Research and application of personalized human body simplification and fusion method

Abstract

In crowd simulation, 3D (three-dimensional) character modeling is an important topic since the appropriate character models are helpful to improve the efficiency and realism of crowd simulation. The reconstructed 3D character model based on Kinect has a strong sense of reality and low cost. However, these models are all complex and cannot be applied to large-scale crowd simulation directly. In this paper, we propose a novel personalized human body modeling method for mass crowd simulation based on Kinect. The human modeling process is divided into head modeling and torso modeling, and then they are fused into each other to build a personalized human body model. This method can be divided into two parts: In the first part, a simplified method is presented based on edge curvature and area of error. In addition, to preserve the detail characteristics of model, the way of interactive operation is introduced. In the second part, the automatic fusion for the simplified head model and body model is made by using the improved FCF (fusion control function) fusion method. Finally, a hierarchical database for the personalized human body models is built. The experiment results show that the method proposed in this paper has high efficiency and good robustness in practical applications.

Personalization of a Human Body Model Using Subject-Specific Dimensions for Designing Clothing Patterns

“…However, the variation was not so great with the biggest in the wrist circumference ( 14), followed by the shoulder width (6) and the ankle circumference (21). The lowest variation was in the head circumference (23), followed by the shoulder length (10) and the thigh length (16).…”

“…We used the same polynomial degree n s for axes x and y for segment s, because the polynomials were formed by the same number of circumference dimensions for each segment. Figure 1 also defines additional width dimensions, in particular ( 6) and (10), which were useful as additional measures for personalization. The personalization of each segment is described in detail in the following paragraphs.…”

“…The width was personalized along axis z from the bottom neck using the neck circumference (15) over the neck circumference (15) to the head, where the personalization coefficient held the neck circumference ratio (15). Sixty-two is a new dimension, which is not addressed in the clothing industry, so we took it as the double shoulder length (10) subtracted from the back width (6).…”

“…The arm follows the thorax in the shoulder joint [21]. The height (actually the length of the arm) was personalized using a constant coefficient defined by subtracting the shoulder length (10) from the sleeve length from neck to wrist (11). The depth was personalized by a parabolic polynomial based on the arm circumference (12).…”

“…The scaling procedure implements a reference model and updates its global dimensions to describe an average representative of the population group with the given anthropometry [6][7][8]. Whilst scaling changes only the global dimensions (anthropometry, mass, and stiffness) based on the general anthropometric parameters [6,7], personalization updates the local geometrical and biomechanical details of the particular human body segments [9][10][11] and so leads to a particular subject-specific model. In general, geometrically, the reference model is usually described by a cloud of nodes connected to elements creating the surface mesh.…”