WO2015007065A1 - 一种降低tdi-ccd相机图像模糊度的方法 - Google Patents
一种降低tdi-ccd相机图像模糊度的方法 Download PDFInfo
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- WO2015007065A1 WO2015007065A1 PCT/CN2013/090175 CN2013090175W WO2015007065A1 WO 2015007065 A1 WO2015007065 A1 WO 2015007065A1 CN 2013090175 W CN2013090175 W CN 2013090175W WO 2015007065 A1 WO2015007065 A1 WO 2015007065A1
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- image
- signal sequence
- tdi
- ccd camera
- neighborhood
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000000694 effects Effects 0.000 claims abstract description 14
- 244000145845 chattering Species 0.000 claims abstract description 12
- 230000008030 elimination Effects 0.000 claims abstract description 3
- 238000003379 elimination reaction Methods 0.000 claims abstract description 3
- 108010076504 Protein Sorting Signals Proteins 0.000 claims description 57
- 230000010354 integration Effects 0.000 claims description 8
- 238000012937 correction Methods 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims description 3
- 238000011867 re-evaluation Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/73—Deblurring; Sharpening
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/50—Image enhancement or restoration using two or more images, e.g. averaging or subtraction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
- H04N25/711—Time delay and integration [TDI] registers; TDI shift registers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20076—Probabilistic image processing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20172—Image enhancement details
- G06T2207/20201—Motion blur correction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30181—Earth observation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30212—Military
Definitions
- the invention belongs to the field of image processing, and particularly relates to the determination of fuzzy parameters of aerial remote sensing images based on TDI-CCD cameras and the elimination of blurred images of aerial remote sensing images.
- High-resolution remote sensing images are widely used in various fields such as reconnaissance, geographic information systems, digital cities, and road construction.
- An imaging device with a time delay integration charge coupled device (hereinafter referred to as TDI-CCD) mounted on an aerospace or aerospace vehicle at home and abroad is called a TDI-CCD camera.
- the TDI-CCD camera adopts a technique of integrating the same instantaneous field of view radiation energy m times on the ground, which is equivalent to increasing the exposure time of the same instantaneous field of view from T to mT, but does not need to reduce the flight speed of the aircraft. With this feature of the TDI-CCD camera, images with higher geometric resolution than images obtained with one-time integration technique can be obtained.
- the structure of the TDI-CCD is a rectangular CCD area array with a large aspect ratio, which is functionally equivalent to a linear array CCD.
- the important premise of TDI-CCD camera for obtaining high-quality images is that m CCD pixels with delay integral logic relationship must correspond to the same instantaneous field of view, but the vibration of remote sensing platforms such as satellites and airplanes makes the TDI-CCD camera image environment This requirement is not met.
- the satellite in operation has low frequency vibration caused by rigid body motion and intermediate frequency to high frequency vibration caused by the operation of the satellite's cabin payload attitude control component, such as vibration caused by the movement of the solar panel windsurfing, flywheel or control moment gyro Vibration caused by dynamic imbalance.
- the vibration of a satellite caused by a disturbance may be the vibration of a certain component, or the coupled vibration of several components, or the vibration of the entire satellite.
- the TDI-CCD camera mounted on the satellite is affected by the vibration, which is represented by the six external orientation elements of the camera (space position (X, Y, ⁇ ), the roll angle around the x, y, and ⁇ axes, the pitch angle, The yaw of the yaw angle).
- the m-level integral of the TDI-CCD camera during remote sensing imaging corresponds to m ground instantaneous field of view energy. If the influence of the instantaneous field of view change on the image blur in one integration time is neglected, and the instantaneous field of view in the ideal state without vibration is taken as the true position, then the actual obtained m ground instantaneous field of view and the true position have different degrees of misalignment error.
- this misalignment error we go into one
- the step is decomposed into the following three components: the front (rear) misalignment in the TDI-CCD integration direction (the forward direction of the aircraft); the left and right direction misalignment perpendicular to the TDI-CCD integration direction; and the rotational misalignment around the vertical axis.
- the processing methods for image blurring are roughly direct algorithms and blind restoration algorithms (iterative algorithms).
- the direct algorithm extracts the motion function from the image itself.
- this method results in the complexity and irregularity of the vibration aftereffect due to the randomness of the excitation time of various vibration sources. This makes the inversion algorithm inaccurate, and the effect of deblurring is not satisfactory.
- the blind restoration algorithm does not need to know the point spread function in advance, but this algorithm needs to estimate the point spread function initially, and the accuracy of the estimation has uncertainty, and can not obtain better deblurring effect.
- the present invention proposes a new TDI-CCD camera signal transmission process, and provides a new data processing method for this process:
- the target surface of the TDI-CCD camera used in the present invention is n columns and m rows, and the steps are as follows:
- Decompose the image of the area array Decompose each image read by S2 according to the line, and the area array image output by each integration level is decomposed into m lines, each line has n pixels, after decomposing, each line is formed.
- a one-dimensional digital signal having a signal length of n, extracting the first N pixels for each one-dimensional digital signal, respectively forming a one-dimensional digital signal sequence recorded as f(t), where 0 ⁇ t ⁇ m, 0 ⁇ N ⁇ n .
- the signal sequence f (i) is selected as a reference sequence, and the signal sequence f (j) is compared with the reference signal sequence, and the neighborhood matching condition of the signal sequence is: 11 ⁇ _ 3 ⁇ 4 1 ⁇ 5 , where ill represents a standard
- the number represents the difference vector of any two pixels in the two-line signal sequence, 1 represents the index of the pixel in the signal sequence f (i), and j represents the index of the pixel in the signal sequence f (j), ! ⁇ is a neighborhood of 1 , 1 is the neighborhood of j;
- ⁇ a 00 +& 103 ⁇ 4 +& 0 ⁇ 2 +& 11 ⁇ 2 ⁇ 2 +3 ⁇ 403 ⁇ 4 + 233 ⁇ 4
- k is a neighborhood of i that conforms to a matching condition
- 1 is a neighborhood of j that conforms to a matching condition.
- the number of iterations r of S43 satisfies l ⁇ r ⁇ N.
- Figure 1 shows the established planar image coordinate system.
- Figure 2 is a cross-sectional view showing the correspondence between m images and ground targets in the ideal working mode of the TCI-CCD camera.
- Figure 3 is a cross-sectional view showing the correspondence between m images and ground targets under the condition of TCI-CCD camera vibration.
- Figure 4 is a flow chart for calculating the offset of similar line signals in the t + 1 image and the t th image.
- FIG. 5 is a schematic diagram of a workflow for restoring a vibrating image by the method.
- TDI-CCD camera For the convenience of description, we select a TDI-CCD camera with a column cell number of 1024 and a row cell number of 32.
- the direction of the number of pixels in the TDI-CCD camera array is the Y axis
- the direction of the pixel series is the X axis
- the upper left corner of the image is the starting point of the coordinate system, where the first The coordinates of the first column are (0, 0).
- the integral level of the TDI-CCD camera is set to 1, and an array of 32 rows and 1024 columns of area images is output for each level.
- the area array images are numbered sequentially (3 ⁇ 4, 0 2 , (3 ⁇ 4.. ..Q) , o sets the reference image as a reference, where is the pixel gray value of G t at ( , y t ).
- each image of the area array Decompose each image of the area array read by S2 by line, and the image of the area array output by each integration level is decomposed into 32 lines, each line has 1024 pixels, after decomposing, each line Forming a one-dimensional digital signal, the signal length is 1024, extracting the first 100 pixels for each one-dimensional digital signal, respectively forming a one-dimensional digital signal sequence recorded as f(t), and the one-dimensional digital signal sequence length is 100;
- the neighborhood of the signal sequence always matches The condition is
- the index of the cell, j represents the index of the cell in the signal sequence f(j), k is the neighborhood of i, and 1 is the neighborhood of j.
- p is the initial match Rate
- + represents the gray value of the one-dimensional signal sequence f(i) at the i +th pixel
- g 2 (j+A) represents the one-dimensional signal sequence f(j) at the j+Ath pixel Gray value.
- the normalized matching probability p: p is obtained, where h represents all points that match i.
- the digital signal sequence f(2,0:99,: and the reference signal sequence) composed of the first 100 pixels of the 2nd line of 0 2 f (2,0: 99, for similarity comparison, this comparison if
- the corresponding point in the corresponding name is gl (l,0: ;
- the first 100 pixel digital signal sequence consisting of the first row f 0 2 1 (l, 0: 99 ,: the reference signal sequence f (2,0: 99, for similarity comparison, this comparison if
- the corresponding point in the corresponding name is gl (l, 0;;
- the loop comparison is performed in the neighborhood corresponding to the reference signal, and the correspondence between the first corresponding point of the same name & ( 1 ⁇ 4) and g 2 ( , y 2 ) is established by comparing the reference signal sequence with the adjacent sequence of the next image.
- G 2 is used as a reference reference image coordinate system for geometric correction and pixel interpolation of G 3 , and then combined with the obtained spatial relationship of 0 2 and (3 ⁇ 4 is based on correction, and so on. , Correct (3 ⁇ 4, 0 5 , 0 6 ... 0 32 ).
- the rate, E in (x, y), represents the radiant energy per unit area per unit time of the band, and k is the gain coefficient.
- Each line of digital images that have been degraded by the effects of chattering is arranged in spatial and temporal order, ultimately resulting in a digital image that reduces the effects of chattering.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Studio Devices (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2918511A CA2918511A1 (en) | 2013-07-18 | 2013-12-22 | A method for reducing blur of tdi-ccd camera images |
US14/905,866 US9654706B2 (en) | 2013-07-18 | 2013-12-22 | Method for reducing image fuzzy degree of TDI-CCD camera |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310302808.0 | 2013-07-18 | ||
CN2013103028080A CN103400345A (zh) | 2013-07-18 | 2013-07-18 | 一种降低tdi-ccd相机图像模糊度的方法 |
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WO2015007065A1 true WO2015007065A1 (zh) | 2015-01-22 |
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PCT/CN2013/090175 WO2015007065A1 (zh) | 2013-07-18 | 2013-12-22 | 一种降低tdi-ccd相机图像模糊度的方法 |
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US (1) | US9654706B2 (zh) |
CN (2) | CN103400345A (zh) |
CA (1) | CA2918511A1 (zh) |
WO (1) | WO2015007065A1 (zh) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103400345A (zh) * | 2013-07-18 | 2013-11-20 | 西南交通大学 | 一种降低tdi-ccd相机图像模糊度的方法 |
CN103646384B (zh) * | 2013-12-20 | 2016-06-22 | 江苏大学 | 一种遥感扫描成像平台飞行速度的优化方法 |
CN103983343B (zh) * | 2014-05-29 | 2016-05-11 | 武汉大学 | 一种基于多光谱影像的卫星平台震颤检测方法及系统 |
CN106791508B (zh) * | 2016-12-26 | 2019-06-14 | 首都师范大学 | 一种数字域tdi相机成像质量的调整方法及调整系统 |
US10909670B2 (en) | 2018-12-06 | 2021-02-02 | Massachusetts Institute Of Technology | Computational reconfigurable imaging spectrometer |
WO2020117245A1 (en) * | 2018-12-06 | 2020-06-11 | Massachusetts Institute Of Technology | Computational reconfigurable imaging spectrometer |
CN110220475B (zh) * | 2019-05-30 | 2021-01-26 | 电子科技大学 | 一种基于图像分割的线性ccd二维变速成像方法 |
CN111324857B (zh) * | 2020-03-19 | 2022-03-04 | 武汉大学 | 一种基于tdiccd推扫特性的快速反变换计算方法 |
CN111445404A (zh) * | 2020-03-23 | 2020-07-24 | 上海数迹智能科技有限公司 | 一种基于双频和概率模型的相位去模糊方法 |
CN111679099B (zh) * | 2020-06-17 | 2022-08-30 | 中国科学院空天信息创新研究院 | 基于相干光视觉光流检测的加速度计标定方法及装置 |
CN112212833B (zh) * | 2020-08-28 | 2021-07-09 | 中国人民解放军战略支援部队信息工程大学 | 机械拼接型tdi ccd推扫相机整体几何平差方法 |
CN112087622B (zh) * | 2020-09-15 | 2022-06-17 | 大连海事大学 | 一种tdi-ccd相机反射率分辨率指标模拟测试方法及系统 |
CN116156342B (zh) * | 2023-04-04 | 2023-06-27 | 合肥埃科光电科技股份有限公司 | 多线阵图像传感器拼接方法、线阵采像系统及装置 |
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CN101742050A (zh) * | 2009-12-03 | 2010-06-16 | 浙江大学 | 针对运动模糊核空间移变的tdiccd图像复原方法 |
CN103115631A (zh) * | 2013-01-25 | 2013-05-22 | 西安电子科技大学 | 遥感相机成像参数误差校正系统及方法 |
CN103400345A (zh) * | 2013-07-18 | 2013-11-20 | 西南交通大学 | 一种降低tdi-ccd相机图像模糊度的方法 |
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WO2007067999A2 (en) * | 2005-12-09 | 2007-06-14 | Amnis Corporation | Extended depth of field imaging for high speed object analysis |
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CN102156990B (zh) * | 2011-04-02 | 2013-12-11 | 北京理工大学 | 一种tdi-ccd航空遥感图像模糊参数的自动辨识方法 |
DE102012000862A1 (de) * | 2012-01-13 | 2013-07-18 | Carl Zeiss Sports Optics Gmbh | Fernoptisches Gerät mit Bildstabilisierung und verbesserter Schwenkdetektion |
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- 2013-07-18 CN CN2013103028080A patent/CN103400345A/zh not_active Withdrawn
- 2013-12-04 CN CN201310646775.1A patent/CN103632349B/zh active Active
- 2013-12-22 US US14/905,866 patent/US9654706B2/en active Active
- 2013-12-22 CA CA2918511A patent/CA2918511A1/en not_active Abandoned
- 2013-12-22 WO PCT/CN2013/090175 patent/WO2015007065A1/zh active Application Filing
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CN101742050A (zh) * | 2009-12-03 | 2010-06-16 | 浙江大学 | 针对运动模糊核空间移变的tdiccd图像复原方法 |
CN103115631A (zh) * | 2013-01-25 | 2013-05-22 | 西安电子科技大学 | 遥感相机成像参数误差校正系统及方法 |
CN103400345A (zh) * | 2013-07-18 | 2013-11-20 | 西南交通大学 | 一种降低tdi-ccd相机图像模糊度的方法 |
CN103632349A (zh) * | 2013-07-18 | 2014-03-12 | 西南交通大学 | 一种降低tdi-ccd相机图像模糊度的方法 |
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CN103400345A (zh) | 2013-11-20 |
CN103632349B (zh) | 2017-02-08 |
CA2918511A1 (en) | 2015-01-22 |
US20160165155A1 (en) | 2016-06-09 |
CN103632349A (zh) | 2014-03-12 |
US9654706B2 (en) | 2017-05-16 |
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