||As one of purpose of study on image segmentation, we are able to consider whether between object and background region can be judged or not. Thus far, we studied on multi-view 3D CG image quality assessment in the case of occurring the coded degradation for object or background region with 8 viewpoints parallax barrier method. As a result, it is enough to obtain knowledge for subjective quality assessment. However, for objective quality assessment, this is estimation by using data mining. On the other hand, by spreading of deep learning theory, we are able to use deep convolutional neural network easier comparatively. In this paper, we produced, proposed, evaluated, and discussed for data set and platform appropriately in order to carry out semantic segmentation with high efficiency of 3D CG images encoded and decoded by H.265/HEVC.