Abstract: To create real-word objects from a single input image, with the help of 2D sketches, a novel 3D reconstruction approach for symmetric free-form objects is presented in this paper. Upon the sketching plane defined by the input image, users first assign a symmetry plane for the reconstructed model and draw the sketch curves for each object component interactively. Each shape component can then be created from four sketch curves, that is, a pair of symmetric curves and a pair of non-symmetric general curves. The 3D depth information of the symmetric curves can be determined with respect to the symmetry plane, and the 3D coordinate information of the general curves can also be calculated due to the symmetric curves of the same shape component. According to the recovered 3D constructive curves, each object component can be generated by an improved cross-sectional surface blending scheme and be represented as a triangular mesh. The texture of free-form objects can finally be synthesized from the input image. Experimental results show that our proposed method can generate the real-world objects from a single image effectively.