3D-printing-oriented halftone projection and model generation method

A 3D printing and model generation technology, applied in 3D modeling, 3D image processing, instruments, etc., can solve the problems of low light transmittance, poor light reflectivity and light transmittance of materials, uneven light transmission medium, etc., and achieve production cost Low, wide range of effects

Active Publication Date: 2015-11-04
SHANDONG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low light transmittance of resin printing materials (such as ABS and PLA materials) commonly used in 3D printing, and the inhomogeneity of the light propagation medium, the light reflectivity and light transmittance of the material are poor, and the method based on surface reflection and refraction cannot be used.

Method used

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  • 3D-printing-oriented halftone projection and model generation method
  • 3D-printing-oriented halftone projection and model generation method
  • 3D-printing-oriented halftone projection and model generation method

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0056] like Figure 8 As shown, a halftone projection method and model generation method for 3D printing, including the following steps:

[0057] (1) According to the input parameters, including the distance d between the model to be processed and the light source a and the distance d from the proposed model to the projection surface b , to establish a simulated projection scene for computer simulation.

[0058] (2) For the input image I, generate a feature layer I that maintains the characteristics of the original image f and tint layer I r Two-layer image, calculate the corresponding halftone distribution, that is, feature layer I f The halftone distribution H f and tint layer I r The halftone distribution H r ,like Figure 1b shown.

[0059] (3) For halftone distribution H f and H r Every point p in i , under the printability constraint,...

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Abstract

The invention discloses a 3D-printing-oriented halftone projection and model generation method, which comprises the steps of: decomposing a given image to generate a feature layer and a tone layer, and forming digital halftone distribution; fusing halftone distribution results of the two layers to form halftone distribution satisfying a printability constraint; projecting a plane halftone result onto a given three-dimensional model, and editing the model to obtain non-overlapping holes which can be printed. The 3D-printing-oriented halftone projection and model generation method can engrave an arbitrary image on the surface of the three-dimensional model in a halftone hole form, obtains a shell-like model with small holes through 3D printing while the shell-like model demonstrates the effect of continuous gray scale variation under the projection of lamp light, and can be applied to various occasions such as lamp customization.

Description

technical field [0001] The invention relates to a method for halftone projection and model generation oriented to 3D printing. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. In the early days of this technology, it was often used to make models in mold manufacturing, industrial design and other fields, and now it is gradually being used for direct manufacturing of products. [0003] A continuous tone image usually refers to an image whose tone change from light to dark or from light to dark is formed by the particle density of the imaging material per unit area, and its depth and shade are continuously changing, such as photo negatives and drawings; Halftone usually refers to the color change from light to dark or from light to dark on the printed matter after special processing,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30G06T15/00
Inventor 吕琳陈宝权魏源赵海森
Owner SHANDONG UNIV
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