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Turbidity-adaptive underwater image enhancement method using image fusion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-021-0669-8

Abstract: In this paper, we propose a turbidity-adaptive underwater image enhancement method.Based on the detection result, different image enhancement strategies are designed to deal with the problemThe proposed method is verified by an underwater image dataset captured in real underwater environmentThe result is evaluated by image metrics including structure similarity index measure, underwater colorimage quality evaluation metric, and speeded-up robust features.

Keywords: turbidity     underwater image enhancement     image fusion     underwater robots     visibility    

De-scattering and edge-enhancement algorithms for underwater image restoration Research Papers

Pan-wang PAN, Fei YUAN, En CHENG

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 6,   Pages 862-871 doi: 10.1631/FITEE.1700744

Abstract:

Image restoration is a critical procedure for underwater images, which suffer from serious color deviationRestoration can be divided into two stages: de-scattering and edge enhancement.First, we introduce a multi-scale iterative framework for underwater image de-scattering, where a convolutionalSince there is no available dataset to train the network, a dataset which includes 2000 underwater imagesSecond, a strategy based on white balance is proposed to remove color casts of underwater images.

Keywords: Image de-scattering     Edge enhancement     Convolutional neural network     Non-subsampled contourlet transform    

Automatic image enhancement by learning adaptive patch selection None

Na LI, Jian ZHAN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 206-221 doi: 10.1631/FITEE.1700125

Abstract: However, some photos lack detail and need enhancement.Many existing image enhancement algorithms are patch based and the patch size is always fixed throughoutthe image.In this study, we propose an automatic image enhancement method based on adaptive patch selection usingenhancement algorithms.

Keywords: Image enhancement     Contrast enhancement     Dark channel     Bright channel     Adaptive patch based processing    

Classical and state-of-the-art approaches for underwater image defogging: a comprehensive survey

Jing-chun Zhou, De-huan Zhang, Wei-shi Zhang,zhoujingchun@dlmu.edu.cn,zhangdehuan@dlmu.edu.cn,teesiv@dlmu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 12,   Pages 1671-1814 doi: 10.1631/FITEE.2000190

Abstract: In underwater scenes, the quality of the video and image acquired by the underwater imaging system suffersFirst we analyze the reasons for degradation of underwater images and the underwater optical imagingThen we classify the technologies into three categories, including image , image , and deep learningFinally, we summarize the shortcomings of the defogging approaches for underwater images and propose

Adaptive compression method for underwater images based on perceived quality estimation Regular Papers

Ya-qiong CAI, Hai-xia ZOU, Fei YUAN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 716-730 doi: 10.1631/FITEE.1700737

Abstract:

Underwater image compression is an important and essential part of an underwater image transmissionof the image transmission system.This study first estimates the perceived quality of underwater image compression based on embedded codingExperimental results show that the model can effectively fit the quality curve of underwater image compressionimage communication system.

Keywords: Underwater image compression     Set partitioning in hierarchical trees     Compressive sensing     Compression quality    

Design and construction technology of underwater tunnel

Wang Mengshu

Strategic Study of Chinese Academy of Engineering 2009, Volume 11, Issue 7,   Pages 4-10

Abstract: text-align: justify;">It is briefly introduced that when passing over or crossing rivers, lakes and seas, underwaterof design and construction, key construction technology and frequently-used construction method of underwater

Keywords: underwater tunnel     design     construction    

Effects of thermocline on performance of underwater glider’s power system propelled by ocean thermal

Hai YANG, Jie MA,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 472-479 doi: 10.1007/s11708-009-0052-7

Abstract: Based on the enthalpy method, a mathematical model of the underwater glider’s power system wasthe time efficiency of operation was introduced, so that the effects of different thermoclines on the underwater

Keywords: mathematical     underwater glider     system working     certain     corresponding threshold    

Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 227-237 doi: 10.1631/FITEE.1400217

Abstract: We present a novel image fusion scheme based on gradient and scrambled block Hadamard ensemble (SBHE)In the fusion phase, the image gradient is calculated to reflect the abundance of its contour informationBy compositing the gradient of each image, gradient-based weights are obtained, with which compressiveFinally, inverse transformation is applied to the coefficients derived from fusion, and the fused imageIn addition, different image fusion application scenarios are applied to explore the scenario adaptability

Keywords: Compressive sensing (CS)     Image fusion     Gradient-based image fusion     CS-based image fusion    

Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1350-1362 doi: 10.1007/s11709-019-0559-x

Abstract: experiments and numerical studies are conducted to investigate the effect of shock loads due to an underwaterNumerical simulations with three different models of pressure time history generated by underwater explosionThe second model to predict the time history of shock wave pressure from an underwater explosion was

Keywords: underwater explosion     centrifuge experiment     shock load     dynamic response     accumulated shock impulse    

Edge detection of steel plates at high temperature using image measurement

Qiong Zhou, Qi An

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 77-82 doi: 10.1007/s11465-009-0013-1

Abstract: An edge detection method for the measurement of steel plate’s thermal expansion is proposed in this paper, where the shrinkage of a steel plate is measured when temperature drops. First, images are picked up by an imaging system; a method of regional edge detection based on grayscales’ sudden change is then applied to detect the edges of the steel plate; finally, pixel coordinates of the edge position are transformed to physical coordinates through calibration parameters. The experiment shows that the real-time, high precision, and non-contact measurement of the steel plate’s edge position under high temperature can be realized using the imaging measurement method established in this paper.

Keywords: thermal expansion     image measurement     edge detection     image calibration    

Aslotted floor acquisitionmultiple access based MACprotocol for underwater acoustic networks withRTS

Liang-fang QIAN,Sen-lin ZHANG,Mei-qin LIU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 217-226 doi: 10.1631/FITEE.1400187

Abstract: bandwidth, and high bit error rate pose great challenges in media access control (MAC) protocol design for underwaterA MAC protocol called slotted floor acquisition multiple access (slotted-FAMA) suitable for underwaterTo overcome this drawback, this paper proposes a slotted-FAMA based MAC protocol for underwater acoustic

Keywords: Underwater acoustic networks     Medium access control (MAC)     Request-to-send (RTS) competition     Throughput    

Development of Marine Equipment for Underwater Stereoscopic Observation

Ma Rui, Zhao Xiutao, Liu Cungen

Strategic Study of Chinese Academy of Engineering 2020, Volume 22, Issue 6,   Pages 19-25 doi: 10.15302/J-SSCAE-2020.06.003

Abstract:

Establishing an underwater stereoscopic observation network to obtainThis study first analyzes the need and necessity of developing the underwater stereoscopic observationdevelopment, and presents the key breakthrough points of marine sensors which serve as the key link for underwatertransformation of research results of key marine sensors, coordinate the management of the marine equipment for underwater

Keywords: ocean observation     sea floor observatory network     underwater vehicle     underwater sensor    

Fabrication of a superhydrophilic/underwater superoleophobic stainless steel mesh for oil/water separation

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-022-2170-2

Abstract: increasing amount of oily wastewater produced each day, it is important to develop superhydrophilic/underwaterIn this paper, a superhydrophilic/underwater superoleophobic N-isopropylacrylamide-coated stainless

Keywords: oil/water separation     N-isopropylacrylamide     stainless steel mesh     ultrahigh flux    

Performance enhancement of partially shaded solar PV array using novel shade dispersion technique

Namani RAKESH,T. Venkata MADHAVARAM

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 227-239 doi: 10.1007/s11708-016-0405-y

Abstract: Solar photo voltaic array (SPVA) generates a smaller amount of power than the standard rating of the panel due to the partial shading effect. Since the modules of the arrays receive different solar irradiations, the P-V characteristics of photovoltaic (PV) arrays contain multiple peaks or local peaks. This paper presents an innovative method (magic square) in order to increase the generated power by configuring the modules of a shaded photovoltaic array. In this approach, the physical location of the modules in the total cross tied (TCT) connected in the solar PV array is rearranged based on the magic square arrangement pattern. This connection is done without altering any electrical configurations of the modules in the PV array. This method can distribute the shading effect over the entire PV array, without concentrating on any row of modules and can achieve global peaks. For different types of shading patterns, the output power of the solar PV array with the proposed magic square configuration is compared with the traditional configurations and the performance is calculated. This paper presents a new reconfiguration technique for solar PV arrays, which increases the PV power under different shading conditions. The proposed technique facilitates the distribution of the effect of shading over the entire array, thereby, reducing the mismatch losses caused by partial shading. The theoretical calculations are tested through simulations in Matlab/Simulink to validate the results. A comparison of power loss for different types of topologies under different types of shading patterns for a 4 × 4 array is also explained.

Keywords: photovoltaic cells     mismatch loss     shading patterns     partial shading     magic square     power enhancement     global    

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free

Haiyan LI, Jing LIU

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 20-42 doi: 10.1007/s11708-011-0139-9

Abstract: Water is perhaps the most widely adopted working fluid in conventional industrial heat transport engineering. However, it may no longer be the best option today due to the increasing scarcity of water resources. Furthermore, the wide variations in water supply throughout the year and across different geographic regions also makes it harder to easily access. To address this issue, finding new alternatives to replace water-based technologies is imperative. In this paper, the concept of a water-free heat exchanger is proposed and comprehensively analyzed for the first time. The liquid metal with a low melting point is identified as an ideal fluid that can flexibly be used within a wide range of working temperatures. Some liquid metals and their alloys, which have previously received little attention in thermal management areas, are evaluated. With superior thermal conductivity, electromagnetic field drivability, and extremely low power consumption, liquid metal coolants promise many opportunities for revolutionizing modern heat transport processes: serving as heat transport fluid in industries, administrating thermal management in power and energy systems, and innovating enhanced cooling in electronic or optical devices. Furthermore, comparative analyses are conducted to understand the technical barriers encountered by advanced water-based heat transfer strategies and clarify this new frontier in heat-transport study. In addition, the unique merits of liquid metals that could lead to innovative heat exchanger technologies are evaluated comprehensively. A few promising industrial situations, such as heat recovery, chip cooling, thermoelectricity generation, and military applications, where liquid metals could play irreplaceable roles, were outlined. The technical challenges and scientific issues thus raised are summarized. With their evident ability to meet various critical requirements in modern advanced energy and power industries, liquid metal-enabled technologies are expected to usher a new and global era of water-free heat exchangers.

Keywords: heat exchanger     liquid metal     water resource     heat transport enhancement     coolant     thermal management     process    

Title Author Date Type Operation

Turbidity-adaptive underwater image enhancement method using image fusion

Journal Article

De-scattering and edge-enhancement algorithms for underwater image restoration

Pan-wang PAN, Fei YUAN, En CHENG

Journal Article

Automatic image enhancement by learning adaptive patch selection

Na LI, Jian ZHAN

Journal Article

Classical and state-of-the-art approaches for underwater image defogging: a comprehensive survey

Jing-chun Zhou, De-huan Zhang, Wei-shi Zhang,zhoujingchun@dlmu.edu.cn,zhangdehuan@dlmu.edu.cn,teesiv@dlmu.edu.cn

Journal Article

Adaptive compression method for underwater images based on perceived quality estimation

Ya-qiong CAI, Hai-xia ZOU, Fei YUAN

Journal Article

Design and construction technology of underwater tunnel

Wang Mengshu

Journal Article

Effects of thermocline on performance of underwater glider’s power system propelled by ocean thermal

Hai YANG, Jie MA,

Journal Article

Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

Journal Article

Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Journal Article

Edge detection of steel plates at high temperature using image measurement

Qiong Zhou, Qi An

Journal Article

Aslotted floor acquisitionmultiple access based MACprotocol for underwater acoustic networks withRTS

Liang-fang QIAN,Sen-lin ZHANG,Mei-qin LIU

Journal Article

Development of Marine Equipment for Underwater Stereoscopic Observation

Ma Rui, Zhao Xiutao, Liu Cungen

Journal Article

Fabrication of a superhydrophilic/underwater superoleophobic stainless steel mesh for oil/water separation

Journal Article

Performance enhancement of partially shaded solar PV array using novel shade dispersion technique

Namani RAKESH,T. Venkata MADHAVARAM

Journal Article

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free

Haiyan LI, Jing LIU

Journal Article