CN101860675B - Wide dynamic camera and method for realizing wide dynamic camera shooting - Google Patents

Wide dynamic camera and method for realizing wide dynamic camera shooting Download PDF

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Publication number
CN101860675B
CN101860675B CN 201010181728 CN201010181728A CN101860675B CN 101860675 B CN101860675 B CN 101860675B CN 201010181728 CN201010181728 CN 201010181728 CN 201010181728 A CN201010181728 A CN 201010181728A CN 101860675 B CN101860675 B CN 101860675B
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wide dynamic
module
image processing
optical pickocff
signal
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CN101860675A (en
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燕莉
陈家振
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I VISION ELECTRONICS CO Ltd
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I VISION ELECTRONICS CO Ltd
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Abstract

The invention provides a wide dynamic camera and a method for realizing wide dynamic camera shooting. The wide dynamic camera is composed of a lens, an optical sensor corresponding to the lens, an analog front end processor and an analog-to-digital converter which are electrically connected with the optical sensor in sequence, a wide dynamic processing module and an image processing module, wherein the image processing module performs automatic iris control for the lens. As for the wide dynamic camera and the method for realizing wide dynamic camera shooting in the invention, a cheap and common single-scan CCD optical sensor is adopted, thus having lower cost, cheap supply of kits and flexible system framework formation, satisfying day-night monitoring requirements of various light such as obvious wide dynamic effects, vivid colors, low illumination, wide dynamic range suitable for light, uniform light and the like, effectively solving the problem of narrow adaptability range for light in the traditional camera shooting technology and having no color cast in shot image color effect.

Description

Wide dynamic camera and realize the method for wide dynamic shooting
Technical field
The present invention relates in particular to a kind of method that is used for the wide dynamic camera of safety-protection system and realizes wide dynamic shooting about a kind of security protection equipment.
Background technology
Since the camcorder technology invention, exist always the light dynamic range is adapted to narrow problem, such as shining to outdoor by window from indoor, indoor illumination intensity mean value is at hundreds of Lux, and outdoor light can reach several thousand even Lux under the sunlight of fine day, under such light environment, indoor, outdoor objects can not be seen clearly simultaneously.Under such situation situation, outdoor light accounts for leading, and the time for exposure of video camera can be smaller, as reach 1/4000s, just in time object is clear the time for exposure concerning outdoor objects, and indoor object is with regard to the time for exposure deficiency, and the phenomenon of reflection is indoor darker, can't see object.Existing common camera generally has the BLC function, reduce the time for exposure and regulate by modes such as gain brightness, improve overall brightness, indoorly can obtain distinct image, but outdoor objects is just over-exposed, picture is white partially, that is to say that having common camera now can only see in limited light dynamic range use, can only see certain part in other words when bigger dynamic range is used.
In order to improve the problems referred to above, existingly proposed wide dynamic camera notion on the market and had corresponding product to release.Wide dynamic camera has the dynamic range of higher multiple than traditional rig camera, can contrast under the strong environment in light and shade and obtain distinct image, it is more and more for being widely used in the safety-protection system, common wide dynamic camera mainly contains two scanning CCD modes, as mentioned above, the indoor darker light time for exposure is relatively shorter in 1/50s, outdoor more intense light then the time for exposure long as 1/4000s, the image overlay that forms of will double exposing again is synthetic to form comparatively ideal relatively image.This two scanning more complicated, the supply of material is few, and price comparison is expensive, and whole camera chain more complicated.If an object is in the light boundary, stand under the fluorescent lamp as a people, whole people's image border has tangible frame, and this is because this part is in critical ray, time for exposure is a uncertain value, and also there is apparent in view colour cast phenomenon in image effect color.
Summary of the invention
The objective of the invention is to, a kind of wide dynamic camera is provided, it adopts single surface sweeping CCD optical pickocff, not only cost is lower, and wide dynamic effect is obvious, and the color color is true to nature, illumination is low, it is big to be fit to the light dynamic range, the demand that various light such as uniform light are day and night monitored;
Another object of the present invention is to, provide a kind of wide dynamic camera to realize the method for wide dynamic shooting, its implementation is simple, and framework is formed flexibly, can solve in traditional camera technique the light scope is adapted to narrow problem, and there is not the phenomenon of colour cast in the image effect color of taking.
To achieve these goals, the invention provides a kind of wide dynamic camera, comprise: camera lens, the optical pickocff corresponding with camera lens, the analog front end processor that electrically connects with optical pickocff successively and analog-to-digital conversion module, wide dynamic process module, and image processing module, this image processing module carries out auto iris control to camera lens.
Described optical pickocff is a single sweep CCD optical pickocff, and this optical pickocff also electrically connects a sequential and drives.
Comprise transducer digital image video signal and synchronizing signal receiver module in the described wide dynamic process module, reach rear end image processing interface module, wide dynamic process module electrically connects by this rear end image processor interface module and image processing module.
Described image processing module comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit.
Further, the present invention also provides a kind of wide dynamic camera to realize the method for wide dynamic shooting, and this method comprises:
Step 1, provide a wide dynamic camera, this wide dynamic camera comprises camera lens, the optical pickocff corresponding with camera lens, the analog front end processor that electrically connects with optical pickocff successively and analog-to-digital conversion module, wide dynamic process module, and image processing module, and this image processing module carries out auto iris control to camera lens;
To optical pickocff, optical pickocff induction light also produces the signal of telecommunication, and this signal of telecommunication is sent to analog front end processor and analog-to-digital conversion module by lens focus for step 2, light;
Step 3, analog front end processor and analog-to-digital conversion module carry out simulation process to the signal of telecommunication that receives, and convert parallel raw digital video signal to and row, field sync signal are sent to wide dynamic process module;
Step 4, wide dynamic process module are handled the digital video signal that receives, and after the dynamic range of actual light is compressed, are sent to image processing module;
Step 5, image processing module carry out image processing, exposure control, reach the white balance processing the digital signal that receives, and be encoded into the composite video signal outputting video signal.
Described optical pickocff is a single sweep CCD optical pickocff, and this optical pickocff also electrically connects a sequential and drives.
Comprise transducer digital image video signal and synchronizing signal receiver module in the described wide dynamic process module, reach rear end image processing interface module, wide dynamic process module electrically connects by this rear end image processor interface module and image processing module.
In the described step 4, the operation that wide dynamic process module is handled the digital video signal that receives comprises: transducer digital image video signal and synchronizing signal receiver module receiving digital video signal, line synchronizing signal, and field sync signal, by original color keynote, brightness, and gamma value handle, and handle through noise reduction system, handle through noise reduction color motif, brightness, gamma value again, after carrying out dynamic range noise reduction, point-to-point adjustment processing at last, send by rear end image processor interface module.
In the described step 4, wide dynamic process module is compressed the dynamic range of actual light, and the signal of being sent by rear end image processor interface module in this step is the raw digital video signal.
Described image processing module comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit.
Beneficial effect of the present invention: wide dynamic camera of the present invention and realize the method for wide dynamic shooting, it adopts the comparatively cheap and general single surface sweeping CCD optical pickocff of price, not only cost is lower, the kit supply of material is cheap, system architecture is formed flexibly, and wide dynamic effect is obvious, the color color is true to nature, illumination is low, it is big to be fit to the light dynamic range, the demand that various light such as uniform light are day and night monitored, it can effectively solve in traditional camera technique the light scope is adapted to narrow problem, and there is not the phenomenon of colour cast in the image effect color of taking.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.
In the accompanying drawing,
Fig. 1 is the module diagram of the wide dynamic camera of the present invention;
Fig. 2 is the signal processing flow figure of wide dynamic process module among the present invention;
Fig. 3 realizes the method flow diagram of wide dynamic shooting for the wide dynamic camera of the present invention.
Embodiment
Technological means and the effect thereof taked for further setting forth the present invention are described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
As shown in Figure 1, the invention provides a kind of wide dynamic camera, comprise: camera lens 10, the optical pickocff 20 corresponding with camera lens 10, the analog front end processor that electrically connects with optical pickocff 20 successively and analog-to-digital conversion module 30, wide dynamic process module 40, and image processing module 50,50 pairs of camera lenses of this image processing module 10 carry out auto iris control.
In the present invention, optical pickocff 20 is a single sweep CCD optical pickocff, and this optical pickocff 20 also electrically connects a sequential and drives 22.This single sweep CCD optical pickocff is not only with low cost, and the kit supply of material is cheap, system architecture is formed flexibly, image processing module 50 common these wide dynamic cameras of forming of itself and wide dynamic process module 40 and rear end, have numerous characteristics such as wide dynamic effect is obvious, the color color is true to nature, illumination is low, the demand that various light such as its suitable light dynamic range is big, uniform light are day and night monitored.
30 pairs of signals of telecommunication that receive from optical pickocff 20 of analog front end processor and analog-to-digital conversion module carry out simulation process, mainly comprise processing such as correlated-double-sampling filtering noise, gain controlling, black level clamper, and change into parallel raw digital video signal and row, field sync signal.
As shown in Figure 2, comprise transducer digital image video signal and synchronizing signal receiver module 42 in the wide dynamic process module 40 of the present invention, reach rear end image processing interface module 44, wide dynamic process module 40 electrically connects by this rear end image processor interface module 44 and image processing module 50.During work, transducer digital image video signal and synchronizing signal receiver module 42 receiving digital video signals, line synchronizing signal, and field sync signal, by original color keynote, brightness, and gamma value handle, and handle through noise reduction system, handle through noise reduction color motif, brightness, gamma value again, carry out at last after dynamic range noise reduction, point-to-point adjustment handle, send to image processing module 50 by rear end image processor interface module 44 and handle.
Image processing module 50 comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit (not shown).50 pairs of this image processing modules carry out image processing, exposure control, white balance processing etc. by the digital signals that image processor interface module 44 places, rear end of wide dynamic process module 40 produce, and are encoded into composite video signal and carry out video and export.
Further, the present invention also provides a kind of wide dynamic camera to realize the method for wide dynamic shooting (shown in Figure 3), and this method comprises:
Step 1, provide a wide dynamic camera, this wide dynamic camera comprises camera lens, the optical pickocff corresponding with camera lens, the analog front end processor that electrically connects with optical pickocff successively and analog-to-digital conversion module, wide dynamic process module, and image processing module, and this image processing module carries out auto iris control to camera lens.In the present invention, optical pickocff is a single sweep CCD optical pickocff, and this optical pickocff also electrically connects a sequential and drives.
To optical pickocff, optical pickocff induction light also produces the signal of telecommunication, and this signal of telecommunication is sent to analog front end processor and analog-to-digital conversion module by lens focus for step 2, light.
Step 3, analog front end processor and analog-to-digital conversion module carry out simulation process to the signal of telecommunication that receives, and convert parallel raw digital video signal to and row, field sync signal are sent to wide dynamic process module.In this step, analog front end processor and analog-to-digital conversion module carry out simulation process to the signal of telecommunication that receives from optical pickocff, mainly comprise processing such as correlated-double-sampling filtering noise, gain controlling, black level clamper, and change into parallel raw digital video signal and row, field sync signal.
Step 4, wide dynamic process module are handled the digital video signal that receives, and after the dynamic range of actual light is compressed, are sent to image processing module.Among the present invention, comprise transducer digital image video signal and synchronizing signal receiver module in the wide dynamic process module, reach rear end image processing interface module, wide dynamic process module electrically connects by this rear end image processor interface module and image processing module.During work, the operation that wide dynamic process module is handled the digital video signal that receives comprises: transducer digital image video signal and synchronizing signal receiver module receiving digital video signal, line synchronizing signal, and field sync signal, by original color keynote, brightness, and gamma value handle, and handle through noise reduction system, handle through noise reduction color motif, brightness, gamma value again, after carrying out dynamic range noise reduction, point-to-point adjustment processing at last, send by rear end image processor interface module.In this step 4, wide dynamic process module is handled the digital signal that receives, be specially each interior color motif curve of every frame picture number, brightness curve etc. as several points, we can say the dynamic range of actual light is compressed that the signal of being sent by rear end image processor interface module in this step still is the raw digital video signal.
Step 5, image processing module carry out image processing, exposure control, reach the white balance processing the digital signal that receives, and be encoded into the composite video signal outputting video signal.Image processing module comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit.This image processing module carries out image processing, exposure control, white balance processing etc. to the digital signal that is produced by the image processor interface module place, rear end of wide dynamic process module, and is encoded into composite video signal and carries out video and export.
In sum, wide dynamic camera of the present invention and realize the method for wide dynamic shooting, it adopts the comparatively cheap and general single surface sweeping CCD optical pickocff of price, not only cost is lower, the kit supply of material is cheap, system architecture is formed flexibly, and wide dynamic effect is obvious, the color color is true to nature, illumination is low, it is big to be fit to the light dynamic range, the demand that various light such as uniform light are day and night monitored, it can effectively solve in traditional camera technique the light scope is adapted to narrow problem, and there is not the phenomenon of colour cast in the image effect color of taking.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of accompanying Claim of the present invention.

Claims (8)

1. wide dynamic camera, it is characterized in that, comprise: camera lens, the optical pickocff corresponding, the analog front end processor that electrically connects with optical pickocff successively and analog-to-digital conversion module, wide dynamic process module, and image processing module with camera lens, this image processing module carries out auto iris control to camera lens;
Comprise transducer digital image video signal and synchronizing signal receiver module in the described wide dynamic process module, and rear end image processing interface module, wide dynamic process module electrically connects by this rear end image processor interface module and image processing module, the signal that described wide dynamic process module passes over described analog front end processor and analog-to-digital conversion module is by the original color keynote, brightness, and gamma value is handled, and handle through noise reduction system, again through the noise reduction color motif, brightness, gamma value is handled, carry out the dynamic range noise reduction at last, point-to-point adjustment is sent to image processing module by rear end image processor interface module after handling.
2. wide dynamic camera as claimed in claim 1 is characterized in that, described optical pickocff is a single sweep CCD optical pickocff, and this optical pickocff also electrically connects a sequential and drives.
3. wide dynamic camera as claimed in claim 1 is characterized in that, described image processing module comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit.
4. a method that realizes wide dynamic shooting is characterized in that, comprises the steps:
Step 1, provide a wide dynamic camera, this wide dynamic camera comprises camera lens, the optical pickocff corresponding with camera lens, the analog front end processor that electrically connects with optical pickocff successively and analog-to-digital conversion module, wide dynamic process module, and image processing module, and this image processing module carries out auto iris control to camera lens;
To optical pickocff, optical pickocff induction light also produces the signal of telecommunication, and this signal of telecommunication is sent to analog front end processor and analog-to-digital conversion module by lens focus for step 2, light;
Step 3, analog front end processor and analog-to-digital conversion module carry out simulation process to the signal of telecommunication that receives, and convert parallel raw digital video signal to and row, field sync signal are sent to wide dynamic process module;
Step 4, wide dynamic process module are handled the digital video signal that receives, and after the dynamic range of actual light is compressed, are sent to image processing module;
Step 5, image processing module carry out image processing, exposure control, reach the white balance processing the digital signal that receives, and be encoded into the composite video signal outputting video signal;
Comprise transducer digital image video signal and synchronizing signal receiver module in the described wide dynamic process module, and rear end image processing interface module, wide dynamic process module electrically connects by this rear end image processor interface module and image processing module, the signal that described wide dynamic process module passes over described analog front end processor and analog-to-digital conversion module is by the original color keynote, brightness, and gamma value is handled, and handle through noise reduction system, again through the noise reduction color motif, brightness, gamma value is handled, carry out the dynamic range noise reduction at last, point-to-point adjustment is sent to image processing module by rear end image processor interface module after handling.
5. the method for the wide dynamic shooting of realization as claimed in claim 4 is characterized in that, described optical pickocff is a single sweep CCD optical pickocff, and this optical pickocff also electrically connects a sequential and drives.
6. the method for the wide dynamic shooting of realization as claimed in claim 4, it is characterized in that, in the described step 4, the operation that wide dynamic process module is handled the digital video signal that receives comprises: transducer digital image video signal and synchronizing signal receiver module receiving digital video signal, line synchronizing signal, and field sync signal, by the original color keynote, brightness, and gamma value is handled, and handle through noise reduction system, again through the noise reduction color motif, brightness, gamma value is handled, carry out the dynamic range noise reduction at last, point-to-point adjustment is sent by rear end image processor interface module after handling.
7. the method for the wide dynamic shooting of realization as claimed in claim 6, it is characterized in that, in the described step 4, wide dynamic process module is compressed the dynamic range of actual light, and the signal of being sent by rear end image processor interface module in this step is the raw digital video signal.
8. the method for the wide dynamic shooting of realization as claimed in claim 4 is characterized in that, described image processing module comprises white balance processing unit, exposure-processed unit, color processing unit, reaches video encoding unit.
CN 201010181728 2010-05-21 2010-05-21 Wide dynamic camera and method for realizing wide dynamic camera shooting Expired - Fee Related CN101860675B (en)

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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
CN103581526B (en) * 2013-11-19 2016-11-09 浙江大学 A kind of adjustable Anti-shock CCD installation structure of camera lens
CN104660895A (en) * 2015-01-28 2015-05-27 四川君逸数码科技发展有限公司 Novel SDI wide dynamic range (WDR) human face capturing camera
CN105959578A (en) * 2016-07-18 2016-09-21 四川君逸数码科技股份有限公司 Wide dynamic high-definition camera based on intelligent video technology
CN112218049B (en) * 2020-09-29 2022-10-11 北京环境特性研究所 Video monitoring device

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