the display parameter; controlling at least one electronic black corresponding to the background region The card is powered up to block light entering the CMOS image sensing unit corresponding to the background area to reduce the brightness of the background area. The second embodiment can be applied to an application scene for taking close-up images of water, such as photographing seas, lakes, rivers, etc., and water is a foreground in an image. usually, When shooting water, the water in the captured image is usually reflected by the reflection of sunlight, which greatly increases the brightness of the water in the image. Based on this, when the water is used as the foreground, the brightness of the foreground area is relatively large (for example, higher than the second threshold), and at least one electronic black card corresponding to the foreground area is controlled to be powered up, thereby blocking the CMOS image transmission corresponding to the foreground area. The light of the unit is sensed to reduce the brightness of the foreground area.

In this embodiment, when the first electronic black card corresponding to the first area is powered on, based on the first display parameter of the first area and the display parameters of other areas except the first area, Adapting to adjust a power-on current of the first electronic black card; wherein the first electronic black card is any one of the plurality of electronic black cards.

Specifically, the different current magnitudes loaded on the electronic black card correspond to different transmittances of the electronic black card; the smaller the current loaded on the electronic black card, the higher the transmittance of the electronic black card High, the electronic black card is closer to being transparent; the greater the current loaded on the electronic black card, the lower the light transmittance of the electronic black card, the closer the electronic black card is to opacity. Based on this, in this embodiment, based on the relative relationship between the display parameters of the respective regions in the preview image, the power-on current of the electronic black card corresponding to each region is adaptively adjusted. For example, if the brightness value of the first area is 255, the brightness value of the second area is 245; if the control unit controls the first electronic black card corresponding to the first area and the second electronic black card corresponding to the second area At the time of power-on, the currents of the first electronic black card and the second electronic black card may be controlled to be different according to different brightness values of the first region and the second region, so that the control entry corresponds to the first The light of the CMOS image sensing unit of a region and the second region is different. In this way, on the one hand, the brightness of different areas in the image can be adjusted, the brightness adjustment of the local area in the image can be realized, and the problem of poor image quality caused by overexposure of the local area in the image can be avoided; The adjustment method can improve the quality of the image and improve the user's shooting experience.

Specifically, in order to improve the flexibility of the electronic black card control, the user can manually control the power-on and power-down of the plurality of electronic black cards to achieve the opening and closing of the global shutter. The user can use the virtual control on the mobile terminal display interface, the physical button or gesture on the mobile terminal, and the voice triggering the door open command and the shutter open command to realize active control of the shutter, so that the photographing process is more flexible.

As an embodiment, the method further includes: obtaining a state of the electronic black card when detecting a photographing instruction; and controlling the electronic black card to switch to when the state of the electronic black card is a powered state An electrical state to cause the CMOS image sensing unit to perform global exposure.

FIG. 9 is a schematic diagram of a test control device as a hardware entity according to an embodiment of the present invention; as shown in FIG. 9, the mobile terminal includes a processor 71, a storage medium 72, a CMOS sensor 74, and at least one external communication interface 73; The processor 71, the storage medium 72, the CMOS sensor 74, and the external communication interface 73 are all connected by a bus 75.

It should be noted here that the above description of the test control method is similar to the above description of the test control device, and the description of the beneficial effects of the device will not be repeated. For technical details not disclosed in the embodiment of the mobile terminal of the present invention, please refer to the description of the embodiment of the test control device of the present invention.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes those elements. It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; The unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a mobile storage device, a read only memory (ROM, Read-Only) Memory, random access memory (RAM), disk or optical disk, and other media that can store program code.

Alternatively, the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Industrial applicability

The embodiment of the present invention performs power-on processing on the corresponding electronic black card (ie, the first electronic black card) based on the display parameters of the local area (ie, the first area), thereby blocking the entry into the CMOS image sensing unit corresponding to the local portion. The light of the area realizes the brightness adjustment of the local area in the image, solves the problem of uneven local exposure in the prior art, and avoids the problem of poor picture quality caused by overexposure of the local area in the image, and improves the user's Shooting experience.

Claims

A mobile terminal comprising: a CMOS image sensing unit and a plurality of electronic black cards; the plurality of electronic black card combinations corresponding to an image area of the CMOS image sensing unit; the electronic black card setting On the light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power-down state; the electronic black card is in a non-transmissive state in a power-on state;

The mobile terminal further includes a detecting unit and a control unit; wherein

The detecting unit is configured to detect a preview image acquired by the CMOS image sensing unit, and identify a first display parameter of the first region in the preview image; the first region is any one of the preview images region;

The control unit is configured to control the first electronic black card corresponding to the first area to be powered on based on the first display parameter obtained by the detecting unit.
The mobile terminal according to claim 1, wherein the control unit is configured to control a first electronic black card corresponding to the first area when a first display parameter of the first area is higher than a first threshold Power-on.
The mobile terminal according to claim 1, wherein the detecting unit is configured to identify a first display parameter of the first region in the preview image; and determine the first region as a foreground based on the first display parameter a region, and determining other regions than the first region as background regions;

The control unit is configured to control the first electronic black card corresponding to the first area to be powered on based on the first display parameter, or to control an electronic black card corresponding to another area other than the first area to be powered on.
The mobile terminal of claim 1, wherein the current loaded on the electronic black card is different from the light transmittance of the electronic black card.
The mobile terminal according to any one of claims 1 to 4, wherein the control unit is further configured to control, when the first electronic black card corresponding to the first area is powered on, based on the first area Adaptively adjusting a power-on current of the first electronic black card, where the first electronic black card is the plurality of first display parameters of the domain and display parameters of the other regions except the first region; Any electronic black card in an electronic black card.
The mobile terminal according to claim 1, wherein the control module is further configured to control the plurality of electronic black cards to be powered on when receiving a shutter close instruction; or, when receiving a shutter open command, to control The plurality of electronic black cards are powered down.
The mobile terminal according to claim 1, wherein the electronic black card is disposed on a surface of the light incident side of the CMOS image sensing unit, or is fixed to a light incident side of the CMOS image sensing unit, or is set Inside the CMOS image sensing unit.
The mobile terminal according to claim 3, wherein the control unit is configured to control, when the first display parameter is higher than the second threshold, to power on the first electronic black card corresponding to the first area, to The first display parameter is made not higher than the second threshold.
The mobile terminal according to claim 3, wherein the control unit is configured to control an electronic black card corresponding to another area other than the first area to be powered when the first display parameter is lower than a third threshold .
The mobile terminal according to claim 1, wherein the control unit is further configured to obtain a state of the electronic black card when a photographing instruction is detected; and to control when the state of the electronic black card is a power-on state The electronic black card switches to a power down state to cause the CMOS image sensing unit to perform global exposure.
An exposure method is applied to a mobile terminal; the mobile terminal includes a CMOS image sensing unit and a plurality of electronic black cards; and the plurality of electronic black card combinations correspond to an image area of the CMOS image sensing unit; The electronic black card is disposed on a light incident side of the CMOS image sensing unit; the electronic black card is in a transparent state in a power down state; and the electronic black card is in a non-light transmitting state in a power-on state; Methods include:

Detecting a preview image acquired by the CMOS image sensing unit, and identifying a first display parameter of the first region in the preview image; the first region being any region in the preview image;

Controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on.
The method of claim 11, wherein the controlling the first electronic black card corresponding to the first area to be powered based on the first display parameter comprises:

When the first display parameter of the first area is higher than the first threshold, the first electronic black card corresponding to the first area is controlled to be powered on.
The method of claim 11, wherein the controlling the first electronic black card corresponding to the first area to be powered based on the first display parameter comprises:

Identifying a first display parameter of the first region in the preview image; determining, according to the first display parameter, that the first region is a foreground region, and determining that other regions than the first region are background regions;

Controlling, by the first display parameter, the first electronic black card corresponding to the first area to be powered on; or controlling the electronic black card corresponding to the other area except the first area to be powered on.
The method of claim 11 wherein the currents loaded on the electronic black card differ in light transmittance corresponding to the electronic black card.
The method according to any one of claims 11 to 14, wherein after the controlling the first electronic black card corresponding to the first area is powered on, the method further comprises:

Adaptively adjusting a power-on current of the first electronic black card based on a first display parameter of the first region and display parameters of other regions than the first region; wherein the first electronic black card Is any one of the plurality of electronic black cards.
The method of claim 11, wherein the method further comprises: controlling the plurality of electronic black cards to power up upon receiving a shutter close command; or controlling the plurality of times when receiving a shutter open command An electronic black card is powered down.
The method of claim 13, wherein the controlling the first electronic black card corresponding to the first area to be powered based on the first display parameter comprises:

When the first display parameter is higher than the second threshold, the first electronic black card corresponding to the first area is controlled to be powered up, so that the first display parameter is not higher than the second threshold.
The method of claim 13, wherein the controlling the electronic black card corresponding to the other areas other than the first area is powered on, including:

When the first display parameter is lower than the third threshold, the electronic black card corresponding to the other areas other than the first area is controlled to be powered on.
The method of claim 11 wherein the method further comprises:

When the photographing instruction is detected, obtaining the state of the electronic black card; when the state of the electronic black card is the power-on state, controlling the electronic black card to switch to the power-down state, so that the CMOS image sensing unit Make a global exposure.
A computer storage medium having computer executable instructions stored thereon, the computer executable instructions being configured to perform the exposure method of any one of claims 11 to 19.