CN103802727A

CN103802727A - Low-visibility guiding system

Info

Publication number: CN103802727A
Application number: CN201210455552.2A
Authority: CN
Inventors: 王也
Original assignee: SHANGHAI CITY MINHANG DISTRICT INTELLECTUAL PROPERTY PROTECTION ASSOCIATION
Current assignee: SHANGHAI CITY MINHANG DISTRICT INTELLECTUAL PROPERTY PROTECTION ASSOCIATION
Priority date: 2012-11-14
Filing date: 2012-11-14
Publication date: 2014-05-21

Abstract

The invention discloses a low-visibility guiding system. The low-visibility guiding system comprises two parts, i.e., a detector front end and a fusion system, wherein the detector front end comprises a fixed base, a rotary base, an installation frame, a thermal infrared imager, a micro-optical imager, and a camera; the fusion system comprises image processing equipment and display equipment. The low-visibility guiding system can be used for auxiliary driving systems of helicopters, ships and vehicles, helps drivers to drive safely and also can be used for search and rescue and security protection in accidents and the like.

Description

A kind of low visibility guide system

Technical field

Auxiliary guide apparatus field while the present invention relates to a kind of low visibility, particularly a kind of based on multichannel blind guide system.

Background technology

Along with China's economic society develops rapidly, all kinds of vehicle such as aircraft, boats and ships and automobile increase sharply.Meanwhile, traffic accident is also in continuous increase, and safety traffic has become day by day serious social concern.

Night, illumination restriction and inclement weather were the major causes that traffic accident occurs.Its major cause is that night " visbility " is not good, cannot see road conditions clearly.In Wenchuan earthquake disaster relief processes in 2008, the accident of China's helicopter is also because run into heavy rain weather, poor visibility, and chaufeur cannot be seen scenery nearby clearly.Civil Aviation Administration of China is to pointing out in the report of 1997 " 5.8 " great air-accident investigation, " night flying runs into heavy rain, poor visibility, lighting effects are bad, see that ground is unclear " be the major reason that causes aeroplane accident.

Airborne, boat-carrying or vehicle-mounted auxiliary guide system are one of traffic insurance technology, it is intended to improve Driver Vision usefulness, by improving the relation of vision and driving behavior, make people-vehicle-roadnet more stable, reliable, improve the active safety of vehicle.

Accessorial visual technology has obtained some achievements at present.France, the U.S., Japan etc. have all developed practical auxiliary guide system.France has developed the auxiliary guide system of lll night vision, in visible ray and near infrared band work.Chaufeur can be the in the situation that of the poor visibility such as night, weather condition be severe, and the road ahead image spreading out of by LCDs carries out assisting vehicle driving.

The DAS (Driver Assistant System) of General Motors Overseas Corporation's development is utilized LONG WAVE INFRARED pyroelectric detector, can see the vehicle outside 1000 m～1500 m clearly.Japanese scholars has been developed ultraviolet DAS (Driver Assistant System), irradiates the road sign that scribbles fluorescent material with ultraviolet ray, makes road sign send fluorescence, is easy to identification, thereby effectively solves the problem that automobile lamp is dazzle the eyes.But atmosphere is more severe to UV absorption, can only solve more short-range sight

Examine problem.

Huabei (North China) Institute of Electro-Optics of China, Xi'an Applied Optics Research Inst. etc. have also developed similar vehicle and have taught viewing system, and sensor adopts thermal infrared imager or low-light level television.

In summary, traditional auxiliary guide system all adopts single-sensor, but any sensor has shortcoming separately, the visible ray that night sky that for example gleam image intensifier reflects by receiving target is faint and near infrared light and imaging, become the observation habit of image and human eye more identical, image quality is better, and more target detail can be provided, but ranging coverage and the impact of observing effect climate are larger, and the ability that penetrates smog is poor.Thermal infrared imager imaging by surveying self thermal radiation of earth surface scenery, has the ability of round-the-clock imaging.Thermal infrared imager has the ability that penetrate smog stronger than gleam image intensifier, and ranging coverage is far away, but its resolution is lower, and details is differentiated rate variance, and the background lower for temperature can not finely show.

For the deficiency of current auxiliary guide system, the present invention, from the angle of image co-registration, provides a kind of by the infrared auxiliary guide system organically combining with the advantage of low-light technology, can effectively promote the safety that under low visibility condition, traffic is driven.

Summary of the invention

The technical problem to be solved in the present invention is: for the deficiency of the auxiliary guide system of moment sensor, provide a kind of based on multichannel low visibility guide system, organically combine with the advantage of low-light technology infrared, can effectively promote the safety that under low visibility condition, traffic is driven.

The technical solution adopted in the present invention is: the present invention includes detector front end and emerging system two parts; Detector front end comprises firm banking 1, rotating base 15, erecting frame 14, thermal infrared imager 12, low-light level imaging instrument 13, camera 11; Emerging system comprises image processing equipment 7, display equipment 8.

Its output image has adopted the imaging of two spectrum color integration, has twilight image resolution concurrently high, and the good and infrared image of stereovision penetrates the feature that smog ability is strong, ranging coverage is far away.

Firm banking 1 is mainly used in the front end instrument of fixed detector, rotating base 15 is arranged on firm banking 1, can guarantee that detecting instrument rotates within the scope of 360 degree, thermal infrared imager 12, low-light level imaging instrument 13, camera 11 are fixed on rotating base 15 by erecting frame 14, wherein between erecting frame 14 and rotating base 15, adopt chain connection, the convenient angle that regulates detecting devices.

Image processing equipment 7 mainly contains A/D modular converter, image registration module, spatio-temporal filtering noise reduction module, image co-registration module, video synthesis module, D/A modular converter, telltale.

Thermal infrared imager 12, low-light level imaging instrument 13, camera 11 are connected with image processing equipment 7 by camera image output line 8, thermal infrared imager image output line 9, low-light level imaging instrument image output line 10, export to telltale 2 through processing synthetic image by data line 4.

Can show according to image processing equipment instrument 6, utilize adjusting knob 5 to make the appropriate adjustments detection image parameter; The image of final output can use the adjusting knob 3 on telltale 2 to carry out the adjusting of the aspects such as visibility, contrast ratio.

The technical advantage that the present invention has is: can round-the-clockly observe, be not subject to weather effect; Have gleam image intensifier resolution concurrently high, thermal infrared imager penetrates the feature that smog ability is strong, ranging coverage is far away, and color fusion image meets human eye vision custom; Real-time is high, and video smoothness, without the distinguishable time delay of human eye; Volume is little, low in energy consumption, lightweight, uses simple.

Can be used for the DAS (Driver Assistant System) of helicopter, ship and vehicle, help driver safety to drive, also can be used for accident search and rescue, security protection etc.

Accompanying drawing explanation

Fig. 1 is system architecture composition diagram

Wherein: 1. firm banking 2. telltale 3. display register knob 4. video output cable 5. image processing equipment adjusting knob 6. display instrument 7. image processing equipment 8. camera image output line 9. thermal infrared imager image output line 10. low-light level imaging instrument image output line 11. camera 12. thermal infrared imager 13. low-light level imaging instrument 14. erecting frame 15. rotating bases

The specific embodiment

In the present invention, detector front end, guaranteeing parallelism of optical axis, meets under more than 95% prerequisite of image registration rate and gathers infrared and twilight image; Merge circuit low-light video is carried out to spatio-temporal filtering noise reduction process, to remove the flicker noise in twilight image.First low-light video after noise reduction and infrared video will carry out the registration process of image, and the infrared and twilight image after registration will carry out the image co-registration of the colored transmission based on YCbCr, finally deliver to after D/A is converted into normal video and export.Output image has adopted the imaging of two spectrum color integration, has twilight image resolution concurrently high, and the good and infrared image of stereovision penetrates the feature that smog ability is strong, ranging coverage is far away.

Because twilight image is reflected image, radio-frequency component is many, can reflect the details of scene, but contrast ratio is lower under certain illumination; Infrared image is radiation image, and gray scale is determined by the temperature difference of target and background, can not reflect real scene.The present invention has overcome the shortcoming of the DAS (Driver Assistant System) of the infrared or low-light level imaging of independent use, adopt three-dimensional space-time filter, to signal filtering after its sampling, eliminate the flicker noise of twilight image, improve the visibility of image, utilize appropriate algorithm simultaneously, merge low-light and infrared image and obtain pseudo color image, make it in having both advantages concurrently, have emulation color, be easier to eye recognition.The original technology and method of the aspects such as twilight image noise reduction, image registration, color integration, greatly improved the signal to noise ratio of system, made output image effectively comprehensive and excavated characteristic information, enhanced scene is understood, outstanding target, is suitable for observation, classification and the identification of human eye.

First, take twilight image as benchmark, utilize multi-source image registration test program and design bilinearity digital interpolative method, to the coordinate of twilight image, obtain the coordinate address of the each pixel of infrared image after affine affine infrared image.Like this, by the mode of tabling look-up, directly call the affine address of infrared image, obtain respective pixel gray value, thereby reached the object of rapid registering.

Secondly, by A.Toet method is optimized, optimize this color transmission method, adopted YCbCr space to carry out color transmission processing, obtained good effect.Because the conversion between YCbCr space and rgb space does not relate to logarithm operation, computational complexity greatly reduces, and can well apply in real-time system.

This guide system can be used for the DAS (Driver Assistant System) of helicopter, ship and vehicle, helps driver safety to drive, and also can be used for accident search and rescue, security protection etc.

Claims

1. a low visibility guide system, comprises detector front end and emerging system two parts; Detector front end comprises firm banking (1), rotating base (15), erecting frame (14), thermal infrared imager (12), low-light level imaging instrument (13), camera (11); Emerging system comprises image processing equipment (7), display equipment (8); Detector front end, guaranteeing parallelism of optical axis, meets under more than 95% prerequisite of image registration rate and gathers infrared and twilight image; Merge circuit and realize noise reduction, fusion, video output.

2. low visibility guide system according to claim 1, is characterized in that: its output image has adopted the imaging of two spectrum color integration, has twilight image resolution concurrently high, and the good and infrared image of stereovision penetrates the feature that smog ability is strong, ranging coverage is far away.

3. low visibility guide system according to claim 1 and 2, it is characterized in that: firm banking (1) is mainly used in the front end instrument of fixed detector, rotating base (15) is arranged on firm banking 1, can guarantee that detecting instrument rotates within the scope of 360 degree, thermal infrared imager (12), low-light level imaging instrument (13), camera (11) are fixed on rotating base (15) by erecting frame (14), wherein between erecting frame (14) and rotating base (15), adopt chain connection, the convenient angle that regulates detecting devices.

4. low visibility guide system according to claim 3, is characterized in that: image processing equipment (7) mainly contains A/D modular converter, image registration module, spatio-temporal filtering noise reduction module, image co-registration module, video synthesis module, D/A modular converter, telltale.