CN209283387U - Intelligent zoom image sensor - Google Patents
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- CN209283387U CN209283387U CN201920182803.1U CN201920182803U CN209283387U CN 209283387 U CN209283387 U CN 209283387U CN 201920182803 U CN201920182803 U CN 201920182803U CN 209283387 U CN209283387 U CN 209283387U
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Abstract
The utility model provides a kind of imaging sensor of intelligent zoom, and described image sensor includes pixel array, and color filter array is set on the pixel unit of the pixel array and is optically coupled to the pixel unit;The peripheral circuit of described image sensor includes an image processing unit, and described image processing unit includes an intelligent zoom unit, control and the one or more target ROI of processing.Described image sensor exports two-path video picture signal, including low resolution full-view video image and high resolution video image simultaneously.The high-resolution target ROI image that the utility model imaging sensor is exported visually several times intelligence zoom in low resolution full-view video image output in corresponding ROI image, and export image pixel resolution ratio and signal-to-noise ratio be efficiently modified and improved.
Description
Technical field
The utility model relates to image processing techniques more particularly to a kind of intelligent zoom to improve image vision, mention simultaneously
Rise the imaging sensor of pixel resolution and signal-to-noise ratio.
Background technique
Cmos image sensor is applied to each field, such as monitors, security protection, a variety of applications such as intelligent transportation.With technology
Development and application demand, the size of imaging sensor is smaller and smaller, gradually develops to high integration and miniaturization.With
Pixel Dimensions become smaller, and the luminous flux of photosensitive-member also can be reduced accordingly.In the design, it will usually use and group is carried out to photosensitive pixel
The mode of (binning) is closed to improve photoinduction sensitivity, but the resolution ratio of this mode imaging sensor output pixel can drop
It is low.The resolution ratio and signal-to-noise ratio that black white image sensor has had, the resolution ratio for improving output pixel and signal-to-noise ratio are with further
Improve the performance of color image sensor.
In numerous applications, such as safety monitoring, pedestrian or vehicle monitoring system, real-time target detection and tracking very must
It wants.Existing computer vision algorithms make is all handled in back-end chip, and imaging sensor exports high resolution video image.It is many
Well known, the pixel quantity of imaging sensor is continuously increased in recent years, from VGA, 1Mp, 2Mp to 8Mp, 12Mp etc..With technology
Development and product renewing, specific purpose of the image sensor application in safety-security area of 50Mp can be had more than.If image sensing
Device can export the full-view video image of low resolution and high-resolution only comprising target ROI (region of
Interest, area-of-interest), the transmission bandwidth and design power consumption of entire monitoring or security system can be saved, it also can be further
Reduce the complexity of back-end chip processing.
The utility model is based on above-mentioned various problems, proposes a kind of new technic relization scheme, can effectively improve existing figure
As the resolution ratio and signal-to-noise ratio of sensor, while meeting the demand of imaging sensor output image more applied.
Summary of the invention
The utility model aim provides a kind of intelligent zoom image sensor, and described image sensor includes:
Pixel array, the pixel array are made of multiple pixel units being arranged in rows, output pixel signal;
Color filter array is set to above the pixel unit and is optically coupled to the pixel unit;And
Peripheral circuit is connected to the pixel array, is read out control to the picture element signal of pixel array output
And processing, the peripheral circuit include an image processing unit;
Described image processing unit includes an intelligent zoom unit, control and the one or more target ROI of processing;
Described image sensor passes through different MIPI (Mobile Industry Processor Interface, movement
Industry Processor Interface) virtual channel exports two-path video picture signal simultaneously, and it is low resolution full-view video image all the way;
Another way is the high resolution video image only comprising one or more target ROI;The high resolution video image that is exported and
The output frame rate of low resolution full-view video image can be identical, can also be difference according to application settings;
Described image sensor exports low resolution full-view video image by combination of pixels mode;Exported one or
Multiple target ROI are the high resolution video image for not using combination of pixels mode to export;One or more of target ROI are
The ROI of the fixed position or ROI of non-fixed position;
One or more target ROI ratios and size are cut out and define automatically to the intelligence zoom unit;
The intelligence zoom unit further includes tracking, and detection identifies one or more of target ROI, including tracking or
Detect the position of one or more target ROI;
The Pixel Dimensions of the high resolution video image comprising one or more target ROI of described image sensor output
SROI=N2×MROI, wherein N is intelligent zoom magnification, MROIFor the picture of ROI corresponding in the low resolution full-view video image
Plain size;
Optionally, the color filter array (CFA, color filter array) includes R (red), G (green), B
(indigo plant) optical filter, the color filter array include the minimum repetitive unit of multiple tiling settings, each minimum repetition
Unit is 2 × 2 Baeyer formats;
Optionally, the minimum repetitive unit of the multiple tiling setting is arranged with 6 × 6 formats, and output packed-pixel is
The low resolution full-view video image Pixel Dimensions of the mean value of four same pixels in Baeyer format array, output are high-resolution
The 1/9 of the Pixel Dimensions of the respective image of video image output, intelligent zoom magnification N=3;
Optionally, the minimum repetitive unit of the multiple tiling setting is arranged with 8 × 8 formats, the low resolution of output
Full-view video image Pixel Dimensions are the 1/16 of the Pixel Dimensions of the respective image of high resolution video image output, intelligent zoom
Multiple N=4;
Optionally, the color filter array includes red R, G, B optical filter and clear filter C (clear
Filter), the color filter array includes the minimum repetitive unit of multiple tiling settings, each minimum repetitive unit
1 B, G, G, R optical filter is respectively included, remaining is clear filter C;
Optionally, each minimum repetitive unit is arranged with 6 × 6 formats, and described 1 B, G, G, R are symmetrically arranged
In each minimum repetitive unit;B, mean value of G, G, R pixel respectively with 8 white pixels of its surrounding (clear pixel) is done
Correlation processing, resolution ratio and noise are improved, and the Pixel Dimensions of output are the 1/9 of former respective pixel size, and intelligence becomes
Burnt multiple N=3;
Optionally, each minimum repetitive unit is arranged with 8 × 8 formats, B, G, G, R pixel respectively with its surrounding
The mean value of 15 white pixels does correlation processing, and resolution ratio and noise are improved, and the Pixel Dimensions of output are former corresponding pictures
The 1/16 of plain size, intelligent zoom magnification N=4;
Optionally, each minimum repetitive unit is arranged with 8 × 8 formats comprising 2 B, G, G, R, remaining is
Bright optical filter C;B, G, G, R pixel are respectively the mean value of 2 corresponding B, G, G, R pixels, in its corresponding pixel unit position
The mean value of 14 white pixels does correlation processing;Its resolution ratio and noise are improved, and the Pixel Dimensions of output are former corresponding pictures
The 1/16 of plain size, intelligent zoom magnification N=4;
Optionally, each minimum repetitive unit is arranged with 8 × 8 formats comprising 3 B, G, G, R, remaining is
Bright optical filter C;B, G, G, R pixel are respectively the mean value of 3 corresponding B, G, G, R pixels, in its corresponding pixel unit position
The mean value of 13 white pixels does correlation processing;Its resolution ratio and noise are improved, and the Pixel Dimensions of output are former corresponding pictures
The 1/16 of plain size, intelligent zoom magnification N=4;
Optionally, each minimum repetitive unit is arranged with 8 × 8 formats comprising 4 R, G, G, B, remaining is
Bright optical filter C;B, G, G, R pixel are respectively the mean value of 4 corresponding B, G, G, R pixels, in its corresponding pixel unit position
The mean value of 12 white pixels does correlation processing;Its resolution ratio and noise are improved, and the Pixel Dimensions of output are former corresponding pictures
The 1/16 of plain size, intelligent zoom magnification N=4.
The utility model proposes intelligent zoom image sensor, while exporting two-path video picture signal low resolution
Full-view video image and high-resolution video image, the high resolution video image of output is one or more target ROI, high
More times of resolution goals ROI image intelligent zooms are in the corresponding ROI of the low-resolution video image.The utility model energy
It effectively promotes imaging sensor and exports image vision, while can realize that only ROI in image is tracked and identified or handled answers
With demand, the complexity of back-end system processing can be effectively reduced.The utility model provides a variety of color filter arrays simultaneously and sets
Set format, using insertion clear filter, add white pixel implementation effectively increase imaging sensor resolution ratio and
SNR (signal to noise ratio, signal-to-noise ratio).
Detailed description of the invention
Fig. 1 be the utility model proposes intelligent zoom image sensor basic structure block diagram;
Fig. 2A~2B is the utility model imaging sensor CFA with one schematic diagram of embodiment of 2 × 2 Baeyer formats;
Fig. 3 A~3B is that two schematic diagram of format embodiments is arranged in the utility model imaging sensor CFA;
Fig. 4 A~4F is that three schematic diagram of format embodiments is arranged in the utility model imaging sensor CFA;
Fig. 5 A~5B is that four schematic diagram of format embodiments is arranged in the utility model imaging sensor CFA;And
Fig. 6 A~6C is that five schematic diagram of format embodiments is arranged in the utility model imaging sensor CFA.
Specific embodiment
Below in conjunction with each attached drawing to the utility model proposes content carry out detailed implementation explanation.Fig. 1 is that this is practical
New Image sensor basic structure schematic diagram, as shown in fig. 1, imaging sensor 100 include pixel array 110 and right
The peripheral circuit that the picture element signal that pixel array 110 exports is controlled and handled.Color filter array CFA is set to pixel
On pixel unit in array 110, and it is optically coupled to each pixel unit in pixel array 110.Peripheral circuit includes row
Driving unit 120, column driving unit 130, logic control element 140, column A/D converting unit 150 and image processing unit 160.
The intelligent zoom unit 170 of setting one in image processing unit 160.The intelligent control of zoom unit 170 and the one or more mesh of processing
Mark ROI, automatic cutting (crop) and the one or more target ROI ratios of definition and size, including tracking, detection, and identification
One or more target ROI comprising tracking, detection or the position for identifying one or more target ROI.Intelligent zoom unit
170 processing one or more target ROI include the ROI that the ROI either non-fixed position of position is fixed in image, such as image
One or more target pedestrians or vehicle in picture.
Imaging sensor 100 is exported including two-way, wherein the full-view video image of 1 output low resolution of output all the way, separately
2 output of output all the way only includes high-resolution target ROI image, such as only exports the image frame of target pedestrian or vehicle,
It can be one or more target ROI.Imaging sensor 100 can export low resolution panorama by different MIPI virtual channels
Video image and high-resolution target ROI two-path video image, the output frame rate of two-path video image can be identical, can also not
Together, it can be set according to concrete application.Imaging sensor 100 exports low resolution panoramic video figure by the way of combination of pixels
Picture.The high resolution video image for one or more ROI that imaging sensor 100 exports directly is exported without combination of pixels
Image data., it can be achieved that the Pixel Dimensions S of high resolution video image ROI in various embodiments of the utility modelROI=N2×
MROI, N is intelligent zoom magnification, MROIFor the Pixel Dimensions of ROI corresponding in the full-view video image of low resolution.
Imaging sensor 100 can be provided with the color filter array of different-format according to application demand.Below in conjunction with
Each embodiment of color filter array and diagram, to the utility model proposes intelligent zoom image sensors to carry out specifically
It is bright.
Fig. 2A and 2B is the implementation that each minimum repetitive unit of the utility model imaging sensor CFA is 2 × 2 Baeyer formats
Example, to be arranged using 6 × 6 formats shown in Fig. 2A, wherein output low-resolution image pixel is P all the wayB=(PB1+PB3+PB13+
PB15)/4, PG=(PG4+PG6+PG31+PG3)/4, PG=(PG19+PG21+PG16+PG18)/4, PR=(PR22+PR24+PR34+PR36)/4。
The Pixel Dimensions exported after above-mentioned combination of pixels are the 1/9 of original pixel size, root when imaging sensor another output target ROI
Corresponding ROI pixel is not combined according to setting, therefore the high-resolution target ROI that imaging sensor is exported in the present embodiment
Image is exaggerated 3 times relative to ROI corresponding in low-resolution video image, and the ROI output of imaging sensor visually realizes
The image effect of 3 times of intelligent zoom.It is 8 × 8 that format, which is arranged, in CFA in Fig. 2 B, and pixel output is PB=(PB1*9+PB3*12+
PB5*3+PB17*12+PB19*16+PB21*4+ PB33*3+PB35*4+PB37* 1)/64, PG=(PG4*3+PG6*12+PG8*9+PG20*4+
PG22*16+ PG24*12+PG36*1+PG38*4+PG40* 3)/64, PG=(PG25*3+PG27*4+PG29*1+PG41*12+ PG43*16+
PG45*4+PG57*9+PG59*12+PG61* 3)/64 and PR=(PR28*1+PR30*4+PR32*3+PR44*4+PR46*16+PR48*12+
PR60*3+PR62*12+PR64* 9) the high-resolution target ROI image that/64, imaging sensor is exported in the present embodiment relative to
The corresponding ROI image of the low resolution output exported after combination of pixels is exaggerated 4 times, and imaging sensor can realize intelligent zoom 4
Image output effect again.
Fig. 3 A~3B is that embodiment two is arranged in the utility model imaging sensor CFA format, in the present embodiment, colour filter
Light device array includes red R, G, B optical filter and clear filter C, and color filter array includes the minimum weight of multiple tiling settings
Multiple unit, each minimum repetitive unit respectively include 1 B, G, G, R optical filter, remaining is clear filter C.Chromatic filter
The purpose of clear filter C is added in array is addition white pixel (clear pixel) in pixel unit, due to point of white pixel
Resolution is high and signal-to-noise ratio is good, can be effectively improved the resolution ratio and SNR of output pixel.As shown in fig. 3, each minimum repetition is single
Member is arranged with 6 × 6 formats, and B, G, G, R are symmetrically arranged in minimum repetitive unit.The low resolution of imaging sensor output
The pixel of video image is that 8 white pixel mean values of each pixel and its surrounding carry out relevant treatment.For example, the white picture of correlation of B pixel
Element is PC=(PC1+PC2+PC3+PC7+PC9+PC13+PC14+ PC15The calculating of)/8, rest of pixels is identical with implementation.Its pixel
Pixel Dimensions after combination are the 1/3*1/3=1/9 of original pixel size, and imaging sensor another way high differential ROI image is defeated
The high differential ROI for not setting the mode of combination out for pixel in pixel unit, therefore being able to achieve its output is that low resolution is defeated
Out in image 3 times of zoom of corresponding ROI intelligence image output effect.Fig. 3 B is that each minimum repetitive unit is set with 8 × 8 formats
It sets, it is identical as the implementation of scheme in Fig. 3 A, it is not both that the quantity of white pixel around each pixel increases to 15, each pixel point
Relevant treatment is not carried out with surrounding 15 white pixel mean values, to further increase the resolution ratio and signal-to-noise ratio of output pixel.
In 8 × 8 format plans of establishment that Fig. 3 B is provided, the high differential ROI for being able to achieve output is that low resolution exports phase in image
Answer the image output effect of 4 times of ROI intelligence zoom.
Fig. 4 A~4F is that embodiment three is arranged in the utility model imaging sensor CFA format, in the present embodiment, each most
Small repetitive unit respectively includes 2 B, G, G, R optical filters, remaining is clear filter C.As shown in Figure 4 A, output is low
Image in different resolution pixel is PB=(PB10+PB28)/2, PG=(PG14+PG32)/2, PG=(PG42+PG60)/2, PR=(PR46+
PR64)/2.For B pixel, relevant white pixel PC=(PC1+PC2+PC3+PC4+PC9+PC11+PC12+PC17+PC18+PC19+PC20+
PC25+PC26+PC27)/14, rest of pixels calculation are identical.The low-resolution video image that it is exported is corresponding to its by each pixel
White pixel value carry out relevant treatment, with improve output pixel resolution and noise.The high-resolution ROI video of another way
Image setting is not to the mode of the combination of pixels setting in its pixel unit.The height that imaging sensor is exported in the present embodiment
Resolution goals ROI image is exaggerated 4 times relative to corresponding ROI image in low resolution output, therefore imaging sensor is realized
The image output effect of 4 times of intelligent zoom.Other setting formats of CFA in the present embodiment, each minimum repetitive unit respectively include
2 B, G, G, R optical filters, it is different to be only arranged position, and format is specifically arranged respectively as shown in Fig. 4 B, 4C, 4D, 4E and 4F.
Concrete implementation mode is identical with Fig. 4 A embodiment in its each diagram, is no longer described in detail respectively to its each attached drawing, but every
Format is arranged in the column of the context of the utility model protection in CFA shown in one attached drawing.
Fig. 5 A and 5B are that example IV, in the present embodiment, each minimum is arranged in the utility model imaging sensor CFA format
Repetitive unit respectively includes 3 B, G, G, R optical filters, remaining is clear filter C.As shown in Figure 5 A, imaging sensor one
The low-resolution image pixel of road output is PB=(PB2+ PB17+PB19)/3, PG=(PG6+PG21+PG23)/3, PG=(PG34+PG49
+PG51)/3, PR=(PR38+PR53+PR55)/3.For B pixel, relevant white pixel is the mean value of 13 white pixels of surrounding,
That is PC=(PC1+PC3+PC4+PC9+PC10+PC11+PC12+PC18+PC20+PC25+PC26+PC27+PC28)/13, the calculating side of rest of pixels
Formula is identical.Based on the similar implementation of previous embodiment and identical realization purpose, imaging sensor institute is defeated in the present embodiment
High-resolution target ROI image out is exaggerated 4 times relative to corresponding ROI image in low resolution output, imaging sensor energy
Enough image output effects for realizing intelligent 4 times of zoom.
Fig. 6 A~6C is that example IV, in the present embodiment, each minimum is arranged in the utility model imaging sensor CFA format
Repetitive unit respectively includes 4 B, G, G, R optical filters, remaining is clear filter C.As shown in FIG, imaging sensor
The low-resolution image pixel exported all the way is PB=(PB3+PB9+ PB20+PB26The calculation of)/4, rest of pixels is identical, no
It separately describes again.The calculation for the white pixel being inserted into around it is PC=(PC1+PC2+PC4+PC10+PC11+PC12+PC17+PC18+
PC19+PC25+ PC27+PC28)/12, the corresponding white pixel calculation of rest of pixels are identical.Based on the similar reality of previous embodiment
Existing mode and identical realization purpose, the high-resolution target ROI image that imaging sensor is exported in the present embodiment relative to
Corresponding ROI image is exaggerated 4 times in low resolution output, therefore imaging sensor is able to achieve the image output of 4 times of intelligent zoom
Effect.
The imaging sensor in the various embodiments described above that the utility model provides is by being combined pixel and being arranged not
CFA with format can obtain the function that exported image visually realizes intelligent more times of zoom, intelligent zoom unit automatic shearing
Cut down and merge output target ROI, low resolution full-view video image and high resolution target ROI image can be exported simultaneously, while can effectively change
The resolution ratio and SNR of kind exported image.The utility model imaging sensor can be designed as multiple types according to application demand
Imaging sensor, such as FSI (front side illumination, front-illuminated) or BSI (back side
Illumination, back-illuminated type) imaging sensor, it can be according to used by application demand comprising DCG dual conversion gain electricity
The imaging sensor on road, or roll a plurality of types of imaging sensors of exposure or global exposure output.
Each examples and drawings that the utility model provides, be for illustrative purposes, without departing substantially from the utility model more
Under extensive spirit and scope, various forms of equivalent modifications are feasible.It can be practical new to this according to above-mentioned detailed description
Type embodiment is modified.For the term in claim should not be construed as limited to the utility model specific implementation content and
Disclosed specific embodiment in claim elements.On the contrary, range completely determining in claim should be interpreted that basis
Claim explains the statement of establishment.The specification of the utility model and each attached drawing should be considered as it is explanatory, rather than
It is constrained.
Claims (27)
1. a kind of intelligence zoom image sensor, described image sensor include:
Pixel array, the pixel array are made of multiple pixel units being arranged in rows, output pixel signal;
Color filter array is set to above the pixel unit and is optically coupled to the pixel unit;And
Peripheral circuit is connected to the pixel array, is read out control and place to the picture element signal of pixel array output
Reason, the peripheral circuit include an image processing unit;
It is characterized in that, described image processing unit includes an intelligent zoom unit, the intelligence zoom unit control and processing
One or more target ROI;The setting format of the color filter array and the combination of pixels mode of the pixel unit
Corresponding to the multiple of described image sensor intelligence zoom.
2. intelligence zoom image sensor according to claim 1, which is characterized in that described image sensor passes through difference
MIPI virtual channel simultaneously export two-path video picture signal, be low resolution full-view video image all the way;Another way is only to wrap
The output frame rate of high resolution video image containing one or more target ROI, the two-path video image is identical, or different.
3. intelligence zoom image sensor according to claim 2, which is characterized in that one or more of target ROI
The ROI of ROI or non-fixed position including fixed position.
4. intelligence zoom image sensor according to claim 1, which is characterized in that the intelligence zoom unit automatic shearing
Cut out and define the ratio and size of one or more target ROI.
5. intelligence zoom image sensor according to claim 4, which is characterized in that the intelligence zoom unit include with
Track, detection identify that one or more of target ROI, including tracking, detection identify the position of one or more target ROI.
6. intelligence zoom image sensor according to claim 1, which is characterized in that the one of described image sensor output
The Pixel Dimensions S of the high resolution video image of a or multiple target ROIROI=N2×MROI, wherein N is intelligent zoom magnification,
MROIFor the Pixel Dimensions of ROI corresponding in the low resolution full-view video image.
7. intelligence zoom image sensor according to claim 1, which is characterized in that the color filter array includes
R, G, B optical filter, the color filter array include the minimum repetitive unit of multiple tiling settings, each minimum repetition
Unit is 2 × 2 Baeyer formats.
8. intelligence zoom image sensor according to claim 7, which is characterized in that the color filter array is multiple
The minimum repetitive unit of tiling setting is arranged with 6 × 6 formats.
9. intelligence zoom image sensor according to claim 7, which is characterized in that the color filter array is multiple
The minimum repetitive unit of tiling setting is arranged with 8 × 8 formats.
10. intelligence zoom image sensor according to claim 1, which is characterized in that the color filter array packet
R, G, B and clear filter C are included, the color filter array includes the minimum repetitive unit of multiple tiling settings.
11. intelligence zoom image sensor according to claim 10, which is characterized in that the color filter array
Each minimum repetitive unit respectively includes 1 B, G, G, R, remaining is clear filter C.
12. intelligence zoom image sensor according to claim 11, which is characterized in that each minimum repetitive unit
With the setting of 6 × 6 formats are as follows:
13. intelligence zoom image sensor according to claim 11, which is characterized in that each minimum repetitive unit
With the setting of 8 × 8 formats are as follows:
14. intelligence zoom image sensor according to claim 10, which is characterized in that the color filter array
Each minimum repetitive unit is arranged with 8 × 8 formats, and each minimum repetitive unit includes 2 B, G, G, R, remaining is
Clear filter C.
15. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
16. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
17. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
18. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
19. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
20. intelligence zoom image sensor according to claim 14, which is characterized in that each minimum repetitive unit
Format are as follows:
21. intelligence zoom image sensor according to claim 10, which is characterized in that the color filter array
Each minimum repetitive unit is arranged with 8 × 8 formats, and each minimum repetitive unit includes 3 B, G, G, R, remaining is
Clear filter C.
22. intelligence zoom image sensor according to claim 21, which is characterized in that each minimum repetitive unit
Format are as follows:
23. intelligence zoom image sensor according to claim 21, which is characterized in that each minimum repetitive unit
Format are as follows:
24. intelligence zoom image sensor according to claim 10, which is characterized in that the color filter array
Each minimum repetitive unit is arranged with 8 × 8 formats, and each minimum repetitive unit includes 4 B, G, G, R, remaining is
Clear filter C.
25. intelligence zoom image sensor according to claim 24, which is characterized in that each minimum repetitive unit
Format are as follows:
26. intelligence zoom image sensor according to claim 24, which is characterized in that each minimum repetitive unit
Format are as follows:
27. intelligence zoom image sensor according to claim 24, which is characterized in that each minimum repetitive unit
Format are as follows:
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CN109587455A (en) * | 2019-02-01 | 2019-04-05 | 上海晔芯电子科技有限公司 | Intelligent zoom image sensor |
CN109587455B (en) * | 2019-02-01 | 2024-05-03 | 思特威(上海)电子科技股份有限公司 | Intelligent zooming image sensor |
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