Based on the continuous development of motion capture technology for ordinary video images, unmarked optical motion capture has become the fastest human posture recognition technology. Compared with other technical pr...Based on the continuous development of motion capture technology for ordinary video images, unmarked optical motion capture has become the fastest human posture recognition technology. Compared with other technical products, Google’s 3D human body recognition framework—Mediapipe is the most mature representative in this field. However, Mediapipe also has many defects in the detection of 3D human posture. In this paper, firstly, to solve the problem of inaccurate detection of human posture by Mediapipe, the accuracy of 2D human posture detection is improved through the speed threshold correction method for each joint;According to the problem that the monocular camera can not detect the depth Z value in the human posture data accurately, the Z value of the joint point is corrected for the human tilt angle through statistics;Then, according to the inaccurate recognition of Z value caused by large body posture, the accurate correction of Z value of human posture under different body posture is realized by normalizing the simulation proportion of each body limb;Finally, in order to solve the problem of jitter, lag problem and periodic noise in multiple frames caused by the speed change of human joints, one euro filtering and mean filtering of joint data are carried out. This paper verifies that the accuracy of 3D human posture detection based on the improved Mediapipe is more than 90% through the multi-pose recognition test for people of different heights, weights, ages and gender.展开更多
Since the financial crisis hit in 2007, the US dollar privilege has not only become ＂exorbitant＂ but ＂extortianate. ＂ Countries such as China are no longer willing to allow the USA to exercise this extortionate be...Since the financial crisis hit in 2007, the US dollar privilege has not only become ＂exorbitant＂ but ＂extortianate. ＂ Countries such as China are no longer willing to allow the USA to exercise this extortionate behavior. The potential geopolitical implications of a US dollar decline are immense. The USA would lose its privileged seigniorage position and with that the ability to achieve permanently higher returns on foreign assets than the returns paid to foreigners who invest in the USA. The global economy is already close to operating with three regional exchange rate anchors： the US dollar; the euro; and, increasingly, the renminbi. Hence, the transition to a tripolar system could occur sooner than many assert. Nevertheless, given the importance of financial deepening and integration in the internationalization of currencies, any shift will still be gradual.展开更多
文摘Based on the continuous development of motion capture technology for ordinary video images, unmarked optical motion capture has become the fastest human posture recognition technology. Compared with other technical products, Google’s 3D human body recognition framework—Mediapipe is the most mature representative in this field. However, Mediapipe also has many defects in the detection of 3D human posture. In this paper, firstly, to solve the problem of inaccurate detection of human posture by Mediapipe, the accuracy of 2D human posture detection is improved through the speed threshold correction method for each joint;According to the problem that the monocular camera can not detect the depth Z value in the human posture data accurately, the Z value of the joint point is corrected for the human tilt angle through statistics;Then, according to the inaccurate recognition of Z value caused by large body posture, the accurate correction of Z value of human posture under different body posture is realized by normalizing the simulation proportion of each body limb;Finally, in order to solve the problem of jitter, lag problem and periodic noise in multiple frames caused by the speed change of human joints, one euro filtering and mean filtering of joint data are carried out. This paper verifies that the accuracy of 3D human posture detection based on the improved Mediapipe is more than 90% through the multi-pose recognition test for people of different heights, weights, ages and gender.
文摘Since the financial crisis hit in 2007, the US dollar privilege has not only become ＂exorbitant＂ but ＂extortianate. ＂ Countries such as China are no longer willing to allow the USA to exercise this extortionate behavior. The potential geopolitical implications of a US dollar decline are immense. The USA would lose its privileged seigniorage position and with that the ability to achieve permanently higher returns on foreign assets than the returns paid to foreigners who invest in the USA. The global economy is already close to operating with three regional exchange rate anchors： the US dollar; the euro; and, increasingly, the renminbi. Hence, the transition to a tripolar system could occur sooner than many assert. Nevertheless, given the importance of financial deepening and integration in the internationalization of currencies, any shift will still be gradual.
