Computer Science ›› 2020, Vol. 47 ›› Issue (11A): 236-240.doi: 10.11896/jsjkx.191100019

• Computer Graphics & Multimedia • Previous Articles     Next Articles

Streamline Adaptive Color Mapping Enhancement Algorithm for Vector Field Visualization

QIN Xu-jia, CHEN Guo-fu, SHAN Yang-yang, ZHENG Hong-bo, ZHANG Mei-yu   

  1. College of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China
  • Online:2020-11-15 Published:2020-11-17
  • About author:QIN Xu-jia,born in 1968,Ph.D,professor,Ph.D candidate supervisor,is a member of China Computer Federation.His main research interests include computer graphics,image processing and data visualization.
  • Supported by:
    This work was supported the National Natural Science Foundation of China (61702455,61672462,61672463) and Natural Science Foundation of Zhejiang Province,China(LY20F020025,LY18F020035).

Abstract: Streamline visualization belongs to geometric visualization.It is an important method to present vector field direction information in an intuitive way.In order to display the vector field strength information on the streamline and better display the vector field attributes,a streamline coloring method which adaptively selects the mapping mode according to the characteristics of the vector field strength distribution is proposed.The formula for calculating the skewness coefficient of vector field strength distribution is derived.Firstly,Sobol sequence is used to determine the position of the seed points of the streamline,and the streamline is generated according to the seed points.Then,the skewness coefficient of vector field strength data set is calculated.Compared with the threshold values,the appropriate color mapping method is selected to color the streamline.Experimental results show that the Sobol sequence can be used to determine the location of streamline seed points,and the streamline distribution of vector field can be more uniform.The vector field data distribution can be quantized as the skewness coefficient,and a more appropriate color mapping method can be selected according to the skewness coefficient,so that the effect of color mapping can better describe the actual situation of the field strength distribution of vector field.

Key words: Color mapping, Skewness coefficient, Streamline, Vector field

CLC Number: 

  • TP391
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