A5071145578- Advanced Optical Sensing Technologies
- Optical Coherence Tomography Applications
- Optical Imaging and Spectroscopy Techniques
- Photoacoustic and Ultrasonic Imaging
- Technology and Human Factors in Education and Health
- Underwater Vehicles and Communication Systems
- Image Enhancement Techniques
- Advanced Fluorescence Microscopy Techniques
- Remote Sensing and LiDAR Applications
- Water Quality Monitoring Technologies
- Advanced Vision and Imaging
- Optical measurement and interference techniques
- Advanced Image Fusion Techniques
- Water Quality Monitoring and Analysis
- Ocular and Laser Science Research
Wuhan Institute of Technology
2024
Institute of Semiconductors
2014-2017
Chinese Academy of Sciences
2014-2017
Three-dimensional range-gated imaging is a new 3D sensing technique with higher resolution than flash LIDAR, and has great potential in realizing high-resolution real-time to satisfy land surface remote applications. In this paper, three existing approaches of LIDAR are introduced including their advantages disadvantages. Among them, the two methods gain modulation range-intensity correlation can reconstruct scene from gate images, which enable imaging. We propose superresolution based on...
In underwater range-gated imaging (URGI), enhancement of low-brightness and low-contrast images is critical for human observation. Traditional histogram equalizations over-enhance images, with the result details being lost. To compress over-enhancement, a lower-upper-threshold correlation method proposed self-adaptive based on double-plateau equalization. The lower threshold determines image compresses over-enhancement. It correlated upper threshold. First, updated by searching local maximum...
An automatic fishing net detection and recognition method for underwater obstacle avoidance is proposed. In the method, optical gated viewing technology utilized to obtain high-resolution images extend distance by suppressing water backscattering background noise. The based on proposed histograms of slope lines (HSLs) descriptors plus a support vector machine classifier. extraction HSL includes five steps contrast-limited adaptive histogram equalization, Gaussian low-pass filtering, Canny...
Light Detection and Ranging (LiDAR) has been widely adopted in modern self-driving vehicles mobile robotics, providing 3D information of the scene surrounding objects. However, LiDAR systems suffer from many kinds noise, its noisy point clouds degrade downstream tasks. Existing cloud de-noising methods are time-consuming or cannot deal with noise caused by occlusions penetrating transparent surfaces. In this paper, we introduce a depth-prior-based method to all types real time. The depth...
3D Range-gated Imaging (3DRGI) has great potential for long-range detection in adverse weather conditions. Recently, vision-guided 3DRGI brought new perspectives to this area as it overcomes hardware limitations and greatly increases flexibility. However, existing methods do not consider the optical properties of range-gated imaging, which results low accuracy. This paper proposes a depth-prior-based method combine advantages optical-based methods. In method, depth-prior is firstly deduced...
For the in situ detection technologies of planktons and fishes, optical cameras traditionally have a small fixed sampling volume with strong target-sized dependent (typically<1 mm), imaging sonar has lower spatial resolution (typically>2 cm) problem species identification. To solve above problems, this paper proposes an method gated for millimeter- to centimeter-scale plankton fish detection. In method, can be flexibly adjusted by matching temporal parameters gate pulses illuminator laser...
Underwater 3D range-gated imaging can extend the detection range over underwater stereo cameras, and also has great potentials in real-time high-resolution than laser scanning. In this paper, a triangular-range-intensity profile spatial correlation method is used for imaging. Different from traditional trapezoidal method, our gate images have triangular range-intensity profiles. Furthermore, inter-frame video-rate addition, multi-pulse time delay integration introduced to shape...
This Letter proposes a high bit-depth coding method to improve depth map resolution and render it suitable human-eye observation in 3D range-intensity correlation laser imaging. In this method, CCD camera with nanosecond-scaled gated intensifier is used as an image sensor; subsequently two gate images specific profiles are obtained establish the gray finally encoded by equidensity pseudocolor. With color generated higher range resolution. our experimental work, of improved factor 1.67.
A control software named as gated imaging lab (GIL) for 2D/3D underwater or atmospheric range-gated has been introduced. First, a detailed analysis of the functional requirements system is made. Based on its operating principle and hardware components, modules GIL are determined. It mainly includes zooming focusing lens, setting intensified charge-coupled device (ICCD), changing laser divergence angle, controlling synchronization timing unit reconstructing three dimensional (3D) scenes based...
Underwater range-gated laser imaging (URGLI) still has some problems like un-uniform light, low brightness and contrast. To solve the problems, a variant of adaptive histogram equalization called contrast limited (CLAHE) is proposed in this paper. In experiment, using CLAHE HE to enhance images, evaluate quality enhanced images by peak signal noise ratio (PSNR) The result shows that gets over-enhanced, while good enhancement with compressing over-enhancement influence light. experimental...