Interactive modeling method

Abstract

Disclosed is an interactive modeling method. The method comprises: a consistent segmentation step, i.e., consistently segmenting a multi-visual-angle picture into a plurality of areas; a confidence step, i.e., performing confidence evaluation on each area, obtaining confidence degrees, and comparing the confidence degrees with a threshold; an interaction step, i.e., for a area whose confidence degree is lower than the threshold, returning to the confidence step through manual sketching; a repeating step, i.e., repeating the confidence step and the interaction step until the confidence degree of each area in the plurality of areas accords with the requirement of the threshold; and a modeling step, i.e., generating a building according to a plurality of areas whose confidence degrees accord with the threshold. By using the interactive modeling method, in-depth mining of picture information is realized, and the prior knowledge of a building structure is also combined, so that user interaction is greatly reduced, and the modeling automation degree is effectively improved. Besides, the picture-based interactive building modeling method not only can be used for performing three-dimensional reconstruction, but also can greatly assist with building designing, virtual planning and designing, and the like.

Description

【Technical field】 [0001] The invention relates to an application of image understanding, in particular, an interactive modeling method for extracting buildings is designed. 【Background technique】 [0002] With the popularization of various camera-capable devices, it is very easy to obtain pictures. How to quickly reconstruct the 3D model of the real world with pictures is still a hot and difficult research problem in the field of computer graphics and vision. As the most important part of the urban scene, the construction of its 3D model has attracted extensive attention from academia and industry. [0003] In the existing image-based architectural modeling, two methods, automatic and interactive, are basically used for modeling. [0004] For image-based automatic modeling, it has relatively high requirements for the number of input images and shooting angles. Due to the influence of lighting, mutual occlusion of building structures, and wall textures, it is often difficult...

AI Technical Summary

Problems solved by technology

[0004] For image-based automatic modeling, it has relatively high requirements for the number of input images and shooting angles. Due to the influence of lighting, mutual occlusion of building structures, and wall textures, it is often difficult to obtain ideal shooting angles and a sufficient number of images. On the other hand, buildings, especially modern buildings, have strong regularity, and the matching of multiple pictures in the process of automatic modeling is easy to produce ambiguity. It is difficult for automatic methods to resolve this ambiguity, resulting in poor

[0005] The interactive method requires the user to form a complete geometric structure through a large number of sketches, which is inefficient and needs to be improved.