CN107018339A - Imaging sensor, image processing method, image processing apparatus and electronic installation - Google Patents
Imaging sensor, image processing method, image processing apparatus and electronic installation Download PDFInfo
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- CN107018339A CN107018339A CN201710137957.4A CN201710137957A CN107018339A CN 107018339 A CN107018339 A CN 107018339A CN 201710137957 A CN201710137957 A CN 201710137957A CN 107018339 A CN107018339 A CN 107018339A
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- image processing
- photosensitive pixel
- brightness value
- brightness
- image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/702—SSIS architectures characterised by non-identical, non-equidistant or non-planar pixel layout
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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
- H04N23/80—Camera processing pipelines; Components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
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Abstract
The invention discloses a kind of imaging sensor.Most imaging sensors include sensitive pixel elements array, and sensitive pixel elements include the first photosensitive pixel and the second photosensitive pixel.First photosensitive pixel has the first sensitivity, and the second photosensitive pixel has the second sensitivity, and the second sensitivity is less than the first sensitivity.In addition, the invention also discloses a kind of image processing method, image processing apparatus and electronic installation for obtaining ambient brightness.The imaging sensor of the present invention, image processing method, image processing apparatus and the electronic installation of acquisition ambient brightness are using relatively low the second light-sensitive image usually measuring environment brightness of sensitivity, so as to result in accurate measurement effect under highlighted environment.
Description
Technical field
The present invention relates to imaging technique, more particularly to a kind of imaging sensor, image processing method, image processing apparatus and
Electronic installation.
Background technology
In order to ensure the acquisition capability of image, the sensitivity of the photosensitive pixel of imaging sensor is typically higher, highlighted
Easily there is signal saturation under environment, cause correctly obtain ambient brightness information.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.Therefore, embodiments of the invention are carried
A kind of imaging sensor, image processing method, image processing apparatus and electronic installation are supplied.
A kind of imaging sensor, described image sensor includes sensitive pixel elements array, the sensitive pixel elements bag
Include the first photosensitive pixel and the second photosensitive pixel.
First photosensitive pixel has the first sensitivity.
Second photosensitive pixel has the second sensitivity, and second sensitivity is less than first sensitivity.
A kind of image processing method for obtaining ambient brightness, the imaging device that described image sensor is included for handling is adopted
The scene image of collection, described image processing method comprises the following steps：
The scene image is handled to obtain corresponding first brightness value of first photosensitive pixel；
Judge whether first brightness value is more than luminance threshold；
It is photosensitive to obtain described second that the scene image is handled when first brightness value is more than the luminance threshold
Corresponding second brightness value of pixel；With
The ambient brightness is used as using second brightness value.
A kind of image processing apparatus for obtaining ambient brightness, the imaging device that described image sensor is included for handling is adopted
The scene image of collection, described image processing unit includes first processing module, judge module, Second processing module and the 3rd processing
Module.
The first processing module is used to handle the scene image to obtain first photosensitive pixel corresponding first
Brightness value.
The judge module is used to judge whether first brightness value is more than luminance threshold.
The Second processing module is used to handle the scene graph when first brightness value is more than the luminance threshold
As to obtain corresponding second brightness value of second photosensitive pixel.
3rd processing module is used to be used as the ambient brightness using second brightness value.
A kind of electronic installation includes imaging device and described image processing unit.
The imaging sensor of the present invention, image processing method, image processing apparatus and the electronic installation for obtaining ambient brightness
Using relatively low the second light-sensitive image usually measuring environment brightness of sensitivity, so as to be resulted under highlighted environment accurately
Measurement effect.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Obtain substantially and be readily appreciated that, wherein：
Fig. 1 is the structural representation of the imaging sensor of embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the image processing method of embodiment of the present invention；
Fig. 3 is the floor map of the electronic installation of embodiment of the present invention；
Fig. 4 is the schematic flow sheet of the image processing method of some embodiments of the invention；
Fig. 5 is the high-level schematic functional block diagram of the image processing apparatus of some embodiments of the invention；
Fig. 6 is the schematic flow sheet of the image processing method of some embodiments of the invention；
Fig. 7 is another high-level schematic functional block diagram of the image processing apparatus of some embodiments of the invention.
Main element symbol description：
Electronic installation 100, image processing apparatus 10, first processing module 11, judge module 12, Second processing module 13,
3rd processing module 14, fourth processing module 15, acquisition module 16, imaging device 20, imaging sensor 21, sensitive pixel elements
Array 212, sensitive pixel elements 212a, the first photosensitive pixel 2122, the second photosensitive pixel 2124.
Embodiment
Embodiments of the present invention are described below in detail, the embodiment of the embodiment is shown in the drawings, wherein
Same or similar label represents same or similar element or the element with same or like function from beginning to end.Lead to below
It is exemplary to cross the embodiment being described with reference to the drawings, and is only used for explaining the present invention, and it is not intended that to the limit of the present invention
System.
Referring to Fig. 1, the imaging sensor 21 of embodiment of the present invention includes sensitive pixel elements array 212, light-sensitive image
Plain unit 212a includes the first photosensitive pixel 2122 and the second photosensitive pixel 2124.First photosensitive pixel 2122 is sensitive with first
Degree.Second photosensitive pixel 2124 has the second sensitivity, and the second sensitivity is less than the first sensitivity.
Also referring to Fig. 2 and Fig. 3, the image processing method of the acquisition ambient brightness of embodiment of the present invention can be used for
Processing includes the scene image that the imaging device 20 of imaging sensor 21 is gathered.Image processing method comprises the following steps：
S11：Scene image is handled to obtain corresponding first brightness value of the first photosensitive pixel 2122；
S12：Judge whether the first brightness value is more than luminance threshold；
S13：Handle scene image to obtain the correspondence of the second photosensitive pixel 2124 when the first brightness value is more than luminance threshold
The second brightness value；With
S14：Ambient brightness is used as using the second brightness value.
Referring to Fig. 3, the image processing apparatus 10 of the acquisition ambient brightness of embodiment of the present invention can be used for place
Reason includes the scene image that the imaging device 20 of imaging sensor 21 is gathered.Image processing apparatus 10 includes first processing module
11st, judge module 12, the processing module 14 of Second processing module 13 and the 3rd.First processing module 11 be used for handle scene image with
Obtain corresponding first brightness value of the first photosensitive pixel 2122.Judge module 12 is used to judge whether the first brightness value is more than brightness
Threshold value.Second processing module 13 is used to handle scene image to obtain the second light-sensitive image when the first brightness value is more than luminance threshold
Plain 2124 corresponding second brightness values.3rd processing module 14 is used to be used as ambient brightness using the second brightness value.
In other words, the image processing method of embodiment of the present invention can be filled by the image procossing of embodiment of the present invention
10 realizations are put, wherein, step S11 can be realized by first processing module 11, and step S12 can be realized by judge module 12, step
Rapid S13 can be realized that step S14 can be realized by the 3rd processing module 14 by Second processing module 13.
In some embodiments, the image processing apparatus 10 of embodiment of the present invention can apply to embodiment party of the present invention
The electronic installation 100 of formula, in other words the electronic installation 100 of embodiment of the present invention can include the image of embodiment of the present invention
Processing unit 10.In addition, the electronic installation 100 of embodiment of the present invention also includes imaging device 20, imaging device 20 and image
Processing unit 10 is electrically connected.Imaging device 20 includes the imaging sensor 21 of embodiment of the present invention.
The imaging sensor 21 of the present invention, image processing method, image processing apparatus 10 and the electronics for obtaining ambient brightness
Device 100 using the second relatively low photosensitive pixel 2124 of sensitivity come measuring environment brightness, so as to can be obtained under highlighted environment
Obtain accurate measurement effect.
It is appreciated that acquisition capability of the imaging sensor 21 in order to ensure image, the photosensitive pixel typically used belongs to high
The photosensitive pixel of sensitivity, and highly sensitive photosensitive pixel easy overexposure under highlighted environment, so that true ring can not be obtained
The brightness value in border, therefore the brightness detection under highlighted environment can be usually realized using the light-sensitive image for increasing muting sensitivity.
In some embodiments, electronic installation 100 includes mobile phone, tablet personal computer, intelligent watch, notebook computer, intelligence
Can bracelet, intelligent glasses or intelligent helmet.In embodiments of the present invention, electronic installation 100 is mobile phone.
In some embodiments, imaging device 20 includes Front camera and/or rearmounted camera, does not do any limit herein
System.In embodiments of the present invention, imaging device 20 is Front camera.
In some embodiments, the ratio between number of the first photosensitive pixel 2122 and the second photosensitive pixel 2124 is located at 7-63
Between.
In this way, can both ensure the good picture acquisition power of imaging sensor 21, it is also ensured that in highlighted environment
Under luminance acquisition ability.
It is appreciated that the ability that imaging sensor 21 obtains image has the first photosensitive pixel 2122 to realize, highlighted environment
Luminance acquisition ability has the second photosensitive pixel 2124 to realize.In the number of the first photosensitive pixel 2122 and the second photosensitive pixel 2124
The ratio between when being less than 7, illustrate the number of the first photosensitive pixel 2122 very little, now the picture acquisition power of imaging sensor 21 is significantly
Weaken, so as to influence image quality；When the ratio between number of the first photosensitive pixel 2122 and the second photosensitive pixel 2124 is more than 63,
Illustrate the number of now the second photosensitive pixel 2124 very little, now luminance acquisition data of the imaging sensor 21 for highlighted environment
Very little, easily there is larger error.
In some embodiments, the ratio between number of the first photosensitive pixel 2122 and the second photosensitive pixel 2124 can be 7,
15th, 31 or 63, do not do any limitation herein.
Referring to Fig. 1, in one embodiment, the number of the first photosensitive pixel 2122 and the second photosensitive pixel 2124
The ratio between be 15, be that in a sensitive pixel elements 212a, the number of the first photosensitive pixel 2122 can be 15, the second sense
The number of light pixel 2124 can be one.
In some embodiments, the dynamic range of the second photosensitive pixel 2124 is more than the dynamic of the first photosensitive pixel 2122
Scope.
In this way, the second photosensitive pixel 2124 can be caused to be difficult overexposure under highlighted environment.
In some embodiment party, the second photosensitive pixel 2124 and the first photosensitive pixel 2122 have identical sensitivity, the
The input upper limit of two photosensitive pixels 2124 is than limit for height in the input of the first photosensitive pixel 2122.In this way, under highlighted environment, due to
The input upper limit of second photosensitive pixel 2124 is higher, can obtain more electric charges, it is not easy to signal saturated phenomenon occur, protects
The accuracy of ambient brightness acquisition is demonstrate,proved.
Referring to Fig. 4, in some embodiments, image processing method comprises the following steps：
S15：Ambient brightness is used as using the first brightness value when the first brightness value is less than or equal to luminance threshold.
Referring to Fig. 5, in some embodiments, image processing apparatus 10 includes fourth processing module 15.Fourth process
Module 15 is used to be used as ambient brightness using the first brightness value when the first brightness value is less than or equal to luminance threshold.
In other words, step S15 can be realized by fourth processing module 15.
In this way, ambient brightness than it is relatively low when, ambient brightness can be used as using the first brightness value.
It is appreciated that the brightness value of a sensitive pixel elements 212a all first photosensitive pixels 2122 can be obtained
Average value is used as the first brightness value, because the first brightness value is to calculate to obtain by multiple first photosensitive pixels 2122, Ke Yiti
The accuracy and reliability of high first brightness value.When the first brightness value is less than or equal to luminance threshold, illustrate now ambient brightness
Than relatively low, ambient brightness can be used as using the first brightness value.In addition, can be with using the high sensitivity of the first photosensitive pixel 2122
So that imaging sensor 21 more can accurately obtain ambient brightness under low-light environment.
Referring to Fig. 6, in some embodiments, image processing method comprises the following steps：
S16：The first brightness value for obtaining four adjacent the first photosensitive pixels 2122 of the second photosensitive pixel 2124 is averaged
It is worth the 3rd brightness value as the second photosensitive pixel 2124.
Referring to Fig. 7, in some embodiments, image processing apparatus 10 includes acquisition module 16.Acquisition module 16 is used
Second is used as in the average value for the first brightness value for obtaining four adjacent the first photosensitive pixels 2122 of the second photosensitive pixel 2124
3rd brightness value of photosensitive pixel 2124.
In other words, step S16 can be realized by acquisition module 16.
In this way, can by the first brightness value obtain more accurately the 3rd brightness value as image brightness of image value.
It is appreciated that because the sensitivity of the second photosensitive pixel 2124 is relatively low, causing the acquisition figure of the second photosensitive pixel 2124
The ability of picture is poor, so when carrying out image procossing, the second photosensitive pixel 2124 can be treated as into bad point, utilize compensating bad point
Method obtain the brightness value of the second photosensitive pixel 2124.
In some embodiments, the method for compensating bad point can also be its other party in addition to above-mentioned steps S16 method
Method.For example, obtaining the flat of the first brightness value of eight the first photosensitive pixels 2122 of 8 neighbor assignments of the second photosensitive pixel 2124
Average is used as the 3rd brightness value.Any limitation is not done herein.
In the description of embodiments of the present invention, term " first ", " second " are only used for describing purpose, without being understood that
To indicate or implying relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
One or more feature can be expressed or be implicitly included to the feature of " second ".In embodiments of the present invention
In description, " multiple " are meant that two or more, unless otherwise specifically defined.
, it is necessary to illustrate in the description of embodiments of the present invention, unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；It can be mechanical connection or electrical connection or can mutually communicate；Can be joined directly together, can also lead to
Cross intermediary to be indirectly connected to, can be connection or the interaction relationship of two elements of two element internals.For ability
For the those of ordinary skill in domain, it can understand that above-mentioned term in embodiments of the present invention specific contains as the case may be
Justice.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool with reference to the embodiment or example description
Body characteristicses, structure, material or feature are contained at least one embodiment of the present invention or example.In this manual,
Identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific features of description, knot
Structure, material or feature can in an appropriate manner be combined in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, represent to include
Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processing module or other can be from instruction
The system of execution system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission procedure uses for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With one or more wirings
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of embodiments of the present invention can be with hardware, software, firmware or combinations thereof come real
It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system
The software or firmware of execution is realized.If for example, being realized with hardware, with another embodiment, ability can be used
Any one of following technology known to domain or their combination are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
To be that unit is individually physically present, can also two or more units be integrated in a module.It is above-mentioned integrated
Module can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module
If being realized using in the form of software function module and as independent production marketing or in use, a calculating can also be stored in
In machine read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of imaging sensor, it is characterised in that described image sensor includes sensitive pixel elements array, the light-sensitive image
Plain unit includes：
First photosensitive pixel, first photosensitive pixel has the first sensitivity；With
Second photosensitive pixel, second photosensitive pixel has the second sensitivity, and second sensitivity is less than the described first spirit
Sensitivity.
2. imaging sensor as claimed in claim 1, it is characterised in that first photosensitive pixel and second light-sensitive image
The ratio between number of element is located between 7-63.
3. imaging sensor as claimed in claim 1, it is characterised in that the dynamic range of second photosensitive pixel is more than institute
State the dynamic range of the first photosensitive pixel.
4. a kind of image processing method for obtaining ambient brightness, includes as described in claim 1-3 any one for handling
The scene image of the imaging device collection of imaging sensor, it is characterised in that described image processing method comprises the following steps：
The scene image is handled to obtain corresponding first brightness value of first photosensitive pixel；
Judge whether first brightness value is more than luminance threshold；
Handle the scene image to obtain second photosensitive pixel when first brightness value is more than the luminance threshold
Corresponding second brightness value；With
The ambient brightness is used as using second brightness value.
5. image processing method as claimed in claim 4, it is characterised in that described image processing method comprises the following steps：
The ambient brightness is used as using first brightness value when first brightness value is less than or equal to the luminance threshold.
6. image processing method as claimed in claim 4, it is characterised in that described image processing method comprises the following steps：
The average value for obtaining first brightness value of four adjacent first photosensitive pixels of second photosensitive pixel is made
For the 3rd brightness value of second photosensitive pixel.
7. a kind of image processing apparatus for obtaining ambient brightness, includes as described in claim 1-3 any one for handling
The scene image of the imaging device collection of imaging sensor, it is characterised in that described image processing unit includes：
First processing module, the first processing module is used to handle the scene image to obtain first photosensitive pixel pair
The first brightness value answered；
Judge module, the judge module is used to judge whether first brightness value is more than luminance threshold；
Second processing module, the Second processing module is used to handle institute when first brightness value is more than the luminance threshold
Scene image is stated to obtain corresponding second brightness value of second photosensitive pixel；With
3rd processing module, the 3rd processing module is used to be used as the ambient brightness using second brightness value.
8. image processing apparatus as claimed in claim 7, it is characterised in that described image processing unit includes：
Fourth processing module, the fourth processing module is used to adopt when first brightness value is less than or equal to the luminance threshold
The ambient brightness is used as with first brightness value.
9. image processing apparatus as claimed in claim 7, it is characterised in that described image processing unit includes：
Acquisition module, the acquisition module is used to obtain four adjacent first photosensitive pixels of second photosensitive pixel
The average value of first brightness value as second photosensitive pixel the 3rd brightness value.
10. a kind of electronic installation, it is characterised in that including：
Imaging device；With
Image processing apparatus as described in claim 7-9 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710137957.4A CN107018339A (en) | 2017-03-09 | 2017-03-09 | Imaging sensor, image processing method, image processing apparatus and electronic installation |
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| CN201710137957.4A CN107018339A (en) | 2017-03-09 | 2017-03-09 | Imaging sensor, image processing method, image processing apparatus and electronic installation |
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Cited By (1)
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| CN111345032A (en) * | 2019-05-15 | 2020-06-26 | 合刃科技（深圳）有限公司 | Image sensor, light intensity sensing system and method |
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