关键词: 手绘，平滑去噪，重采样，曲线拟合，三维建模，纹理贴图

Abstract: A method of free modeling based on free hand sketching was proposed.Through the operations including smooth denoising, resampling, curve fitting, the sketch strokes obtained from users were transformed into sequence of evenly spaced points, from which the geometric information of target model was extracted. According to the geometric information, three-dimensional mesh model was generated. The drawing of free body with particular shape can be completed after adding texture mapping and illumination rendering to the 3d mesh model. Experimental results show that the method can be easy and quick to achieve threcdimensional shape modeling in line with users's ketching intention.

Key words: Sketch,Smooth denoising,Re-sampling,Curve fitting,3D modeling, Texture mapping