CN106370307A - Method and device for water surface oil spill imaging detection - Google Patents
Method and device for water surface oil spill imaging detection Download PDFInfo
- Publication number
- CN106370307A CN106370307A CN201610889030.1A CN201610889030A CN106370307A CN 106370307 A CN106370307 A CN 106370307A CN 201610889030 A CN201610889030 A CN 201610889030A CN 106370307 A CN106370307 A CN 106370307A
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- thermal infrared
- polarization
- camera
- image
- equipment
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- 238000003384 imaging method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003305 oil spill Substances 0.000 title abstract description 7
- 230000002708 enhancing effect Effects 0.000 claims abstract description 7
- 230000010287 polarization Effects 0.000 claims description 46
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000001228 spectrum Methods 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 238000003672 processing method Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000003331 infrared imaging Methods 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000000701 chemical imaging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0037—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The invention provides a method and a device for water surface oil spill imaging detection. The method comprises steps: a horizontally-polarized thermal infrared image I<parallel> and a vertically-polarized thermal infrared image I<vertical> are acquired for the same target; a non-polarized thermal infrared image I0 is calculated and I0=I<parallel>+I<vertical>; a polarization-difference thermal infrared image I1 is calculated, and I1=|I<parallel>-I<vertical>|; the polarization-difference thermal infrared image I1 is processed, and an edge extraction method is adopted to acquire an oil spill area closed contour Si(i=1, 2, ...), wherein the closed contour is a contour coordinate set; and the above acquired oil spill area closed contour information is used to carry out image enhancement processing on the non-polarized thermal infrared image I0, wherein the processing method is to enable a pixel inside the Si in the image I0 to be multiplied by an enhancement coefficient a. Thus, the effect of enhancing the oil spill area image is achieved, and the oil spill detection sensitivity is improved.
Description
Technical field
The present invention relates to water-surface oil spilling monitoring technical field, more particularly to a kind of spilled oil on water surface imaging detection method and dress
Put.
Background technology
After there is oil spill accident in the waters surface such as ocean, inland river, can quick response, identify spilled oil on water surface in time, and draw
The spatial distribution of oil spilling, non-to determining that oil spilling recycle program, oil spilling floating track modeling, the assessment of dispersant treatment effect etc. have
Often important effect.With the progress of remote sensing technology, the technology such as synthetic aperture radar, multispectral imaging and thermal infrared imaging is significantly
Promote the efficiency of spill response response, but said method still has limitation.Synthetic aperture radar method is visited to closely oil spilling
Survey effect bad, and aquatic environment condition is required higher it is necessary to have more suitable wind speed and wave height just can obtain
Preferably recognition effect.Multispectral imaging is mainly imaged using the spectrum of Visible-to-Near InfaRed spectral coverage, to environmental lighting conditions
Higher with observation angle requirement, and can only use on daytime, cannot use in the case of night or harsh environmental conditions.Heat is red
Outer imaging method is detected using the temperature contrast between oil slick and water, achievable round-the-clock and round-the-clock detection, but
It is that recognition effect is poor when temperature contrast is less.
Content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of spilled oil on water surface imaging detection method and dress
Put, be capable of round-the-clock water-surface oil spilling monitoring, and greatly improve detectivity.
The purpose of the present invention to implement by the following technical programs:
A kind of spilled oil on water surface imaging detection method, comprising:
(1) same target is gathered respectively with the thermal infrared images i of horizontal polarization//Thermal infrared images i with vertical polarization⊥；
(2) calculate unpolarized thermal infrared images i0=i//+i⊥；
(3) calculate polarization differential thermal infrared images i1=| i//-i⊥|；
(4) to polarization differential thermal infrared images i1Processed, oil spilling region disk wheel is obtained using edge extracting method
Wide si(i=1,2 ...)；Described closed outline is the set of profile coordinate；
(5) pass through described oil spilling region closed outline to unpolarized thermal infrared images i0Carry out image enhancement processing.
The operating spectrum band of described thermal infrared images imaging is thermal infrared spectral coverage, that is, 8～14 μm.
For obtain more preferable Effect on Detecting, select less imaging angle, imaging angle between 5 °～30 °, preferably
The angle of the optical axis of imaging device and the water surface is between 5 °～30 °.
Described by described oil spilling region closed outline to unpolarized thermal infrared images i0Carry out image enhancement processing, bag
Include: to image i0Middle siInternal pixel is multiplied by enhancing coefficient a；
Wherein, described enhancing coefficient a be used for increase si inside and outside between contrast, and ensure si inside be unlikely to
Supersaturation；
Wherein, if the image intensity value within si is less than outside gray value, a ＜ 1, if the gradation of image within si
Value is higher than outside gray value, a ＞ 1.
A kind of spilled oil on water surface imaging detection equipment, polarizes camera, signal processing unit and display including two thermal infrareds single
Unit, described in two of which, thermal infrared polarization camera is arranged side by side and points to same direction, and one of described thermal infrared is inclined
Shake the linear polarization of camera, vertical with the linear polarization that thermal infrared another described polarizes camera；Two described thermal infrareds
Polarization camera is connected with described signal processing unit, for image is sent to described signal processing unit, and by described
The image that signal processing unit polarizes camera to two thermal infrareds is processed, and result is sent to described display single
Unit's display.
Wherein, the linear polarization of a described thermal infrared polarization camera is horizontal direction, and another described thermal infrared is inclined
Shake camera linear polarization be vertical direction.
Each described thermal infrared polarizes camera and includes successively along the linear polarizer of light path arrangement, thermal infrared camera lens, heat
Infrared planar array detector.
Described signal processing unit is embedded computer or portable computer.
Described display unit can be liquid crystal display or portable computer display screen.
Thermal infrared polarizes the optical axis of camera and the angle of sleep between 5 °～30 °.
Compared with prior art, the invention has the beneficial effects as follows:
(1) oil spilling detection is carried out using the imaging of thermal infrared spectral coverage, there is round-the-clock detectivity；
(2) adopt polarization differential imaging method to strengthen the detectivity in oil spilling region, improve the sensitivity that oil spilling detects.
Brief description
Below according to drawings and Examples, the present invention is described in further detail.
Fig. 1 is a kind of spilled oil on water surface imaging detection method schematic diagram；
Fig. 2 is a kind of flow chart of spilled oil on water surface imaging detection method；
Fig. 3 is a kind of thermal infrared polarization imaging camera composition schematic diagram.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Preferred embodiment, to according to lateral plate component proposed by the present invention and air-conditioner outdoor unit specific embodiment, feature and its effect, in detail
Carefully it is described as follows.
As Figure 1-3, it is illustrated in figure 1 a kind of spilled oil on water surface imaging detection method schematic diagram.11 is the water surface, and 12 is water
Face oil spilling, 13 is thermal infrared polarization imaging camera, and 14 is signal processor, and 15 is display, and 16 is thermal infrared polarization imaging phase
The angle that during machine filming surface, optical axis is formed with the water surface.
During thermal infrared polarization imaging camera 16 work, shoot the two width images containing the water surface 11 and oil spilling 12, image is entered
Row is processed, and result is shown on a display 15.
The flow chart that Fig. 2 carries out image procossing for signal processor.Idiographic flow is:
Flow process 21: same target is gathered respectively with the thermal infrared images i of horizontal polarization//Thermal infrared images with vertical polarization
i⊥；
Flow process 22: calculate unpolarized thermal infrared images i0=i//+i⊥；
Flow process 23: calculate polarization differential thermal infrared images i1=| i//-i⊥|；
Flow process 24: to polarization differential thermal infrared images i1Processed, oil spilling region envelope is obtained using edge extracting method
Close profile si(i=1,2 ...)；Described closed outline is the set of profile coordinate；If there is multiple oil spilling regions, it will deposit
In multiple closed outlines, each individual processing, processing method is identical.
Flow process 25: by described oil spilling region closed outline to unpolarized thermal infrared images i0Carry out image enhancement processing.
Specifically, using above-mentioned acquisition oil spilling region closed outline information to unpolarized thermal infrared images i0Carry out image
Enhancement process, processing method is to image i0Middle siInternal pixel is multiplied by enhancing coefficient a, thus reaching to oil spilling area image
Enhanced effect, improves the sensitivity of oil spilling.Wherein, described enhancing coefficient a be used for increase si inside and outside between contrast
Degree, and ensure to be unlikely to supersaturation inside si；Wherein, if the image intensity value within si is less than outside gray value, a ＜
1, if the image intensity value within si is higher than outside gray value, a ＞ 1.The purpose being multiplied by coefficient a is to increase inside si with outward
Contrast between portion, makes target become apparent from.
The operating spectrum band of described thermal infrared imaging is thermal infrared spectral coverage, that is, 8～14 μm.
For obtaining more preferable Effect on Detecting, select less imaging angle, the preferably optical axis of imaging device and the water surface
Angle is between 5 °～30 °.
It is illustrated in figure 3 a kind of thermal infrared polarization imaging camera composition schematic diagram realizing this programme.Thermal infrared polarizes
Polarize camera 31a and 31b as camera bag contains two Thermal Infra-Reds.Thermal Infra-Red polarization camera 31a in comprise linear polarizer 32a,
Thermal infrared camera lens 33a, thermal infrared detector 34a.Linear polarizer 32b, thermal infrared camera lens is comprised in Thermal Infra-Red polarization camera 31b
33b, thermal infrared detector 34b.Linear polarizer 32a is identical with linear polarizer 32b material, but the linear polarization side of linear polarizer 32a
To for horizontal direction, the linear polarization of linear polarizer 32b is horizontal direction.Thermal infrared camera lens 33a is complete with thermal infrared camera lens 33b
Exactly the same, thermal infrared detector 34a is identical with thermal infrared detector 34b.Thermal Infra-Red polarizes the optical axis 35a of camera 31a
Parallel with the optical axis 35b that Thermal Infra-Red polarizes camera 31b.From target light beam 36 through Thermal Infra-Red polarization camera 31a and
Thermal Infra-Red polarization camera 31b respectively obtains the horizontal polarization thermal infrared images of same target and vertical thermal infrared images.Signal
Processor 37 gathers Thermal Infra-Red and polarizes the synchronous thermal infrared images of camera 31a and Thermal Infra-Red polarization camera 31b and located
Reason.After process, image has display 38 to show.
The present invention carries out spilled oil on water surface detection using thermal infrared polarization imaging, and thermal infrared imaging utilizes spilled oil on water surface and the water surface
Temperature contrast detecting oil spilling, polarization imaging utilizes the surface polarization characteristic difference detection oil spilling wheel of spilled oil on water surface and the water surface
Exterior feature, to strengthen the recognition effect in thermal infrared imaging oil spilling region using polarization information.
Skilled addressee readily understands that, on the premise of not conflicting, above-mentioned each advantageous manner can be freely
Combination, superposition.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (10)
1. a kind of spilled oil on water surface imaging detection method, comprising:
(1) same target is gathered respectively with the thermal infrared images i of horizontal polarization//Thermal infrared images i with vertical polarization⊥；
(2) calculate unpolarized thermal infrared images i0=i//+i⊥；
(3) calculate polarization differential thermal infrared images i1=| i//-i⊥|；
(4) to polarization differential thermal infrared images i1Processed, oil spilling region closed outline s is obtained using edge extracting methodi(i
=1,2 ...)；Described closed outline is the set of profile coordinate；
(5) pass through described oil spilling region closed outline to unpolarized thermal infrared images i0Carry out image enhancement processing.
2. the method for claim 1 is it is characterised in that the operating spectrum band of described thermal infrared images imaging is composed for thermal infrared
Section.
3., it is characterised in that also including, imaging angle is between 5 °～30 ° for the method for claim 1.
4. equipment as claimed in claim 1 it is characterised in that described by described oil spilling region closed outline to unpolarized heat
Infrared image i0Carry out image enhancement processing, comprising: to image i0Middle siInternal pixel is multiplied by enhancing coefficient a；
Wherein, described enhancing coefficient a be used for increase si inside and outside between contrast, and ensure si inside be unlikely to excessive
Saturation；
Wherein, if the image intensity value within si is less than outside gray value, a ＜ 1, if the image intensity value within si is high
In outside gray value, a ＞ 1.
5. a kind of spilled oil on water surface imaging detection equipment is it is characterised in that include two thermal infrared polarization cameras, signal processing units
And display unit, described in two of which, thermal infrared polarization camera is arranged side by side and points to same direction, one of described
Thermal infrared polarizes the linear polarization of camera, vertical with the linear polarization that thermal infrared another described polarizes camera；Two institutes
State thermal infrared polarization camera to be connected with described signal processing unit, for image is sent to described signal processing unit,
And processed by the image that described signal processing unit polarizes camera to two thermal infrareds, result is sent to institute
State display unit to show.
6. equipment as claimed in claim 5 is it is characterised in that the linear polarization of a described thermal infrared polarization camera is water
Square to the linear polarization that another described thermal infrared polarizes camera is vertical direction.
7. the equipment as described in claim 5 or 6 is it is characterised in that each described thermal infrared polarization camera includes edge successively
The linear polarizer of light path arrangement, thermal infrared camera lens, thermal infrared planar array detector.
8. equipment as claimed in claim 5 is it is characterised in that described signal processing unit is embedded computer or portable
Formula computer.
9. equipment as claimed in claim 5 is it is characterised in that described display unit can be liquid crystal display or portable meter
Calculation machine display screen.
10. equipment as claimed in claim 5 is it is characterised in that thermal infrared polarizes the optical axis of camera and the angle of sleep at 5 °
Between～30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889030.1A CN106370307A (en) | 2016-10-12 | 2016-10-12 | Method and device for water surface oil spill imaging detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889030.1A CN106370307A (en) | 2016-10-12 | 2016-10-12 | Method and device for water surface oil spill imaging detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257119A (en) * | 2018-01-08 | 2018-07-06 | 浙江大学 | A kind of immediate offshore area floating harmful influence detection method for early warning based near ultraviolet image procossing |
| CN108955891A (en) * | 2018-05-15 | 2018-12-07 | 北京华夏光谷光电科技有限公司 | Underwater self-spray heat source infrared imaging/photoelectric detecting system |
| CN110097562A (en) * | 2019-05-20 | 2019-08-06 | 哈尔滨工业大学（威海） | Offshore spilled oil area image detection method |
| CN110781860A (en) * | 2019-11-05 | 2020-02-11 | 大连海事大学 | Intelligent alarm system and method for monitoring oil spilling of offshore oil platform |
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| CN105628622A (en) * | 2014-11-07 | 2016-06-01 | 田佳聪 | Polarization imaging system based on three cameras |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005117452A1 (en) * | 2004-05-26 | 2005-12-08 | Olympus Corporation | Imaging system |
| CN101320138A (en) * | 2008-05-16 | 2008-12-10 | 中国科学院西安光学精密机械研究所 | Method and equipment for simultaneously acquiring stereo and multispectral image |
| US20140192209A1 (en) * | 2013-01-07 | 2014-07-10 | Apple Inc. | Parallel sensing configuration covers spectrum and colorimetric quantities with spatial resolution |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257119A (en) * | 2018-01-08 | 2018-07-06 | 浙江大学 | A kind of immediate offshore area floating harmful influence detection method for early warning based near ultraviolet image procossing |
| CN108257119B (en) * | 2018-01-08 | 2020-09-01 | 浙江大学 | Near-shore sea area floating hazardous chemical detection early warning method based on near-ultraviolet image processing |
| CN108955891A (en) * | 2018-05-15 | 2018-12-07 | 北京华夏光谷光电科技有限公司 | Underwater self-spray heat source infrared imaging/photoelectric detecting system |
| CN110097562A (en) * | 2019-05-20 | 2019-08-06 | 哈尔滨工业大学（威海） | Offshore spilled oil area image detection method |
| CN110097562B (en) * | 2019-05-20 | 2023-07-21 | 哈尔滨工业大学（威海） | Sea surface oil spill area image detection method |
| CN110781860A (en) * | 2019-11-05 | 2020-02-11 | 大连海事大学 | Intelligent alarm system and method for monitoring oil spilling of offshore oil platform |
| CN110781860B (en) * | 2019-11-05 | 2024-01-19 | 大连海事大学 | Intelligent oil spill monitoring alarm system and method for offshore oil platform |
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Application publication date: 20170201 |