CN105592265A - Pixel-switching method of image sensor, photographing device, and terminal - Google Patents
Pixel-switching method of image sensor, photographing device, and terminal Download PDFInfo
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- CN105592265A CN105592265A CN201510964963.8A CN201510964963A CN105592265A CN 105592265 A CN105592265 A CN 105592265A CN 201510964963 A CN201510964963 A CN 201510964963A CN 105592265 A CN105592265 A CN 105592265A
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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
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
Abstract
The invention discloses a pixel-switching method of an image sensor. Each light-filtering unit of the image sensor covers multiple pixel units and forms a pixel structural unit. In each pixel structural unit, the pixel units in the same column use the same selection signal driver and the pixel units in the same row use different selection signal drivers. The method comprises steps of: in a normal mode, synchronously enabling pixel units in every other rows in each pixel structural unit to be exposed and synchronously enabling the selection signal drivers of the pixel units in each column to operate successively; in a night view mode, synchronously enabling the selection signal drivers of the pixel units in each column in each pixel structural unit to operate simultaneously, and synchronously enabling the pixel units in each row in each pixel structural unit to be exposed simultaneously; and reading outputs of an pixel array and combining the outputs according to a determined photographing mode in order to obtain pixel data corresponding to the photographing mode. The pixel-switching method may satisfy a requirement of photographing scenes. The invention also discloses a photographing device and a terminal.
Description
Technical field
The invention belongs to shooting technology field, relate in particular to a kind of pixel changing method, camera arrangement and tool of imageing sensorThere is the terminal of this camera arrangement.
Background technology
Along with popularizing of camera arrangement, for example mobile phone photograph of use camera arrangement becomes more and more people's hobby, but along withTo the raising of taking pictures and requiring, adopt the sensor of high pixel, clap effect night unsatisfactory, and adopt the sensor of large pixel,Improved and clapped effect night, but modular volume is larger, affect construction profile design, not attractive in appearance. Therefore, current taking picturesDevice, the effect requirements can not meet well normal scene and night scene and take pictures time.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique. For this reason, the present invention need to carryThe pixel changing method that goes out a kind of imageing sensor, the method can meet the demand of the current scene of taking pictures, and promotes picture quality.
The present invention also proposes a kind of camera arrangement and has the terminal of this camera arrangement.
In order to address the above problem, one aspect of the present invention proposes a kind of pixel changing method of imageing sensor, wherein, described inImageing sensor comprises pel array and is arranged on the filter array on described pel array, the each filter in described filter arrayLight unit covers multiple pixel cells and forms dot structure unit, and in each dot structure unit, the pixel list of same columnUnit adopts identical selection signal driver, and colleague's pixel cell adopts different selection signal drivers, described method comprise withLower step: the brightness value that obtains current scene; If being more than or equal to luminance threshold, described brightness value is defined as normal mode,Synchronously control the pixel cell interlacing exposure in each described dot structure unit, and synchronously control each described pixelIn construction unit, the selection signal driver of the described pixel cell of every row is sequentially worked; Or, if described brightness value is less thanDescribed luminance threshold is defined as night scene mode, synchronously controls the described pixel of the every row in each described dot structure unitThe selection signal driver of unit is worked simultaneously, and synchronously controls the described pixel of the every row in each described dot structure unitUnit exposes simultaneously; And, the output of reading described pel array, and according to determine described exposal model to described outputMerge to obtain the pixel data of corresponding described exposal model.
The pixel changing method of imageing sensor of the present invention, each filter unit of imageing sensor covers multiple pixel listsUnit, and in each dot structure unit, the pixel cell of same column adopts identical selection signal driver, colleague's pixel listUnit adopts different selection signal drivers, provides hardware foundation for realizing pixel switching; And then, bright according to current sceneIt is night scene mode or normal mode that degree value is determined, and realizes certainly according to the output of exposal model control pixel value and processingSwitch pixel by ground, both can meet the definition that normal scene is taken pictures, can promote again the effect of taking pictures under night scene,Ensure picture quality.
Particularly, described each filter unit covers 2*2 described pixel cell, and in each described dot structure unitThe described pixel cell of one row adopts first to select signal driver, and the described pixel cell of another row adopts second to select signal to driveMoving, wherein, in the time being described normal mode, the pixel cell interlacing of synchronously controlling in each described dot structure unit is exposed to the sunLight, and synchronously control described first in each described dot structure unit and select signal driver and described second to select signalDrive and sequentially work.
And then cover 2*2 described pixel cell for described each filter unit, described in read described pel array output,And according to definite exposal model, output is merged to obtain the pixel data of corresponding described exposal model, specifically comprise:In the time of the capable exposure of 2i+1, read respectively described pel array described first select signal driver when work output and described inThe output of pel array in the time that described second selects signal driver work, wherein, i is more than or equal to 0 integer; ?When the capable exposure of 2i+2, read respectively output and the described pixel of described pel array in the time that described first selects signal driver workThe output of array in the time that described second selects signal driver work; According to read the capable exposure of 2i+1 time and 2i+2 is capable exposes to the sunThe output of the described pel array of light time synthesizes to obtain the pixel data under described normal mode.
Wherein, in the time being described night scene mode, synchronously controlling described first in each described dot structure unit and select letterNumber drive and described second selection signal driver work simultaneously; And, control 2i+1 in described pel array capable andThe described pixel cell that 2i+2 is capable exposes simultaneously, and wherein, i is more than or equal to 0 integer.
Further, described in read described pel array output, and according to definite exposal model to output merge withThe pixel data that obtains corresponding described exposal model, specifically comprises: read the output of described pel array, and by described in sameThe output of the described pixel cell of dot structure unit is added to obtain the pixel value of described dot structure unit; And, by instituteThere is the pixel value of described dot structure unit to merge to generate the pixel data under corresponding described night scene mode.
In order to address the above problem, the present invention proposes a kind of camera arrangement on the other hand, and this camera arrangement comprises: image sensingDevice, described imageing sensor comprises pel array and is arranged on the filter array on described pel array, in described filter arrayEach filter unit cover multiple pixel cells and form dot structure unit, and in each dot structure unit, same columnPixel cell adopt identical selection signal driver, colleague's pixel cell adopts different selection signal drivers; With, figurePicture processor, described image processor obtains the brightness value of current scene, is more than or equal to luminance threshold true at described brightness valueWhile being decided to be normal mode, synchronously control the pixel cell interlacing exposure in each described dot structure unit, and synchronously controlMake the selection signal driver of the described pixel cell of every row in each described dot structure unit and sequentially work, or, in instituteWhen stating brightness value and being less than described luminance threshold and being defined as night scene mode, synchronously control every in each described dot structure unitThe selection signal driver of described pixel cell of row is worked simultaneously, and synchronously controls every in each described dot structure unitThe described pixel cell of row exposes simultaneously, and, the output of reading described pel array, and according to the mould of taking pictures described in determiningFormula merges to obtain the pixel data of corresponding described exposal model to described output.
Camera arrangement of the present invention, each filter unit of imageing sensor covers multiple pixel cells, and in each pixelIn construction unit, the pixel cell of same column adopts identical selection signal driver, and colleague's pixel cell adopts different selectionsSignal driver, provides hardware foundation for realizing pixel switching; And then, determine it is night scene mould according to the brightness value of current sceneFormula or normal mode, and according to exposal model control pixel value output with process to realize and freely switch pixel, bothCan meet the definition that normal scene is taken pictures, can promote again the effect of taking pictures under night scene, ensure picture quality.
Particularly, described each filter unit covers 2*2 pixel cell, and the picture of the row of one in each dot structure unitElement unit adopts first to select signal driver, and the pixel cell of another row adopts second to select signal driver, described image processingDevice also for, in the time of described normal mode, synchronously control pixel cell interlacing in each described dot structure unit exposure,And synchronously control described first in each described dot structure unit and select signal driver and described second to select signal driverSequentially work.
Further, described image processor also for, in the time of the capable exposure of 2i+1, read respectively described pel array in instituteState defeated in the time that described second selects signal driver work of the output in first selection signal driver when work and described pel arrayGo out, in the time of the capable exposure of 2i+2, read respectively described pel array described first select signal driver when work output andDescribed pel array is selected the signal driver output in when work described second, and, according to the capable exposure of the 2i+1 reading withThe output of the described pel array of the capable exposure of 2i+2 synthesizes to obtain the pixel data under described normal mode, wherein,I is more than or equal to 0 integer.
Described image processor also for, in the time of described night scene mode, synchronously control in each described dot structure unitDescribed first selects signal driver and described second to select signal driver to work simultaneously, and controls the in described pel arrayThe pixel cell that 2i+1 is capable and 2i+2 is capable exposes simultaneously, and wherein, i is more than or equal to 0 integer.
Described image processor is also for, the output of reading described pel array, and by the institute of same described dot structure unitThe output of stating pixel cell is added to obtain the pixel value of described dot structure unit, and by all described dot structures unitPixel value merge to generate the pixel data under corresponding described night scene mode.
In order to address the above problem, the present invention proposes a kind of terminal on the one hand, and this terminal comprises above-mentioned camera arrangement.
Terminal of the present invention, can take pictures, and possesses pixel handoff functionality, meets the demand of the current scene of taking pictures, and promotes figureImage quality.
Brief description of the drawings
Fig. 1 is the flow chart of the pixel changing method of imageing sensor according to an embodiment of the invention;
Fig. 2 is according to the distribution schematic diagram of the filter array of a specific embodiment of the present invention;
Fig. 3 is according to the circuit diagram of the dot structure unit of a specific embodiment of the present invention;
Fig. 4 is the capable exposure of 2i+1 and first according to pel array under the normal mode of another specific embodiment of the present inventionOutput schematic diagram data while selecting signal driver work;
Fig. 5 is the capable exposure of 2i+1 and second according to pel array under the normal mode of another specific embodiment of the present inventionOutput schematic diagram data while selecting signal driver work;
Fig. 6 is according to the capable exposure of 2i+2 of pel array under the normal mode of a specific embodiment of the present invention and the first choosingOutput schematic diagram data while selecting signal driver work;
Fig. 7 is the capable exposure of 2i+2 and second according to pel array under the normal mode of another specific embodiment of the present inventionOutput schematic diagram data while selecting signal driver work;
Fig. 8 is according to the synthesis mode of the output data of pel array under the normal mode of another specific embodiment of the present inventionSchematic diagram;
Fig. 9 is the signal according to final synthetic pixel data is arranged under the normal mode of another specific embodiment of the present inventionFigure;
(1) in Figure 10 and (2) are pel array output data under night scene mode according to still a further embodimentThe schematic diagram of building-up process;
Figure 11 is the block diagram of camera arrangement according to an embodiment of the invention; And
Figure 12 is the block diagram of terminal according to still another embodiment of the invention.
Reference numeral:
Camera arrangement 100,
Imageing sensor 10 and image processor 20,
Pel array 11 and filter array 12, filter unit 121 and pixel cell 111.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, wherein identical from start to finishOr similarly label represents same or similar element or has the element of identical or similar functions. Below by retouching with reference to accompanying drawingThe embodiment stating is exemplary, is intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
Based on the problem in correlation technique, the embodiment of the present invention proposes a kind of pixel changing method, bat of imageing sensorAccording to the terminal of installing and have this camera arrangement, can support freely switching of height pixel, both can meet normal fieldThe scape demand to high pixel of taking pictures, can obtain again and clap effect good night.
The pixel changing method of the imageing sensor proposing according to the embodiment of the present invention is described with reference to the accompanying drawings. Wherein, figureImage-position sensor comprises pel array and is arranged on the filter array on pel array, the each filter unit covering in filter arrayMultiple pixel cells also form dot structure unit, i.e. the filter unit of the corresponding same color of the plurality of pixel cell, particularly,Filter unit can be integrated structure, or is connected by the micro optical filter assembling after the independent moulding of the each pixel cell list coveringBe connected together, thereby provide basis for multiple pixel cells being merged into an include monochrome pixels output. And at each pixel knotIn structure unit, it is the electric charge biography of for example photodiode of pixel cell that the pixel cell of same column adopts identical selection signal driverDefeated switch is transistorized grid voltage for example, and colleague's pixel cell adopts different selection signal drivers.
Fig. 1 is the flow chart of pixel changing method according to an embodiment of the invention, as shown in Figure 1, and the methodComprise the following steps:
S1, obtains the brightness value of current scene. For example, obtain the ISO value of scene or AE (AutomaticExposure,Automatic exposure) value.
S2, is defined as normal mode if brightness value is more than or equal to luminance threshold, synchronously controls each dot structure listPixel cell interlacing in unit exposes, and synchronously controls the selection signal of the pixel cell of every row in each dot structure unitDrive and sequentially work.
S3, is defined as night scene mode if brightness value is less than luminance threshold, synchronously controls in each dot structure unitThe selection signal driver of the pixel cell of every row is worked simultaneously, and synchronously controls the picture of the every row in each dot structure unitElement unit exposes simultaneously.
S4, the output of read pixel array, and according to definite exposal model, output is merged to obtain to taking picturesThe pixel data of pattern.
For example, for normal mode, the output of pel array can be merged into the pixel data form that normal Bayer is arranged,To ensure the rate respectively of high Pixel Dimensions; For clapping pattern night, the output of dot structure unit can be merged to improve nightThe sensitivity of taking pictures.
The pixel changing method of the embodiment of the present invention, each filter unit of imageing sensor covers multiple pixel cells,And in each dot structure unit, the pixel cell of same column adopts identical selection signal driver, and colleague's pixel cell is adoptedWith different selection signal drivers, provide hardware foundation for realizing pixel switching; And then, according to the brightness value of current sceneDetermine it is night scene mode or normal mode, and realize freely according to the output of exposal model control pixel value and processingSwitch pixel, both can meet the definition that normal scene is taken pictures, can promote again the effect of taking pictures under night scene, ensurePicture quality.
In certain embodiments of the present invention, each filter unit can cover n*n pixel cell, shown in Fig. 2,Each filter unit covers 2*2 pixel cell (1,2,3,4 unit that for example, wherein identical characters Gr distributes).Fig. 3 is according to the circuit connection diagram of the dot structure unit of another specific embodiment of the present invention, shown in Fig. 3,Four pixel cells (PD1, PD2, PD3 and PD4) in dot structure unit share a SF and an ADC. Be expert atDirection, it is power drives that adjacent pixel unit adopts different selection signal drivers, i.e. row in each dot structure unitFor example PD1 of pixel cell and PD2 adopt first to select signal driver such as Vpixel1, the pixel cell of another row is for examplePD3 and PD4 adopt second to select such as Vpixel2 of signal driver. As shown in Figure 3, the row in each dot structure unitTransmitting switch (transistor) TX1 of pixel cell and the grid of TX2 be connected drive wire Vpixel1, the pixel list of another rowTransmitting switch (transistor) TX3 of unit and the grid of TX4 are connected drive wire Vpixel2, drive signal to transmit by drive wireTo pixel cell, realize the control of the selection signal driver to pixel cell.
Cover 2*2 pixel cell as example below with reference to Fig. 3 taking each filter unit, clap pattern at normal mode and night to realizingBetween pixel switch describe.
In the process of taking pictures, in the time being normal mode, the pixel cell interlacing of synchronously controlling in each dot structure unit is exposed to the sunLight, and synchronously control first in each dot structure unit and select signal driver and second to select sequentially work of signal driverDo. And the output of read pixel array, for example, in the time of the capable exposure of 2i+1, read pixel array is believed in the first selection respectivelyNumber drive output and the output of pel array in the time of the second selection signal driver work when work, wherein, i for be greater than or etc.In 0 integer; In the time of the capable exposure of 2i+2, the output of read pixel array in the time of the first selection signal driver work respectivelyWith the output of pel array in the time that the second selection signal driver is worked.
Particularly, consulting shown in Fig. 3, is current scene during at normal brightness at normal mode, Vpixel1 and Vpixel2Sequentially work, be distributed as example with the filter unit shown in Fig. 2, in the time of the capable exposure of 2i+1 and Vpixel1 work, pixelArray output data as shown in Figure 4, are equivalent to read the pixel output of corresponding PD1 in each dot structure unit. At 2i+1When row exposure and Vpixel2 work, pel array output data as shown in Figure 5, are equivalent to read each dot structure unitThe pixel output of middle corresponding PD3. In the time of the capable exposure of 2i+1 and Vpixel1 work, pel array output data are as Fig. 6 instituteShow,, the pixel output that is equivalent to read corresponding PD2 in each dot structure unit. At the capable exposure of 2i+2 and Vpixel2When work, pel array output data as shown in Figure 7, are equivalent to read the pixel of corresponding PD4 in each dot structure unitOutput.
Be understandable that, the data of reading are stored in register, when output data are synthesized, from this register, adjustGet corresponding data.
The output of the pel array during further, according to capable when exposure of the 2i+1 reading and the capable exposure of 2i+2 is closedBecome to obtain the pixel data under normal mode.
Particularly, according to the output data of Fig. 4, Fig. 5, Fig. 6 and Fig. 7, and under normal mode, export data and need to meetNormal Bayer spread pattern, carries out data when synthetic at ISP end, by output number as shown in Figure 4, Figure 5, Figure 6 and Figure 7Adjacent four output valves are unit according to mode cross arrangement successively as shown in Figure 8, final synthetic data respectively according to thisAs shown in Figure 9. Visible, obtain the pixel data form that normal Bayer is arranged, and ensured the resolution ratio of high Pixel Dimensions.
In the time being night scene mode, synchronously controlling first in each dot structure unit and select signal driver and second to select letterNumber drive and to work simultaneously, and control the pixel cell that 2i+1 is capable and 2i+2 is capable of the in pel array and expose simultaneously, wherein,I is more than or equal to 0 integer.
Particularly, consult shown in Fig. 3, in low-light level situation, Vpixel1 and Vpixel2 work simultaneously, and pixelIn array, 2i+1 is capable exposes with 2i+2 is capable simultaneously. Now, the pixel cell being covered by same filter unit is fourThe pixel cell (being PD1, PD2, PD3 and PD4) of individual same color is worked simultaneously, and the electronics that SF unit is collected is fourIndividual pixel cell and, as shown in (1) in Figure 10 and (2), be equivalent to four same colors pixel cell synthesizeOutput, for example, for 16M pixel, output pixel data is 4M. So, each pixel sensitivity degree is before becoming4 times, improve widely the sensitivity of taking pictures night, obtain and take a picture high-quality night.
Put it briefly, cover the structure of 2*2 pixel cell based on each filter unit, for the image sensing of 16M pixelDevice, the pixel changing method of embodiment of the present invention both can become the raw 4M pixel merging figure of (pixel of 2*2 is merged)Picture, also can generate the original image of 16M pixel (being nonjoinder), can realize normal mode and night according to the brightness value of sceneThe switching of the pixel between bat pattern, the take pictures demand of scene of satisfied difference, both can meet clear that normal scene takes picturesDegree, can promote again the effect of taking pictures under night scene, ensures picture quality.
In an embodiment of the present invention, dot structure unit, except 2*2 structure, also has for example 3*3,4*4, or even appointN*m (n and m the are natural number) structure of meaning, if be appreciated that, the pixel value of pel array is 16M, adopts the picture of 2*2Element construction unit can obtain the merging image that resolution ratio is 4M, and adopts 4*4 structure can obtain the merging figure that resolution ratio is 1MPicture. In practical application, while realizing the pixel switching of normal mode and Night, need to drive the selection signal of pixel cellWhen moving control and the output of pel array being processed, do the adjustment on corresponding mathematical algorithm. But, on pel arrayThe number of sequencable pixel cell is limited, and the pixel cell that each dot structure unit comprises is too much, imageResolution sizes can be restricted, can be to the consideration of rate size respectively in practical application, and dot structure unit is carried outSet.
The pixel changing method of the imageing sensor based on above-mentioned aspect, carries out the camera arrangement of the embodiment of the present invention below in detailDescribe in detail bright.
Figure 11 is the block diagram of camera arrangement according to an embodiment of the invention, and as shown in figure 11, camera arrangement 100 wrapsDraw together imageing sensor 10 and image processor 20.
Imageing sensor 10 comprises pel array 11 and is arranged on the filter array 12 on pel array 11, filter array 12In each filter unit 121 cover multiple pixel cells 111 and form dot structure unit, be i.e. the plurality of pixel cell pairAnswer the filter unit of same color, and in each dot structure unit, the pixel cell 111 of same column adopts identical selectionSignal driver, colleague's pixel cell 111 adopts different selection signal drivers.
In certain embodiments of the present invention, each filter unit 121 can cover n*n (n is positive integer, and n >=2)Individual pixel cell 111, shown in Fig. 2, each filter unit 121 covers 2*2 pixel cell 111, particularly, filterLight unit can be integrated structure, or by the micro optical filter assembly and connection after four independent moulding together.
As shown in Figure 3, the pixel cell 111 of the row of one in each dot structure unit adopts the first selection signal driver, anotherThe pixel cell 111 of one row adopts the second selection signal driver. Particularly, four pixel cells 111 in dot structure unitShare a SF and an ADC. In the row direction, to adopt different selection signal drivers be that power supply drives to adjacent pixel unit 111Moving, for example PD1 of pixel cell 111 of the row of one in each dot structure unit and PD2 adopt first to select signal driverFor example Vpixel1, for example PD3 of pixel cell 111 of another row and PD4 adopt second to select such as Vpixel2 of signal driver.
Image processor 20 obtains the brightness value of current scene, is more than or equal to luminance threshold is defined as normal mode at brightness valueTime, synchronously control the pixel cell 111 interlacing exposures in each dot structure unit, and synchronously control each pixel knotIn structure unit, the selection signal driver of the pixel cell 111 of every row is sequentially worked, or, be less than luminance threshold at brightness valueWhile being defined as night scene mode, the selection signal of synchronously controlling the pixel cell 111 of the every row in each dot structure unit drivesMoving work, and the pixel cell 111 of synchronously controlling the every row in each dot structure unit exposes simultaneously simultaneously, and,The output of read pixel array 10, and according to definite exposal model, output is merged to obtain the picture of corresponding exposal modelPrime number certificate.
For example, cover the structure of 2*2 for each filter unit, in the time of normal mode, image processor 20 is synchronously controlledPixel cell 111 interlacing exposures in each described dot structure unit, and synchronously control in each dot structure unitFirst selects signal driver and second to select signal driver sequentially to work. In the time of night scene mode, image processor 20 synchronouslyControl first in each dot structure unit and select signal driver and second to select signal driver to work simultaneously, and control pixelThe pixel cell that 2i+1 is capable and 2i+2 is capable in array exposes simultaneously, and wherein, i is more than or equal to 0 integer.
The output of image processor 20 read pixel arrays, and according to definite exposal model to output merge to obtain rightAnswer the pixel data of exposal model. For example, for normal mode, the output of pel array 11 can be merged into normal BayerThe pixel data form of arranging, to ensure the rate respectively of high Pixel Dimensions; For clapping pattern night, can be by dot structure unitOutput merge to improve the sensitivity of taking pictures night.
The camera arrangement 100 of the embodiment of the present invention, each filter unit 121 of imageing sensor 10 covers multiple pixelsUnit 111, and in each dot structure unit, the pixel cell of same column adopts identical selection signal driver, colleague'sPixel cell adopts different selection signal drivers, provides hardware foundation, image processor 20 bases for realizing pixel switchingCurrent exposal model is controlled the selection signal driver of the pixel cell 111 in each dot structure unit, withAnd according to exposal model, output data processing is obtained pixel data that should exposal model, thereby can be at normal modeBetween formula and bat at night pattern, freely switch pixel, both can meet the definition that normal scene is taken pictures, can promote againThe effect of taking pictures under night scene, promotes picture quality.
Further, cover 2*2 pixel cell 111 as example taking each filter unit 121, output data are processedProcess describe.
In the time of normal mode, in the time of the capable exposure of 2i+1, image processor 20 difference read pixel arrays 11 are in the first selectionThe output in the time of the second selection signal driver work of output when signal driver work and pel array 11, is equivalent to read respectivelyThe pixel of corresponding PD1 and PD3 output in each dot structure unit, as shown in Figure 4 and Figure 5; In the time of the capable exposure of 2i+2,Output and the pel array 11 of read pixel array 11 in the time of the first selection signal driver work drives at the second selection signal respectivelyOutput while starting building to do, the pixel output that is equivalent to read corresponding PD2 and PD4 in each dot structure unit, as Fig. 6 andShown in Fig. 7. And image processor 20 is according to the pel array of the capable exposure of the 2i+1 reading and the capable exposure of 2i+211 output synthesizes to obtain the pixel data under normal mode, and wherein, i is more than or equal to 0 integer. SpecificallyGround, according to the output data of Fig. 4, Fig. 5, Fig. 6 and Fig. 7, and exports data and need to meet normal Bayer under normal modeSpread pattern, image processor 20 carries out data when synthetic, by output data as shown in Figure 4, Figure 5, Figure 6 and Figure 7Taking four adjacent respectively output valves as unit according to mode cross arrangement successively as shown in Figure 8, final synthetic data asShown in Fig. 9. Visible, obtain the pixel data form that normal Bayer is arranged, and ensured the resolution ratio of high Pixel Dimensions.
In the time of night scene mode, the output of image processor 20 read pixel arrays 11, and by the picture of same dot structure unitThe output of element unit 111 is added to obtain the pixel value of dot structure unit, and by the pixel value of all dot structures unitMerge to generate the pixel data under corresponding night scene mode, as shown in (1) in Figure 10 and (2).
Can find out, the pixel that the camera arrangement 100 of the embodiment of the present invention can be realized between normal mode and bat at night pattern is cutChange, thereby meet the current scene demand of taking pictures, promote picture quality.
Based on the explanation of above-mentioned aspect camera arrangement, further aspect of the present invention embodiment also proposes a kind of terminal. As shown in figure 12,This terminal 1000 comprises camera arrangement 100, and therefore, this terminal 1000 can be taken pictures, and can realize normal mode and nightPixel between bat pattern is switched, and meets the demand of the current scene of taking pictures, and promotes picture quality.
Particularly, terminal 1000 can include but not limited to mobile phone, camera.
Any process of otherwise describing in flow chart or at this or method are described and can be understood to, represent to comprise oneOr more for realizing module, fragment or the part of code of executable instruction of step of specific logical function or process,And the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to shown or discuss order,Comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be by of the present inventionEmbodiment person of ordinary skill in the field understands.
The logic and/or the step that in flow chart, represent or otherwise describe at this, for example, can be considered to for realityThe sequencing list of the executable instruction of existing logic function, may be embodied in any computer-readable medium, for instructionExecutive system, device or equipment (as computer based system, comprise that the system of processor or other can carry out from instructionSystem, device or equipment instruction fetch are also carried out the system of instruction) use, or in conjunction with these instruction execution systems, install or establishStandby and use. With regard to this description, " computer-readable medium " can be anyly can comprise, store, communicate by letter, propagateOr transmission procedure uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipmentDevice. The example more specifically (non-exhaustive list) of computer-readable medium comprises following: have one or more clothThe electrical connection section (electronic installation) of line, portable computer diskette box (magnetic device), random access memory (RAM), read-onlyMemory (ROM), the erasable read-only storage (EPROM or flash memory) of editing, fiber device, and portableCompact disc read-only memory (CDROM). In addition, computer-readable medium can be even the paper that can print described program thereonOr other suitable media, because can, for example by paper or other media are carried out to optical scanner, then edit, separateTranslate or process in electronics mode and obtain described program with other suitable methods if desired, be then stored in computerIn memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination. In above-mentioned realityExecute in mode, multiple steps or method can be with the software being stored in memory and carried out by suitable instruction execution system orFirmware is realized. For example, if realized with hardware, with the same in another embodiment, available well known in the art underAny one in row technology or their combination realize: have the logic gates for data-signal being realized to logic functionDiscrete logic, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), existingField programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is canComplete to carry out the hardware that instruction is relevant by program, described program can be stored in a kind of computer-readable recording medium,This program, in the time carrying out, comprises step of embodiment of the method one or a combination set of.
In description of the invention, the implication of " multiple " is at least two, for example two, and three etc., unless separately there is clear and definite toolThe restriction of body.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " specifically showExample " or the description of " some examples " etc. the specific features that means to describe in conjunction with this embodiment or example, structure, material orFeature is contained at least one embodiment of the present invention or example. In this manual, the schematic statement to above-mentioned termNot must for be identical embodiment or example. And specific features, structure, material or the feature of description canIn one or more embodiment in office or example with suitable mode combination. In addition, not conflicting in the situation that, abilityThe technical staff in territory can enter the feature of the different embodiment that describe in this description or example and different embodiment or exampleRow combination and combination.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary,Can not be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodimentChange, amendment, replacement and modification.
Claims (11)
1. a pixel changing method for imageing sensor, is characterized in that, described imageing sensor comprises pel array and establishesPut the filter array on described pel array, the each filter unit in described filter array covers in described pel arrayAdjacent multiple pixel cells also form dot structure unit, and in each dot structure unit, the pixel cell of same column is adoptedWith identical selection signal driver, colleague's pixel cell adopts different selection signal drivers, and described method comprises following stepRapid:
Obtain the brightness value of current scene;
Be defined as normal mode if described brightness value is more than or equal to luminance threshold, synchronously control each described pixel knotPixel cell interlacing in structure unit exposes, and synchronously controls the described pixel list of every row in each described dot structure unitThe selection signal driver of unit is sequentially worked; Or,
Be defined as night scene mode if described brightness value is less than described luminance threshold, synchronously control each described dot structureThe selection signal driver of the described pixel cell of the every row in unit is worked simultaneously, and synchronously controls each described dot structureThe described pixel cell of the every row in unit exposes simultaneously; And
Read the output of described pel array, and according to determine described exposal model described output is merged to obtain rightAnswer the pixel data of described exposal model.
2. pixel changing method as claimed in claim 1, is characterized in that, described each filter unit covers 2*2 instituteState pixel cell, and the described pixel cell employing first selection signal driver of the row of one in each described dot structure unit,The described pixel cell of another row adopts second to select signal driver, wherein,
In the time being described normal mode, synchronously control the pixel cell interlacing exposure in each described dot structure unit, andSynchronously controlling described first in each described dot structure unit selects signal driver and described second to select signal driver suitableThe work of order ground.
3. pixel changing method as claimed in claim 2, is characterized in that, described in read described pel array output,And according to definite exposal model, output is merged to obtain the pixel data of corresponding described exposal model, specifically comprise:
In the time of the capable exposure of 2i+1, read respectively described pel array described first select signal driver when work output andThe output of described pel array in the time that described second selects signal driver work, wherein, i is more than or equal to 0 integer;
In the time of the capable exposure of 2i+2, read respectively described pel array described first select signal driver when work output andThe output of described pel array in the time that described second selects signal driver work; And
The output of the described pel array during according to capable when exposure of the 2i+1 reading and the capable exposure of 2i+2 synthesizes to obtainObtain the pixel data under described normal mode.
4. pixel changing method as claimed in claim 2, is characterized in that, wherein,
In the time being described night scene mode, synchronously controlling described first in each described dot structure unit and select signal driverWork with described the second selection signal driver simultaneously; And
The 2i+1 described pixel cell capable and that 2i+2 is capable of controlling in described pel array exposes simultaneously, i for being greater than orEqual 0 integer.
5. pixel changing method as claimed in claim 4, is characterized in that, described in read described pel array output,And according to definite exposal model, output is merged to obtain the pixel data of corresponding described exposal model, specifically comprise:
Read the output of described pel array, and by the output of the described pixel cell of same described dot structure unit be added withObtain the pixel value of described dot structure unit; And
The pixel value of all described dot structures unit is merged to generate the pixel data under corresponding described night scene mode.
6. a camera arrangement, is characterized in that, comprising:
Imageing sensor, described imageing sensor comprises pel array and is arranged on the filter array on described pel array, instituteEach filter unit of stating in filter array covers multiple pixel cells and forms dot structure unit, and at each dot structureIn unit, the pixel cell of same column adopts identical selection signal driver, and colleague's pixel cell adopts different selection signalsDrive; With
Image processor, described image processor obtains the brightness value of current scene, is more than or equal to brightness at described brightness valueWhen threshold value is defined as normal mode, synchronously control the pixel cell interlacing exposure in each described dot structure unit, and withStep ground is controlled the selection signal driver of the described pixel cell of every row in each described dot structure unit and is sequentially worked, or,In the time that described brightness value is less than described luminance threshold and is defined as night scene mode, synchronously control in each described dot structure unitThe selection signal driver of described pixel cell of every row work simultaneously, and synchronously control in each described dot structure unitThe described pixel cell of every row expose simultaneously, and, the output of reading described pel array, and according to the described bat of determiningAccording to pattern, described output is merged to obtain the pixel data of corresponding described exposal model.
7. camera arrangement as claimed in claim 6, is characterized in that, described each filter unit covers 2*2 pixel listUnit, and the pixel cell of the row of one in each dot structure unit adopts first to select signal driver, the pixel cell of another rowAdopt second select signal driver, described image processor also for, in the time of described normal mode, synchronously control each instituteState pixel cell interlacing in dot structure unit exposure, and synchronously control described the in each described dot structure unitOne selects signal driver and described second to select signal driver sequentially to work.
8. camera arrangement as claimed in claim 7, is characterized in that, described image processor also for, at 2i+1When row exposure, read respectively output and the described pel array of described pel array in the time that described first selects signal driver workOutput in the time that described second selects signal driver work, in the time of the capable exposure of 2i+2, reads respectively described pel array in instituteState defeated in the time that described second selects signal driver work of the output in first selection signal driver when work and described pel arrayGo out, and, according to the output of the described pel array of the capable exposure of the 2i+1 reading and the capable exposure of 2i+2 synthesize withObtain the pixel data under described normal mode, wherein, i is more than or equal to 0 integer.
9. camera arrangement as claimed in claim 7, is characterized in that, described image processor also for, at described night sceneWhen pattern, synchronously control described first in each described dot structure unit and select signal driver and described second to select letterNumber drive and to work simultaneously, and control the pixel cell that 2i+1 is capable and 2i+2 is capable of the in described pel array and expose simultaneously,Wherein, i is more than or equal to 0 integer.
10. camera arrangement as claimed in claim 9, is characterized in that, described image processor also for, described in readingThe output of pel array, and the output of the described pixel cell of same described dot structure unit is added to obtain described pixelThe pixel value of construction unit, and the pixel value of all described dot structures unit is merged to generate corresponding described night scenePixel data under pattern.
11. 1 kinds of terminals, is characterized in that, comprise the camera arrangement as described in claim 6-10 any one.
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