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Performance analysis of a dual stage deep rain streak removal convolution neural network module with a modified deep residual dense network

Jayaraman Thiyagarajan, Chinnusamy Shankar

International Journal of Applied Mathematics and Computer Science

2022

Vol. 32, no. 1

111--123

The visual appearance of outdoor captured images is affected by various weather conditions, such as rain patterns, haze, fog and snow. The rain pattern creates more degradation in the visual quality of the image due to its physical structure compared with other weather conditions. Also, the rain pattern affects both foreground and background image information. The removal of rain patterns from a single image is a critical process, and more attention is given to remove the structural rain pattern from real-time rain images. In this paper, we analyze the single image deraining problem and present a solution using the dual stage deep rain streak removal convolutional neural network. The proposed single image deraining framework primarily consists of three main blocks: a derain streaks removal CNN (derain SRCNN), a modified residual dense block (MRDB), and a six-stage scale feature aggregation module (3SFAM). The ablation study is conducted to evaluate the performance of various modules available in the proposed deraining network. The robustness of the proposed deraining network is evaluated over the popular synthetic and real-time data sets using four performance metrics such as the peak signal-to-noise ratio (PSNR), the feature similarity index (FSIM), the structural similarity index measure (SSIM), and the universal image quality index (UIQI). The experimental results show that the proposed framework outperforms both synthetic and real-time images compared with other state-of-the-art single image deraining approaches. In addition, the proposed network takes less running and training time.

Zwiększenie rozdzielczości obrazów termowizyjnych metodą sieci neuronowych głębokiego uczenia

Więcek Piotr, Sankowski Dominik

Pomiary Automatyka Robotyka

2021

R. 25, nr 3

31--35

W pracy przedstawiono nowy algorytm zwiększenia rozdzielczości obrazów termowizyjnych. W tym celu zintegrowano sieć resztkową z modułem współdzielonego filtru z podpróbkowaniem obrazu KSAC (ang. Kernel-Sharing Atrous Convolution). Uzyskano znaczne skrócenie czasu działania algorytmu przy zachowaniu dużej dokładności. Sieć neuronową zrealizowano w środowisku PyTorch. Przedstawiono wyniki działania proponowanej nowej metody zwiększenia rozdzielczości obrazów termowizyjnych o wymiarach 32×24, 160×120 i 640×480 dla skali 2-6.

The article presents a new algorithm for increasing the resolution of thermal images. For this purpose, the residual network was integrated with the Kernel-Sharing Atrous Convolution (KSAC) image sub-sampling module. A significant reduction in the algorithm’s complexity and shortening the execution time while maintaining high accuracy were achieved. The neural network has been implemented in the PyTorch environment. The results of the proposed new method of increasing the resolution of thermal images with sizes 32x24, 160×120 and 640×480 for scales up to 6 are presented.