CN109903244A - A kind of real-time infrared image restored method - Google Patents
A kind of real-time infrared image restored method Download PDFInfo
- Publication number
- CN109903244A CN109903244A CN201910130007.8A CN201910130007A CN109903244A CN 109903244 A CN109903244 A CN 109903244A CN 201910130007 A CN201910130007 A CN 201910130007A CN 109903244 A CN109903244 A CN 109903244A
- Authority
- CN
- China
- Prior art keywords
- image
- computer
- detector
- optical system
- target
- 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
- Radiation Pyrometers (AREA)
- Image Processing (AREA)
Abstract
The present invention proposes a kind of real-time infrared image restored method, it is characterised in that: the realization system of real-time infrared image restored method includes: target, knife, optical system, diaphragm, the photosurface of detector, driving circuit, computer；Wherein, the photosurface of the target, optical system and detector is coaxial, and the photosurface of detector is on the focal plane of optical system；Knife is moved along the optical axis direction of vertical optical system；The first step, computer control driving circuit and the acquisition image for receiving the target；Second step calculates degenrate function according to acquired image；Third step calculates liftering according to degenrate function, carries out image restoration.This method is found out the expression formula of infrared image recovery, the real-time recovery of infrared image is realized using the powerful computing capability of computer and the real-time of FPGA according to the basic principle of infrared imaging.
Description
Technical field
The present invention relates to the image restoration of image procossing and rebuild field, in particular to a kind of real-time infrared image recovery side
Method.
Background technique
The various systems such as infrared acquisition, search, tracking require that infrared image can faithfully react target and background.It is real
On border, it is more low to be limited to the physical characteristic of infrared wavelength, the technological level of infrared detector, the cutoff frequency of infrared optical system
Factor causes modulation transfer function (MTF) cutoff frequency of infrared imaging system very low, has higher transfer infrared image can not
It being capable of clear, fine and smooth ground reproducing target and background as visible light.
The present invention proposes a kind of utilization infrared imaging restored method.This method is special using the transmission function of infrared imaging system
The powerful processing capacity of property and FPGA, the real-time recovery of Lai Shixian infrared image.
Summary of the invention
Steps are as follows for a kind of realization of real-time infrared image restored method:
The first step builds real-time infrared image restored method system
A kind of system of real-time infrared image restored method includes: target, knife, optical system, diaphragm, detector
Photosurface, driving circuit, computer.
The photosurface of target, optical system and detector is coaxial, and the photosurface of detector is in the focal plane of optical system
It is upper；Knife is moved along the optical axis direction of vertical optical system.The no quantitative requirement of installation of other compositions.
The effect of target is to provide scene known to frequency characteristic.The main function of knife is that control enters optical system
Amount of light and direction；The major function of optical system is to collect the radiation energy of scenery, and the energy of scenery and its divide
Cloth is mapped on focal plane；Optical system can also determine size, power etc. of the scenery on focal plane.The effect of diaphragm is control
The number of imaging ray, direction.The effect of detector is accumulation infra-red radiation generation charge, and with the shape of voltage (or electric current etc.)
Formula output.The effect of driving circuit is to receive computer instruction, control detector work；The analog signal that detector is exported,
Computer is transferred to after composograph.The effect transmission of computer is instructed, is received, showing image and calculate degenrate function.
Second step powers on, computer control driving circuit and the infrared image for receiving driving circuit output
Third step calculates degenrate function according to the image of acquisition
The Fundamentals of Mathematics expression formula of degenrate function is as follows.
The imaging process of infrared system can be stated with (1) formula:
g(x,y)=h(x,y)*f(x,y) (1)
Wherein, f(x,y)It is in the method target for the mathematical notation of input picture；
g(x,y)For the mathematical notation for exporting image, the image arrived in the method for computer acquisition；
h(x,y)For degenrate function.
(1) formula is converted into the expression formula of frequency domain are as follows:
G(u,v)=H(u,v)F(u,v) (2)
Wherein, F(u,v)For f(x,y)Fourier transformation expression formula；
G(u,v)For g(x,y)Fourier transformation expression formula；
H(u,v)For h(x,y)Fourier transformation expression formula.
In the realization of this method, first by the image of target, computer acquisition to image carry out Fourier transformation respectively；
Then degenrate function is acquired according to (2) formula.
4th step calculates liftering according to degenrate function, carries out image restoration
When infrared imaging system in actual work, according to degenrate function H(u,v)Carry out liftering:
Wherein,For the Fourier transformation expression formula of actual scene；
For the Fourier transformation expression formula of real image.
Wherein,For the mathematical notation of actual scene；
Ft () indicates inverse Fourier transform.
Wherein,For the mathematical notation of restored image；
Lt () indicates geometric linear transformation.
Detailed description of the invention
Fig. 1 is the schematic diagram of real-time infrared image recovery system；
1. 6. driving circuit 7. of photosurface of 4. diaphragm of target 2. knife, 3. optical system, 5. detector calculates
Machine
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.
A kind of real-time infrared image restored method specific implementation step is as follows:
Real-time infrared image recovery system is built, the system of the real-time infrared image restored method includes: target, the edge of a knife
Instrument, optical system, diaphragm, the photosurface of detector, driving circuit, computer.
Guarantee that the photosurface of target, optical system and detector is coaxial when building system, and the photosurface of detector is in light
On the focal plane of system, knife is moved along the optical axis direction of vertical optical system.The installation of other component is not wanted quantitatively
It asks.
The effect of target is to provide scene known to frequency characteristic.The main function of knife is that control enters optical system
Amount of light and direction；The major function of optical system is to collect the radiation energy of scenery, and the energy of scenery and its divide
Cloth is mapped on focal plane；Optical system can also determine size, power etc. of the scenery on focal plane.The effect of diaphragm is control
The number of imaging ray, direction.The effect of detector is accumulation infra-red radiation generation charge, and with the shape of voltage (or electric current etc.)
Formula output.The effect of driving circuit is to receive computer instruction, control detector work；The signal of conversion detector, composite diagram
Computer is transferred to as after.The effect transmission of computer is instructed, is received, showing image and calculate degenrate function.
The first step powers on, computer control driving circuit and the acquisition image for receiving target
Second step calculates degenrate function according to the image of acquisition
The Fundamentals of Mathematics expression formula of degenrate function is as follows.
The imaging process of infrared system can be stated with (1) formula:
g(x,y)=h(x,y)*f(x,y) (1)
Wherein, f(x,y)It is in the method target for the mathematical notation of input picture；
g(x,y) it is the mathematical notation for exporting image, the image arrived in the method for computer acquisition；
h(x,y)For degenrate function.
(1) formula is converted into the expression formula of frequency domain are as follows:
G(u,v)=H(u,v)F(u,v) (2)
Wherein, F(u,v)For f(x,y)Fourier transformation expression formula；
G(u,v)For g(x,y)Fourier transformation expression formula；
H(u,v)For h(x,y)Fourier transformation expression formula.
In the method, first by the image of target, computer acquisition to image carry out Fourier transformation respectively；Then root
Degenrate function is acquired according to (2) formula.
Third step calculates liftering according to degenrate function, carries out image restoration.
When infrared imaging system in actual work, according to degenrate function H(u,v)Carry out liftering:
Wherein,For the Fourier transformation expression formula of actual scene；
For the Fourier transformation expression formula of real image.
Wherein,For the mathematical notation of actual scene；
Ft () indicates inverse Fourier transform.
Wherein,For the mathematical notation of restored image；
Lt () indicates geometric linear transformation.
5th step is transplanted to the algorithm and coefficient of (2)-(5) formula in the FPGA of driving circuit, to guarantee real-time.
So far, the recovery of infrared image is completed.
Claims (6)
1. a kind of real-time infrared image restored method, it is characterised in that: the realization system of real-time infrared image restored method includes:
Target, knife, optical system, diaphragm, the photosurface of detector, driving circuit, computer；Wherein, the target, light
The photosurface of system and detector is coaxial, and the photosurface of detector is on the focal plane of optical system；Knife is along vertical
The optical axis direction of optical system is mobile；
Wherein, the target is used to provide scene known to frequency characteristic,
The knife is used to control the amount of light into optical system and direction；
The optical system collects the radiation energy of scenery, and on the energy and its distribution map to focal plane of scenery；
The diaphragm be used for control imaging ray number, direction；
The detector generates charge for accumulating infra-red radiation, and exports as electronic signals；
The support circuit is for receiving computer instruction, control detector work；The signal of conversion detector, after composograph
It is transferred to computer；
The computer is instructed, is received, showing image and calculate degenrate function for sending；
It the described method comprises the following steps:
The first step, computer control driving circuit and the acquisition image for receiving the target；
Second step calculates degenrate function according to acquired image；
Third step calculates liftering according to degenrate function, carries out image restoration.
2. the method according to claim 1, wherein being moved back in the second step according to acquired image calculating
Change function include: by the image of target, computer acquisition to image carry out Fourier transformation respectively；Then according to (1), (2),
(2 ') formula acquires degenrate function:
The imaging process of infrared system can be stated with 1) formula:
g(x,y)=h(x,y)*f(x,y) (1)
Wherein, f(x,y)It is in the method target for the mathematical notation of input picture；
g(x,y)For the mathematical notation for exporting image, the image arrived in the method for computer acquisition；
h(x,y)For degenrate function；
(1) formula is converted into the expression formula of frequency domain are as follows:
G(u,v)=H(u,v)F(u,v) (2)
Wherein, F(u,v)For f(x,y)Fourier transformation expression formula；
G(u,v)For g(x,y)Fourier transformation expression formula；
H(u,v)For degenrate function h(x,y)Fourier transformation expression formula.
3. according to the method described in claim 2, calculate liftering according to degenrate function it is characterized in that, in the third step,
Carrying out image restoration includes:
According to degenrate function H(u,v)Carry out liftering:
Wherein,For the Fourier transformation expression formula of actual scene；
For the Fourier transformation expression formula of real image；
Wherein,For the mathematical notation of actual scene；
Ft () indicates inverse Fourier transform；
Wherein,For the mathematical notation of restored image；
Lt () indicates geometric linear transformation.
4. a kind of real-time infrared image recovery system, which is characterized in that the real-time infrared image recovery system include: target,
Knife, optical system, diaphragm, the photosurface of detector, driving circuit, computer；Wherein, the target, optical system and
The photosurface of detector is coaxial, and the photosurface of detector is on the focal plane of optical system；Knife is along vertical optical system
Optical axis direction it is mobile；
Wherein, the target is used to provide scene known to frequency characteristic,
The knife is used to control the amount of light into optical system and direction；
The optical system collects the radiation energy of scenery, and on the energy and its distribution map to focal plane of scenery；
The diaphragm be used for control imaging ray number, direction；
The detector generates charge for accumulating infra-red radiation, and is exported in the form of electric signal pressure or electric current；
The driving circuit is for receiving computer instruction, control detector work；The signal of conversion detector, after composograph
It is transferred to computer；
The computer is instructed, is received, showing image and calculate degenrate function for sending；
Wherein, the computer controls driving circuit and receives acquisition image；Degenrate function is calculated according to acquired image；Root
Liftering is calculated according to degenrate function, carries out image restoration.
5. system according to claim 4, which is characterized in that according to acquired image calculate degenrate function include: by
The image of target, computer acquisition to image carry out Fourier transformation respectively；Then it acquires and moves back according to (1), (2), (2 ') formula
Change function；
The imaging process of infrared system can be stated with 1) formula:
g(x,y)=h(x,y)*f(x,y) (1)
Wherein, f(x,y)It is in the method target for the mathematical notation of input picture；
g(x,y)For the mathematical notation for exporting image, the image arrived in the method for computer acquisition；
h(x,y)For degenrate function；
(1) formula is converted into the expression formula of frequency domain are as follows:
G(u,v)=H(u,v)F(u,v) (2)
Wherein, F(u,v)For f(x,y)Fourier transformation expression formula；
G(u,v)For g(x,y)Fourier transformation expression formula；
H(u,v)For degenrate function h(x,y)Fourier transformation expression formula.
6. according to the method described in claim 5, it is characterized in that, calculating liftering, progress image restoration according to degenrate function
Include:
According to degenrate function H(u,v)Carry out liftering:
Wherein,For the Fourier transformation expression formula of actual scene；
For the Fourier transformation expression formula of real image；
Wherein,For the mathematical notation of actual scene；
Ft () indicates inverse Fourier transform；
Wherein,For the mathematical notation of restored image；
Lt () indicates geometric linear transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130007.8A CN109903244A (en) | 2019-02-21 | 2019-02-21 | A kind of real-time infrared image restored method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130007.8A CN109903244A (en) | 2019-02-21 | 2019-02-21 | A kind of real-time infrared image restored method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109903244A true CN109903244A (en) | 2019-06-18 |
Family
ID=66945200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910130007.8A Pending CN109903244A (en) | 2019-02-21 | 2019-02-21 | A kind of real-time infrared image restored method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109903244A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606130A (en) * | 2013-10-22 | 2014-02-26 | 中国电子科技集团公司第二十八研究所 | Infrared degraded image adaptive restoration method |
| CN106127700A (en) * | 2016-06-17 | 2016-11-16 | 中国电子科技集团公司第二十八研究所 | One stares infrared degraded image adaptive restoration method |
| US20180218483A1 (en) * | 2015-08-19 | 2018-08-02 | Canon Kabushiki Kaisha | Image processing apparatus, image capturing apparatus, and storage medium |
| CN108765505A (en) * | 2018-04-28 | 2018-11-06 | 天津大学 | The coding of infrared imaging perceives matrix estimation method |
-
2019
- 2019-02-21 CN CN201910130007.8A patent/CN109903244A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606130A (en) * | 2013-10-22 | 2014-02-26 | 中国电子科技集团公司第二十八研究所 | Infrared degraded image adaptive restoration method |
| US20180218483A1 (en) * | 2015-08-19 | 2018-08-02 | Canon Kabushiki Kaisha | Image processing apparatus, image capturing apparatus, and storage medium |
| CN106127700A (en) * | 2016-06-17 | 2016-11-16 | 中国电子科技集团公司第二十八研究所 | One stares infrared degraded image adaptive restoration method |
| CN108765505A (en) * | 2018-04-28 | 2018-11-06 | 天津大学 | The coding of infrared imaging perceives matrix estimation method |
Non-Patent Citations (4)
| Title |
|---|
| 吴雪垠 等: ""逆滤波法在图像复原中的应用"", 《信息技术》 * |
| 李铁成: ""基于倾斜刃边法的遥感图像调制传递函数计算及图像复原技术研究"", 《中国博士学位论文全文数据库信息科技辑》 * |
| 胡涛 等: ""基于MTF的红外遥感图像复原"", 《光学与光电技术》 * |
| 郑筱晟 等: ""基于刀口法的视频内窥镜调制传递函数测量"", 《光学与光电技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108919244B (en) | Microwave photon all-band radar detection method and microwave photon all-band radar | |
| US8442342B2 (en) | Generation of image data with correction for optical misfocus utilizing fractional powers of the fourier transform operator | |
| CN101241173B (en) | Infrared stereoscopic vision thermal image method and its system | |
| JP3191928B2 (en) | Image input / output device | |
| CN111753977B (en) | Optical neural network convolution layer chip, convolution calculation method and electronic equipment | |
| CN102081219A (en) | In-orbit automatic focusing method for space CCD (charge coupled device) optical remote sensor | |
| CN109768829A (en) | Atmospheric turbulance distortion compensating system and its method in orbital angular momentum optical transport | |
| CN102750247B (en) | Signal processing platform applicable to multi-sensor self-adaption optical system | |
| CN109903244A (en) | A kind of real-time infrared image restored method | |
| CN112824934B (en) | TOF multipath interference removal method, system, equipment and medium based on modulated light field | |
| CN110827355A (en) | Moving target rapid positioning method and system based on video image coordinates | |
| CN102564614B (en) | Dynamic measurement method and instrument of laser spots | |
| CN108180867B (en) | Quantitative phase measurement method, device and system | |
| US10755135B2 (en) | Computational imaging device and method for improved corner detection | |
| CN113406654B (en) | ITOF (integrated digital imaging and optical imaging) distance measuring system and method for calculating reflectivity of measured object | |
| CN116222969A (en) | Dynamic line frequency matching simulation device in TDI CCD large attitude angle push broom imaging process | |
| CN204442567U (en) | A kind of digital picture real-time display system based on industrial computer platform | |
| CN102109413B (en) | Uniformity measuring system and method | |
| CN107155097A (en) | Focus adjustment method, focus control and the projection terminal of projection terminal | |
| CN112689124B (en) | Three-dimensional image intelligent monitoring cabinet and microcomputer intelligent monitoring device and method | |
| CN111736146A (en) | Bistatic pre-detection tracking method and device based on speed filtering | |
| CN116977826B (en) | Reconfigurable neural network target detection method under edge computing architecture | |
| Chen et al. | Solar radiation nowcasting through advanced CNN model integrated with ResNet structure | |
| CN113814953B (en) | Track automatic leveling method and system of inspection robot and electronic equipment | |
| Umbitaliev et al. | Total adaptation is an important trend of imaging systems development |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190618 |
|
| WD01 | Invention patent application deemed withdrawn after publication |