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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 transmissionadjusting its compression ratio during the image compression process, thereby improving the efficiencyThis 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 compressionthe data cache, and thus improve the efficiency of the underwater image communication system.

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

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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: Most of the existing underwater imaging methods focus on relatively clear underwater environment, itIn this paper, we propose a turbidity-adaptive underwater image enhancement method.The 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    

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Detecting large-scale underwater cracks based on remote operated vehicle and graph convolutional neural

Wenxuan CAO; Junjie LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11,   Pages 1378-1396 doi: 10.1007/s11709-022-0855-8

Abstract: of underwater structures.In this paper, a large-scale underwater crack examination method is proposed based on image stitchingThe graph convolutional neural network (GCN) was used to segment the stitched image.higher than Fully convolutional networks (FCN), proving that GCN has great potential of application in imagesegmentation and underwater image processing.

Keywords： underwater cracks     remote operated vehicle     image stitching     image segmentation     graph convolutional    

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Research of Lossless Image Compression Base on Level-scalability

Li Luwei,Zhou Shuoyan,Cai Yiyu

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 33-37

Abstract:

A level-embedded lossless image compression method for continuous-tone still images is presented.Level (bit-plane) scalability is achieved by separating the image into two layers (the base layer andthe residual layer) before compression.A comparison of the proposed scheme with a number of scalable and non-scalable lossless image compressionalgorithms indicates that the level-embedded compression incurs only a small penalty in compression

Keywords： data processing techniques     lossless image compression     context-based model     embedded level    

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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
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A New Algorithm of Fractal Image Coding

Wang Xiuni,Jiang Wei,Wang Licun

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 54-57

Abstract:

Because it takes too much of time in fractal image coding, the paper analyses the factors that affectthe speed of fractal image coding , and proposes a novel idea by using the reformed variance (tentatively) to improve image fractal compression performance .A theorem is proved that the IFS cannot change the image blocks' reformed variance.Moreover , it gives a novel fractal image compression method based on the reformed variance.

Keywords： fractal coding     image compression     variance    

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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 deviationFirst, 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    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: Acoustic emission and digital image correlation were used to study the spatiotemporal evolution characteristicsof soft and hard composite laminated rock masses (SHCLRM) containing double fissures under uniaxial compression

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Influence of steel corrosion on axial and eccentric compression behavior of coral aggregate concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1415-1425 doi: 10.1007/s11709-021-0786-9

Abstract: To study the behavior of coral aggregate concrete (CAC) column under axial and eccentric compression,the compression behavior of CAC column with different types of steel and initial eccentricity (eNu under axial and eccentric compression

Keywords： coral aggregate concrete column     axial compression     eccentric compression     steel corrosion     calculation    

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Behavior of dam concrete under biaxial compression-tension and triaxial compression-compression-tension

WANG Huailiang, SONG Yupu

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 323-328 doi: 10.1007/s11709-008-0043-5

Abstract: Specimens subjected to biaxial compression-tension (C-T) and triaxial compression-compression-tension

Keywords： requirement     wet-screened concrete     compression-tension     maximum aggregate     principal    

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Design and construction technology of underwater tunnel

Wang Mengshu

Strategic Study of CAE 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    

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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    

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Effects of compression ratio on the combustion characteristics of a homogeneous charge compression ignition

SONG Ruizhi, ZHOU Longbao, LIU Shenghua, LI Wei, HU Tiegang

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 463-467 doi: 10.1007/s11708-007-0068-0

Abstract: The effects of homogeneous charge compression ignition (HCCI) engine compression ratio on its combustion

Keywords： homogeneous     cylinder     combustion     compression     dimethyl    

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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    

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Numerical study of ignition mechanism of n-heptane direct injection compression-ignition engine

Xiaoping GUO, Zhanjie WANG,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 432-439 doi: 10.1007/s11708-009-0050-9

Abstract: A detailed chemical dynamical mechanism of oxidation of n-heptane was implemented into kiva-3 code to study the ignition mechanism of a high-temperature, high-pressure, three-dimensional-space, transient turbulent, non-homogeneous, mono-component fuel in the engine. By testing the quantity of the heat released by the chemical reaction within the cylinder cell, the elementary reaction showing an obvious increase in the cell temperature was defined as ignition reaction and the corresponding cell as ignition position. The main pathway of the ignition reaction was studied by using the reverse deducing method. The result shows that the ignition in the engine can be divided into low-temperature ignition and high-temperature ignition, both of which follow the same rule in releasing heat, called the impulse heat releasing feature. Low-temperature ignition reaction, whose ignition reaction is c5h9o1-4=ch3cho+c3h5-a, follows the oxidation mechanism, while high-temperature ignition reaction, whose ignition reaction is c2h3o1-2=ch3co, follows the decomposition mechanism. No matter which ignition it is in, the chemical reaction that restrains the ignition reaction from lasting is the deoxidization reaction of alkylperoxy radicals.

Keywords： compression-ignition engine     ignition mechanism     elementary reaction     n-heptane    

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Title Author Date Type Operation

Adaptive compression method for underwater images based on perceived quality estimation

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

Journal Article

Turbidity-adaptive underwater image enhancement method using image fusion

Journal Article

Detecting large-scale underwater cracks based on remote operated vehicle and graph convolutional neural

Wenxuan CAO; Junjie LI

Journal Article

Research of Lossless Image Compression Base on Level-scalability

Li Luwei,Zhou Shuoyan,Cai Yiyu

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

A New Algorithm of Fractal Image Coding

Wang Xiuni,Jiang Wei,Wang Licun

Journal Article

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

Pan-wang PAN, Fei YUAN, En CHENG

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article

Influence of steel corrosion on axial and eccentric compression behavior of coral aggregate concrete

Journal Article

Behavior of dam concrete under biaxial compression-tension and triaxial compression-compression-tension

WANG Huailiang, SONG Yupu

Journal Article

Design and construction technology of underwater tunnel

Wang Mengshu

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

Effects of compression ratio on the combustion characteristics of a homogeneous charge compression ignition

SONG Ruizhi, ZHOU Longbao, LIU Shenghua, LI Wei, HU Tiegang

Journal Article

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

Hai YANG, Jie MA,

Journal Article

Numerical study of ignition mechanism of n-heptane direct injection compression-ignition engine

Xiaoping GUO, Zhanjie WANG,

Journal Article