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A Sketch-based 3D Modeling Method Based on Automatic Fitting of Image Contours

A technology of 3D modeling and image contour, applied in image data processing, using manual input to modify/create images, 3D modeling, etc., can solve the problems of reducing design efficiency, time-consuming, affecting user experience, etc., to achieve design intelligence and improve flexibility performance, improved quality and precision

Active Publication Date: 2018-01-23
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

This operation is often time-consuming, which will affect the user experience and reduce the efficiency of the design

Method used

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  • A Sketch-based 3D Modeling Method Based on Automatic Fitting of Image Contours
  • A Sketch-based 3D Modeling Method Based on Automatic Fitting of Image Contours
  • A Sketch-based 3D Modeling Method Based on Automatic Fitting of Image Contours

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Embodiment Construction

[0047] A sketch-style 3D modeling method based on automatic fitting of image contours, its general steps can be found in figure 1 .

[0048] Step 1: Read a two-dimensional design drawing into the computer, such as figure 2 shown. The objects contained in the picture are 2D blueprints of the 3D model. The outline of the picture is required to be relatively clear, in order to be able to correctly identify the outline of the two-dimensional design drawing in the following steps.

[0049] Step 2: Automatically identify the outline of the two-dimensional design drawing, the method used is shown in (M.Cheng, CurveStructure Extraction for Cartoon Images, The 5 th Joint Conference on Harmonious Human Machine Environment, 2009). This method firstly identifies the outline pixels of the two-dimensional design drawing, and then integrates the outline pixels to form multiple continuous outline segments, which are represented by polylines, as shown in image 3 shown.

[0050] Step 3:...

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Abstract

A sketch-style three-dimensional modeling method based on automatic fitting of image contours, which reads in a two-dimensional design drawing of a three-dimensional model, and automatically recognizes the outline of the two-dimensional design drawing; draws a drawing on the computer screen with a mouse, drawing pen or finger The root closed 2D sketch outline; according to the shape characteristics of the 2D sketch outline and its positional relationship with the 2D design outline, automatically fit the 2D sketch outline to the outline of the 2D design drawing ;Automatically fit the 2D sketch contour line to a cubic spline curve; modify the shape of the cubic spline curve by moving, adding, and deleting the control vertices of the cubic spline curve, so that the shape of the 2D sketch contour line fits the 2D curve more closely Design the contour line of the drawing to obtain the expected 3D model shape; according to the contour line of the 3D model, automatically generate a 3D mesh model with a uniform grid. Using this method can realize intelligent, accurate and fast 3D model design.

Description

technical field [0001] The invention relates to a three-dimensional modeling method, in particular to a method for making a three-dimensional grid model based on sketch input and automatic fitting of image contours. Background technique [0002] 3D modeling is widely used in animation, games, entertainment, education and product design. The current 3D modeling method generally starts from a simple basic geometry, and obtains the final 3D model by manipulating and controlling the points, edges, faces and other geometric elements of the 3D model. This method has the disadvantages of complicated operation and high requirements for spatial imagination. [0003] In recent years, the sketch-based 3D modeling method is becoming a research hotspot. As a natural, direct, and fast design method for depicting user intentions, the sketch-based 3D modeling method effectively improves the efficiency and performance of 3D modeling, and improves the way of human-computer interaction. As ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/80G06T17/00
Inventor 张东亮李春晓张婷
Owner ZHEJIANG UNIV
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