3D Object Color Assignment via 2D Image Projection
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Solution Overview
Problem
Conventional methods for processing colors in 3D printing struggle with effectively assigning multiple colors to complex-shaped three-dimensional objects, as they require surface division and are limited in handling intricate shapes and colors.
Innovation Solution
A system and method that utilize appearance information and color information of the outer surface to assign colors to inner coordinates of a 3D object, determining candidate planes and selecting target coordinates to minimize calculation and achieve accurate color assignment within a set offset distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the surface of a 3D object is divided into units of cells to assign colors, then color assignment is simplified, but the method cannot handle complicated shapes or various colors effectively
Solution Approach 1:
Instead of dividing the 3D surface into cells and assigning colors to each cell (conventional approach), the invention inverts the process by projecting 2D image coordinates directly onto 3D surface coordinates. This allows complex shapes to be handled naturally through the projection mapping, eliminating the need for surface division while maintaining color assignment capability.
Solution Approach 2:
The invention transitions from 2D image coordinate space to 3D surface coordinate space through projection. By establishing correspondence between 2D image points and 3D surface points, the system can represent complex 3D shapes with varying colors without dividing the surface into simpler units, thus handling complicated geometries effectively.
2Ease of manufacture
If conventional color processing methods are used, then simple shapes can be colored, but multiple materials or multiple colors cannot be effectively output
Solution Approach 1:
The invention assigns different color information to different regions of the 3D object by projecting 2D image coordinates to specific 3D surface coordinates. This allows each region to have its own color properties, enabling multiple colors and materials to be represented on a single 3D object without requiring separate processing for each material or color.
3Loss of information
If STL file format is used, then appearance information is included, but material or color information cannot be assigned to the 3D output product
Solution Approach 1:
The invention creates a universal color processing method that works with existing 3D modeling file formats (like STL) while adding the capability to assign material and color information. By projecting 2D image coordinates onto 3D surface coordinates, the system can extract both appearance information (retained from the file) and material/color information (added through projection mapping), making the process applicable to various file formats and object types.
Data Source
AI summary
The specification of the instant application is amended. Submitted herewith is a Substitute Specification. The Substitute Specification complies with 37 C.F.R. §§1.52(a)-(b) and 1.125(b), and no new matter has been added to the Substitute Specification. Submitted herewith are clean and marked up versions of Substitute Specification in compliance with 37 C.F.R. §§1.121(b)(3) and 1.125(c). Entry of the Substitute Specification is respectfully requested.