A5101712362- Infrared Target Detection Methodologies
- Adaptive optics and wavefront sensing
- Optical Systems and Laser Technology
- Optical measurement and interference techniques
- Remote-Sensing Image Classification
- Ocular and Laser Science Research
- Semiconductor Lasers and Optical Devices
- Remote Sensing and Land Use
- Advanced Image Fusion Techniques
- Advanced Neural Network Applications
- Impact of Light on Environment and Health
- Optical Wireless Communication Technologies
- Advanced X-ray Imaging Techniques
- Digital Holography and Microscopy
- Advanced Algorithms and Applications
- Planetary Science and Exploration
- Magnesium Alloys: Properties and Applications
- Aluminum Alloy Microstructure Properties
- Space Exploration and Technology
- Neuroscience and Neural Engineering
- Advanced Measurement and Detection Methods
- Lung Cancer Treatments and Mutations
- Image Retrieval and Classification Techniques
- Satellite Image Processing and Photogrammetry
- Advanced Image and Video Retrieval Techniques
Liaoning Technical University
2023
Intelligent Health (United Kingdom)
2023
Beijing Aerospace Flight Control Center
2022
Chinese Academy of Sciences
2009-2020
Changchun Institute of Optics, Fine Mechanics and Physics
2009-2020
Jilian Technology Group (China)
2019
Institute of Optics and Electronics, Chinese Academy of Sciences
2016-2017
University of Chinese Academy of Sciences
2016
Chinese Academy of Social Sciences
2010
Beijing Academy of Social Sciences
2009
Launched on 2 June 2018, Luojia-1 satellite records night-time light imagery at 130 m resolution, which is higher than most of the existing images to date. This study evaluated radiometric and spatial properties for cities Los Angeles, Wuhan Rome as well change detection capability Zunyi city. For property, analysis shows that correlate with radiance Visible Infrared Imaging Radiometer Suite (VIIRS)'s Day Night Band (DNB), have a wider range values, values (e.g., 40%–90% higher) VIIRS DNB...
A phased sparse aperture system provides an economic solution to get high resolution images with less volume and weight. The crucial point of such systems is adaptive correction piston, that is, a close-loop control aiming at stabilizing the optical path differences within fraction wavelength. In this paper, we present autonomous phasing approach using stochastic parallel gradient descent algorithm through optimization image quality. synthetic can be by iteratively commanding piston...
Optical sparse aperture imaging shows great promise for the next generation of high resolution systems. In this paper, we propose and demonstrate an active approach using independent transmitter modulation to digitally overcome phasing errors, correct aberrations, further improve resolution. The reported scheme consists a general system illumination unit, specifically pattern projector. A series raw images are captured with projector scanned illuminate object. Based on acquired data set,...
The ship detection field faces many challenges due to the large-scale and high complexity of optical remote sensing images. Therefore, an innovative method that is simple, accurate, stable proposed in this paper. algorithm consists following two steps: 1) AdaBoost classifier, combined with Haar-like features, used rapidly extract candidate area slices, 2) according characteristics ships, a periphery-cropped network designed for verification. Furthermore, we analyze ocean images improve...
Luojia1-01 satellite is the first scientific experimental applied for night-time light remote sensing data acquisition, and payload an optical camera with high sensitivity, radiation measurement accuracy stable elements of interior orientation. At same time, a special shaped hood designed, which significantly improved ability to suppress stray light. Camera electronics adopts integrated design focal plane imaging processing, greatly reduces volume weight system. In this paper, summarized,...
Acquisition of information on ocean-going vessels is important for trade, shipping safety and assessing illegal behavior, so on. Optical remote sensing satellites have become the above tasks because its advantages a large swath width, high resolution independence from ground basic resources. Relying “Jilin-1” Spectrum 01/02 satellites, this paper proposes an on-board processing system ship acquisition studied with relevant methods. The main modules include data analysis, image preprocessing,...
For advancing the image quantity of multi-spectral and panchromatic images fusion, this paper presents an algorithm fusion based on characteristic imaging system. This firstly executes multi-resolution decomposition to adopting with Nonsubsample contourlet transform, then establishes injection model by analysising system in detail, injects detail information every spectrum model. At last, coefficient is reconstructed inverse nonsubsample transform so that final obtained. The experiment shows...
In this paper, our recently developed spatial modulation diversity technology (SMDT) is first used to correct the blurring and restore lost midband contrast of synthetic images based upon an actual sparsely filled aperture system, specifically a binocular telescope testbed consisting two horizontally arranged collector telescopes with 127 mm diameter. Synthetic are obtained cophased by optimization algorithm. Diversity generated using electronic shutter modulate transmittance each...
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The optical multi-aperture imaging system is an effective way to magnify the aperture and increase resolution of telescope system, difficulty which lies in detecting correcting co-phase error. This paper presents a method based on stochastic parallel gradient decent algorithm (SPGD) correct Compared with current method, SPGD can avoid analyzed influence piston error tilt image quality double-aperture introduced basic principle algorithm, discuss algorithm’s key parameters (the gain...
We propose and demonstrate a method of spatially overlapping diversity technology for wavefront sensing image restoration with undersampled systems, which can handle extended objects illuminated by incoherent light. The technique first scans smaller subaperture across the large pupil systems to generate several properly sampled images. Then, nonlinear optimization is used joint reconstruction object. Simulations performed different phase distributions initially validate technique....
The next generation of optical sparse aperture systems will provide high angular resolution for astronomical observations. Spatial modulation diversity (SMD) is a newly developed post-processing technique such telescopes, faced with challenges imaging faint objects, which are very attractive astronomers but always make raw images suffer serious photon noise. In this paper, we propose an improved SMD denoising reprocessing embedded to address the problem. blocking-matching and 3D filtering...
A Strategy of Real-Time Adjusting Yaw Angle (SRTAYA) space camera was proposed base on General Image-Quality Equation (GIQE). During imaging, yaw angle which is caused by rotation the earth and gesture changing satellite impacts integral aspect TDI (Time Delay Integration) CCD (Charge Couple Device), so that image quality degrades. For extending imaging time enhancing quality, must be adjusted. The descending value GIQE reflects degrading quantity quality. SRTAYA calculated an acceptable...
介绍了卫星导航信号的构成及传统GPS (全球定位系统) 接收机的工作原理, 并将近年来受到广泛关注的软件无线电技术引入到GNSS (全球卫星导航系统) 接收领域, 形成了一种多系统兼容, 高度灵活, 可升级的GNSS 接收机新架构. 给出了满足小卫星平台需求的FPGA + DSP 的数字处理模块硬件架构以及接收机的软件参考结构. 论述了多系统软件无线电GNSS 接收机在小卫星平台中应用时存在的优势和不足, 以及在星载一体化小卫星中的应用前景.
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The prognostic value of neutrophil/lymphocyte ratio (NLR) for HER2-positive metastatic breast cancer (MBC) is not well studied. This study aims to evaluate the role baseline NLR in MBC patients treated with trastuzumab/pertuzumab. clinical data 780 from CLEOPATRA were applied VIVLI platform, and 248 HER2-postive collected six local hospitals. Propensity score matching (PSM) inverse probability treatment weighting (IPTW) analyses used control bias. associations between clinicopathological...
To tackle the challenges related to inadequate extraction of multi-scale information and subsequent decline in segmentation accuracy within UNet framework for remote sensing image semantic tasks, we introduce a novel approach built upon UNet. Firstly, incorporate an attention mechanism module into encoder section dynamically emphasize various regions channels input image. This augmentation enhances network's perceptual capacity crucial features. Secondly, improved dilated spatial pyramid...
A new concept of satellites laser interconnect was proposed based on the human bionics. Three steps were used to set up optical link just as eyes.
As a result of comparative study on human visual and Free Space Optical (FSO) communication, new concept satellites laser interconnect was proposed based bionics. For the link is difficult to set up directly, given out three processes capturing objectives: voice assisting guide, eyes' wide Field Of View (FOV) cursory foveal FOV high-resolution imaging. Three similar were introduced spaceborne which radio beacons communication narrow capturing, so that difficulty setting optical reduced...
Based on Electro-Optical (E-O) effect, the interferometer is static and polarization-transparent. Using voltage scan to replace mechanical modulates Optical Path Difference (OPD) without movement. Depending study of Tymon Barwicz, MIT, a special design makes A method given compensate optical dispersion E-O material. In end, spectrometer composed this in 550nm band with spectral resolution up 1 nanometer.
A Multi-Step Gain Adjusting Strategy (MSGAS) of space camera was proposed, which used to get higher SNR (Signal-Noise Rate) image. When the working in poor light condition, CCD signal so weak that it's difficult a clear image, reduce quantization noise and improve SNR, we must amplify first then quantize. The MSGAS achieved by adjusting gain (Charge Couple Device) processor step step, upper limit lower were set, if MDN (Mean Digital Number) fixed length image data not between limit, adjusted...