In this paper, we proposed the atrous CNN method with the shorter computation time while maintaining a high quality of image compatible to the VDSR method. We found that the computation was faster than VDSR through making experiments 30 times. To verify whether image quality for the proposed method is significant statistically or not, we evaluated the quality of the reconstruction image for 100 images. Through the ANOVA analysis, we found that there was no significant difference between methods

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... in the view of the PSNR value and was a significant difference between methods in the view of the SSIM value. As the result of post-hoc analysis, there were two groups; one was the proposed method and the VDSR method. The other was the SRCNN method. In conclusion, the proposed method met our goal of maintaining compatible image quality and reducing computation time compared to VDSR method.