Abstract
Digital geometry processing of hand-drawn pressure-sensitive trajectories oriented toward Web-based three-dimensional (3D) modeling becomes attractive problem. Existing practices usually focus on converting raw trajectories into 3D stroke meshes with consistent line width, which the pressure information can not been fully utilized for denoising, simplification and reflecting realistic graphics of 3D stroke mesh. Also, there are little research on the high quality of trajectory with data transmission fluency and light weight in the Web environment. We propose a lightweight processing method for hand-drawn pressure-sensitive trajectories that is oriented toward Web-based 3D modeling. An angle-chord height united trajectory simplification (ACUTS) algorithm is proposed, in which the discrete points are simplified by comprehensively considering the angle deviation and chord height deviation with the sliding window mechanism. In addition, a lightweight reconstruction algorithm based on pressure -sensitivity for discrete points (LRPDP) is also proposed, in which the pressure value can be fully utilized for simplifying the redundant points while ensuring the reconstructed 3D stroke mesh more realistic. Besides, the experimental results show that compared to some other methods, we perform best in terms of data reduction using compression ratio and reduction percentages. We also perform best in terms of high accuracy of 3D stroke mesh using mean stochastic error distance, local maximum error and total length error. Although the insufficient utilization of the pressure-sensitive information limits our research to some extents, the significance of our research is to provide a new strategy to realize Web-based 3D modeling using hand drawing mode.
Highlights
Three-dimensional (3D) modeling is a key technology that uses computers and graphics equipment to help engineers and technicians in 3D product design work [1]
To further simplify the trajectory data, the resampled discrete points are simplified by comprehensively considering the angle deviation and chord height deviation with the sliding window mechanism, which can make the trajectory data lightweight and achieves a high degree of accuracy
The purpose of the trajectory compression is to make the trajectory data achieve a high degree of accuracy and light weight, and the purpose of the pressure-sensitive trajectory processing is to map the collected pressure information into adaptive-width hierarchical point cloud data to ensure that the generated hand-drawn trajectory 3D stroke mesh performs with light weight with inconsistent widths
Summary
Three-dimensional (3D) modeling is a key technology that uses computers and graphics equipment to help engineers and technicians in 3D product design work [1]. F. Zhao et al.: Lightweight Processing Method for Hand-Drawn Pressure-Sensitive Trajectories Oriented Toward Web-Based can create 3D models using their creativity. Zhao et al.: Lightweight Processing Method for Hand-Drawn Pressure-Sensitive Trajectories Oriented Toward Web-Based can create 3D models using their creativity It is widely used in 3D modeling technology education and information technology education in middle schools and primary schools. An interesting target problem named ‘‘lightweight processing for hand-drawn pressure-sensitive trajectories’’ is proposed, that is, to simplify the hand-drawn pressure-sensitive trajectories with low loss or lossless, and reconstruct to the 3D stroke mesh in the Web environment It makes the higher execution efficiency of the digital geometry processing algorithm to satisfy the low time complexity of the algorithm in the Web environment.
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