Pressure-Sensitive Trajectory Units for Smooth Chinese Brush Pen Handwriting
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Solution Overview
Problem
Existing methods for simulating Chinese brush pen handwriting on touch screens require a large number of sampling points, leading to high computational demands, resource consumption, and result in non-smooth, aesthetically inadequate handwriting due to the lack of proper connection between models.
Innovation Solution
A method involving determining trajectory points with trajectory information, establishing raindrop-shaped trajectory units, and calculating connection points to form smooth handwriting by filling polygons based on these units, with optional anti-aliasing treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large number of sampling points are used to simulate Chinese brush pen handwriting, then the handwriting detail and completeness are improved, but the computational demand and resource consumption increase significantly
Solution Approach 1:
The patent divides the handwriting simulation into discrete trajectory units, each representing a segment of the writing path. Each trajectory unit is formed by connecting a series of sampling points, transforming the continuous handwriting into segmented discrete units that can be processed independently and efficiently
Solution Approach 2:
The patent uses a limited number of key sampling points rather than excessive points throughout the entire trajectory. By strategically selecting sampling points at critical positions (such as stroke beginnings, endings, and direction changes), the system achieves adequate handwriting representation with reduced computational load
2Ease of manufacture
If traditional methods are used to connect handwriting models, then the handwriting can be formed, but the connection is non-smooth and aesthetically inadequate
Solution Approach 1:
The patent employs curved connection methods between trajectory units to eliminate sharp angles and create smooth transitions. The connection paths use quadratic or cubic curves that naturally blend the direction and curvature of adjacent stroke segments, producing aesthetically pleasing smooth handwriting that mimics traditional brush pen effects
3Device complexity
If pressure sensitivity is not considered in trajectory units, then the processing is simpler, but the handwriting lacks visual appeal and realism
Solution Approach 1:
The patent incorporates pressure sensitivity information at specific locations along the trajectory to control local characteristics of the handwriting. Pressure values at different trajectory points determine variations in trajectory unit properties such as width, intensity, or styling, creating realistic brush stroke effects where the pen pressure naturally varies across different parts of the same stroke
Data Source
AI summary
A handwriting forming method, a handwriting forming apparatus, and an electronic device are provided. The method includes: determining a group of plurality of trajectory points and obtaining trajectory information of each of the plurality of trajectory points, the trajectory information including a pressure value; establishing a plurality of trajectory units corresponding to the plurality of trajectory points in one-to-one correspondence based on the trajectory information; and connecting the plurality of trajectory units to form a handwriting for displaying. A size of each trajectory unit is determined based on a pressure sensing amount corresponding to the trajectory unit, and the pressure sensing amount is obtained based on the pressure value of a corresponding trajectory point. In the case where the pressure value is less than a first threshold, the pressure sensing amount is a first constant regardless of whether the pressure value of the corresponding trajectory point changes.