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- 저자 : ( Kaiping Xu ) (검색결과 2 건)
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Multi-focus Image Fusion using Fully Convolutional Two-stream Network for Visual Sensors
( Kaiping Xu ),( Zheng Qin ),( Guolong Wang ),( Huidi Zhang ),( Kai Huang ),( Shuxiong Ye ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.5
We propose a deep learning method for multi-focus image fusion. Unlike most existing pixel-level fusion methods, either in spatial domain or in transform domain, our method directly learns an end-to-end fully convolutional two-stream network. The framework maps a pair of different focus images to a clean version, with a chain of convolutional layers, fusion layer and deconvolutional layers. Our deep fusion model has advantages of efficiency and robustness, yet demonstrates state-of-art fusion quality. We explore different parameter settings to achieve trade-offs between performance and speed. Moreover, the experiment results on our training dataset show that our network can achieve good performance with subjective visual perception and objective assessment metrics.
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Study on the Fabrication and Grinding Performance of the Self-sharpening Cr2O3 Gel Abrasive Tool
Kaiping Feng,Liang Zhao,Binghai Lyu,Lanxing Xu,Yanzhang Gu 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.25 No.4
This paper proposes a chromium oxide (Cr2O3) gel abrasive tool with the coated aluminum nitride (AlN) powder to give the tool with self-sharpening ability. The SiO2/AlN powder (S/A powder) is prepared through the sol–gel method. Effect of acetic acid solution content on the Tetraethyl orthosilicate (TEOS) hydrolysis reaction is explored. Effect of sintering temperature on the moisture resistance of the S/A powder are studied. The viscosity experiments, porosity tests, pre-grinding experiments and hardness tests are conducted to test the properties of the abrasive tool. The force–displacement curves are tested to evaluate the uniformity of the tool. The grinding effect on the sapphire substrate of tool with S/A powder, normal abrasive tool and tool with pore forming agent are compared. Results show that the SiO2 gel has great stability when the acetic acid solution content reached 0.6 g, and the gel does not crack after a week’s rest, which is suitable for the coating of the AlN powder. In the powder sintering experiment, 700 °C is found to be the optimal sintering temperature for the S/A powder preparation. The viscosity experiments show that the viscosity of the slurry will surge when the content of S/A powder reached 12 wt%, which impairs the uniformity of the gel abrasive tool. In the pre-grinding test, the abrasive tool with the S/A powder of 9 wt% shows great grinding stability, material removal rate (MRR) and wear resistance. The grinding experiments show that tool with S/A powder can achieve better surface quality and have a stable grinding process, and the glazing phenomena is ameliorated. After grinding, the average roughness Ra of the sapphire substrate reaches 1.57 nm and its flatness reached 0.725 μm. After chemical mechanical polishing (CMP), the average Ra of sapphire substrate reaches 0.64 nm and the scratch-free surface can be obtained.
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