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Three-dimensional model retrieval method based on sketch

A 3D model and image technology, applied in image analysis, image data processing, special data processing applications, etc., can solve problems such as ignoring the structural features of sketched images, achieve good robustness and accuracy, and a small amount of calculation Effect

Active Publication Date: 2014-07-02
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 2D image here is usually a sketch input by the user. Although the existing 3D model retrieval technology based on the sketch fully exploits the shape and texture features of the sketch image, it ignores the structural features of the sketch image. Features can fully express the sketched image

Method used

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  • Three-dimensional model retrieval method based on sketch
  • Three-dimensional model retrieval method based on sketch
  • Three-dimensional model retrieval method based on sketch

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] Such as figure 1 As shown, a sketch-based 3D model retrieval method includes an offline preprocessing stage and an online retrieval stage. The specific steps of offline pre-preparation are as follows:

[0031] Step 1. Use Direct3D to render each 3D model in the database, and select multiple viewing directions for projection of the rendered 3D model; the rendered 3D model generates a contour map through projection of each viewing direction, thereby generating Several contour maps, each named as a perspective contour map;

[0032] Step 2. Extract the key structure distribution feature KRD for each perspective profile map:

[0033] First, utilize the method of least squares to carry out vectorization processing to the angle profile, convert the angle profile into a vector profile; the vector profile is a figure composed of several line segments; then according to the...

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Abstract

The invention discloses a three-dimensional model retrieval method based on a sketch. According to the method, a new sketch structural characteristic is provided and applied to three-dimensional model retrieval, and therefore the effect of three-dimensional model retrieval based on the sketch is improved. The method includes the steps that firstly, view angle profile diagrams are extracted from three-dimensional models in a database, and then KRD characteristics are extracted from the view angle profile diagrams and stored in the database. After the KRD characteristics are extracted from a sketch input by a user, the view angle profile diagram similar to the sketch is found out from the database through the EMD characteristic matching method, and accordingly a three-dimensional model corresponding to the view angle profile diagram is determined. According to the method, the characteristics of the sketch in structure are exploited fully, and the method has good robustness and accuracy, meanwhile is not large in calculation amount and can completely meet the requirements of practical application.

Description

technical field [0001] The invention belongs to the field of computer information retrieval, and in particular relates to a sketch-based three-dimensional model retrieval method. This method proposes a new feature extraction method of sketch image, which is the excavation of the structural feature of sketch image, and it is a preliminary exploration of the structural feature of sketch image, which has a certain degree of innovation. Background technique [0002] In the past few years, with the development of computer hardware and graphics, more and more 3D technologies have appeared in many fields, and 3D models have been widely used in movies, games, animation and other fields. Nowadays, people can see lifelike and magnificent three-dimensional scenes in movies, such as the three-dimensional scenes in the famous 3D movie masterpiece "Avatar" and the characters and scenery in the scenes are amazing. In the field of games, "Pro Evolution Soccer", "World of Warcraft" and so o...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06T7/00
CPCG06F16/5838
Inventor 肖俊宋荣
Owner ZHEJIANG UNIV
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