2D Pattern Measurement for 3D Virtual Clothing
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Solution Overview
Problem
Measuring accurate lengths between points on three-dimensional (3D) virtual clothing is challenging due to the flexibility of fabric and the application of physical laws, which cause mesh polygons to stretch and distort, making it difficult to measure distances in 3D space.
Innovation Solution
A method and apparatus that measure lengths on a two-dimensional (2D) pattern corresponding to 3D virtual clothing, allowing for the calculation of line segment lengths based on attributes of areas within the 2D pattern, including lengths inside, outside, and between pattern pieces, and accounting for strain rates to adjust measured lengths without resetting points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If length measurement is performed on 3D virtual clothing, then the measurement reflects the actual worn state, but the measurement accuracy deteriorates due to mesh distortion from gravity and material physics
Solution Approach 1:
The patent inverts the measurement approach by measuring lengths on the 2D pattern rather than on the 3D virtual clothing. This reverse measurement strategy avoids the mesh distortion problem entirely, as the 2D pattern remains stable and undistorted while the 3D clothing is subject to gravitational and material forces.
Solution Approach 2:
The patent introduces a mapping relationship between 2D pattern coordinates and 3D virtual clothing points as an intermediary. By establishing correspondence relationships and using transformation matrices, the system enables accurate length measurement through the 2D pattern while still providing information about the 3D clothing dimensions.
2Measurement precision
If 2D pattern measurement is used, then measurement accuracy is maintained, but the ability to represent 3D spatial relationships deteriorates
Solution Approach 1:
The patent makes the measurement system universal by enabling it to handle multiple types of measurements through a single 2D pattern interface. The system can measure lengths within pattern pieces, between different pattern pieces, and even outside the pattern boundary, all while maintaining measurement accuracy and providing 3D spatial context through coordinate mapping.
3Ease of operation
If pattern pieces are separated, then individual pattern piece measurement is simplified, but the measurement of continuous lengths across multiple pieces becomes complex
Solution Approach 1:
The patent segments the measurement process by identifying whether measurement points lie within the same pattern piece or across different pieces. For measurements within a single pattern piece, the system uses direct 2D distance calculation. For measurements across multiple pieces, the system automatically identifies the boundary intersection points and calculates the continuous length by summing segments, thereby simplifying the overall operation.
Data Source
AI summary
A method and apparatus for measuring a measurement of a two-dimensional (2D) pattern receives a plurality of points in a space in which a 2D pattern of clothing is displayed, determines an attribute of an area in which the points are included, measures a length of a line segment using the points based on the determined attribute of the area, and outputs the length of the line segment.