Texture mapping method for three-dimensional curved surface of irregular plant leaf

Abstract

The invention discloses a texture mapping method for a three-dimensional curved surface of an irregular plant leaf, and belongs to the technical field of computer graphs. The method comprises the following steps of: S1, extracting the skeleton of the leaf from the three-dimensional mesh curved surface of the plant leaf, wherein the skeleton consists of a curve c1 roughly parallel to the main leafvein direction of the leaf and a curve c2 basically vertical to the c1; S2, segmenting the constructed skeleton curve to associate the mesh vertex on the curved surface with a curve segment closest to the vertex, wherein in the step, segmentation points are generated on the curves c1 and c2; S3, making the mesh vertex on the curved surface correspond to the segmentation points generated in the step S2, and calculating texture coordinates of each mesh vertex; and S4, selecting a texture image most suitable for the curved surface by using the texture coordinates calculated in the step S3. By adopting the method, the real plant leaf image can be quickly mapped onto a three-dimensional model of the plant leaf, and texture disorder generated during texture mapping on the curved surface of the irregular three-dimensional plant leaf in the conventional method is avoided.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to a texture mapping method for three-dimensional curved surfaces of irregular plant leaves. Background technique [0002] Texture mapping is one of the key technologies in graphic modeling and modeling design. It can significantly enhance the realism of 3D models and improve the realistic effect of virtual scenes. Compared with industrial products with regular or certain geometric parameter constraints such as automobiles, ships, and aircraft parts, plants have more complex outlines and surface details. Therefore, the texture mapping of 3D plant models is a difficult problem. Not only good Texture pictures also need a good texture mapping method to perform undistorted and disorder-free texture mapping on 3D models of plant organs with uneven surfaces and irregular curls or distortions. [0003] Leaf is one of the most important organs of plants, and there have been many ...

AI Technical Summary

Problems solved by technology

However, this method is only applicable to flat plant leaves. For leaves with obvious curls or folds, when taking images of leaves from above the leaves, some leaf areas will overlap or be blocked on the picture. Apply this method. method will also lead to texture disorder

[0006] In summary, the existing texture mapping methods for 3D plant leaf models are aimed at objects with specific morphological structures (for example, parametric surfaces such as Bézier surfaces and NURBS surfaces can be used) described leaves), leaves with symmetrical structure and consistent convex edges, or leaves with flat surfaces, so there are still some deficiencies, mainly in that the existing methods are mainly suitable for relatively flat surface shapes and edge contours. For relatively simple leaves, for irregular three-dimensional surfaces of plant leaves with large folds, curls, or jagged edges or many splits, texture mapping by these methods will cause texture disorder, and it is difficult to obtain a good texture mapping effect

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