CN104159046A - Self-adaptive wide dynamic imaging method and device applied to moon exploration project - Google Patents
Self-adaptive wide dynamic imaging method and device applied to moon exploration project Download PDFInfo
- Publication number
- CN104159046A CN104159046A CN201410447104.7A CN201410447104A CN104159046A CN 104159046 A CN104159046 A CN 104159046A CN 201410447104 A CN201410447104 A CN 201410447104A CN 104159046 A CN104159046 A CN 104159046A
- Authority
- CN
- China
- Prior art keywords
- wide dynamic
- image data
- frame image
- current frame
- expose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Studio Devices (AREA)
Abstract
The invention discloses a self-adaptive wide dynamic imaging method and device applied to a moon exploration project. The method comprises the following steps: acquiring and outputting current frame image data by using an image sensor, and performing primary exposure; judging whether overexposure or underexposure occurs or not according to a statistical histogram; performing secondary exposure; and fusing previous frame image data generated after the primary exposure and the secondary exposure through a gray-weighted average method into wide dynamic image data, and performing compressed encoding.
Description
Technical field
The present invention relates to video imaging technical field, particularly the wide dynamic imaging method of self adaptation and device for a kind of lunar exploration engineering.
Background technology
Dynamic range is the important indicator of evaluation map image-position sensor image quality, and dynamic range is defined as the ratio that maximum unsaturation input signal and I are surveyed input signal.The dynamic range of imageing sensor also can be regarded as the receivable intensity of illumination scope of optics.The unit of dynamic range is dB (decibel), and generally the dynamic range of human eye can be quantified as 180dB left and right, and the dynamic range of common imageing sensor is about 60～80dB.
Along with the development of space technology, the demand for multimedia video imaging in space industry is also more and more.Yet because the photoenvironment in space is uncertain, the photoenvironment of possible video capture task is intense light irradiation (sun is as light source) and half-light source (supervision target) and deposits.This just needs a kind of imaging technique of wide dynamic range to realize, and traditional image processing method is difficult to tackle this situation, and imaging is unintelligible, second-rate.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of wide dynamic imaging method of self adaptation for lunar exploration engineering is provided.The present invention is achieved through the following technical solutions:
The wide dynamic imaging method of self adaptation for lunar exploration engineering, comprises step:
S1, imageing sensor collection are also exported current frame image data;
S2, current frame image data are carried out to single exposure;
S3, according to the current frame image data formation statistic histogram after single exposure, according to statistic histogram, judge whether overexposure or owe to expose to the sun of current frame image data after single exposure;
S4, respectively overexposure or the current frame image data of owing to expose to the sun are carried out to re-expose;
Current frame image data after S5, synthetic single exposure and the current frame image data after re-expose, be fused into wide dynamic images frame data by the intensity-weighted method of average;
S6, wide dynamic images frame data are carried out to compressed encoding and output.
Preferably, the output frame rate of imageing sensor was 25 frame/seconds.
Preferably, wide dynamic images frame data are carried out to compressed encoding and output comprises: adopt JPEG/H264 to be compressed into data code flow, output frame rate was 10/25 frame/second.
The present invention separately provides the wide dynamic imaging device of self adaptation for a kind of lunar exploration engineering, comprising:
Imageing sensor, in order to gather, to export current frame image data, and carries out single exposure;
Digital signal processor, connection layout image-position sensor, obtain the statistic histogram of the current frame image data after single exposure, judge whether overexposure or owe to expose to the sun of current frame image data after single exposure, respectively overexposure or the current frame image data of owing to expose to the sun are carried out to re-expose, current frame image data after single exposure and re-expose are fused into wide dynamic images frame data by the intensity-weighted method of average, and wide dynamic images frame data are carried out to compressed encoding and output.
Preferably, the output frame rate of imageing sensor was 25 frame/seconds.
Preferably, wide dynamic images frame data are carried out to compressed encoding and output comprises: adopt JPEG/H264 to be compressed into data code flow, output frame rate was 10/25 frame/second.
Preferably, digital signal processor is by I2C interface connection layout image-position sensor.
The view data of the present invention after by wide dynamic imaging, distinguishablely goes out the target that need to monitor when Yu Yangzhao district, shadow region coexists, and makes to have stronger ambient lighting adaptive capacity in the monitor task of space, has improved image quality, makes to be monitored target detail more clear.
Accompanying drawing explanation
Shown in Fig. 1 is flow chart of the present invention;
Shown in Fig. 2 is structural representation of the present invention.
Embodiment
Below with reference to accompanying drawing of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description and discussion; obviously; as described herein is only a part of example of the present invention; it is not whole examples; embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, below in conjunction with accompanying drawing, take specific embodiment and be further explained as example, and each embodiment does not form the restriction to the embodiment of the present invention.
As shown in Figure 1, a kind of wide dynamic imaging method of self adaptation for lunar exploration engineering provided by the invention, comprises step:
S1, imageing sensor collection are also exported current frame image data;
S2, current frame image data are carried out to single exposure;
S3, according to the current frame image data formation statistic histogram after single exposure, according to statistic histogram, judge whether overexposure or owe to expose to the sun of current frame image data after single exposure;
S4, respectively overexposure or the current frame image data of owing to expose to the sun are carried out to re-expose;
Current frame image data after S5, synthetic single exposure and the current frame image data after re-expose, be fused into wide dynamic images frame data by the intensity-weighted method of average;
S6, wide dynamic images frame data are carried out to compressed encoding and output.
As shown in Figure 2, hardware configuration of the present invention comprises: digital signal processor 2 (DSP), nonvolatile storage (FALSH), 27MHz crystal oscillator, DDR2 SDRAM memory, DDR2 SDRAM memory, 24MHz crystal oscillator, imageing sensor 1 (OV10633), power input interface, DCDC LDO power conversion chip, MCBSP data output interface, instruction interface, temperature and operating state acquisition interface, visible light lens.
Based on cmos image sensor+DSP digital processing unit framework, DSP digital signal processor carries out initial configuration by I2C interface to imageing sensor, imageing sensor obtains after light signal by visible light lens, the AD module carrying by imageing sensor is converted to light signal after the signal of telecommunication, present frame F1 is carried out once to automatic and corresponding re-expose, finally form the frame compressing image data not possess wide dynamic effect.By the view data after wide dynamic imaging, distinguishablely go out the target that need to monitor when Yu Yangzhao district, shadow region coexists, make to there is stronger ambient lighting adaptive capacity in the monitor task of space, improved image quality, make to be monitored target detail more clear.
According to the scheme of cmos image sensor+DSP digital processing unit framework, the present invention mainly contains following components and forms:
1, by digital signal processor, cmos image sensor is controlled by I2C, made it complete correct initialization.It was 25 frame/seconds that cmos image sensor output frame rate is set during initialization, and Exposure mode is automatic exposure.
2, by I2C, cmos image sensor to be set be Manual exposure to digital signal processor, then obtain the statistic histogram that cmos image sensor forms after to present frame automatic exposure, according to the result of statistic histogram, judge current image frame overexposure or owe to expose to the sun, thereby carrying out re-expose.
3, by optimization process, DSP digital signal processor can complete the execution of wide dynamic algorithm in 10ms, because the output of current production is the data code flow compressing through JPEG/H264, frame per second was 10/25 frame/second, and DSP digital signal processor compresses the time of a frame image data and is less than 20ms, therefore can not cause frame loss condition to occur.
4, this system architecture the is outside plug-in DDR2 SDRAM of two 64MB, be enough to tackle the storage of SD (resolution is 720*576), high definition (1280*720 or 1920*1080) or ultra high-definition (2048*2048) at least 10 frame image datas, follow-up function expansibility is better.
Intensity-weighted method of average canonical algorithm is as follows:
Image A and the B identical to two frame resolution, resolution sizes is W1*H2, the fused images obtaining after merging is G, to the average fusion process of intensity-weighted of A, two source figure of B, can be expressed as so: G (w1, h2)=ω 1A (w1, h2)+ω 2B (w1, h2).In formula: ω 1+ ω 2=1.ω 1, ω 2 are general, and value is 0.5 and 0.5, also can arrange as the case may be.
Proposition of the present invention is based on cmos image sensor+DSP digital processing unit general-purpose platform, than it, utilizes dedicated platform and utilizes the special image transducer from Bandwidth Dynamic SOC to have great advantage in the application of space industry, be mainly reflected in following some:
1, use general digital signal processor (DSP device) and there is more flexibility than using special-purpose ASIC process chip to realize wide dynamic algorithm, can, according to different mission requirements, select different digital signal processors to complete wide dynamic algorithm.
2, use conventional cmos image sensor, to cmos image sensor requirements of type selecting, be only need possess Manual exposure function, common cmos image sensor all possesses Manual exposure function now, like this can be different according to mission requirements, the cmos image sensor of selecting user to need designs.
3, this figure image width dynamic algorithm design optimization, highly versatile, practical application effect is good, can be to a plurality of platform transplantations.
4, due to the particularity of space environment, in order to guarantee normally to work under the rugged environment of space, device used is all selected high-grade device, and through screening experiment.
The present invention be mainly used in the external shooting sun in cabin enter visual angle and object that need to take also there is visual field simultaneously in time, can clear object be carried out to imaging, make its details clear and legible, be not subject to the sun to enter the impact of visual field.The present invention is also used in extremely strong illumination in addition and utmost point low light shines the imaging simultaneously and under the environment of depositing, as there being the distinguishable object in sun shadow region, visual field as a setting to take profile.This technology has improved the wide dynamic illumination adaptive capacity of imaging device greatly, has solved on the basis of using universal CMOS imageing sensor and has realized the wide dynamic imaging of self adaptation, and imaging effect is desirable.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. the wide dynamic imaging method of self adaptation for lunar exploration engineering, is characterized in that, comprises step:
S1, imageing sensor collection are also exported current frame image data;
S2, current frame image data are carried out to single exposure;
S3, according to the current frame image data formation statistic histogram after single exposure, according to statistic histogram, judge whether overexposure or owe to expose to the sun of current frame image data after single exposure;
S4, respectively overexposure or the current frame image data of owing to expose to the sun are carried out to re-expose;
Current frame image data after S5, synthetic single exposure and the current frame image data after re-expose, be fused into wide dynamic images frame data by the intensity-weighted method of average;
S6, wide dynamic images frame data are carried out to compressed encoding and output.
2. the wide dynamic imaging method of self adaptation for lunar exploration engineering according to claim 1, is characterized in that, the output frame rate of described imageing sensor was 25 frame/seconds.
3. the wide dynamic imaging method of self adaptation for lunar exploration engineering according to claim 1, is characterized in that, described wide dynamic images frame data is carried out to compressed encoding and output comprises: adopt JPEG/H264 to be compressed into data code flow, output frame rate was 10/25 frame/second.
4. the wide dynamic imaging device of self adaptation for lunar exploration engineering, is characterized in that, comprising:
Imageing sensor, in order to gather, to export current frame image data, and carries out single exposure;
Digital signal processor, connect described imageing sensor, obtain the statistic histogram of the described current frame image data after single exposure, judge whether overexposure or owe to expose to the sun of current frame image data after single exposure, respectively overexposure or the current frame image data of owing to expose to the sun are carried out to re-expose, current frame image data after single exposure and re-expose are fused into wide dynamic images frame data by the intensity-weighted method of average, and described wide dynamic images frame data are carried out to compressed encoding and output.
5. the wide dynamic imaging device of self adaptation for lunar exploration engineering according to claim 4, is characterized in that, the output frame rate of described imageing sensor was 25 frame/seconds.
6. the wide dynamic imaging device of self adaptation for lunar exploration engineering according to claim 4, is characterized in that, described wide dynamic images frame data is carried out to compressed encoding and output comprises: adopt JPEG/H264 to be compressed into data code flow, output frame rate was 10/25 frame/second.
7. the wide dynamic imaging device of self adaptation for lunar exploration engineering according to claim 4, is characterized in that, described digital signal processor connects described imageing sensor by I2C interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447104.7A CN104159046A (en) | 2014-09-04 | 2014-09-04 | Self-adaptive wide dynamic imaging method and device applied to moon exploration project |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447104.7A CN104159046A (en) | 2014-09-04 | 2014-09-04 | Self-adaptive wide dynamic imaging method and device applied to moon exploration project |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104159046A true CN104159046A (en) | 2014-11-19 |
Family
ID=51884443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410447104.7A Pending CN104159046A (en) | 2014-09-04 | 2014-09-04 | Self-adaptive wide dynamic imaging method and device applied to moon exploration project |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104159046A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450932A (en) * | 2015-12-31 | 2016-03-30 | 华为技术有限公司 | Backlight photographing method and device |
| CN106934786A (en) * | 2015-12-31 | 2017-07-07 | 深圳市宝捷信科技有限公司 | A kind of image processing software algorithm for realizing mould monitor |
| CN109102481A (en) * | 2018-07-11 | 2018-12-28 | 江苏安威士智能安防有限公司 | automatic wide dynamic processing algorithm based on illumination analysis |
| CN112839180A (en) * | 2019-11-25 | 2021-05-25 | 合肥美亚光电技术股份有限公司 | Exposure control method and device, image acquisition equipment and intraoral scanner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194902A1 (en) * | 2009-02-05 | 2010-08-05 | National Chung Cheng University | Method for high dynamic range imaging |
| CN101997981A (en) * | 2010-11-01 | 2011-03-30 | 惠州Tcl移动通信有限公司 | Mobile phone camera-based latitude realization method and mobile phone |
| CN102480599A (en) * | 2010-11-22 | 2012-05-30 | 华晶科技股份有限公司 | Image photographing device and image synthesis method thereof |
-
2014
- 2014-09-04 CN CN201410447104.7A patent/CN104159046A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194902A1 (en) * | 2009-02-05 | 2010-08-05 | National Chung Cheng University | Method for high dynamic range imaging |
| CN101997981A (en) * | 2010-11-01 | 2011-03-30 | 惠州Tcl移动通信有限公司 | Mobile phone camera-based latitude realization method and mobile phone |
| CN102480599A (en) * | 2010-11-22 | 2012-05-30 | 华晶科技股份有限公司 | Image photographing device and image synthesis method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450932A (en) * | 2015-12-31 | 2016-03-30 | 华为技术有限公司 | Backlight photographing method and device |
| CN106934786A (en) * | 2015-12-31 | 2017-07-07 | 深圳市宝捷信科技有限公司 | A kind of image processing software algorithm for realizing mould monitor |
| CN105450932B (en) * | 2015-12-31 | 2018-11-09 | 华为技术有限公司 | Backlight photographic method and device |
| CN106934786B (en) * | 2015-12-31 | 2022-04-26 | 深圳市宝捷信科技有限公司 | Method for realizing image processing software of mold monitor |
| CN109102481A (en) * | 2018-07-11 | 2018-12-28 | 江苏安威士智能安防有限公司 | automatic wide dynamic processing algorithm based on illumination analysis |
| CN109102481B (en) * | 2018-07-11 | 2021-09-28 | 江苏安威士智能安防有限公司 | Automatic wide dynamic processing algorithm based on illumination analysis |
| CN112839180A (en) * | 2019-11-25 | 2021-05-25 | 合肥美亚光电技术股份有限公司 | Exposure control method and device, image acquisition equipment and intraoral scanner |
| CN112839180B (en) * | 2019-11-25 | 2022-05-31 | 合肥美亚光电技术股份有限公司 | Exposure control method and device, image acquisition equipment and intraoral scanner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5566133B2 (en) | Frame rate conversion processor | |
| CN104159046A (en) | Self-adaptive wide dynamic imaging method and device applied to moon exploration project | |
| US10855930B2 (en) | Video system, video processing method, program, camera system, and video converter | |
| CN104184958A (en) | Automatic exposure control method and device based on FPGA and suitable for space exploration imaging | |
| KR20190010040A (en) | Electronic device and method for compressing high dynamic range image data in the electronic device | |
| CN103546730A (en) | Method for enhancing light sensitivities of images on basis of multiple cameras | |
| CN106161984B (en) | Video image highlight suppression, contour and detail enhancement processing method and system | |
| DE112012003264T5 (en) | Image processing apparatus, image processing method and program, and image pickup apparatus having an image processing apparatus | |
| CN104639923A (en) | Method and device for processing image data, and terminal | |
| US7822248B2 (en) | Endoscope processor, computer program product, and endoscope system | |
| US8890967B2 (en) | Method apparatus for controlling exposure amount of an imaging device | |
| CN113273180B (en) | Image processing apparatus and method | |
| CN105141841A (en) | Camera equipment and method therefor | |
| CN112188093A (en) | Bimodal signal fusion system and method | |
| CN112188092B (en) | Bimodal signal processing system and method | |
| CN103905738A (en) | High-dynamic-range image generation system and method | |
| CN104243841A (en) | Image processing method and image processing device | |
| CN115829868B (en) | Underwater dim light image enhancement method based on illumination and noise residual image | |
| CN204575959U (en) | With the lll night vision that digital picture exports | |
| CN115589455A (en) | Night video image enhancement system based on FPGA + ARM | |
| CN112702588B (en) | Dual-mode image signal processor and dual-mode image signal processing system | |
| WO2023110880A1 (en) | Image processing methods and systems for low-light image enhancement using machine learning models | |
| CN202121711U (en) | Fog-penetrating monitoring system based on machine vision | |
| CN114697537B (en) | Image acquisition method, image sensor, and computer-readable storage medium | |
| CN209562673U (en) | A kind of local auto-adaptive imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141119 |
|
| RJ01 | Rejection of invention patent application after publication |