Vision Transformers (ViTs) have emerged as versatile and high-performance models for various tasks such as image classification, object detection, and semantic segmentation. However, the ViT-L model, which demonstrates high accuracy, has a large number of parameters (307M), leading to increased computational requirements. To deploy ViTs on embedded devices and similar platforms, it is crucial to compress the model size and accelerate the inference process. In this paper, we propose the Binary-decomposed Vision Transformer (BdViT), a method for model compression and accelerated inference for ViTs models. BdViT consists of weight binarization based on vector decomposition and quantization of multiplication and addition operations, which does not require retraining model parameters. Through evaluation experiments using image recognition datasets, we demonstrated that BdViT can significantly reduce the number of parameters while mitigating performance degradation.

Humans can feel as if a fake body is their own body in the illusory body ownership. The illusion can be induced to a full body by a visual-tactile synchronicity or visual-motor synchronicity. In our previous study, illusory full body ownership of invisible body was elicited by synchronous movements of virtual gloves and socks. In this study, we aimed to investigate whether the spatial relationship is necessary for the full body illusion using a stimulus of scrambled body. In the scrambled body, positions of gloves and socks were scrambled. The results suggest that spatial relationship of body parts is necessary for the full body illusion.

Illusory body ownership can be induced by visual-tactile stimulation or visual-motor synchronicity. We aimed to test whether a right thumb could be remapped to a virtual right arm and illusory body ownership of the virtual arm induced through synchronous movements of the right thumb and the virtual right arm. We presented the virtual right arm in synchronization with movements of a participant's right thumb on a head-mounted display (HMD). We found that the participants felt as though their right thumb became the right arm, and that the right arm belonged to their own body.