CN101273621A - Internal memory of camera character during production - Google Patents
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- CN101273621A CN101273621A CN200580051719.7A CN200580051719A CN101273621A CN 101273621 A CN101273621 A CN 101273621A CN 200580051719 A CN200580051719 A CN 200580051719A CN 101273621 A CN101273621 A CN 101273621A
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Abstract
The specification and drawings present a new method, apparatus and software product for storing camera module characteristics of a camera module (or camera) of an electronic device provided during production (e.g., a factory testing) of the electronic device in a non-volatile memory of the camera module, such that the camera module characteristics are used by the electronic device for taking and processing images and/or identifying the camera module. The electronic device can be a wireless communication device, a portable electronic device, a camera, a camera-phone mobile device, etc.
Description
Technical field
Relate generally to video electronic devices of the present invention, and relate more specifically in production period storage camera module characteristics.
Background technology
Imageing sensor (or transducer) is the light-sensitive element in any digital camera.The core of transducer is the array of pixel.The output valve of each pixel is proportional with the energy that incides the light on the pixel, makes that transducer can output image.Can carry out color imaging by before each pixel, placing color filters.
Typically, transducer has nonideal characteristic: for example, and pixel even can produce output signal in the dark, pixel has limited capacity (becoming saturated), for all pixels, the relation between light energy and the output valve is also inequality, and pixel has different color responses.Also there is pixel with fixed value reaction.Introduce other parameter by placing optical system: further from the acutance of the image section of optical axis and the difference (vignetting) in the darkening grade in the transducer front.
Characteristic can be divided into time and spaces category.Time response is represented the attribute of each pixel, for example the time noise.Spatial character is represented the pixel differences in the given transducer.Transducer also can have sensor-specific parameters, and it comprises sequence number, manufacturing time and color matrices.Color matrices also is used for sensor color space changed into common/known color space, for example RGB.
The parameter that spatially changes in the pattern matrix and the problem of sensor-specific parameters can make image quality degradation.The phenomenon that spatially changes parameter is called as spatial noise.For all pixels of same transducer, sensor-specific parameters is normally identical, but for different transducers, sensor-specific parameters is different.Each pixel generates dark current, but generates with different speed: the difference between the different pixels can or even an order of magnitude.This is especially individual problem under light conditions.Because the noise that different dark current generating rates cause is called as dark signal heterogeneity (DSNU).Can be by using mechanical shutter and after taking every width of cloth image, taking spacer and come DSNU is compensated.This is impossible for the imaging device that does not have mechanical shutter or for the transducer setting that cannot use mechanical shutter (for example, in the production environment before imaging product is assembled).
Ratio between pixel output and the incident light energy also can be different for different pixels,, can think that pixel has different gains that is.This is especially individual problem under the optical condition of bright and appropriateness.The spatial noise of this type is called as photoresponse heterogeneity (PRNU).The representative value of PRNU is 1%=(average deviation/average pixel value) * 100%.Up to the present, also do not have to comprise programmable non-volatile memory so that memory has to reside at camera module inside so that can use the camera module (or imageing sensor) of calibration during factory testing.Therefore, the prior art compensation technique uses external memory storage and this also are why PRNU compensates the reason that be not widely used in the early time.
Because vignetting, even have uniform illumination, the absolute pixel output in the image turning can only be the 25%-50% of pixel output in the optical axis.This influence can partly be compensated by digital processing, but it is not carried out separately at each transducer.Also can be by coming vignetting is compensated to applying bigger gain away from the pixel of optical axis more, but it does not calculate at each camera module.
Because the fuzzy partly compensation by image being carried out sharpening usually that optics causes by digital processing.Yet compensation is not specific to transducer.Therefore, the image from two cameras of same model seems different.
Similarly, same color matrices has been used for all cameras of same model.Yet this causes the difference in the color, because camera is not calibrated individually.
Summary of the invention
According to a first aspect of the invention, a kind of method of camera module characteristics of the camera module that is used for store electrons equipment comprises: at production period, provide camera module characteristics, this camera module characteristics comprises following at least one:
A) at the pixel calibration data of the pixel of the imageing sensor of camera module,
B) sensor-specific parameters, and
C) delay of mechanical shutter; And
At production period, camera module characteristics is stored in the nonvolatile memory that is built in the camera module, make and to use this camera module characteristics to take and handle image or be used to discern camera module by electronic equipment.
Further according to a first aspect of the invention, pixel calibration data can comprise following at least one: dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration, and provide pixel calibration data may further comprise the steps: generate at the pixel of the imageing sensor of camera module and comprise following at least one pixel characteristic data: dark current characteristic, photoresponse heterogeneity characteristic and vignetting characteristic; And handle at least one item of these pixel characteristic data below generating respectively: dark current calibration, the calibration of photoresponse heterogeneity and vignetting are calibrated.In addition, generate other pixel characteristic data by electronic equipment each pixel at imageing sensor during photographic images, these other pixel characteristic data can comprise following at least one: other dark current characteristic, other photocurrent characteristics and other vignetting characteristic; Handle these other pixel characteristic data to generate other pixel calibration data by electronic equipment; And this other pixel calibration data is stored in the nonvolatile memory, makes other pixel calibration data can be used for proofreading and correct and use the captured other image of imageing sensor by electronic equipment.In addition, can be according to the standard of selecting in advance, provide current dark current characteristic data at the different operating condition of camera module.In addition, different operating conditions can be different temperature or different time for exposure.In addition, can use apart from image different distance or use and comprise that the diverse location of the optics of the focusing optical assembly that is placed on the imageing sensor front provides the vignetting performance data.
In addition according to a first aspect of the invention, the camera module characteristics that is stored in the nonvolatile memory at production period can comprise following at least one in addition:
A) camera module identification,
B) build date,
C) color correction matrix of imageing sensor and
D) image sharpening.
Still according to a first aspect of the invention, with the electronic equipment photographic images time, postpone to can be used for regulating the timing of shutter.In addition, the present invention can may further comprise the steps: the other delay of record mechanical shutter and this other delay is stored in the nonvolatile memory during photographic images, make that this other delay can be used for regulating the timing of shutter when taking other image with electronic equipment.
In addition according to a first aspect of the invention, imageing sensor and nonvolatile memory can be integrated in the integrated circuit.
Still according to a first aspect of the invention, this method can comprise step: use imageing sensor to generate vision signal from the video image of expectation; And using the calibration data to handle vision signal in addition so that correcting video signal and generate calibrated vision signal, wherein said calibration data is to use the pixel selection of predetermined standard from be stored in nonvolatile memory.
Still according to a first aspect of the invention, this method can comprise step: the calibrated vision signal of storage in other memory.
According to a second aspect of the invention, a kind of computer program, comprise: the computer-readable storage organization, comprise the computer program code that is used for by the computer processor execution on it, this computer program code is characterised in that it comprises the instruction that is used to carry out the step that is designated as a first aspect of the present invention of being carried out by any assembly of electronic equipment.
According to a third aspect of the invention we, a kind of electronic equipment comprises: camera module, and it comprises imageing sensor; Processing block, be used for production period provide comprise below at least one camera module characteristics:
A) at the pixel calibration data of the pixel of the imageing sensor of camera module,
B) sensor-specific parameters, and
C) delay of mechanical shutter; And
Nonvolatile memory is used in production period storage camera module characteristics, makes to be used this camera module characteristics to take and handle image or be used to discern camera module by electronic equipment, and wherein this nonvolatile memory is built in the camera module.
In addition according to a third aspect of the invention we, camera module can comprise processing block.
In addition according to a third aspect of the invention we, pixel calibration data can comprise following at least one: dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration, and provide pixel calibration data to comprise: at the pixel of the imageing sensor of camera module, use imageing sensor to generate the pixel characteristic data, these pixel characteristic data comprise: dark current characteristic, photoresponse heterogeneity characteristic and vignetting characteristic; And handle these pixel characteristic data at least one below generating respectively: dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration by processing block.
In addition according to a third aspect of the invention we, the camera module characteristics that is stored in the nonvolatile memory at production period can comprise following at least one in addition:
A) camera module identification,
B) build date,
C) color correction matrix of imageing sensor and
D) image sharpening.
Still according to a third aspect of the invention we, when with the electronic equipment photographic images, postpone to can be used for regulating the timing of shutter.
Still according to a third aspect of the invention we, imageing sensor and nonvolatile memory can be integrated in the integrated circuit.
Still according to a third aspect of the invention we, use imageing sensor to generate vision signal from the video image of expectation; And in addition using calibration data to handle vision signal so that correcting video signal and generate calibrated vision signal by processing block, wherein said calibration data is to use the pixel calibration data of predetermined standard from be stored in nonvolatile memory to select.
Still according to a third aspect of the invention we, electronic equipment can be Wireless Telecom Equipment, portable electric appts, camera or camera-phone mobile device.
According to a forth aspect of the invention, a kind of integrated circuit can comprise: imageing sensor; Nonvolatile memory, be used in production period storage camera module characteristics, make camera module characteristics be used to use imageing sensor to take and handle image, wherein camera module characteristics comprises pixel calibration data, and these data comprise at least at the dark current calibration of the pixel of imageing sensor, the calibration of photoresponse heterogeneity and vignetting calibration.
Description of drawings
Fig. 1 is the block diagram of electronic equipment according to the embodiment of the present invention, and this electronic equipment is used for the pixel calibration data at the imageing sensor of production period store electrons equipment, so that use imageing sensor to proofread and correct the image of being taken by electronic equipment in addition; And
Fig. 2 is a flow chart according to the embodiment of the present invention, and it shows the calibration and the image shoot process of electronic equipment, wherein in production period storage camera module characteristics.
Embodiment
A kind of new method, equipment and software product are provided, being used for will be at the electronic equipment production period (for example, the camera module characteristics of the camera module of the electronic equipment that factory testing) provides (or camera) is stored in the nonvolatile memory of camera module, makes to use this camera module characteristics to take and handle image according to the embodiment of the present invention by electronic equipment.Electronic equipment can be Wireless Telecom Equipment, portable electric appts, camera, camera-phone mobile device etc.
According to an embodiment of the invention, camera module characteristics can comprise the pixel calibration data at the pixel of the imageing sensor of camera module.Pixel calibration data includes, but is not limited to dark current calibration, the calibration of photoresponse heterogeneity and/or vignetting calibration at least.
According to other execution mode of the present invention, provide pixel calibration data to comprise: at all pixels of imageing sensor, use imageing sensor to generate the pixel characteristic data, these pixel characteristic data comprise dark current characteristic, photoresponse heterogeneity characteristic and/or vignetting characteristic; And or (promptly by the processing block of electronic equipment by the processing block of camera module, the processing block of camera module can be incorporated in the processing block of electronic equipment) the pixel characteristic data are used to generate pixel calibration data (for example, being respectively dark current calibration, the calibration of photoresponse heterogeneity and/or vignetting calibration).
According to an embodiment of the invention, can upgrade by (using aforesaid generation and processing) other pixel calibration data being provided during photographic images and it being stored in the nonvolatile memory in the pixel calibration data of production period storage, make other pixel calibration data can be used for proofreading and correct and use the captured other image of imageing sensor by electronic equipment.
In addition, according to the embodiment of the present invention, camera module characteristics can be a sensor-specific parameters, and it can be stored in the nonvolatile memory at the production period of electronic equipment.These sensor-specific parameters can include, but is not limited to: a) camera module identification, sequence number for example, it can be the binary value of 64 bits or 32 bits, b) build date, 32 bit numbers for example, its statement is from the second number of given reference time, the c) color correction matrix of imageing sensor, and/or d) image sharpening.Color matrices can be the 3x3 matrix, and this matrix for example can generate by the test pattern of taking known target color during production test and the offset that calculates color matrices based on the difference of color of regenerating and ideal color.In addition, the image that is generated by focusing optics can not be in sharpening and change between each camera module owing to make tolerance limit equably on the image-region.In order to overcome this problem, can and be then used in sharpening in the specific image sharpening data of production period memory module by the captured image of camera module.The two all is used in this camera module of production back tracking build date/time and sequence number.
In addition, according to the embodiment of the present invention, can comprise the delay of mechanical shutter in addition in the camera module characteristics of production period storage, wherein this delay can be used for the timing of adjusting shutter when with the electronic equipment photographic images.Can calibrate this delay during photographic images again: the other delay of mechanical shutter can be recorded and be stored in the nonvolatile memory, make that when electronic equipment is taken other image delay in addition (and not being the initial delay that writes down at production period) can alternatively be used to regulate the timing of shutter.
In addition, according to the embodiment of the present invention, imageing sensor and nonvolatile memory can be integrated in (for example, sensor chip) in the integrated circuit.Integrated memory solution has realized little system dimension.It has also realized storing camera module characteristics during production test.When characterization camera module during factory testing, can store each parameter and can obtain the better pictures quality at each module.Imageing sensor can use any available technology, for example complementary metal oxide semiconductors (CMOS) (CMOS) imaging array, CCD or similar techniques.Nonvolatile memory can use available manufacture method, includes but not limited to use CMOS logical process, flash memory technology etc.Memory manufacturing in the standard commercial CMOS logical process allows itself and cmos image sensor to integrate.
According to the embodiment of the present invention, can be according to the standard of selecting in advance, provide the dark current characteristic data at the different operating condition (for example different temperature or different time for exposure) of camera module.In addition, can use the diverse location (for example, if used the optics that moves) that comprises focusing optical assembly (being placed on the imageing sensor front) apart from the different distance or the use of image that the vignetting performance data is provided.
According to other execution mode of the present invention, when the video image that uses imageing sensor from expectation generates vision signal, use the calibration data to handle vision signal in addition so that correcting video signal and generate calibrated vision signal, wherein calibration data is to use the pixel calibration data selection of predetermined standard from be stored in nonvolatile memory.Calibrated vision signal can optionally be stored in the external memory storage or be forwarded to the destination of expectation.
Fig. 1 illustrates the example of the block diagram of electronic equipment 10 according to the embodiment of the present invention, and it is used in the pixel calibration data of the imageing sensor 14 of production period store electrons equipment 10 using the captured image of described imageing sensor 14 so that proofread and correct in addition by electronic equipment 10.
At production period, imageing sensor 14 can generate the pixel characteristic data at the pixel of imageing sensor 14, and these pixel characteristic data comprise dark current characteristic data, photoresponse-heterogeneity performance data and/or vignetting performance data.The pixel characteristic data by piece 16 (for example, use image compensation computing block 16a) handle (for example to generate pixel calibration data, be respectively dark current calibration, photoresponse-heterogeneity calibration and/or vignetting calibration), this pixel calibration data then is stored in the nonvolatile memory 18.
Camera module characteristics as sensor-specific parameters, for example the build date and/or the color correction matrix of camera module 12 signs (for example sequence number), imageing sensor 14 can also be stored in the nonvolatile memory 18 at the production period of electronic equipment 10.Also can be in the production period record of nonvolatile memory 18 and the delay of store mechanical shutter (not shown in figure 1), wherein when with electronic equipment 10 photographic images, this delay can be used for regulating the timing of shutter.Describe in detail above about generating the delay of pixel calibration data, camera module characteristics and mechanical shutter.
When the video image 11 that uses imageing sensor 14 from expectation generates vision signal 30, use calibration data to handle vision signal 30 in addition with correcting video signal 30 and the calibrated vision signal 34 of generation by piece 16 (or piece 16a), wherein said calibration data is to use the pixel calibration data of predetermined standard from be stored in nonvolatile memory 18 to select.Calibrated vision signal 34 can optionally be stored in the device memory 20 (or external memory storage) or be forwarded to the destination of expectation by I/O port 22.
Fig. 2 illustrates the example of flow chart according to the embodiment of the present invention, and calibration and photographic images process that it shows electronic equipment 10 wherein are stored in camera module characteristics in the nonvolatile memory 18 at production period.
The flow chart of Fig. 2 is only represented wherein a kind of possible scheme.In method according to an embodiment of the invention, in first step 40, as above about the description of Fig. 1, provide camera module characteristics (for example, pixel calibration data, mechanical shutter delay, sensor-specific parameters etc.) at the production period of electronic equipment 10.According to the embodiment of the present invention, pixel calibration data (for example can include but not limited to dark current calibration, at different temperature and operating condition), photoresponse heterogeneity calibration, vignetting calibration (for example, at different optics positions and image distance) etc.In addition, sensor-specific parameters can include, but is not limited to color correction matrix, image sharpening of camera module identification, build date, imageing sensor etc.In next step 42, the camera module characteristics that is provided is stored (at production period, for example test) in nonvolatile memory 18.
According to the embodiment of the present invention, in next step 44, generate vision signals 30 from the video image of expecting 11 by the imageing sensor 14 that may use the mechanical shutter delay that is stored in the nonvolatile memory 18.In next step 46, correcting video signal 30 and calibrated vision signal 34 offered device memory 20 (or external memory storage) or be forwarded to the destination of expectation by I/O port 22 in processing block 16.In the end in the step 48, if desired, then use camera module identification (for example, sequence number) to follow the trail of (, then can discern equipment) with this problem if for example have problems aborning.
As mentioned above, the invention provides method and corresponding apparatus, this corresponding apparatus comprises the functional various modules of the step that this method of execution is provided.Module may be implemented as hardware, perhaps may be embodied as software or the firmware carried out by computer processor.Especially, under the situation of firmware or software, the present invention may be provided in computer program, and this computer program comprises the computer-readable storage organization, comprise the computer program code of carrying out by computer processor (that is, software or firmware) on this computer-readable storage organization.
Will appreciate that above-mentioned setting only is the example of the application of principle of the present invention.Under the prerequisite that does not depart from scope of the present invention, those skilled in the art can design multiple modification and optional setting, and appended claims is intended to cover such modification and setting.
Claims (22)
1. the method for the camera module characteristics of a camera module (12) that is used for store electrons equipment (10) comprising:
At production period, (40) described camera module characteristics is provided, this camera module characteristics comprises following at least one:
A) at the pixel calibration data of the pixel of the imageing sensor (14) of described camera module (12),
B) sensor-specific parameters, and
C) delay of mechanical shutter; And
At described production period, in described camera module characteristics storage (42) nonvolatile memory (18) in being built in described camera module (12), make to be used for shooting and processing image or to be used to discern described camera module by the described camera module characteristics of this electronic equipment (10) use.
2. method according to claim 1, wherein said pixel calibration data comprise following at least one: dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration, and describedly provide described pixel calibration data to comprise step:
Described pixel at the described imageing sensor (14) of described camera module (12) generates the pixel characteristic data, described pixel characteristic data comprise described below at least one: dark current characteristic, photoresponse heterogeneity characteristic and vignetting characteristic; And
Handle at least one item of described pixel characteristic data below generating respectively: dark current calibration, the calibration of photoresponse heterogeneity characteristic and vignetting calibration.
3. method according to claim 2 comprises step in addition:
Generate other pixel characteristic data by described electronic equipment (10) each pixel at described imageing sensor (14) during the described image of described shooting, described other pixel characteristic data comprise following at least one: other dark current characteristic, other photocurrent characteristics and other vignetting characteristic;
Handle described other pixel characteristic data to generate other pixel calibration data by described electronic equipment (10); And
Described other pixel calibration data is stored in the described nonvolatile memory (18), makes described other pixel calibration data be used for proofreading and correct and use the captured other image of described imageing sensor (14) by described electronic equipment (10).
4. method according to claim 2 wherein according to the standard of selecting in advance, provides current dark current characteristic data at the different operating condition of camera module (12).
5. method according to claim 4, wherein said different operating condition are different temperature or different time for exposure.
6. method according to claim 2 is wherein used apart from image different distance or use to comprise that the diverse location of the optics of the focusing optical assembly that is placed on described imageing sensor (14) front provides described vignetting performance data.
7. method according to claim 1, wherein the described camera module characteristics that is stored in the described nonvolatile memory (18) at described production period can comprise following at least one in addition:
A) camera module identification,
B) build date,
C) color correction matrix of imageing sensor and
D) image sharpening.
8. method according to claim 1, wherein when taking described image with described electronic equipment (10), described delay is used to regulate the timing of shutter.
9. method according to claim 8 wherein comprises step in addition:
During the described image of described shooting, the other delay of record mechanical shutter and described other delay is stored in the described nonvolatile memory (18), make that described other delay is used to regulate the timing of described shutter when taking other image with described electronic equipment (10).
10. method according to claim 1, wherein said imageing sensor (14) and described nonvolatile memory (18) are integrated in the integrated circuit (15).
11. method according to claim 1 comprises step in addition:
Use described imageing sensor (14) to generate vision signal from the video image of expectation; And
Use calibration data to handle described vision signal in addition so that proofread and correct described vision signal (30) and generate calibrated vision signal (34), wherein calibration data is to use the described pixel calibration data of predetermined standard from be stored in described nonvolatile memory (18) to select.
12. method according to claim 11 comprises step in addition:
The described calibrated vision signal of storage in other memory (20).
13. computer program, comprise: the computer-readable storage organization, comprise computer program code on it, be used for being carried out by the computer processor with described computer program code, this computer program code is characterised in that it comprises the instruction that is used to carry out the step that is designated as the method for being carried out by any assembly of described electronic equipment according to claim 1.
14. an electronic equipment (10) comprising:
Camera module (12), it comprises imageing sensor (14);
Processing block (16) is used for providing camera module characteristics at production period, and described camera module characteristics comprises following at least one:
A) at the pixel calibration data of the pixel of the imageing sensor (14) of described camera module (12),
B) sensor-specific parameters, and
C) delay of mechanical shutter; And
Nonvolatile memory (18), be used for storing described camera module characteristics at production period, make to be used for shooting and processing image or to be used to discern described camera module that wherein said nonvolatile memory (18) is built in the camera module (12) by the described camera module characteristics of described electronic equipment (10) use.
15. electronic equipment according to claim 14, wherein said camera module comprise processing block (16).
16. electronic equipment according to claim 14, wherein said pixel calibration data comprise following at least one: dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration, and describedly provide described pixel calibration data to comprise:
At the described pixel of the described imageing sensor (14) of described camera module (12), use described imageing sensor (14) to generate the pixel characteristic data, described pixel characteristic data comprise: dark current characteristic, photoresponse heterogeneity characteristic and vignetting characteristic; And
Handle at least one item of described pixel characteristic data below generating respectively by described processing block (16): dark current calibration, the calibration of photoresponse heterogeneity and vignetting calibration.
17. electronic equipment according to claim 14, wherein the described camera module characteristics that is stored in the nonvolatile memory (18) at described production period comprises following at least one in addition:
A) camera module identification,
B) build date,
C) color correction matrix of imageing sensor and
D) image sharpening.
18. electronic equipment according to claim 14, wherein when taking described image with described electronic equipment (10), described delay is used to regulate the timing of described shutter.
19. electronic equipment according to claim 14, wherein said imageing sensor (14) and described nonvolatile memory (18) are integrated in the integrated circuit (15).
20. electronic equipment according to claim 14, wherein
Use described imageing sensor (14) to generate vision signal from the video image of expectation; And the described vision signal of processing is so that proofread and correct described vision signal (30) and generate calibrated vision signal (34) in addition to use calibration data by processing block (16), and wherein said calibration data is to use the described pixel calibration data of predetermined standard from be stored in described nonvolatile memory (18) to select.
21. electronic equipment according to claim 14, wherein said electronic equipment (10) are Wireless Telecom Equipment, portable electric appts, camera or camera-phone mobile devices.
22. an integrated circuit (15) comprising:
Imageing sensor (14);
Nonvolatile memory (18) is used for making described camera module characteristics be used to use described imageing sensor (14) to take and handle image, wherein in described production period storage camera module characteristics
Described camera module characteristics comprises pixel calibration data, and described data comprise at least at the dark current calibration of the pixel of described imageing sensor (14), the calibration of photoresponse heterogeneity and vignetting calibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200580051719.7A CN101273621A (en) | 2005-09-28 | 2005-09-28 | Internal memory of camera character during production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200580051719.7A CN101273621A (en) | 2005-09-28 | 2005-09-28 | Internal memory of camera character during production |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102342089A (en) * | 2009-03-02 | 2012-02-01 | 弗莱克斯电子有限责任公司 | Calibration techniques for camera modules |
| CN103813101A (en) * | 2014-02-18 | 2014-05-21 | 青岛海信移动通信技术股份有限公司 | Camera starting method applied to terminal and terminal |
| WO2015000441A1 (en) * | 2013-07-05 | 2015-01-08 | Mediatek Inc. | On-line stereo camera calibration device and method for generating stereo camera parameters |
| CN105393529A (en) * | 2013-09-03 | 2016-03-09 | 意法半导体(R&D)有限公司 | An optical module and method |
| CN110896452A (en) * | 2018-09-13 | 2020-03-20 | 奇酷互联网络科技（深圳）有限公司 | Flash lamp correction method of mobile terminal, mobile terminal and device |
| WO2022099696A1 (en) * | 2020-11-16 | 2022-05-19 | 华为技术有限公司 | Camera identification method, camera authentication method and system, and terminal |
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2005
- 2005-09-28 CN CN200580051719.7A patent/CN101273621A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102342089A (en) * | 2009-03-02 | 2012-02-01 | 弗莱克斯电子有限责任公司 | Calibration techniques for camera modules |
| US9955142B2 (en) | 2013-07-05 | 2018-04-24 | Mediatek Inc. | On-line stereo camera calibration device and method for generating stereo camera parameters |
| US10033989B2 (en) | 2013-07-05 | 2018-07-24 | Mediatek Inc. | Synchronization controller for multi-sensor camera device and related synchronization method |
| WO2015000441A1 (en) * | 2013-07-05 | 2015-01-08 | Mediatek Inc. | On-line stereo camera calibration device and method for generating stereo camera parameters |
| CN105556960A (en) * | 2013-07-05 | 2016-05-04 | 联发科技股份有限公司 | Synchronization controller for multi-sensor camera device and related synchronization method |
| CN105556960B (en) * | 2013-07-05 | 2018-03-06 | 联发科技股份有限公司 | Active stereo means for correcting and the method for producing stereo parameter |
| CN105393529A (en) * | 2013-09-03 | 2016-03-09 | 意法半导体(R&D)有限公司 | An optical module and method |
| CN105393529B (en) * | 2013-09-03 | 2019-05-28 | 意法半导体(R&D)有限公司 | Optical module and method |
| CN103813101A (en) * | 2014-02-18 | 2014-05-21 | 青岛海信移动通信技术股份有限公司 | Camera starting method applied to terminal and terminal |
| CN103813101B (en) * | 2014-02-18 | 2019-03-08 | 青岛海信移动通信技术股份有限公司 | Camera starting method and terminal in a kind of terminal |
| CN109618101A (en) * | 2014-02-18 | 2019-04-12 | 青岛海信移动通信技术股份有限公司 | Camera starting method and terminal in a kind of terminal |
| CN110896452A (en) * | 2018-09-13 | 2020-03-20 | 奇酷互联网络科技（深圳）有限公司 | Flash lamp correction method of mobile terminal, mobile terminal and device |
| WO2022099696A1 (en) * | 2020-11-16 | 2022-05-19 | 华为技术有限公司 | Camera identification method, camera authentication method and system, and terminal |
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Application publication date: 20080924 |