CN1805551A - Simple method of implementing image acquisition in wide dynamic range with multiple cameras - Google Patents
Simple method of implementing image acquisition in wide dynamic range with multiple cameras Download PDFInfo
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- CN1805551A CN1805551A CN 200510001909 CN200510001909A CN1805551A CN 1805551 A CN1805551 A CN 1805551A CN 200510001909 CN200510001909 CN 200510001909 CN 200510001909 A CN200510001909 A CN 200510001909A CN 1805551 A CN1805551 A CN 1805551A
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Abstract
The invention relates to a method for using several cameras to realize the image collection with wide dynamic range to replace sing camera with wide dynamic range to collect the image. The invention has lower cost and simple operation. The invention is characterized in that: according to the luminance of shot object and the demand for view effect, using several cameras and several filters to shoot one object and integrate the shot images via computer to realize the image collection with wide dynamic range. The invention can flexibly select the types and number of cameras and filters to meet different demand.
Description
Technical field
The present invention relates to a kind of multi-cam and realize the simple and easy method of image acquisition in wide dynamic range.
Background technology
In recent years, along with the development of Computer Multimedia Technology, some associated electrical products arise at the historic moment, camera for example commonly used now.Link by camera and computer, can carry out network visual telephone, Video show, IMAQ easily.
In carrying out image acquisition process, because the sensitization strength range of camera head sensor devices is limited, if image being shot comprises bright areas and simultaneously than dark areas, traditional bias light compensation technology can only make the aperture of camera lens that the part of object darkness is adjusted, and district being shot light is because the aperture increase causes over-exposed, image turns white, and loses details, thereby causes shooting effect undesirable; Otherwise, will being shotly help black than dark areas.Therefore the power of background illumination becomes a difficult problem that presses for solution to the interference of subject.To the camera of commonly using, the aperture adjustable extent is very limited, so that the requirement to background illumination is quite harsh when IMAQ, and has the camera of dynamic range than broad now, because the raising of technical difficulty and technological requirement, cost is higher.How can realize becoming the IMAQ of illuminance wide dynamic range with the lower and simple and easy to do method of cost, cause people's extensive thinking.
Summary of the invention
At the problems referred to above, the present invention proposes the simple and easy method that a kind of multi-cam is realized image acquisition in wide dynamic range, purpose is to utilize the combination of a plurality of cameras and some filtering apparatus, replace a wide dynamic range camera and carry out IMAQ, when satisfying the collection requirement, cost is a lot of than reducing, and it is characterized in that:
Utilize the reasonable combination of a plurality of cameras and some filters, the same object of finding a view is taken simultaneously, the image process Computer Processing with collecting realizes image acquisition in wide dynamic range.Filtering apparatus selects to use filter among the present invention.
The reasonable combination of wherein said a plurality of camera and some filters is meant that the type of camera and filter and quantity are optional, decides on actual conditions when specifically implementing.
The reasonable combination of wherein said a plurality of camera and some filters is meant that additional filter can integrate with cam device, also can independently place, and decides on actual conditions when specifically implementing.
Wherein said with the image that collects through Computer Processing, be meant that the image that will collect splices in turn by the illuminance section, can select to realize splicing by hardware, also can utilize software to realize splicing.
This method is simple, and cost is lower, and its advantage is mainly reflected in the following aspects:
1. need not carry out large-scale redevelopment to original device, only need to get final product with the combination of a plurality of cameras and some filters is in parallel with computer according to taking needs;
2. this method uses camera and the filter commonly used can reach wide dynamic range collection purpose as no specific (special) requirements, has greatly reduced cost simultaneously;
3. with a plurality of cameras and filter reasonable combination, can realize widening to greatest extent the dynamic range shooting of illuminance, thereby greatly reduce illumination restriction bat scenery.Theoretically, can realize the IMAQ of unlimited wide dynamic range.
4. the type of camera and filter and quantity are not limit, and select as required when specifically implementing.
This method is utilized the combination of a plurality of common cameras and filter, replaces the IMAQ that a high camera of cost becomes the illuminance wide dynamic range, is applicable to any image capturing system of different light degree requirement, spends less and simple.
Description of drawings
Fig. 1 is the device schematic diagram that three cameras carry out IMAQ.
Fig. 2 is that three cameras are realized the schematic diagram that dynamic range of images is widened.
Embodiment
The present invention is the simple and easy method that a kind of multi-cam realizes becoming the illuminance image acquisition in wide dynamic range.
Figure 1 shows that the realization of three cameras becomes illuminance image acquisition in wide dynamic range device schematic diagram.Three cam devices are by a Hub hub 12 and computer 11 parallel linking, before camera 13, camera 14, place filter 16, filter 17 respectively, will not place filter before the camera 14, three cameras are taken same scenery simultaneously.
Consult Fig. 2, the scenery of clapping via filter and camera collection in computer, corresponding camera 13, camera 14, camera 15 image of adopting are respectively image 23, image 24, image 25.The dynamic range of supposing camera head is light intensity 20 (20 luminous intensity units of 20 expressions, as follows) to 10, and the dynamic range of the image of clapping is 80 to 10, filters 16 before the camera 13 can make and enter 13 light intensity attenuation is 1/4 of former light intensity, filters 17 before the camera 14 can make and enter 14 light intensity attenuation is 1/2 of former light intensity, camera 13 obtains the image that range of light intensity is 80-40 like this, range of light intensity is less than 40 place, image is a black, camera 14 obtains the image that range of light intensity is 40-20, range of light intensity is less than 20 place, image is a black, light intensity surpasses 40 place, and image is a white, and camera 15 obtains the image that range of light intensity is 20-10, light intensity surpasses 20 place, and image is a white.Remove the picture point that exceeds its dynamic range in each camera head, through software and hardware picture point is spliced in turn, obtain image 21, its illuminance strength range is 80-10, thereby realized utilizing multi-cam to replace the IMAQ that single camera becomes wide dynamic range under the illuminance, greatly reduce illuminance restriction, can realize the collection of unlimited wide dynamic range in theory reference object.During practical operation, can select the type and the quantity of camera and filter as required.Above described be a kind of special case, can also cover mutually between the dynamic range of each camera in the practical application, by the calculating of software and hardware, obtain the image of last wide dynamic range.
Claims (17)
1. a camera head is characterized in that, comprises at least two cameras.
2. camera head according to claim 1 also comprises at least one filtering apparatus, makes above-mentioned camera can collect the image of Different Dynamic scope.
3. camera head according to claim 2 is characterized in that, described filtering apparatus and cam device integrate or independent the placement.
4. a method that obtains the image in the same target Different Dynamic scope is characterized in that, switches filtering apparatus rapidly, makes the image that collects have different dynamic ranges.
5. method according to claim 3 is characterized in that switching the time interval of filtering apparatus or its equivalent device less than 1 second.
6. method according to claim 3 is characterized in that switching the time interval of filtering apparatus or its equivalent device less than 0.1 second.
7. method according to claim 3 is characterized in that switching the time interval of filtering apparatus or its equivalent device less than 0.01 second.
8. method according to claim 3 is characterized in that switching the time interval of filtering apparatus or its equivalent device less than 0.001 second.
9. an image processing method is characterized in that, the image splicing with the same target that obtains in the Different Dynamic scope obtains the bigger image of dynamic range.
10. method according to claim 9 is characterized in that, described image splicing is by hard-wired.
11. method according to claim 9 is characterized in that, described image splicing realizes by software.
12. an image processing apparatus is characterized in that, the image splicing with the same target that obtains in the Different Dynamic scope obtains the wideer image of dynamic range.
13. device according to claim 12 is characterized in that, described image splicing is by hard-wired.
14. device according to claim 12 is characterized in that, described image splicing realizes by software.
15. a camera system of obtaining wide dynamic range is characterized in that, comprises the device that can gather the Different Dynamic range image and can splice to obtain the more device of wide dynamic range image the Different Dynamic range image
16. system according to claim 15 is characterized in that, described image splicing is by hard-wired.
17. system according to claim 15 is characterized in that, described image splicing realizes by software.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510001909 CN1805551A (en) | 2005-01-11 | 2005-01-11 | Simple method of implementing image acquisition in wide dynamic range with multiple cameras |
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| CN 200510001909 CN1805551A (en) | 2005-01-11 | 2005-01-11 | Simple method of implementing image acquisition in wide dynamic range with multiple cameras |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060611B (en) * | 2007-05-09 | 2010-09-29 | 北京中星微电子有限公司 | A method and system for acquiring the video data |
| CN103546730A (en) * | 2012-07-11 | 2014-01-29 | 北京博雅华录视听技术研究院有限公司 | Method for enhancing light sensitivities of images on basis of multiple cameras |
| CN103905731A (en) * | 2014-03-26 | 2014-07-02 | 武汉烽火众智数字技术有限责任公司 | Broadband dynamic image collection method and system |
| CN107063230A (en) * | 2017-03-22 | 2017-08-18 | 南京农业大学 | The tractor vision guided navigation image capturing system and method for a kind of illumination adaptive |
| WO2019080543A1 (en) * | 2017-10-23 | 2019-05-02 | 深圳看到科技有限公司 | High dynamic range video capturing method and capturing device |
| CN110381262A (en) * | 2019-07-03 | 2019-10-25 | 深圳华萤光电技术有限公司 | Fast imaging formula brightness measurement method, apparatus and programmable imaging brightness meter |
| CN111836017A (en) * | 2020-07-15 | 2020-10-27 | 广东欧谱曼迪科技有限公司 | Ultra-long depth-of-field ultra-wide dynamic endoscopic camera system and method |
-
2005
- 2005-01-11 CN CN 200510001909 patent/CN1805551A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060611B (en) * | 2007-05-09 | 2010-09-29 | 北京中星微电子有限公司 | A method and system for acquiring the video data |
| CN103546730A (en) * | 2012-07-11 | 2014-01-29 | 北京博雅华录视听技术研究院有限公司 | Method for enhancing light sensitivities of images on basis of multiple cameras |
| CN103905731A (en) * | 2014-03-26 | 2014-07-02 | 武汉烽火众智数字技术有限责任公司 | Broadband dynamic image collection method and system |
| CN107063230A (en) * | 2017-03-22 | 2017-08-18 | 南京农业大学 | The tractor vision guided navigation image capturing system and method for a kind of illumination adaptive |
| CN107063230B (en) * | 2017-03-22 | 2020-08-11 | 南京农业大学 | Illumination self-adaptive tractor visual navigation image acquisition system and method |
| WO2019080543A1 (en) * | 2017-10-23 | 2019-05-02 | 深圳看到科技有限公司 | High dynamic range video capturing method and capturing device |
| US11070741B2 (en) | 2017-10-23 | 2021-07-20 | Shenzhen Kandao Technology Co. Ltd | High dynamic range video shooting method and device |
| CN110381262A (en) * | 2019-07-03 | 2019-10-25 | 深圳华萤光电技术有限公司 | Fast imaging formula brightness measurement method, apparatus and programmable imaging brightness meter |
| CN110381262B (en) * | 2019-07-03 | 2021-12-28 | 深圳华萤光电技术有限公司 | Rapid imaging type brightness measuring method and device and programmable imaging brightness meter |
| CN111836017A (en) * | 2020-07-15 | 2020-10-27 | 广东欧谱曼迪科技有限公司 | Ultra-long depth-of-field ultra-wide dynamic endoscopic camera system and method |
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