The Research Of Parametric Human Body Model Construction And Application In Virtual Dressing Based On Statistical Characterization

With the development of computer technology and virtual dressing technology,users are also increasingly concerned about the apparel in the virtual dressing and the user’s own conditions is fitting or not,3D human body modeling in the virtual dressing system gradually developed.In this dissertation,a parametric human model based on statistical characterization is constructed to establish the objective function of the change of body size data caused by human body shape deformation,under the premise of statistical human characterization,to achieve parametric human body modeling.This paper studies the regulation of the human body on the gender,age,muscle,body weight,height,body proportion,race and chest morphology,and then constructs an objective function to achieve its change.At the same time,we establishes the linkage between the changes of its main elements and determines the number of objective functions required by the main elements of the human model variation process.Then for the 3D human model point cloud data changes research in the interpolation function to determine the linear interpolation function to find the way to achieve the human body three-dimensional point cloud data changes.On this basis,according to a large number of human model point cloud data characteristics,to determine the intermediate human point cloud model.Through the middle human body model point cloud plus 3D human point cloud changes in the objectivefunction,to achieve the human body to the desired human model changes.In the course of the research,according to the linkage between the changes of the main elements of the human body.The first to establish the weight of changes between individual elements.Then the establishment of a number of factors change between the weight distribution and weight adjustment method of calculating the value.Finally,according to the established research methods,output the main body after the adjustment of the human body model changes.Then determine the human body posture,body shape,adjust the weight of the objective function.The human body factors and body size data are transformed into weight adjustment of 0-1 through neural networks and other means to achieve the adjustment of the point cloud of the objective function.The realization of 3D human body modeling in the research process is to adjust the weight of the point cloud data of the model according to the size of the specific manikin and the actual human body so as to achieve consistency between the constructed3 D human body model and the real human body in the same size of the neck circumference,neck length,maximum upper arm circumference,upper arm length,forearm length,wrist circumference,chest width,chest circumference,lower bust,waist circumference,neck dew point to waist point long navel point,Hip circumference,thigh length,thigh muscle maximum circumference,calf length,maximum calf muscle circumference,knee circumference and others.Twenty target functions for body size adjustment are constructed,and more human size parameters can be added to establish a more detailed objective function of dimensional change.According to the location of the key parts of the human body,getting the key parts of the human body circumference and length of the point cloud coordinates.Then calculate the size of the key part according to the coordinates of its key body point cloud.Combined with the actual human size data and human body model to adjust the size,then we can achieve point cloud length and circumference changes.We according to the actual human body on the construction of 3D human model,we can build 3D mannequin variant interface,software.On the basis of the application of the virtual dressing on the constructed 3D human body model,and show the actual body based on the 3D human virtual dressing.The human body model constructedby the 3D human body model variant method can be imported into the 3D software and the virtual dressing software,with its human data with clothing CAD software can be produced in line with the actual human data clothing,and then to achieve the true state of dress and fit.And as the human body model of the 3D human body model meets the needs of the customers,the customer file can be saved.After the customer can choose the costume of the test results in a timely manner to the picture feedback to the customer.