# Application of Three-Dimensional Vision Technology in Dance
## 3 Application of 3D Vision Technology in the Dance Field
### Dance Teaching
At the end of the dance, the system provides a comprehensive score report and a slow-motion replay video so that students can quickly and accurately identify mistakes and make improvements promptly. Similarly, [PERSON] et al. developed a system for visualizing ballet dance training to capture and evaluate ballet movements performed by students in a VR environment in real time [69]. The framework is based on the Spherical Self-Organizing Map (SSOM), which unsupervisedly parses ballet movements into structured poses and proposes a unique feature descriptor to more appropriately reflect the subtleties of ballet movements. These movements are represented as gesture trajectories on SSOM through the posture space. The system acquires human movement data by tracking captured skeletal joints through the Kinect camera system and compares it with the instructor's movement database. Meanwhile, the CAVE virtual environment provides instruction with 3D visualization and feedback in scores to quantify the students' performance so that the students can learn and train to dance in an immersive environment. [PERSON] et al. proposed a conceptual tool for simulating dance, DisDans, which allows for multiple dancers not in the same space to dance together and immersively interact with each other through tactile, visual, and auditory means [70]. In DisDans, real-time motion capture technology with Kinect sensors and 3D holographic projection vision technology is mainly utilized. Each dancer's body movements is recorded and converted into a projection, which other dancers can synchronously see through the AR glasses. DisDans is a tool with a diversity of uses. When utilized by a single user, it can download pre-choreographed dance animation content to dance with the projections, which provides a new way to learn high-quality private dance lessons. When utilized by multiple users simultaneously, it can be applied for entertainment interactions, allowing for dancers and choreographers to collaborate over long distances and as a tool for recording choreography. During dance teaching, a teacher can teach multiple students simultaneously, who may be located in different places. In addition, the dance teacher can easily switch the display system from a single monitor to numerous monitors (virtual classroom) to see all the students and provide them with the necessary instructions. [PERSON] et al. proposed an innovative real-time dance training application for close contact between a person and a 3D character. This application is applicable in both VR and AR to satisfy different people's usage preferences [71]. In use, a 3D-scanned char-acter of the famous Latin dancer [PERSON] follows the user's movements and responds to the user's improvised dance in real-time. He will also perform real-time dances based on the direction guided by the user, which is achieved through Unity's inverse kinematics. Three-dimensional vision technology presents images and videos in a 3D way through special equipment, which can help each student independently have a clearer and more intuitive understanding of the trajectory and spatial relationship of dance movements. This significantly enhances the efficiency in dance teaching and learning. In addition, combined with motion capture technology, students can visualize their learning situation to improve their dance skills quickly. In summary, 3D vision techniques are an important way to perceive the world and an indispensable visual foundation for understanding dance movements. They help us construct spatial and dynamic images of dance movements, thus better im-proving the efficiency of dance teaching. However, most of the current dance teaching platforms based on 3D vision technology require the wearing of corresponding equip-ment, which leads to load-bearing and easy fatigue for users. Moreover, the 3D virtual database is not comprehensive. According to some existing reports, there are currently few 3D visual databases available for dance teaching.