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A System for Practicing Formations in Dance Performance Supported by Self-Propelled Screen (20130308 AH2013 shuhei tsuchida)

Collapsed formation in a group dance will greatly reduce the quality of the performance even if the dance in the group is synchronized with music. Therefore, learning the formation of a dance in a group is as important as learning its choreography. However, if someone cannot participate in practice, it is difficult for the rest of the members to gain a sense of the proper formation in practice. We propose a practice-support system for performing the formation smoothly using a self-propelled screen even if there is no dance partner. We developed a prototype of the system and investigated whether a sense of presence provided by both methods of practicing formations was close to the sense we really obtain when we dance with humans. The result verified that the sense of dancing with a projected video was closest to the sense of dancing with a dancer, and the trajectory information from dancing with a self-propelled robot was close to the trajectory information from dancing with a dancer. Practicing in situations similar to real ones is able to be done by combining these two methods. Furthermore, we investigated whether the self-propelled screen obtained the advantages of dancing with both methods and found that it only obtained advantages of dancing with projected video.

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A System for Practicing Formations in Dance Performance Supported by Self-Propelled Screen (20130308 AH2013 shuhei tsuchida)

  1. 1. A System for Practicing Formations in Dance Performance Supported by Self-Propelled Screen Shuhei Tsuchida Tsutomu Terada Masahiko Tsukamoto Kobe University, Japan 1
  2. 2. Background A Formation in a group dance is important. 2
  3. 3. 3
  4. 4. Background To perform well ・Keep an appropriate distance ・Move at the same time 4
  5. 5. 5 Related Works • Support the learning of choreography Real-time mocap dance recognition for an interactive dancing game (L.Deng, 2011) • Support the training using a robot Partner Ball-room Dance Robot-PBDR- (K. Kosuge, 2008) We can not confirm the location of the formation
  6. 6. 6 Research Purpose C C C Dancers usually practice using a mirror. Reason“check the formation and choreography” This is fine when there are more than one person. if someone cannot participate in the practice, it is difficult for the rest of the members to gain a sense of the proper formation. We propose a practice support system for performing the formation smoothly even if there is no dance partner. But... Therefore...
  7. 7. 7 Methods of Practicing Formations Normal Dancers look at a mirror while practicing. Three possible approaches u Dancing by watching reference videos that was previously created u Learning the distance and the absence of dancers by projecting them onto a wall u Feeling as if dancers are present using a self-propelled robot that can move quickly like a person
  8. 8. u Dancing by watching reference videos that was previously created u Learning the distance and the absence of dancers by projecting them onto a wall u Feeling as if dancers are present using a self-propelled robot that can move quickly like a person 8 Methods of Practicing Formations Normal Dancers look at a mirror while practicing. Three possible approaches
  9. 9. 9 Methods of Practicing Formations Normal Dancers look at a mirror while practicing. u Dancing by watching reference videos that was previously created This can reduce the gap of the moving distance of a dancer u Learning the distance and the absence of dancers by projecting them onto a wall A dancer will have an illusion that the other dancer is actually there u Feeling as if dancers are present using a self-propelled robot that can move quickly like a person By moving the robot just like the absent dancer, it can provide a presence of him or her. Three possible approaches
  10. 10. Hypothesis u When using a self-propelled robot The dancer will feel difficult to dance because he or she will be worried about bumping into the robot. But, the dancer’s path will be closed to the path when dancing in a group, because the dancer will think of the robot as a marker. u When using a projected video The dancer will be easy to dance because there is no risk of collision between the robot and the dancer. But, the path that the dancers moves will be different from when dancing in a group because there is a gap between the video and reality.
  11. 11. Evaluate questionnaire Evaluate trajectories of movements Hypothesis u When using a self-propelled robot The dancer will feel difficult to dance because he or she will be worried about bumping into the robot. But, the dancer’s path will be closed to the path when dancing in a group, because the dancer will think of the robot as a marker. u When using a projected video The dancer will be easy to dance because there is no risk of collision between the robot and the dancer. But, the path that the dancers moves will be different from when dancing in a group because there is a gap between the video and reality.
  12. 12. 12 Preliminary Experiment for practicing formation(1/5) u Subjects dance with a dancer u We investigate the following three methods for practicing formations and compare them to find out which method felt the closet to dancing with an actual dancer. Dancing with an actual dancer
  13. 13. 13 Experiment1: Dancing alone Experiment2: Dancing with a self-propelled robot Experiment3: Dancing with a projected video Preliminary Experiment for practicing formation(2/5)
  14. 14. 14 Experiment1: Dancing alone Experiment2: Dancing with a self-propelled robot Experiment3: Dancing with a projected video Preliminary Experiment for practicing formation(2/5)
  15. 15. Preliminary Experiment for practicing formation(2/5) 15 Experiment1: Dancing alone Experiment2: Dancing with a self-propelled robot Experiment3: Dancing with a projected video
  16. 16. 16 Experiment1: Dancing alone Experiment2: Dancing with a self-propelled robot Experiment3: Dancing with a projected video Preliminary Experiment for practicing formation(2/5)
  17. 17. 17 Experiment1: Dancing alone Experiment2: Dancing with a self-propelled robot Experiment3: Dancing with a projected video Preliminary Experiment for practicing formation(2/5)
  18. 18. 18 Dancing alone a self-propelled robot a projected video Preliminary Experiment for practicing formation(3/5) Dancing with an actual dancer
  19. 19. 19 u The subjects were nine dancers who had experience in dancing for more than three years. The subjects learned the choreography for approximately 12 seconds that consisted of three times eight beats. u This choreography contained three elements that were considered to be greatly influenced by the presence of the others. 1.Intersection 2.Approaching 3.Parallel translation Preliminary Experiment for practicing formation(4/5)
  20. 20. 20 u We saved the location information obtained from a depth camera. u All subjects danced the choreography three times each for experiment 1,2,3 and dancing with a dancer. u All subjects evaluated five question items in five stages. Preliminary Experiment for practicing formation(4/5)
  21. 21. 21 Results and Consideration(1/5) uResults from a questionnaire Question 1 Question 2 Question 3 Question 4 Question 5 Ave. Var. Ave. Var. Ave. Var. Ave. Var. Ave. Var. Alone 2.0 1.6 1.7 0.44 2.1 1.2 3.8 1.7 1.4 0.25 self-propelled robot 3.0 1.1 2.7 2.2 2.6 1.8 2.0 1.6 2.6 1.1 Projected video 2.0 0.67 3.2 0.84 3.4 1.1 4.1 0.77 2.9 0.32 Low evaluation High evaluation There was a significant difference
  22. 22. 22 Results and Consideration(1/5) uResults from a questionnaire Question 1 Question 2 Question 3 Question 4 Question 5 Ave. Var. Ave. Var. Ave. Var. Ave. Var. Ave. Var. Alone 2.0 1.6 1.7 0.44 2.1 1.2 3.8 1.7 1.4 0.25 self-propelled robot 3.0 1.1 2.7 2.2 2.6 1.8 2.0 1.6 2.6 1.1 Projected video 2.0 0.67 3.2 0.84 3.4 1.1 4.1 0.77 2.9 0.32 Low evaluation High evaluation Dancing with the projected video was the closet to dancing with a dancer.
  23. 23. 23 uThe average of the distance between method of dancing with a dancer in each method Dancing with a self-propelled robot was the closet to the trajectory information of dancing with a dancer. The distance is long The distance is short The subjects number 1 2 3 4 5 6 7 8 9 Alone 207 185 353 415 363 320 570 337 281 A self-propelled robot 202 203 469 360 278 196 481 257 317 A projected video 254 218 532 552 306 256 280 237 469 Results and Consideration(2/5)
  24. 24. 24 Dancing with a projected video ・The sense is close to the sense dancing with an actual dancer ・The movement is not close to the movement in a group Dancing with a self-propelled robot ・The sense is not close to the sense dancing with an actual dancer ・The movement is close to the movement in a group ・A dancer is easy to dance ・The movement is not close to the movement in a group Hypothesis Hypothesis ・A dancer is difficult to dance ・The movement is close to the movement in a group Results Results Results and Consideration(3/5)
  25. 25. 25 Dancing with a projected video ・The sense is close to the sense dancing with an actual dancer ・The movement is not close to the movement in a group Dancing with a self-propelled robot ・The sense is not close to the sense dancing with an actual dancer ・The movement is close to the movement in a group ・A dancer is easy to dance ・The movement is not close to the movement in a group Hypothesis Hypothesis ・A dancer is difficult to nce ・The movement is close to the movement in a group Results Results Results and Consideration(3/5)
  26. 26. 26 Dancing with a projected video ・The sense is close to the sense dancing with an actual dancer ・The movement is not close to the movement in a group Dancing with a self-propelled robot ・The sense is not close to the sense dancing with an actual dancer ・The movement is close to the movement in a group ・A dancer is easy to dance ・The movement is not close to the movement in a group Hypothesis Hypothesis ・A dancer is difficult to nce ・The movement is close to the movement in a group Results Results Results and Consideration(3/5)
  27. 27. 27 Demerit: The trajectory information was not close to the trajectory information dancing with an actual dancer We combine a self-propelled robot which trajectory information is right and a projected video which the sense is right Dancing with a projected video Merit: The sense was close to the sense dancing with an actual dancer Dancing with a self-propelled robot Merit: The trajectory information was close to the trajectory information dancing with an actual dancer Demerit: The sense was not close to the sense dancing with an actual dancer Results and Consideration(3/5)
  28. 28. Dancing with A projected video+a self-propelled robot fixed a screen 28 Methods combined a self-propelled robot which trajectory information is right and a projected video which the sense is right The proposed method Results and Consideration(5/5)
  29. 29. Automation of a self-propelled screen We controlled OMNIKIT2010 by hand with a wireless-controller.…
  30. 30. Automation of a self-propelled screen We controlled OMNIKIT2010 by hand with a wireless-controller.… I aim to make the robot moves automatically and more like an actual dancer.
  31. 31. 31 System Configuration Screen Main PC Projector Self-propelled Robot Small PC Socket Transmission Speaker Depth Data Image Signal, Signal Depth Camera Sixaxis motion sensor Bluetooth Transmission
  32. 32. 32 System Appearance
  33. 33. 33 System Appearance
  34. 34. Experiment(1/5) u Dancing with a self-propelled robot u Dancing with a projected video Dancing with A projected video+a self-propelled robot fixed a screen Proposed methods is obtained the preliminary experiment Compare 35 Can we use the merit of both dancing with a robot and with a video?
  35. 35. 36 1.Intersection 2.Approaching 3.Parallel translation u In this Experiment… The complex and long choreography Experiment(2/5)
  36. 36. Simple choreography Simple choreography 37 Intersection Approaching Parallel translation Simple choreography Experiment(3/5)
  37. 37. Simple choreography Simple choreography 38 Intersection Approaching Parallel translation Simple choreography Factors to perform well u Keep an appropriate distance (Front, Back) u Move at same time u Keep an appropriate distance (Side) Experiment(4/5)
  38. 38. 39 u Subjects are nine dancers have danced for more than three years. u All subjects danced the choreography three times each methods. u We saved the location information obtained from a depth camera. u All subjects evaluated the following two question items in five stages. Experiment(5/5)
  39. 39. Results and Consideration(1/6) Dancing with an actual dancer Dancing with a self-propelled robot Dancing with an projected video Dancing with a self-propelled robot fixed a screen + a projected video Approaching 40 -800 -700 -600 -500 -400 -300 -200 -100 0 1 2 3 4
  40. 40. Results and Consideration(1/6) Dancing with an actual dancer Dancing with a self-propelled robot Dancing with an projected video Dancing with a self-propelled robot fixed a screen + a projected video Approaching 41 -800 -700 -600 -500 -400 -300 -200 -100 0 1 2 3 4
  41. 41. Results and Consideration(1/6) Dancing with an actual dancer Dancing with a self-propelled robot Dancing with an projected video Dancing with a self-propelled robot fixed a screen + a projected video Approaching 42 -800 -700 -600 -500 -400 -300 -200 -100 0 1 2 3 4 It can not be said that we obtained the merit of robot
  42. 42. uResults of the questionnaire of approaching *Question 1: Was it close to the sense of dancing with a dancer? *Question 2:Was it easy to learn the sense of distance? 43 Robot Video Robot +Video +Screen Average Question 1 2.0 2.9 2.9 Question 2 2.2 2.8 2.7 Variance Question 1 1.0 1.5 2.5 Question 2 1.8 1.4 1.8 Results and Consideration(2/6)
  43. 43. uResults of the questionnaire of approaching *Question 1: Was it close to the sense of dancing with a dancer? *Question 2:Was it easy to learn the sense of distance? 44 Robot Video Robot +Video +Screen Average Question 1 2.0 2.9 2.9 Question 2 2.2 2.8 2.7 Variance Question 1 1.0 1.5 2.5 Question 2 1.8 1.4 1.8 Results and Consideration(2/6)
  44. 44. uResults of the questionnaire of approaching *Question 1: Was it close to the sense of dancing with a dancer? *Question 2:Was it easy to learn the sense of distance? 45 Robot Video Robot +Video +Screen Average Question 1 2.0 2.9 2.9 Question 2 2.2 2.8 2.7 Variance Question 1 1.0 1.5 2.5 Question 2 1.8 1.4 1.8 Results and Consideration(2/6) It can be said that we obtained the merit of a video.
  45. 45. 46 Results and Consideration(3/6) The self-propelled screen was able to obtain the advantages of the projected video. However, it was not able to obtain the advantages of the self-propelled robot. Conclusion
  46. 46. Possible causes uThe self-propelled screen gave subjects a greater sense of presence than necessary. The self-propelled screen made it easier to do irregular motions by shaking the screen. uTheir fear of collisions was stronger than that with the other methods. There was a possibility of injury because the outer frame of the screen was made of aluminum. uReliability with the self-propelled screen was low. Because subjects did not practice with it repeatedly. 47 Results and Consideration(4/6)
  47. 47. Possible improvement methods uThe self-propelled screen should move more accurately. uWe need to reduce the risk of the collision by attaching a buffer material to the screen to prevent injuries. uPracticing with the self-propelled screen repeatedly 48 Results and Consideration(5/6)
  48. 48. We have not achieved the purpose uIt is difficult for both a dancer which can not move at the same time and a dancer which can not keep appropriate distance to improve their sense by this system . 49 Results and Consideration(6/6)
  49. 49. 50 uThe self–propelled screen should move more accurately uWe investigate the effectiveness of the self-propelled screen uWe develop a system for practicing more complex formations using more than two self-propelled screen uWe evaluated which method was close to dancing with an actual dancer for each method of practicing formations uWe developed the self-propelled screen based on the results of the experiment Conclusion Future Work uWe investigated whether or not the self-propelled screen obtained the advantages of two methods.

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