Sketch-type three-dimensional modeling method based on image contour automatic fitting

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

Active Publication Date: 2016-04-20
ZHEJIANG UNIV
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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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  • Sketch-type three-dimensional modeling method based on image contour automatic fitting
  • Sketch-type three-dimensional modeling method based on image contour automatic fitting
  • Sketch-type three-dimensional modeling method based on image contour automatic fitting

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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, CurveStructureExtractionforCartoonImages, The5 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: Draw...

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Abstract

A sketch-type three-dimensional modeling method based on image outline automatic fitting comprises the steps of reading a two-dimensional design drawing of a three-dimensional model, and automatically identifying a contour line of the two-dimensional design drawing; drawing an enclosed two-dimensional sketch contour line on a computer screen by using a mouse, a drawing pen or finger; automatically fitting the two-dimensional sketch contour line onto the contour line of the two-dimensional design drawing according to shape characteristics of the two-dimensional sketch contour line and positional relationship thereof with the contour line of the two-dimensional design drawing; automatically fitting the two-dimensional sketch contour line into a cubic spline curve; modifying the shape of the cubic spline curve by moving, adding or deleting control top points of the cubic spline curve, enabling the shape of the two-dimensional sketch contour line to fit the contour line of the two-dimensional design drawing better, and thus obtaining a desired shape of the three-dimensional model; and automatically generating a three-dimensional grid model of uniform grids according to the contour line of the three-dimensional model. The method can be used for achieving intelligent, accurate and quick design of a three-dimensional model.

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 Applications(China)
IPC IPC(8): G06T11/80G06T17/00
Inventor 张东亮李春晓张婷
Owner ZHEJIANG UNIV
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